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Comparative morphology of scorpion metasomata: Muscles and cuticle Arthropod Struct. Dev. (IF 1.836) Pub Date : 2021-01-11 Alice Günther; Lionel Monod; Christian S. Wirkner
Scorpions are among the most popular research objects within Arachnida and there is an impressive body of knowledge about their biology, distribution, morphology, etc. Although the poison sting has gained a lot of attention due to its potential lethal effects to humans, hitherto, there has been no comparative morphological study on the metasoma, the body part that delivers the poisonous injection.
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Dorsal setae in Raoiella (Acari: Tenuipalpidae): Their functional morphology and implication in fluid secretion Arthropod Struct. Dev. (IF 1.836) Pub Date : 2021-01-02 Antonella Di Palma; Jenifer J. Beard; Gary R. Bauchan; Ronald Ochoa; Owen D. Seeman; Elliot W. Kitajima
The setae of mites are not regarded as secretory structures, yet in the flat mite genus Raoiella, each developmental stage presents droplets of fluid associated with the tips of their dorsal setae. To understand the origin of this fluid, the ultrastructure of the dorsal setae is investigated in females of Raoiella bauchani Beard & Ochoa and the invasive pest species Raoiella indica Hirst using scanning
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More than one way to smell ashore – Evolution of the olfactory pathway in terrestrial malacostracan crustaceans Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-12-29 Jakob Krieger; Marie K. Hörnig; Matthes Kenning; Bill S. Hansson; Steffen Harzsch
Crustaceans provide a fascinating opportunity for studying adaptations to a terrestrial lifestyle because within this group, the conquest of land has occurred at least ten times convergently. The evolutionary transition from water to land demands various morphological and physiological adaptations of tissues and organs including the sensory and nervous system. In this review, we aim to compare the
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Outsourcing a visual neuropil – The central visual system of the median eyes of Galeodes granti Pocock, 1903 (Arachnida: Solifugae) Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-12-28 Tobias Lehmann; Roland R. Melzer
Only a few studies have examined the central visual system of Solifugae until now. To get new insights suitable for phylogenetic analysis we studied the R-cell (or retinula cell) projections and visual neuropils of Galeodes granti using various methods. G. granti possesses large median eyes and rudimentary lateral eyes. In this study, only the R-cells and neuropils of the median eyes were successfully
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Coupling wings with movable hooks – resilin in the wing-interlocking structures of honeybees Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-12-25 Jan Michels; Esther Appel; Stanislav N. Gorb
Hymenoptera are characterised by the presence of one forewing pair and one hindwing pair. The two wings of each body side are coupled to each other during flight making the morphologically four-winged insects functionally two-winged. This coupling is formed by a row of hook-like structures, called hamuli, that are located at the leading edge of the hindwing and interlock with a thickened and recurved
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Visual system characterization of the obligate bat ectoparasite Trichobius frequens (Diptera: Streblidae) Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-12-16 Megan L. Porter; Thomas W. Cronin; Carl W. Dick; Noah Simon; Katharina Dittmar
As an obligate ectoparasite of bats, the bat fly Trichobius frequens (Diptera: Streblidae) inhabits the same subterranean environment as their nocturnal bat hosts. In this study, we characterize the macromorphology, optical architecture, rhabdom anatomy, photoreceptor absorbance, and opsin expression of the significantly reduced visual system in T. frequens resulting from evolution in the dark. The
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Egg structure of five antarctoperlarian stoneflies (Insecta: Plecoptera, Antarctoperlaria) Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-12-12 Shodo Mtow; Brian J. Smith; Ryuichiro Machida
The egg structures of five antarctoperlarian species – Stenoperla prasina of Eustheniidae; Austroperla cyrene of Austroperlidae; and Zelandobius truncus, Megaleptoperla grandis, and Acroperla trivacuata of Gripopterygidae, were examined in detail, and the groundplan of the egg structure was considered within the representative lineages of Antarctoperlaria and Plecoptera. The flattened egg shape and
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Specialised rootlets of Sacculina pilosella (Rhizocephala: Sacculinidae) used for interactions with its host's nervous system Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-12-08 Anastasia D. Lianguzova; Stanislav A. Ilyutkin; Olga M. Korn; Aleksei A. Miroliubov
Parasitic rhizocephalan barnacles induce morphological, physiological, and behavioural changes in their hosts. The mechanisms of these intimate host-parasite interactions remain unknown. We have shown previously that rootlets of the internae of Peltogasterella gracilis and Peltogaster paguri penetrate the ganglion's envelope of their hermit crab hosts and form specialised structures in the ganglion
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Crucial role of framework with cytoskeletal actin filaments for shaping microstructure of footpad setae in the ladybird beetle, Harmonia axyridis Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-11-26 Ken-ichi Kimura; Naoe Hosoda
Insects that can walk on smooth surfaces have specialized structures, footpads, on their legs. Footpads play an important role in adhesion to the substrate surface. Although the morphology and function of footpads have been studied, the mechanism of their formation is still elusive. In the ladybird beetle (Harmonia axyridis), hairy footpads are present on the first and second tarsal segments of the
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The tracheal system of scutigeromorph centipedes and the evolution of respiratory systems of myriapods Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-11-24 Gero Hilken; Jörg Rosenberg; Gregory D. Edgecombe; Valentin Blüml; Jörg U. Hammel; Anja Hasenberg; Andy Sombke
The tracheal system of scutigeromorph centipedes (Chilopoda) is special, as it consists of dorsally arranged unpaired spiracles. In this study, we investigate the tracheal systems of five different scutigeromorph species. They are strikingly similar to each other but depict unique characters compared to the tracheal systems of pleurostigmophoran centipedes, which has engendered an ongoing debate over
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Morphology and ultrastructure of the spermatozoa of Lonchoptera lutea Panzer, 1809 (Diptera: Lonchopteridae) Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-11-20 Marion Kotrba; Michael Tröster; Heidemarie Gensler; Bernhard Ruthensteiner; Martin Heß
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Metamorphosis of the central nervous system of Trichogramma telengai (Hymenoptera: Trichogrammatidae) Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-11-16 Anastasia A. Makarova; Egor N. Veko; Alexey A. Polilov
During metamorphosis, the insect CNS undergoes both structural and allometric changes. Due to their extreme de-embryonization and parasitism, the formation of the CNS in egg parasitoids occurs at the late larval stage. Our study provides the first data on the morphological and volumetric changes of the CNS occurring during the pupal development of the parasitic wasp Trichogramma telengai Sorokina,
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Surf and turf vision: Patterns and predictors of visual acuity in compound eye evolution Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-11-13 Kathryn D. Feller; Camilla R. Sharkey; Alyssa McDuffee-Altekruse; Heather D. Bracken-Grissom; Nathan P. Lord; Megan L. Porter; Lorian E. Schweikert
Eyes have the flexibility to evolve to meet the ecological demands of their users. Relative to camera-type eyes, the fundamental limits of optical diffraction in arthropod compound eyes restrict the ability to resolve fine detail (visual acuity) to much lower degrees. We tested the capacity of several ecological factors to predict arthropod visual acuity, while simultaneously controlling for shared
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Morphology of sting apparatus of Chrysidoidea (Hymenoptera, Aculeata) Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-10-26 Diego N. Barbosa; Lars Vilhelmsen; Celso O. Azevedo
The main synapomorphy for Aculeata is the sting apparatus, which allows the female to envenom potential prey or hosts. The sting is the modified ovipositor which is not used for laying eggs anymore. Here, we explore the morphology of the sting apparatus within the families of Chrysidoidea. 27 skeletal structures were recognized, including three (dp1vf, dorsal projection of first valvifer; ppa, projection
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Coevolution between female seminal receptacle and sperm morphology in the semiaquatic measurer bug Hydrometra stagnorum L. (Heteroptera, Hydrometridae) Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-10-26 Romano Dallai; Pietro Paolo Fanciulli; David Mercati; Pietro Lupetti
The coevolution between sperm length and size of the female sperm-storage organs is described for the first time within Heteroptera. The long sperm of the measurer bug Hydrometra stagnorum is characterized by the unusually long acrosome with its anterior region helically arranged, and by a very short nucleus. The sperm flagellum has a 9 + 9+2 conventional axoneme and crystallized mitochondrial derivatives
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Anatomy and histology of the alimentary canal of larvae and adults of Chrysoperla externa (Hagen, 1861) (Neuroptera: Chrysopidae) Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-10-30 Priscylla Costa Dantas; José Eduardo Serrão; Helen Cristina Pinto Santos; Geraldo Andrade Carvalho
The larvae of the lacewing Chrysoperla externa are important predators with the potential to be used in the biological control in agriculture. Although some studies provide important data on the gut morphology in lacewings, they are limited to few species. This study describes the anatomy and histology of the alimentary canal in the predatory larvae and herbivorous adult of C. externa. In larvae, the
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Mouthpart sensory structures of the human head louse Pediculus humanus capitis Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-10-16 Isabel Ortega-Insaurralde; María Inés Picollo; Romina B. Barrozo
Head lice are exclusive human parasitic blood-sucking insects. Distributed worldwide among school-age children, this parasitosis generates scalp irritation and sometimes social prejudice. Understanding how head lice detect and perceive their human hosts is crucial to control transmission. Here, we describe the sensory structures present on the mouthparts of Pediculus humanus capitis and their possible
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Why “swimming crabs” are able to swim – The importance of the axial skeleton: A comparison between the “swimming crab” Liocarcinus depurator and two other brachyuran crabs (Cancer pagurus, Carcinus maenas) using μCT and 3D-reconstruction Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-10-09 Dennis Hazerli; Stefan Richter
Most brachyuran crabs use their pereiopods as walking legs, but there are also a number of species, in which the last (5th) pair of pereiopods (P5) are specialized to permit a unique mode of swimming. One of these P5-swimming crabs is Liocarcinus depurator, commonly found on European shores. We present 3-dimensional μCT-based reconstructions of the axial skeletons and 5th pereiopods (P5), including
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Arachnid monophyly: Morphological, palaeontological and molecular support for a single terrestrialization within Chelicerata Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-10-09 Richard J. Howard; Mark N. Puttick; Gregory D. Edgecombe; Jesus Lozano-Fernandez
The majority of extant arachnids are terrestrial, but other chelicerates are generally aquatic, including horseshoe crabs, sea spiders, and the extinct eurypterids. It is necessary to determine whether arachnids are exclusively descended from a single common ancestor (monophyly), because only that relationship is compatible with one land colonisation in chelicerate evolutionary history. Some studies
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Prevalence of leg regeneration in damselflies reevaluated: A case study in Coenagrionidae Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-09-23 Natalie A. Saxton; Gareth S. Powell; Seth M. Bybee
The leg regeneration capabilities of damselflies are understudied. Here we present the first data of regenerated limbs across a genus of damselfly based on adult specimens collected in the field to illustrate the prevalence of limb loss among nymphs. We show that this phenomenon is much more prevalent than previously thought, as 42 percent of individuals were found with regenerated limbs. Furthermore
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Linear and geometric morphometric analyses of variation of the plectrum in four species of bess beetles, tribe Proculini (Coleoptera: Passalidae). Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-09-19 E R Ariza-Marín,E De Luna
Bess beetles are sapro-xillophagous insects that inhabit decaying logs. They display sub-social behavior and acoustic communication. Adults produce sounds with an abdomino-alary stridulatory system. The sixth abdominal tergum has lateral protuberances with spines (pars stridens), whereas the hind wings have spines in the radial cell (plectrum). The potential taxonomic utility of these spines has not
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Eocarcinus praecursor Withers, 1932 (Malacostraca, Decapoda, Meiura) is a stem group brachyuran. Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-09-03 Gerhard Scholtz
Beginning with the description by Withers in 1932, Eocarcinus praecursor from the Jurassic has long been considered the oldest representative of the Brachyura. In 2010 Feldmann and Schweitzer re-investigated the specimens of E. praecursor and expressed doubts about the brachyuran nature of this species. Among other characters, the suspected existence of small chelae in the 2nd or 3rd pereopods led
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New findings on the functional morphology of the male genitalia of the blood-feeding bug Rhodnius prolixus in the light of a different observation on living tissue. Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-09-03 R Gary Chiang
Among insect species, the male genitalia evolved many different anatomical features to ensure reproductive success. Males of primitive insects do not copulate but transfer sperm packaged in a spermatophore to the female, whereas males of the most advanced insects copulate and deliver free sperm to the storage organ, the spermatheca, in the female reproductive tract. Based on previous studies on several
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The male reproductive accessory glands of the blister beetle Meloe proscarabaeus Linnaeus, 1758 (Coleoptera: Meloidae): Anatomy and ultrastructure of the cantharidin-storing organs. Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-08-20 Maurizio Muzzi,Andrea Di Giulio,Emiliano Mancini,Emiliano Fratini,Manuela Cervelli,Tecla Gasperi,Paolo Mariottini,Tiziana Persichini,Marco Alberto Bologna
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Glandular innovations for a tunnelling life: Silk and associated leg glands in Melissotarsus and Rhopalomastix queen and worker ants. Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-08-17 Johan Billen,Christian Peeters
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Novel exocrine glands in the foreleg coxae of Discothyrea ants. Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-08-17 Johan Billen,Chung-Chi Lin,Flavia A Esteves
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The sperm ultrastructure of the click beetles (Elateridae) and related groups (Buprestidae and Lampyridae). Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-08-17 Glenda Dias,José Lino-Neto,Romano Dallai,David Mercati,Pietro Lupetti
In the present study, we describe the sperm morphology of 11 species of Elateriformia (9 elaterids, 1 lampyrid and 1 buprestid) using transmission electron microscopy. All species exhibited sperm that is not usually observed in insects in general. The most highlighted features are the displacement of the nucleus running parallel to the flagellar components, hitherto observed only in coccinellid and
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Evidence for a thoracic crop in the workers of some Neotropical Pheidole species (Formicidae: Myrmicinae). Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-08-17 A Casadei-Ferreira,G Fischer,E P Economo
The ability of ant colonies to transport, store, and distribute food resources through trophallaxis is a key advantage of social life. Nonetheless, how the structure of the digestive system has adapted across the ant phylogeny to facilitate these abilities is still not well understood. The crop and proventriculus, structures in the ant foregut (stomodeum), have received most attention for their roles
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Visual metamorphoses in insects and malacostracans: Transitions between an aquatic and terrestrial life. Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-08-18 Alice Chou,Chan Lin,Thomas W Cronin
Arthropods operate in an outrageous diversity of environments. From the deep sea to dense tropical forests, to wide open arctic tundra, they have colonized almost every possible habitat. Within these environments, the presence of light is nearly ubiquitous, varying in intensity, wavelength, and polarization. Light provides critical information about the environment, such as time of day or where food
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Wax glands of the horned gall aphid, Schlechtendalia chinensis, at different stages. Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-08-10 Hongyuan Wei,Johan Billen,Ying Yang,Ping Liu,Shuxia Shao,Xiaoming Chen,Zixiang Yang
The horned gall aphid, Schlechtendalia chinensis, inhabits the productive species of Chinese gallnuts, which have economic value. Aphid wax glands are crucial for the survival of the insects, since the secreted waterproofing wax is important to protect the aphids from predators, pathogens and honeydew contamination. In this study, we investigated the structure of wax glands and their role in different
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Ultrastructure of the intestinal system in unfed larvae of Limnesia maculata (O.F. Müller, 1776) (Acariformes, Limnesiidae). Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-08-08 Andrey B Shatrov,Elena V Soldatenko
The intestinal system of unfed fresh-water mite larvae Limnesia maculata (O.F. Müller, 1776) (Acariformes, Limnesiidae) has been studied with transmission electron microscopy. The intestinal system is composed of the foregut, including the pharynx and the esophagus, the sac-like blind midgut and the excretory organ. The pharynx begins with the mouth covered by the labrum. The pharynx runs along the
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An in-depth description of head morphology and mouthparts in larvae of the black soldier fly Hermetia illucens. Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-08-05 Daniele Bruno,Teresa Bonacci,Marcella Reguzzoni,Morena Casartelli,Annalisa Grimaldi,Gianluca Tettamanti,Pietro Brandmayr
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Anatomical and ultrastructural analysis of the posterior optic tubercle in the locust Schistocerca gregaria. Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-08-02 Martina Held,Kim Le,Uta Pegel,Florian Dersch,M Jerome Beetz,Keram Pfeiffer,Uwe Homberg
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Myology of juvenile freshwater prawn Macrobrachium amazonicum (Decapoda, Caridea): Morphology and swimming implication. Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-07-31 Thalles Fernando Rocha Ruiz,Gabriel Vieira Martins Rezende Gois,João Candido Rodrigues Rocha,Mateus Rossetto Vidal,Mario Vitor Buzete Gardinal,Carlos Alberto Vicentini,Irene Bastos Franceschini Vicentini
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Gradients in mechanotransduction of force and body weight in insects. Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-07-20 Christian M Harris,Gesa F Dinges,Anna Haberkorn,Corinna Gebehart,Ansgar Büschges,Sasha N Zill
Posture and walking require support of the body weight, which is thought to be detected by sensory receptors in the legs. Specificity in sensory encoding occurs through the numerical distribution, size and response range of sense organs. We have studied campaniform sensilla, receptors that detect forces as strains in the insect exoskeleton. The sites of mechanotransduction (cuticular caps) were imaged
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The origin of microscopic spheres on the exoskeleton of the woodlouse Porcellionides pruinosus (Crustacea: Isopoda) and their effect on its hydrophobicity. Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-07-05 Miloš Vittori,Ivana Gantar
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Structure and function of the stylets of hematophagous Triatominae (Hemiptera: Reduviidae), with special reference to Dipetalogaster maxima. Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-06-12 Tatjana Tull,Fabian Henn,Oliver Betz,Benjamin Eggs
Kissing bugs (Hemiptera: Reduviidae: Triatominae) are able to bend their rod-like maxillae while searching for blood vessels in the tissue of their vertebrate hosts. Little is known about the working mechanisms of these bending movements and the distal opening of the food channel. We compared the morphological structure of the stylets (mandibles and maxillae) of four triatomine species and analyzed
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First description of male genital sclerites and associated musculature for two members of Coniopterygidae (Insecta: Neuropterida: Neuroptera) based on X-ray microCT imaging. Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-06-05 Stephan Handschuh,Ulrike Aspöck
Coniopterygidae are the dwarfs among the Neuroptera. Despite their miniaturisation, the males are equipped with genital sclerites that are excessively heterogeneous. They function in copulation and sperm transfer and have been widely utilized for species identification, as well being considered of high phylogenetic relevance. The present study is the first to describe the musculature associated with
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How many scales on the wings? A case study based on Colias crocea (Geoffroy, 1785) (Hexapoda: Lepidoptera, Pieridae). Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-06-05 Albert Masó,Javier Romero,Joaquín Baixeras
The covering by scales of the wings of Lepidoptera contributes to multiple functions that are critical for their survival and reproduction. In order to gain a better understanding about their distribution, we have exhaustively studied 4 specimens of Colias crocef (Geoffroy, 1785). We have quantified the sources of variability affecting scale density. The results indicate that the scale covering of
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Life after the mother's hug: Late post-embryonic development of Cryptops parisi (Chilopoda: Scolopendromorpha: Cryptopidae). Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-05-13 Dalibor Z Stojanović,Vukica D Vujić,Luka R Lučić,Vladimir T Tomić,Slobodan E Makarov,Bojan M Mitić
Here we describe in detail the late post-embryonic development of the common European scolopendromorph centipede Cryptops parisi. Canonical variate analyses of two groups of external morphological characters, viz., cephalic capsule characters (head length, length of the anterior and posterior paramedian cephalic sutures) and coxopleuron surface characters (number of pores in the coxal pore-field, number
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Comparative morphology of clasping structures in predator stink bugs (Hemiptera: Pentatomidae: Asopinae): Insights into their function and evolution. Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-05-15 Talita Roell,Bruno C Genevcius,Luiz A Campos
Parameres are male genital structures found in many insects which are often used as clasping devices to exert dominance in copula. The asopines have evolved a remarkable additional pair of similar structures, often denominated processes, which combines with the parameres in a tweezers-like system. Processes in similar positions have also been found in other subfamilies of Pentatomidae, but smaller
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Antennal morphology and sensillar equipment vary with pollen diet specialization in Andrena bees. Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-05-12 Carlo Polidori,Alberto Jorge,Concepción Ornosa
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External morphology of the abdominal glands in Asopinae (Hemiptera: Heteroptera: Pentatomidae). Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-05-05 Talita Roell,Filipe Michels Bianchi,Ana Paula Leite Kochenborger,Luiz Alexandre Campos
Heteropterans communicate chemically through thoracic or abdominal glandular complexes. The dorso-abdominal scent glands (DAGs) are externalized by cuticular specialized structures forming the external scent efferent system (SES). Different groups in Heteroptera present other glands, such as the Asopinae (Pentatomidae), whose males can have ventral abdominal pheromonal glands externalized by cuticular
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The endoparasitic larval stages of Eoxenos laboulbenei: An atypical holometabolan development (Strepsiptera, Mengenillidae). Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-05-03 Daniel Tröger,Veit Grabe,Rolf G Beutel,Hans Pohl
Endoparasitic larval stages of Eoxenos laboulbenei were documented with different techniques, with a main focus on the male tertiary larva. Two discrete endoparasitic stages occur, the secondary and the tertiary larva. The presence of large compound eyes and externally visible wing buds in the tertiary larva is a unique feature within Holometabola. The brain with large optic lobes is followed by a
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Male postabdomen reveals ancestral traits of Megasecoptera among winged insects. Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-04-30 Jakub Prokop,Martina Pecharová,Nina D Sinitshenkova,Klaus-Dieter Klass
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Temperature fluctuations during embryonic development implicated in a naturally occurring instance of abnormal spinnerets in the spider Australomimetus maculosus (Araneae, Mimetidae). Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-04-29 Mark A Townley,Danilo Harms
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Anatomical specializations of the gizzard in soil-feeding termites (Termitidae, Apicotermitinae): Taxonomical and functional implications. Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-04-18 Johanna Romero Arias,Clément Chevalier,Yves Roisin
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Revealing male genital morphology in the giant ant genus Dinoponera with geometric morphometrics. Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-04-18 Leonardo Tozetto,John E Lattke
Genitalia include some of the most complex and morphologically diverse structures in insects, finding extensive use in taxonomy, but ant taxonomy is female biased and knowledge of the males is little explored, potentially depriving ant taxonomy of valuable information. We examine the male genital morphology of six species of Dinoponera and the variation among species and within species is described
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Early postembryogenic development of the subgenual organ complex in the stick insect Sipyloidea sipylus. Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-04-04 Johannes Strauß
Stick insects have elaborate mechanosensory organs in their subgenual organ complex in the proximal tibia, particularly the distal organ with scolopidial sensilla in linear arrangement. For early postembryonic developmental stages of Sipyloidea sipylus (Phasmatodea: Necrosciinae), the neuroanatomy of the scolopidial organs in the subgenual organ complex and the campaniform sensilla is documented by
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Evolutionary trends of digestion and absorption in the major insect orders. Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-03-20 Walter R Terra,Clelia Ferreira
The spatial organization of digestion, which corresponds to the steps by which the ingested food is hydrolyzed in the different regions of the gut, was described in insects from the major insect orders. The pattern of digestion and absorption in the midgut shows a strong phylogenetic influence, modulated by adaptation to particular feeding habits. Based on this, basic digestive patterns were recognized
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The ecology of marine colonization by terrestrial arthropods. Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-03-19 Geerat J Vermeij
Terrestrial arthropods often colonized and became important in freshwater ecosystems, but did so less often and with little consequence in marine habitats. This pattern cannot be explained by the physical properties of water alone or by limitations of the terrestrial arthropod body plan alone. One hypothesis is that transitions among terrestrial, aquatic and marine ecosystems are unlikely when well-adapted
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On the morphology of the Late Paleozoic insect families Bardohymenidae and Aspidothoracidae (Palaeodictyopterida: Megasecoptera). Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-03-13 Martina Pecharová,Nina D Sinitshenkova,Jakub Prokop
Megasecoptera is a late Paleozoic order of herbivorous insects with rostrum-like mouthparts and slender homonomous outstretched wings. Our knowledge of their morphology is mainly based on wings while other body parts are scarcely documented. Here we focus on the families Bardohymenidae and Aspidothoracidae. A new well preserved specimen of Sylvohymen cf. sibiricus is described and illustrated, particularly
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Vasa deferentia and associated structures of the male Panorpodes kuandianensis (Mecoptera: Panorpodidae). Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-03-13 Yuan Hua,Bei-Bei Zhang,Ying Miao,Bao-Zhen Hua,Shi-Heng Tao
The male reproductive system may provide significant evidence for the taxonomic and phylogenetic analyses of insects. However, current knowledge of the male reproductive system in Mecoptera is mainly concentrated on the external genitalia, and is rarely involved in the internal reproductive system. Here, we investigated the morphology and the fine structure of the vasa deferentia and associated structures
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On the morphology and evolution of cicadomorphan tymbal organs. Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-02-27 Leonidas-Romanos Davranoglou,Beth Mortimer,Graham K Taylor,Igor Malenovský
Cicadas and many of their relatives (Hemiptera: Cicadomorpha) generate vibroacoustic signals using tymbal organs located on their first two abdominal segments. Although tymbals are well-studied in Cicadidae, their systematic distribution in other Cicadomorpha and their possible homologies to the vibroacoustic mechanisms of other Hemiptera have been debated for more than a century. In the present study
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Sperm ultrastructure of three species of ladybirds (Coleoptera, Coccinellidae). Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-02-27 Glenda Dias,Josè Lino-Neto,Romano Dallai,David Mercati,Pietro Lupetti
The sperm of three coccinellid species belonging to the subfamilies Chilocorinae, Coccinellinae and Epilachninae were studied under light and transmission electron microscopy. The basic sperm structure of these ladybirds is common to that of the other previously studied species, especially the acrosome in front of the basal body and not the nucleus, with this latter running parallel with the flagellar
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From lanceolate to plate-like: Gross morphology, terminology, and evolutionary trends of the trichophoran ovipositor. Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-02-19 Yanyan Zhou,Dávid Rédei
The ovipositor morphology of Trichophora (Hemiptera: Heteroptera) is revisited. Skeletomuscular structure of the ovipositor of selected species and outgroups is documented. Homologies of the structures are established, different homology hypotheses of previous authors are discussed and rejected. The groundplan of the trichophoran ovipositor is reconstructed, apomorphic conditions of each part of the
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Reinterpretation of 'sperm pump' or 'sperm syringe' function with notes on other male internal reproductive organs in the Asian citrus psyllid, Diaphorina citri (Hemiptera: Liviidae). Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-02-12 Joseph M Cicero,Wayne B Hunter,Liliana M Cano,Surya Saha,Lukas A Mueller,Susan J Brown
Reproduction is a critical feature in the search for means to manage the Asian citrus psyllid, vector of a devastating bacterial pathogen of citrus. The importance of accuracy in functional, anatomical descriptions and interpretations for use by other disciplines, particularly molecular genetics, cannot be overstressed. The term 'sperm pump' was coined by classical authors on observational appearance
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Editorial. Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-02-11 Gerhard Scholtz,Barbara Beltz,Alexander Steinbrecht
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Genital morphology and the mechanics of copulation in the millipede genus Pseudopolydesmus (Diplopoda: Polydesmida: Polydesmidae). Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-01-28 Xavier J Zahnle,Petra Sierwald,Stephanie Ware,Jason E Bond
Mate choice, copulation, genital morphology, and sperm storage are not very well understood in millipedes. The use of three-dimensional x-ray computed tomography (μCT) provides new morphological data regarding millipede reproductive systems in both the female and male, including chitinous sclerites and membranes, muscles, glands, oviducts, and sperm conduits. Here we present a complete integrated account
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The brain and the corresponding sense organs in calanoid copepods - Evidence of vestiges of compound eyes. Arthropod Struct. Dev. (IF 1.836) Pub Date : 2020-01-25 Thomas Frase,Stefan Richter
Copepoda is one of the crustacean taxa with still unresolved phylogenetic relationships within Tetraconata. Recent phylogenomic studies place them close to Malacostraca and Cirripedia. Little is known about the morphological details of the copepod nervous system, and the available data are sometimes contradictory. We investigated several representatives of the subgroup Calanoida using immunohistochemical
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