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Structure of the oral tentacles of early ontogeny stage in brachiopod Hemithiris psittacea (Rhynchonelliformea, Rhynchonellida) J. Morphol. (IF 1.5) Pub Date : 2024-03-16 Tatyana Valerievna Kuzmina, Elena Nikolaevna Temereva
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Revision of the muscular system in the brachiopod Novocrania anomala using 3D reconstruction: Functional and paleontological significance J. Morphol. (IF 1.5) Pub Date : 2024-03-11 Feodor A. Plandin, Elena N. Temereva
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Comparative three‐dimensional jaw muscle anatomy of marsupial carnivores (Dasyurus spp.) and the termite‐eating numbat (Myrmecobius fasciatus) J. Morphol. (IF 1.5) Pub Date : 2024-03-05 Vanessa J. Thomas, Jeremy Shaw, Natasha Tay, Natalie M. Warburton
Among marsupials, the endangered numbat (Myrmecobius fasciatus) is the only obligate myrmecophage with a diet comprised strictly of termites. Like many other specialised myrmecophagous mammals, numbats have a gracile and highly specialised skull morphology with an elongated rostrum and small braincase. Myrmecobiidae is one of four taxonomic families within the Australasian marsupial order Dasyuromorphia
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The Crocodylian proatlas functions to redistribute venous blood and cerebrospinal fluid J. Morphol. (IF 1.5) Pub Date : 2024-03-01 Annelise Swords, Michael Cramberg, Seth Parker, Anchal Scott, Stephanie Sopko, Ethan Taylor, Bruce A. Young
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The effect of tessellation on stiffness in the hyoid arch of elasmobranchs J. Morphol. (IF 1.5) Pub Date : 2024-02-17 Cheryl Wilga, Elizabeth Dumont, Lara Ferry
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Morphology and distribution of sensilla on head appendages in the water beetle Hygrobia hermanni (Coleoptera: Adephaga: Hygrobiidae) J. Morphol. (IF 1.5) Pub Date : 2024-02-06 Muriel Jager, Walid Errais, Michaël Trichet, Michaël Manuel
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Morphology of ctenostome bryozoans: 7. Hislopia, Echinella and Timwoodiellina J. Morphol. (IF 1.5) Pub Date : 2024-02-01 Thomas Schwaha, Masato Hirose, Timothy S. Wood
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Morphology of the epididymal duct of the domestic pig (Sus scrofa domesticus) J. Morphol. (IF 1.5) Pub Date : 2024-01-18 Ferial Hassan, Wolfgang Holtz
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Cranial muscle architecture in wild boar: Does captivity drive ontogenetic trajectories? J. Morphol. (IF 1.5) Pub Date : 2024-01-15 Anthony Herrel, Yann Locatelli, Katia Ortiz, Jean-Christophe Theil, Raphaël Cornette, Thomas Cucchi
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Comparative anatomy of the spinneret musculature in cribellate and ecribellate spiders (Araneae) J. Morphol. (IF 1.5) Pub Date : 2024-01-11 Josefine Kreuz, Peter Michalik, Jonas O. Wolff
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Ontogenetic shifts in body form in the bull shark Carcharhinus leucas J. Morphol. (IF 1.5) Pub Date : 2024-01-10 Joel H. Gayford, Darren A. Whitehead, Sébastien Jaquemet
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Microanatomy and ultrastructure of the nervous system of adult Renicola parvicaudatus (Digenea: Renicolidae) J. Morphol. (IF 1.5) Pub Date : 2024-01-03 Sofia A. Denisova, Sergei V. Shchenkov, Vladimir V. Lebedenkov
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Are owls technically capable of making a full head turn? J. Morphol. (IF 1.5) Pub Date : 2023-12-26 Aleksandra A. Panyutina, Alexander N. Kuznetsov
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Lateral bone ridge expansion and internal tissue replacement for vertebral body growth in Pacific bluefin tuna Thunnus orientalis J. Morphol. (IF 1.5) Pub Date : 2023-12-21 Misaki Sakashita, Shigeru Kondo, Naoyuki Wada
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Epichordal vertebral column formation in Xenopus laevis J. Morphol. (IF 1.5) Pub Date : 2023-12-18 Yu Takahashi, Ryota Wakabayashi, Satoshi Kitajima, Hideho Uchiyama
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Sexual dimorphism in the proventriculus of the buff-tailed bumblebee Bombus terrestris (L. 1758) (Hymenoptera: Apidae) J. Morphol. (IF 1.5) Pub Date : 2023-12-16 Frederic Hüftlein, Sven Ritschar, Christian Laforsch
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Building a vertebra: Development of the amniote sclerotome J. Morphol. (IF 1.5) Pub Date : 2023-12-12 Margarethe Draga, Martin Scaal
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Serial block-face scanning electron microscopy of the tail tip of post-metamorphic amphioxus finds novel myomeres with odd shapes and unusually prominent sclerocoels J. Morphol. (IF 1.5) Pub Date : 2023-12-13 Nicholas D. Holland, Linda Z. Holland
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Morphological description of spontaneous pelvic fin loss in a neotropical cichlid fish J. Morphol. (IF 1.5) Pub Date : 2023-12-13 Nicolás Roberto Ehemann, Axel Meyer, Christopher Darrin Hulsey
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Morphology of the cornea and iris in the Australian lungfish Neoceratodus forsteri (Krefft 1870) (Dipnoi): Functional and evolutionary perspectives of transitioning from an aquatic to a terrestrial environment J. Morphol. (IF 1.5) Pub Date : 2023-12-13 Hermann Barry Collin, Julian Ratcliffe, Shaun P. Collin
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Tooth pattern, development, and replacement in the yellow catfish, Pelteobagrus fulvidraco J. Morphol. (IF 1.5) Pub Date : 2023-12-12 Rui Huang, Li Tang, Ruiqi Li, Yongfeng Li, Liping Zhan, Xiaofeng Huang
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The trabecular architecture of the popliteal sesamoid bone (cyamella) from a New Zealand white rabbit (Oryctolagus cuniculus) J. Morphol. (IF 1.5) Pub Date : 2023-11-29 Meir M. Barak
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First ultrastructural description of an apomictic opsiblastic egg in freshwater Gastrotricha J. Morphol. (IF 1.5) Pub Date : 2023-11-28 Thiago Q. Araujo, Simon King-Trudeau, Joanna VanDyke, Rick Hochberg
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Erratum to Reconstructing the subcephalic musculature in Pucapampella and Ichthyostega J. Morphol. (IF 1.5) Pub Date : 2023-11-20
Kuznetsov, A. N., & Kryukova, N. V. (2023). Reconstructing the subcephalic musculature in Pucapampella and Ichthyostega. Journal of Morphology, 284, e21648. https://doi.org/10.1002/jmor.21648 In the originally published version of this article the affiliation for Alexander N. Kuznetsov was wrong. The affiliation should have appeared as follows. Alexander N. Kuznetsov Independent Researcher Israel The
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Use of the intrusion angle to describe the radial orientation of local cardiomyocytes in the left ventricle J. Morphol. (IF 1.5) Pub Date : 2023-11-03 Shunli Wang, Zhaorui Li, Feng Yuan, François Varray
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Reconstructing the subcephalic musculature in Pucapampella and Ichthyostega J. Morphol. (IF 1.5) Pub Date : 2023-11-01 Alexander N. Kuznetsov, Nadezhda V. Kryukova
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Identifying and locating carotenoids in supra-orbital combs of male black grouse (Lyurus tetrix) using Raman and transmission electron microscopy: A histological study using rehydrated tissue samples J. Morphol. (IF 1.5) Pub Date : 2023-10-26 Jessica L. Dobson, Thomas W. Pike, Jose Gonzalez-Rodriguez, Carl D. Soulsbury
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Radial polarity in the first cranial neuromast of selected teleost fishes J. Morphol. (IF 1.5) Pub Date : 2023-10-19 Machiko Otsuka, Shoei Sugita, Daisuke Shimizu, Masato Aoyama, Masaru Matsuda
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Expression patterns of the transcription factors Fezf1, Fezf2, and Bcl11b in the olfactory organs of turtle embryos J. Morphol. (IF 1.5) Pub Date : 2023-10-19 Shoko Nakamuta, Hideki Noda, Hideaki Kato, Takuya Yokoyama, Yoshio Yamamoto, Nobuaki Nakamuta
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Really a “secondary gill under the skin”? Unveiling “dorsal vessels” in freshwater slugs (Mollusca, Panpulmonata, Acochlidimorpha) J. Morphol. (IF 1.5) Pub Date : 2023-10-18 Timea P. Neusser, Bastian Brenzinger, Michael Schrödl, Katharina M. Jörger
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The ultrastructural features of the infundibulum of the green iguana, Iguana iguana J. Morphol. (IF 1.5) Pub Date : 2023-10-08 Crissy-Ann Harrylal, Antoinette V. Lensink, Sunil K. Gupta, Tom A. Aire
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Vascularization inside the epidermis of Neotropical anurans (Nobleobatrachia) J. Morphol. (IF 1.5) Pub Date : 2023-10-08 Daiana P. Ferraro, María E. Pereyra, J. Sebastián Barrionuevo, Silvia Quinzio, Miriam C. Vera, Carlos Taboada, Julián Faivovich, Andrés E. Brunetti
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First description of buccopharyngeal anatomy in Pelodryadinae larvae: Morphological comparison and systematic implications (Anura: Hylidae: Pelodryadinae: Litoria rubella and Ranoidea caerulea) J. Morphol. (IF 1.5) Pub Date : 2023-10-08 Pedro Henrique dos Santos Dias
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Shape analysis of the preorbital bar in caviomorph rodents J. Morphol. (IF 1.5) Pub Date : 2023-10-04 Federico Becerra, Aldo I. Vassallo
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A fossil “Social Stomach”: Micro-CT imaging unearths first fossil record of ant proventriculi and comparative analysis with recent species J. Morphol. (IF 1.5) Pub Date : 2023-10-03 Dmitry Zharkov, Dmitry Dubovikoff
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Ontogenetic skull variation in a shovel-headed amphisbaenian species J. Morphol. (IF 1.5) Pub Date : 2023-09-21 Leandro dos S. L. Hohl, Concepción Azorit, Aldo I. Vassallo, Adrià Casinos, Alessandra S. Machado, Ricardo T. Lopes, Oscar Rocha-Barbosa
Leposternon microcephalum is a species belonging to the Amphisbaenia, a group of burrowing reptiles. Amphisbaenia present various morphological and physiological adaptations that allow them to penetrate the ground and live underground, through a system of galleries and permanent chambers that they build themselves. Among the morphological adaptations in this group, those of the skull stand out as it
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Predicting body mass in Ruminantia using postcranial measurements J. Morphol. (IF 1.5) Pub Date : 2023-09-14 Alexa N. Wimberly
Size plays an important role in mammalian ecology. Accurate prediction of body mass is therefore critical for inferring aspects of ecology in extinct mammals. The unique digestive physiology of extant ruminant artiodactyls, in particular, is suggested to place constraints on their body mass depending on the type of food resources available. Therefore, reliable body mass estimates could provide insight
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A geometric morphometric analysis of variation in Australian frog ilia and taxonomic interpretations J. Morphol. (IF 1.5) Pub Date : 2023-09-14 Roy M. Farman, Michael Archer, Suzanne J. Hand
Anurans including frogs and toads exhibit an ilium that is often regarded as taxonomically diagnostic. The ilium, one of the three paired bones that make up the pelvic girdle, has been important in the fossil record for identifying anuran morphotypes. Osteological collections for Australian frogs are rare in herpetological museums, and skeletonizing whole-bodied specimens requires destroying soft tissue
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Patterns description of hyperostosis observed in Atlantic moonfish Selene setapinnis and lookdown Selene vomer J. Morphol. (IF 1.5) Pub Date : 2023-09-08 Fernando A. P. Tuna, Flávia A. A. Calixto, Marcelline Luz, Eliana F. M. Mesquita
Hyperostosis manifests itself and develops differently in taxonomically related species. Radiographic images of individuals belonging to different size classes of Atlantic Moonfish Selene setapinnis and Lookdown Selene vomer were obtained from two different estuarine areas of Rio de Janeiro/Brazil. In S. setapinnis, hyperostosis occurred in 65.22% of the specimens analyzed in three different skeletal
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From zero to ossified: Larval skeletal ontogeny of the Neotropical Cichlid fish Cichlasoma dimerus J. Morphol. (IF 1.5) Pub Date : 2023-09-06 Agustina C. Beriotto, Paula G. Vissio, Enric Gisbert, Ignacio Fernández, Carlos A. Álvarez González, María P. Di Yorio, Julieta E. Sallemi, Daniela I. Pérez Sirkin
The identification of skeletal elements, the analysis of their developmental sequence, and the time of their appearance during larval development are essential to broaden the knowledge of each fish species and to recognize skeletal abnormalities that may affect further fish performance. Therefore, this study aimed to provide a general description of the development of the entire skeleton highlighting
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Anatomy of an agricultural antagonist: Feeding complex structure and function of three xylem sap-feeding insects illuminated with synchrotron-based 3D imaging J. Morphol. (IF 1.5) Pub Date : 2023-09-03 Elizabeth G. Clark, Daniele Cornara, Craig R. Brodersen, Andrew J. McElrone, Dilworth Y. Parkinson, Rodrigo P. P. Almeida
Many insects feed on xylem or phloem sap of vascular plants. Although physical damage to the plant is minimal, the process of insect feeding can transmit lethal viruses and bacterial pathogens. Disparities between insect-mediated pathogen transmission efficiency have been identified among xylem sap-feeding insects; however, the mechanistic drivers of these trends are unclear. Identifying and understanding
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A surrogate forelimb: Evolution, function and development of the avian cervical spine J. Morphol. (IF 1.5) Pub Date : 2023-08-30 Ryan D. Marek
The neck is a critical portion of the avian spine, one that works in tandem with the beak to act as a surrogate forelimb and allows birds to manipulate their surroundings despite the lack of a grasping capable hand. Birds display an incredible amount of diversity in neck morphology across multiple anatomical scales—from varying cervical counts down to intricate adaptations of individual vertebrae.
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Three-dimensional visualization of predatory gastropod feeding teeth with synchrotron scanning J. Morphol. (IF 1.5) Pub Date : 2023-08-27 Gregory S. Herbert, Stephen A. Hill, Maria Jose Pio, Ryan Carney, Amber Carlson, Elis Newham, Jen A. Bright
Several families of neogastropod mollusks independently evolved the ability to drill through mineralized prey skeletons using their own mineralized feeding teeth, sometimes with shell-softening chemical agents produced by an organ in the foot. Teeth with more durable tooth shapes should extend their use and improve predator performance, but past studies have described only the cusped-side of teeth
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Functional role of lacunar and muscular systems in the externa of Peltogasterella gracilis (Cirripedia: Rhizocephala) J. Morphol. (IF 1.5) Pub Date : 2023-08-22 Natalia A. Arbuzova, Anastasia D. Lianguzova, Stanislav A. Iliutkin, Ekaterina P. Laskova, Elizaveta R. Gafarova, Aleksei A. Miroliubov
One of the most conspicuous traits of parasitic organisms is a well-developed reproductive system. In Rhizocephala (“Crustacea”: Cirripedia) it is believed to be nested in the externa—a “reproductive part” located outside of the host. However, it is not clear how nutrients are transported to the externa. Several authors described a system of lacunae in the externa, and muscular contractions probably
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The histology and growth rate of Nile crocodile (Crocodylus niloticus) claws J. Morphol. (IF 1.5) Pub Date : 2023-08-22 Albert Myburgh, Jan Myburgh, Johan Steyl, Colleen T. Downs, Hannes Botha, Liam Robinson, Stephan Woodborne
The histology and growth of reptilian and crocodilian claws (ungues) have been extensively studied; however, Nile crocodile (Crocodylus niloticus) claws have not received adequate attention. Furthermore, age estimations for reptilian claws remain unexplored, despite Nile crocodile claws being used in long-term dietary reconstruction studies, assuming certain age-related patterns. In this study, we
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The roar of Rancho La Brea? Comparative anatomy of modern and fossil felid hyoid bones J. Morphol. (IF 1.5) Pub Date : 2023-08-20 Ashley R. Deutsch, R. Brian Langerhans, Deanna Flores, Adam Hartstone-Rose
Animal vocalization is broadly recognized as ecologically and evolutionarily important. In mammals, hyoid elements may influence vocalization repertoires because the hyoid apparatus anchors vocal tissues, and its morphology can be associated with variation in surrounding soft-tissue vocal anatomy. Thus, fossil hyoid morphology has the potential to shed light on vocalizations in extinct taxa. Yet, we
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Ontogenetic changes in southern sea otter (Enhydra lutris nereis) fur morphology J. Morphol. (IF 1.5) Pub Date : 2023-08-15 Kate Riordan, Annika E. Dean, Payton Adema, Nicole M. Thometz, Francesca I. Batac, Heather E. M. Liwanag
Many animals exhibit morphological changes across ontogeny associated with adaptations to their environment. Sea otters (Enhydra lutris) have the densest fur of any animal, which is composed of guard hairs, intermediate hairs, and underhairs. Sea otters live in cold water environments, and their fur traps a layer of air to remain properly insulated, due to morphological adaptations that allow the hairs
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Asymmetry in previtellogenic and early vitellogenic oocytes, ultrastructure of follicular cells and egg envelope in the pigmented sterlet, Acipenser ruthenus L. 1758 (Chondrostei, Acipenseriformes) J. Morphol. (IF 1.5) Pub Date : 2023-08-16 Monika Żelazowska, Martin Pšenička
Ovarian follicles of sterlets (Acipenser ruthenus) are composed of a single oocyte surrounded by follicular cells (FCs), basal lamina, and thecal cells. Previtellogenic oocytes are polarized. Homogeneous ooplasm (contains ribosomes) and granular ooplasm (comprises nuage aggregations of nuclear origin, rough endoplasmic reticulum (RER), Golgi complexes, ribosomes, and mitochondria) are distinguished
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Are vertebrates constrained to two sets of paired appendages? The morphology, development, and evolution of pre-pelvic claspers in the Holocephali J. Morphol. (IF 1.5) Pub Date : 2023-08-15 Riley C. Jones, Kayla Hall, Karen D. Crow
Holocephalans exhibit auxiliary appendages called pre-pelvic claspers (PPCs) that are located anterior to the pelvic fins, while pelvic claspers are pelvic fin modifications located posteriorly as modified metapterygia. Articulation points of the PPCs have not previously been imaged or evaluated in a comparative context, therefore, they may represent modified pelvic fin structures if they articulate
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Description of the neuroanatomy of the brachial plexus in South American lizards. Phylogenetic implications J. Morphol. (IF 1.5) Pub Date : 2023-08-11 Exequiel Alejandro Navarro, Matias Quipildor, Sebastián Quinteros
Few studies considered the anatomy of the nerve plexuses and musculature associated with them in ectothermic sauropsids. Based on differentiated Sudan Black B staining and conventional dissections, we describe the neuroanatomy of the brachial plexus, its main associated nerves, and muscles. For that, representatives of the genera Diplolaemus, Liolaemus, Phymaturus, and Tropidurus were selected. Based
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Describing whisker morphology of the Carnivora J. Morphol. (IF 1.5) Pub Date : 2023-08-07 Gary Dougill, Charlotte A. Brassey, Eugene L. Starostin, Hayley Andrews, Andrew Kitchener, Gert H. M. van der Heijden, Victor G. A. Goss, Robyn A. Grant
One of the largest ecological transitions in carnivoran evolution was the shift from terrestrial to aquatic lifestyles, which has driven morphological diversity in skulls and other skeletal structures. In this paper, we investigate the association between those lifestyles and whisker morphology. However, comparing whisker morphology over a range of species is challenging since the number of whiskers
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Ovarian changes and development of the branchial placenta occurring in Jenynsia lineata (Cyprinodontiformes, Anablepidae) J. Morphol. (IF 1.5) Pub Date : 2023-08-07 Luca Di Cesare, Claudio G. Barbeito, Carlos Santamaría-Martín, Martín M. Montes, Mari C. Uribe, Silvia E. Plaul
In viviparous teleosts, intraovarian gestation occurs intrafollicularly, as in poeciliids, or intraluminally, as in goodeids and anablepids. Furthermore, there are two different forms of embryonic nutrition: lecithotrophy and matrotrophy; depending on the species, these can be exclusive or coexist during gestation. In matrotrophic species, nutrients are transmitted from the mother to the embryo and
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Ultrastructure of oogenesis in two tropical oviparous Demospongiae (Porifera): Cinachyrella apion and Tethya maza J. Morphol. (IF 1.5) Pub Date : 2023-08-04 Vivian Vasconcellos, Sally Leys, Emilio Lanna
Reproduction is a key step for propagation of any species. Consequently, gametogenesis is crucial, as it links one generation to the other. Oogenesis is influenced by different factors, but it is usually related to the quality and quantity of the food and the capacity of the female to convert these resources into egg production. In Demospongiae (Porifera), oocytes vary in several aspects (e.g., origin
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The unplumatellid Plumatella fruticosa found its home: Hirosella gen. nov. morphological arguments for the systematic placement of a freshwater bryozoan J. Morphol. (IF 1.5) Pub Date : 2023-08-04 Julian Bibermair, Thomas Schwaha
Bryozoans are colonial, suspension-feeding lophotrochozoans. The phylum consists of the large group of chiefly marine Myolaemata and the exclusively limnic Phylactolaemata. Each colony consists of individual zooids that comprise the protective cystid and the retractable polypide. Phylactolaemates are a small group of approximately 90 species in 6 families. They feature a body wall, that can either
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A new discovery in the permafrost of Yakutia sheds light on the nasal horn morphology of the woolly rhinoceros J. Morphol. (IF 1.5) Pub Date : 2023-08-02 Ruslan I. Belyaev, Gennady G. Boeskorov, Maksim Yu. Cheprasov, Natalya E. Prilepskaya
Extinct woolly rhinoceroses were iconic representatives of the Late Pleistocene mammoth fauna of Eurasia. These animals were characterized by two huge keratinous horns. In adults, the length of the nasal horn often exceeded one meter. The nasal horn of Coelodonta was characterized by an unusual feature for rhinoceroses—the width of its base was considerably narrower than the width of the rugosity area
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Nasal turbinates of the dicynodont Kawingasaurus fossilis and the possible impact of the fossorial habitat on the evolution of endothermy J. Morphol. (IF 1.5) Pub Date : 2023-07-31 Michael Laaß, Anders Kaestner
The nasal region of the fossorial anomodont Kawingasaurus fossilis was virtually reconstructed from neutron-computed tomographic data and compared with the terrestrial species Pristerodon mackayi and other nonmammalian synapsids. The tomography of the Kawingasaurus skull reveals a pattern of maxillo-, naso-, fronto- and ethmoturbinal ridges that strongly resemble the mammalian condition. On both sides
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Differential growth of the adductor muscles, eyeball, and brain in the chick Gallus gallus with comments on the fossil record of stem-group birds J. Morphol. (IF 1.5) Pub Date : 2023-07-25 Donald G. Cerio, Catherine J. Llera Martín, Aneila V. C. Hogan, Amy M. Balanoff, Akinobu Watanabe, Gabriel S. Bever
The avian head is unique among living reptiles in its combination of relatively large brain and eyes, coupled with relatively small adductor jaw muscles. These derived proportions lend themselves to a trade-off hypothesis, wherein adductor size was reduced over evolutionary time as a means (or as a consequence) of neurosensory expansion. In this study, we examine this evolutionary hypothesis through
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Morphological variation in the vomer of aquatic and terrestrial spelerpini salamanders J. Morphol. (IF 1.5) Pub Date : 2023-07-20 Hannah E. Darcy, Philip S. L. Anderson
The vomer is an important tooth-bearing cranial bone in the lungless salamanders (Caudata: Plethodontidae) that serves different functional roles in aquatic versus terrestrial feeding. Vomerine tooth rows that run parallel with the maxillary teeth are thought to help grasp prey while expelling water from the mouth, while posterior extensions of the tooth row may help terrestrial taxa bring prey down