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Analysis, classification and identification of gastropod locomotive mucus by Fourier transform infrared spectroscopy J. Molluscan Stud. (IF 1.2) Pub Date : 2024-03-09 Edgar Barajas Ledesma, Chris Holland
Mucus is a defining feature of many gastropod phenotypes. Its material properties are a product of selection acting on the relationship between mucus composition, structure and performance; however, to date, there are very few studies addressing this. Here, we introduce attenuated total reflection Fourier transform infrared (FTIR) spectroscopy as an accessible analytical technique to record, identify
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Variability in the white spot: a new genus and species of Discodorididae (Nudibranchia) from the central and western Pacific Ocean J. Molluscan Stud. (IF 1.2) Pub Date : 2024-02-08 Samantha A Donohoo, Terrence M Gosliner
In this paper, a new genus in the nudibranch family Discodorididae, Avaldesia n. gen., is established for Avaldesia albomacula (Chan & Gosliner, 2007) and Avaldesia tahala (Chan & Gosliner, 2007), originally assigned to the genus Thordisa Bergh, 1877, and a new species, Avaldesia tamatoa n. sp., described here from the central Pacific. To establish species relationships within Avaldesia, as well as
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On reproduction in the Pacific boreal limpet Erginus (Problacmaea) puniceus Lindberg, 1988 (Patellogastropoda: Rhodopetalidae) J. Molluscan Stud. (IF 1.2) Pub Date : 2024-01-27 John Buckland-Nicks, Arkadiy Reunov, Olga Yurchenko
Fifty years ago, it was reported that individuals of the Pacific boreal limpet Problacmaea (= Erginus) bear a penis for copulation and brood their young in the pallial cavity. These observations were based on light microscopy, but now we reveal new details of the reproductive biology of Erginus (Problacmaea) puniceus with electron microscopy. Gametogenesis is fundamentally similar to other Patellogastropoda
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Mating roles, copulation duration and reproductive output in the hermaphroditic freshwater snail Planorbella trivolvis J. Molluscan Stud. (IF 1.2) Pub Date : 2024-01-27 Cynthia G Norton
Hermaphrodites exhibit a wide variety of reproductive strategies, yet empirical studies lag behind theories about their evolution. Planorbella trivolvis, a simultaneous hermaphrodite capable of reciprocal copulation and rare self-fertilization, provides a unique model system for studying reproduction. This study assessed sex roles during mating, demonstrating that mating is primarily reciprocal, and
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Ontogenetic variability in the diel activity pattern of the marine gastropod Cassis cornuta (Mollusca: Cassidae) J. Molluscan Stud. (IF 1.2) Pub Date : 2024-01-25 Lala Grace Calle, Patrick C Cabaitan, Sherry Lyn G Sayco, Shau Hwai Tan, Cecilia Conaco
Examining activity patterns is essential in understanding gastropod feeding and movement ecology. However, the diel activity patterns of large-bodied gastropods, such as Cassis cornuta, remain poorly studied. Here, we conducted outdoor hatchery-based experiments to examine the diel activity patterns of C. cornuta adults and juveniles under natural sunlight and photoperiod. Activities of C. cornuta
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Geographic differences in the diet and isotopic niche of Octopus hubbsorum (Cephalopoda: Octopodidae) in the Mexican Pacific J. Molluscan Stud. (IF 1.2) Pub Date : 2023-11-28 Alejandra Mazariegos-Villarreal, Andrea Grissel Chávez-Pillado, Karla León-Cisneros, Jasmín Granados-Amores, Tatiana A Acosta-Pachón, Marco Antonio Medina-López, Elisa Serviere-Zaragoza
Octopus hubbsorum is an important fisheries resource in the Mexican Pacific and a link among different trophic levels due to its ecological role as both predator and prey. In this study, the spatial variations in the diet, isotopic niche and trophic position of O. hubbsorum were determined by analysing digestive contents along with carbon and nitrogen stable isotopes. Octopuses were sampled from four
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Shedding light on a species complex within the genus Goniodoridella Pruvot-Fol, 1933 (Nudibranchia: Goniodorididae), with the description of three new species J. Molluscan Stud. (IF 1.2) Pub Date : 2023-11-16 Sofía Paz-Sedano, Irina Ekimova, Dimitri Smirnoff, Terrence M Gosliner, Marta Pola
Goniodoridella Pruvot-Fol, 1933 is a genus of small nudibranchs found in the Indo-Pacific Ocean. Currently, the genus includes only two described species, the widely distributed type species Goniodoridella savignyi Pruvot-Fol, 1933 and G. borealis Martynov, Sanamyan & Korshunova, 2015, which is found in the northern Sea of Japan. However, because of the presence of a group of cryptic species, the known
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Genetic analysis is compatible with recent human-mediated range expansion of Filopaludina from India into the Mesopotamian Plain J. Molluscan Stud. (IF 1.2) Pub Date : 2023-10-06 Björn Stelbrink, Hanan Zwair, Ali Abdulhamza Al-Fanharawi, Thomas von Rintelen
In the present study, we genetically analyse populations of ‘Filopaludina bengalensis’ from the Euphrates River (Iraq), more than 4,000 km from its type locality. By sequencing several mitochondrial and nuclear genes, we aimed to test whether this population indeed belongs to F. bengalensis from India and how it is related to other members of the genus. Our molecular phylogeny shows that the individuals
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Did Captain Beechey see a living Mandarina luhuana, an extinct land snail species? J. Molluscan Stud. (IF 1.2) Pub Date : 2023-10-03 Satoshi Chiba
Knowledge about prehuman biotas and the impact of early human contact, particularly on land snails inhabiting oceanic islands, is still poor. One specific example of interest is Mandarina luhuana, which was first collected from the Chichijima Islands of the Ogasawara Archipelago in 1827 during Captain Frederick William Beechey's expedition. The initial description of M. luhuana included an image of
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Molecular phylogeny and biogeography of the living Pleurotomariidae (Vetigastropoda), with the description of a new genus J. Molluscan Stud. (IF 1.2) Pub Date : 2023-09-25 M G Harasewych, Patrick Anseeuw, Dario Zuccon, Nicolas Puillandre
The once diverse family Pleurotomariidae had a widespread global distribution spanning shallow-water faunas throughout the Mesozoic but is presently known only from bathyal habitats along the western margins of the Atlantic and Indo-Pacific Oceans at temperate and tropical latitudes. We evaluate the relationships among surviving lineages of Pleurotomariidae using partial sequences of two mitochondrial
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A phylogeographic assessment redefines the distributions of Truncilla species (Bivalvia: Unionidae) in Texas J. Molluscan Stud. (IF 1.2) Pub Date : 2023-08-29 Rachel Saxon, Charles R Randklev, Kevin J Roe, Clinton R Robertson, Chase H Smith
Truncilla macrodon¸ the Texas Fawnsfoot, is currently considered to be restricted to the Brazos and Colorado river drainages in central Texas, USA. Subfossil specimens resembling T. macrodon from shell middens in the Trinity river drainage have raised questions about its presumptive range. Extant Truncilla populations occupying the Trinity river drainage are believed to be Truncilla donaciformis, the
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The protobranch Aequiyoldia eightsii (Jay, 1839) (Nuculanida: Sareptidae) reveals uncommon siphonal anatomy among bivalves J. Molluscan Stud. (IF 1.2) Pub Date : 2023-07-18 A R Batistão, J A Audino, F D Passos
Siphons represent a remarkable example of evolutionary convergence in different bivalve lineages. In Protobranchia, the siphons, when present, are used exclusively to channel the water currents used for respiration, waste removal and gamete release. Their emergence is thought to be associated with the taxonomic and morphological diversification within the Nuculanida. While siphons have been extensively
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Shell drilling and gonad biopsies provide a rapid, nonlethal method for in situ assessment of reproductive periodicity in a turbinid gastropod J. Molluscan Stud. (IF 1.2) Pub Date : 2023-06-13 Kate Seinor, Kirsten Benkendorff
Reproductive data on marine molluscs are imperative for informing conservation and management strategies. Most methods for assessing reproductive periodicity are lethal, which could be unfavourable for fragile populations. This study aimed to trial a nonlethal, drill-biopsy technique for assessing the reproductive cycle in the turbinid gastropod, Turbo militaris. This technique was tested in the laboratory
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More than meets the eye: characterizing the cryptic species complex and Symbiodiniaceae communities in the reef-dwelling nudibranch Pteraeolidia ‘semperi’ (Nudibranchia: Aeolidioidea) from Singapore J. Molluscan Stud. (IF 1.2) Pub Date : 2023-05-31 Nathaniel Soon, Z B Randolph Quek, Sebastian Pohl, Benjamin J Wainwright
The advent of molecular systematics has revolutionized our knowledge of biodiversity, revealing undiscovered cryptic lineages across the tree of life. Correspondingly, an increasing number of nudibranch species complexes have been found and described through integrative taxonomic approaches. Pteraeolidia ‘semperi’ (Nudibranchia: Cladobranchia: Aeolidioidea) presently represents a species complex, possessing
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Long-term relationships between the abundance of pest molluscs and weather in agricultural fields in South Australia J. Molluscan Stud. (IF 1.2) Pub Date : 2023-05-25 Geoff H Baker
Invasive snails, Cernuella virgata, Theba pisana and Cochlicella acuta, infest grain crops prior to harvest in early summer in southern Australia. They breed in autumn–early winter and peak in abundance in spring following the recruitment of young snails. Long-term studies (20 years) were established on three farms in South Australia (two practicing pasture–cereal rotations and one continuous cropping)
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When a genus must become two: resurrection of Pelagella Gray, 1850 with the description of six new species J. Molluscan Stud. (IF 1.2) Pub Date : 2023-05-17 Sofía Paz-Sedano, Dimitri Smirnoff, Terrence M Gosliner, Marta Pola
Goniodoris is the third most diverse genus of the nudibranch family Goniodorididae. The genus has undergone several taxonomic changes, with c. one-third of the recognized species of Goniodoris having been synonymized (most of these are junior synonyms of genera from other families). In addition, Goniodoris includes other synonymized genera within it, such as Pelagella, which was erected for Doris pareti
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Comparative analysis of three families of hygrophilid snails shows that the egg mass fluid protein haemocyanin-like 1 (Hcl-1) is unique to planorbids J. Molluscan Stud. (IF 1.2) Pub Date : 2023-04-25 Janeth J Peña, Eric S Loker, Coen M Adema
The egg mass fluid (EMF) of the freshwater snail Biomphalaria glabrata (Hygrophila: Planorbidae) contains haemocyanin-like 1 (Hcl-1) protein, distinct from respiratory haemocyanins. The distribution of Hcl-1 was investigated among major families of Hygrophila, Physidae and Lymnaeidae, both of which employ respiratory haemocyanins, and Planorbidae, a group that evolved haemoglobin as a respiratory pigment
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Left–right asymmetry of the visual system in the scallop Nodipecten nodosus (Bivalvia: Pectinidae) J. Molluscan Stud. (IF 1.2) Pub Date : 2023-04-21 Jorge A Audino, Jeanne M Serb, José E A R Marian
Left–right asymmetries are consistent differences between the left and right sides and represent an intriguing feature of molluscan morphology. Interestingly, external asymmetries, such as inequivalve shells, are often coupled with lateralization in the nervous system, which often includes functional and structural specializations of the left or right sides. In the case of visual asymmetries, lateralized
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Substrate specificity of phenoloxidase-like activity in an ecoimmunological model species Lymnaea stagnalis J. Molluscan Stud. (IF 1.2) Pub Date : 2023-03-16 Otto Seppälä, Tamara Schlegel
Ecoimmunological research on molluscs and other invertebrates frequently quantifies phenoloxidase (PO) activity to estimate the strength of the immune function. PO enzymes form different families whose relative roles in oxidative reactions are typically unknown. Understanding this could allow enzyme-specific assays with higher accuracy than in commonly used nonspecific assays. We tested the contribution
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Development of Lacuna pallidula (da Costa, 1778) from the White Sea (Caenogastropoda: Littorinimorpha) with emphasis on radula formation J. Molluscan Stud. (IF 1.2) Pub Date : 2023-03-15 Elena Vortsepneva, David G Herbert, Yuri Kantor
The gastropod radula is highly diverse in structure in comparison with that of other mollusсs. The main radular types in the different phylogenetic groups of gastropods differ not only in the general morphology and configuration of the teeth but also in the mode of tooth synthesis and the ultrastructure of the formation zone. Previously, the formation and anlage of the radula in the ontogeny of radulae
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Shell shape as a potential predictor of age class in the invasive snail Lissachatina fulica J. Molluscan Stud. (IF 1.2) Pub Date : 2023-02-20 Gabriel Marins, Angie Patiño-Montoya, Rosana Tidon
Understanding the life-history traits of invasive species can increase the effectiveness of eradication efforts and decrease costs. In the giant African snail Lissachatina fulica, one of the 100 worst invasive species on the planet, age structure can be an important indicator of invasiveness. Here, we associated variation in snail size with variation in weight and shell shape, in an effort to better
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Holocene molluscan successions from southeastern Spain (Galera, Andalusia): a palaeoenvironmental framework and a palaeobiogeographic resource of the Granada UNESCO Geopark J. Molluscan Stud. (IF 1.2) Pub Date : 2023-01-12 Quentin Wackenheim, Christiane Richter, Nicole Limondin-Lozouet, Daniel Wolf, Francisco Juan García-Tortosa, Elisa Marzin, Luise Hofmann, Julie Dabkowski, Dominik Faust
In Spain, Holocene deposits are widespread, and although they have been extensively investigated by quaternarists for several decades, their malacological content has remained scarcely studied. In the framework of a German–French–Spanish collaboration, alluvial and tufa sequences in the Baza Basin, Andalusia, Spain are analysed with a multidisciplinary approach, including the analysis of the molluscan
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Improving external shell volume estimation in snails using landmark-based size measurements J. Molluscan Stud. (IF 1.2) Pub Date : 2022-12-22 Teresa Rose Osborne, Stephen V Stehman
Shell images in digital collections and publications enable taxonomically, geographically and morphologically broad approaches to studying gastropod body size. Because traditional linear size measurements are not directly comparable across morphologically disparate taxa, we propose a transition to landmark-based size measurements, which are less sensitive to shape differences. Traditional and landmark-based
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Living in solitude or building reefs: ecophenotypic variation of the vermetid Petaloconchus varians revealed by mitochondrial DNA analysis J. Molluscan Stud. (IF 1.2) Pub Date : 2022-11-18 André Breves, Thiago Silva de Paula, Paula Spotorno, Maurício Romulo Fernandes, Gisele Lôbo-Hajdu, Alexandre Dias Pimenta
This study aimed to investigate whether the marine snails Petaloconchus varians (d'Orbigny, 1839) and Petaloconchus myrakeenae Absalão & Rios, 1987 from southeastern Brazil are conspecific. Both species were described from Rio de Janeiro, and they diverge mainly in their growth forms (i.e. gregarious for P. varians and solitary for P. myrakeenae). Examination of shell features, operculum, radula and
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Closing the gap: a new phylogeny and classification of the chemosymbiotic bivalve family Lucinidae with molecular evidence for 73% of living genera J. Molluscan Stud. (IF 1.2) Pub Date : 2022-10-06 John D Taylor, Emily A Glover, Benedict Yuen, Suzanne T Williams
New molecular phylogenies of the chemosymbiotic bivalve family Lucinidae, using 18S rRNA, 28S rRNA and cytochrome b genes, include species from genera not previously analysed. Notable additions from Myrteinae are sequences from Rostrilucina, Solelucina and Taylorina species, species of Ustalucina, Gonimyrtea from Leucosphaerinae and additional species of Ctena, Codakia, Lucinoma and Divalucina from
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Effect of culture depth on the shell thickness of the blue mussel Mytilus edulis: a practical case study comparing direct and indirect methods of measurement J. Molluscan Stud. (IF 1.2) Pub Date : 2022-08-29 Daria Gallardi, Harry M Murray
Mytilus species have a fundamental role in coastal environments and constitute an important aquaculture resource. Their shell has a protective function and is affected by multiple factors, such as the size of the animal, density, environmental characteristics and presence of predators. It is crucial to accurately estimate shell thickness in order to understand the effects of the ever-changing environment
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Response of optic gland pathways to thermal stress in the reproductive phase of female Octopus maya J. Molluscan Stud. (IF 1.2) Pub Date : 2022-07-20 Alison Domínguez-Estrada, Clara E Galindo-Sánchez, Claudia Ventura-López, Carlos Rosas, Oscar E Juárez
The octopus optic glands are the source of multiple signalling molecules that control the transitions through different physiological stages, such as maturation, ageing and death. This study focused on the role of the optic glands during the reproductive phase of Octopus maya, investigating the molecular mechanisms that prevent reproduction at elevated temperatures. RNA sequencing was used to analyse
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Assessing the morphological impacts of long-term harvesting in intertidal gastropods using historical data and morphometric tools J. Molluscan Stud. (IF 1.2) Pub Date : 2022-07-09 Darragh Doyle, João Frias, Martin P Gammell, Michael Lynch, Roisin Nash
Size-selective harvesting of intertidal molluscs is a common practice. However, the effects of long-term traditional harvesting remain unclear. Changes in mean shell size are generally taken as evidence of changes in harvesting intensity. However, mean shell size is also influenced by environmental pressures, which may confound the analysis of size variation over time. In this study, we apply geometric
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Molecular survey of Cryptoplax japonica (Polyplacophora: Cryptoplacidae) reveals cryptic lineages in the northwestern Pacific J. Molluscan Stud. (IF 1.2) Pub Date : 2022-07-05 Jina Park, Yucheol Lee, Taeho Kim, Elizabeth Kern, Hyun-Jong Kil, Douglas J Eernisse, Hiroshi Saito, Joong-Ki Park
The chiton genus Cryptoplax is widely distributed in the Indo-Pacific, extending to southern Australia and the northwestern Pacific (NWP), with 17 recognized species. Among these species, Cryptoplax japonica is commonly found on rocky intertidal and subtidal substrates in the NWP, whereas another species, C. propior, is rarely seen because of its cryptic subtidal habitat and limited distribution. In
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Taxonomic revision and conservation assessment of the Southeast Asian freshwater mussel genus Chamberlainia Simpson, 1900 J. Molluscan Stud. (IF 1.2) Pub Date : 2022-04-27 Ana Goncalves,Alexandra Zieritz,Manuel Lopes-Lima,Gridsada Deein,John Pfeiffer
ABSTRACT Chamberlainia hainesiana (Lea, 1856) (Unionidae) is the most economically important freshwater mussel in Thailand and is commonly used in food, spiritual ceremonies and pearl culture. Despite the clear economic importance of this monotypic genus, the distribution and diversity of Chamberlainia Simpson, 1900 are poorly understood. We set out to re-evaluate the taxonomic and geographic boundaries
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The mitogenome of the sunken wood limpet Notocrater youngi: insights into mitogenome evolution in Lepetellida (Gastropoda: Vetigastropoda) J. Molluscan Stud. (IF 1.2) Pub Date : 2022-04-27 Juan E Uribe,Makiri Sei,M G Harasewych
ABSTRACT The complete mitochondrial genome of the pseudococculinid limpet Notocrater youngi was determined using Illumina sequencing and found to be a double-stranded circular molecule 15,915 bp in length. It contains the usual 13 protein-coding genes, 2 ribosomal RNA genes and 22 transfer RNA genes, although with a gene order that differs from those of all other presently known Vetigastropoda, and
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Predicted changes in temperature, more than acidification, affect the shell morphology and survival of the girdled dogwhelk, Trochia cingulata (Linnaeus, 1771) J. Molluscan Stud. (IF 1.2) Pub Date : 2022-04-21 Nicole Martin,Susana Clusella-Trullas,Tamara B Robinson
Abstract Despite the existing body of research that considers altered ocean temperature and acidification as co-occurring stressors, our understanding of the consequences of such shifts remains limited. This is particularly problematic in relation to predators such as whelks, as they can exert strong top-down control of communities yet, as calcifying ectotherms, they are likely to be vulnerable to
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Molecular phylogenetics reveals the common species of Trochus (Vetigastropoda: Trochidae) found on Japanese temperate subtidal reefs J. Molluscan Stud. (IF 1.2) Pub Date : 2022-04-21 Shuhei Sawayama,Takashi Yanagimoto,Seinen Chow,Toshihiro Onitsuka,Norio Shirafuji,Jun Hayakawa,Hiroaki Kurogi
Abstract Five species of the marine gastropod genus Trochus are found on the Japanese coast. It was considered that Trochus rota was the most northerly species, whereas subtropical species, including T. histrio, were limited to the southern region. In recent years, however, several researchers have reported shells of T. histrio at higher latitudes than the previously assumed northern limit of this
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Transcriptomic analysis identifies candidate genes for shell colour formation in the Venus clam Cyclina sinensis J. Molluscan Stud. (IF 1.2) Pub Date : 2022-04-04 Min Wei,Mingyue Zhang,Yuchen Wu,Yiwo Wang,Pan Qiu,Jiawen Zhang,Lei Wu,Jie Song,Yuxuan Sun,Leilei Tan,Xue Yu,Yu Liu,Zhiguo Dong
ABSTRACT Some bivalves are important in fisheries and aquaculture, and provide significant economic benefits to humans. The diversity in shell colour among bivalves has received attention due to its potential in breeding and its relevance to the study of speciation and adaptation. In this study, the relationship between whole-genome-scale gene expression and shell coloration in the clam Cyclina sinensis
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Interspecific competition among terrestrial slugs J. Molluscan Stud. (IF 1.2) Pub Date : 2022-04-04 Johan Watz,Daniel Nyqvist
ABSTRACT Interspecific competition among terrestrial gastropods has previously been considered to have little effect on population dynamics and local distribution. Recent studies, however, demonstrate several cases in which interspecific competition plays a major role in structuring terrestrial gastropod communities. To explore the general importance of interspecific competition for the ecology of
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Differentiation of European invasive clams of the genus Corbicula (Cyrenidae) using shell shape analysis J. Molluscan Stud. (IF 1.2) Pub Date : 2022-02-24 Morhun H, Vinarski M, Labecka A, et al.
ABSTRACTHere, we investigate the shell shape variation of some closely related freshwater species of the bivalve genus Corbicula using descriptive (qualitative), geometric morphometric and traditional conchometric approaches. The combination of these different approaches allows for an effective discrimination between the species C. fluminalis, C. fluminea and C. leana, as well as an unidentified Corbicula
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Ancestral morphology and taxonomic utility of squid statoliths (Cephalopoda: Loliginidae) J. Molluscan Stud. (IF 1.2) Pub Date : 2022-02-24 Díaz-Santana-Iturrios M, Pacheco-Ovando R, Ibáñez C, et al.
ABSTRACTLoliginid squids from the northeastern Pacific are partially sympatric, and their identification is difficult as their diagnostic characters often overlap. Statoliths are hard structures that may vary with respect to phylogeny and thus have potential use in taxonomy. This, however, has to be investigated using robust methods. Here, we employ geometric morphometrics to evaluate the taxonomic
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Differential effects of increased salinity on growth and survival of a native and a nonnative apple snail species J. Molluscan Stud. (IF 1.2) Pub Date : 2022-02-22 Susan Laramore,Caitlyn Courtemanche,Naomi Huntley
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Corrigendum to "Pushing barcodes to their limits: phylogenetic placement of Fontigens Pilsbry, 1933 (Caenogastropoda: Littorinimorpha: Truncatelloidea) and elevation of Fontigentidae Taylor, 1966 J. Molluscan Stud. (IF 1.2) Pub Date : 2022-02-22 Nicholas S Gladstone,Nathan V Whelan
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Very short mountings are enough for sperm transfer in Littorina saxatilis J. Molluscan Stud. (IF 1.2) Pub Date : 2022-02-22 Perini S, Butlin R, Westram A, et al.
ABSTRACTConflict over reproduction between females and males exists because of anisogamy and promiscuity. Together they generate differences in fitness optima between the sexes and result in antagonistic coevolution of female and male reproductive traits. Mounting duration is likely to be a compromise between male and female interests whose outcome depends on the intensity of sexual selection. The
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Marking the shells of juvenile and adult eastern oysters, Crassostrea virginica, with the fluorochrome dye calcein and measuring growth and mortality after marking J. Molluscan Stud. (IF 1.2) Pub Date : 2022-01-31 Jason E Spires, Elizabeth W North
Techniques for positive re-identification of finfish are well developed and are used to estimate vital rates, migration patterns and stock structure. Fluorochrome dyes, like nontoxic calcein, have been used with success to mark hard parts of fish and the shells of some molluscs. Yet, despite the commercial and ecological importance of the eastern oyster Crassostrea virginica, a systematic evaluation
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A method of culturing and breeding slugs through several generations J. Molluscan Stud. (IF 1.2) Pub Date : 2022-01-19 McDonald-Howard K, Williams C, Jones H, et al.
Royal Horticultural Society
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Pushing barcodes to their limits: phylogenetic placement of Fontigens Pilsbry, 1933 (Caenogastropoda: Littorinimorpha: Truncatelloidea) and elevation of Fontigentidae Taylor, 1966 J. Molluscan Stud. (IF 1.2) Pub Date : 2022-01-04 Gladstone N, Whelan N.
National Museum of Natural History10.13039/100006271Alabama Department of Conservation and Natural Resources10.13039/100011887
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Phylogenetic relationship and habitat both impact the gut microbiome in two microendemic gastropods J. Molluscan Stud. (IF 1.2) Pub Date : 2022-01-13 Ashley D Walters, Alex Arp, Gina M Cerbie, Daniel A Trujillo, Andor J Kiss, David J Berg
Bacterial communities associated with eukaryotes play important roles in the physiology, development and health of their hosts. Additionally, the composition of microbes associated with eukaryotes can be indicative of evolutionary history, environment and life history. Here, we investigated the microbial ecology of two sympatric caenogastropod taxa belonging to the family Hydrobiidae, Juturnia kosteri
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Mitogenomic analyses shed new light on phylogenetic relationships within the genus Ruditapes (Bivalvia: Veneridae) J. Molluscan Stud. (IF 1.2) Pub Date : 2022-01-12 Yumeng Liu, Peizhen Ma, Zhen Zhang, Cui Li, Lisha Hu, Haiyan Wang
Ruditapes aspera is a member of the family Veneridae, the venus clams. This species is morphologically similar to other two globally economically important Ruditapes species, R. decussatus and R. philippinarum. Recent phylogenetic studies of Veneridae based on short DNA sequences have suggested that these species may be less closely related than originally thought. Relationships among species of Ruditapes
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Low abundance but high land snail diversity in montane rainforest on the western slope of the Andes in Ecuador J. Molluscan Stud. (IF 1.2) Pub Date : 2022-01-10 Maria Camila Ramirez Perez, Bernhard Hausdorf
We investigated the land snail fauna along an altitudinal transect in the Los Cedros Biological Reserve on the western slope of the Andes in Ecuador. A total of 510 individuals were collected in 40 plots between c. 1,100 and 2,000 m a.s.l. and assigned to 80 land snail species. The mean iChao1 estimate of species richness was with 109 species (with a 95% confidence interval from 97 to 130 species)
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The shell phenotypic variability of the keyhole limpet Fissurella latimarginata: insights from an experimental approach using a water flow flume J. Molluscan Stud. (IF 1.2) Pub Date : 2021-11-20 Joana Vasconcelos, Diego Caamaño, Víctor M Tuset, Ricardo Sousa, Rodrigo Riera
Hydrodynamics are a major environmental factor on intertidal rocky shores. Morphological responses to this factor are expected to strongly influence spatial distribution of species across environmental gradients. We here analysed the shell phenotypic variability of the limpet Fissurella latimarginata using geometric morphometric analysis. The limpets were obtained from a sheltered intertidal coastal
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Plant diets of land snail community members are similar in composition but differ in richness J. Molluscan Stud. (IF 1.2) Pub Date : 2021-11-17 Kasper P Hendriks, Karen Bisschop, James C Kavanagh, Hylke H Kortenbosch, Anaïs E A Larue, Dries Bonte, Elza J Duijm, Joana Falcão Salles, Francisco J Richter Mendoza, Menno Schilthuizen, Rampal S Etienne
Herbivore diets are often generalistic, and communities of herbivores tend to share much of their diets. In the tropical lowlands of Malaysian Borneo, tens of different noncarnivorous land snail species are able to coexist in communities on limestone outcrops. We tried to answer the question whether diet differentiation plays a role in their coexistence. We show, with a large metabarcoding study of
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Assessment of spatiotemporal variability of giant clam populations (Cardiidae: Tridacna) from 11 years of monitoring at Koh Tao, Thailand J. Molluscan Stud. (IF 1.2) Pub Date : 2021-11-09 Rahul Mehrotra, Alyssa Allchurch, Coline Monchanin, Chad M Scott
Giant clams (Tridacninae) are an ecologically important species in coral reef habitats across the Indo-Pacific. Numerous examples of giant clam population declines of varying degrees of severity have been documented since the 1970s. These have been attributed to several reasons, such as overexploitation in regional fisheries and ornamental trades, extreme weather events and anomalous marine warming
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Solving the identity of the common shallow-water octopus of the Colombian Caribbean based on the analysis of mitochondrial DNA sequence data J. Molluscan Stud. (IF 1.2) Pub Date : 2021-11-02 Alejandra Puentes-Sayo, Javier Torres-Rodríguez, Orlando Lecompte
The specific identity of the common octopus fished along the Colombian Caribbean was studied based on 58 specimens collected from artisanal fishing in five localities (Providencia, San Andrés, Santa Marta, Cartagena and Isla Fuerte). A molecular systematic analysis of the mitochondrial genes 16S ribosomal RNA and cytochrome c oxidase subunit III was carried out, along with a reanalysis of data for
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Integrating morphological and genetic data at different climate and geographic scales in an endangered freshwater mussel Unio durieui (Bivalvia: Unionidae) endemic to northern Tunisia J. Molluscan Stud. (IF 1.2) Pub Date : 2021-10-26 Chiheb Fassatoui, Anne Chenuil, Mohamed Salah Romdhane
The freshwater mussel Unio durieui is a rare bivalve endemic to North African watersheds. Although this is an important species from an ecological and conservation perspective, information on its genetic diversity and population structure is lacking. Here, we combine geometric morphometric and molecular genetic analyses to characterize and evaluate the status of populations of this endangered species
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Trophic ecology of the Hubb's octopus Octopus hubbsorum (Cephalopoda: Octopodidae) in the central Mexican Pacific J. Molluscan Stud. (IF 1.2) Pub Date : 2021-10-02 Martín Serrano-Tadeo, Juan Ramón Flores-Ortega, Enrique Godínez-Domínguez, Jasmín Granados-Amores, Oscar Iram Zavala-Leal, Andrés Granados-Amores
The diet of the Hubb's octopus Octopus hubbsorum along the coast of Acapulco, Guerrero, Mexico, was determined by analysing the stomach contents of 413 individuals collected monthly between February 2017 and March 2018. Most stomachs (74.3%) presented contents, while 25.7% were empty. Sixty prey items were identified and grouped into 16 categories. The most frequent prey items were Petrolisthes sanfelipensis
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Behavioural responses of Anodonta anatina and Unio pictorum to temperature and algal concentration J. Molluscan Stud. (IF 1.2) Pub Date : 2021-09-30 Charitos Zapitis, Maren Huck, Aradhana Mehra, Mark T Bulling, Andrew Ramsey
Using time-lapse photography in a laboratory setting, we exposed Anodonta anatina and Unio pictorum for 4 h to algal (Chlorella vulgaris) concentrations ranging from 0.5 to 20.0 mg ash-free dry mass l−1 and to three different temperatures (11 ± 1, 15 ± 1 and 19 ± 1 °C). We analysed the proportion of mussels in locomotion, duration of locomotory activities, posterior tip movement and valve opening behaviour
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Range limits and thermal physiological adaptation of intertidal limpets belonging to the genus Nipponacmea J. Molluscan Stud. (IF 1.2) Pub Date : 2021-09-20 Shan-shan Yu, Yun-wei Dong, Qing-lin Wang
Nipponacmea fuscoviridis and N. radula are common intertidal species along China's coast and are characterized by divergent biogeographic patterns. In order to understand the effects of thermal stress on the distribution of these rocky shore species, the upper thermal limits and thermal safety margins of these two species were determined and compared. Thermal tolerance of the southern species N. fuscoviridis
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First record of cleaning event between a mating octopus (Octopus insularis) and a barber goby (Elacatinus figaro) J. Molluscan Stud. (IF 1.2) Pub Date : 2021-09-16 Guabiroba H, Joyeux J.
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New observations on the corallivorous nudibranch Phestilla melanobrachia: morphology, dietary spectrum and early development J. Molluscan Stud. (IF 1.2) Pub Date : 2021-09-11 Sam King Fung Yiu, Sheena Suet-Wah Chung, Jian-Wen Qiu
Phestilla melanobrachia is a coral-eating nudibranch widely distributed in the tropical Pacific. Previous studies have revealed only two colour morphs of P. melanobrachia, an orange form preying on various orange Dendrophyllia and Tubastraea spp. and a dark green form preying on the black Tubastraea micrantha and Tubastraea diaphana. Both colour morphs live in relatively deep waters (15–25 m) of exposed
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Light and shade of citizen science for less charismatic invertebrate groups: quality assessment of iNaturalist nonmarine mollusc observations in central Italy J. Molluscan Stud. (IF 1.2) Pub Date : 2021-09-08 Debora Barbato, Andrea Benocci, Mirko Guasconi, Giuseppe Manganelli
Citizen science has grown in importance in recent years: many projects have been launched and records are being collected on an unprecedented scale. However, certain less charismatic invertebrate groups are still underreported and the accuracy and quality of their records in crowd-sourced citizen-science projects have rarely been investigated. Here, we used expert review to conduct quality control
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Host attraction behaviour: the red exhalent aperture extension of the Neotropical freshwater mussel Castalia ambigua J. Molluscan Stud. (IF 1.2) Pub Date : 2021-09-03 Rogério C L Santos, Anderson Wakinaguni Michiura, Cláudia Tasso Callil
Conselho Nacional de Desenvolvimento Científico e Tecnológico10.13039/501100003593400357/2014-3Fundação de Amparo a Pesquisa do Estado de Mato Grosso0586311/2016
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Erratum J. Molluscan Stud. (IF 1.2) Pub Date : 2021-09-03
Errors in pagination were noted in the articles listed below. This erratum details the corrections made since these articles were published online:
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Aestivation duration and plasticity in the rocky-shore littorinid snail, Echinolittorina malaccana J. Molluscan Stud. (IF 1.2) Pub Date : 2021-09-01 David J Marshall,Siddiq Sahminan,Graeme Christie