Results 31 to 40 of about 896 (181)
Enigmatic Nodal and Lefty gene repertoire discrepancy: Latent evolutionary history revealed by vertebrate-wide phylogeny. [PDF]
Dev DynAbstract Homology in vertebrate body plans is traditionally ascribed to the high‐level conservation of regulatory components within the genetic programs governing them, particularly during the “phylotypic stage.” However, advancements in embryology and molecular phylogeny have unveiled the dynamic nature of gene repertoires responsible for early ...
Kuraku S.
europepmc +2 more sources
Head anatomy of a lantern shark wet‐collection specimen (Chondrichthyes: Etmopteridae)
Journal of Anatomy, Volume 242, Issue 5, Page 872-890, May 2023., 2023 In this study, we present a two‐step micro‐computed tomography array to a 39‐year‐old wet‐collection Lantern Shark specimen of Etmopterus lucifer. The focus of our scanning approach is the head anatomy showing numerous internal structures, for example the ampullae of Lorenzini, the olfactory system and major brain areas.
Manuel Andreas Staggl +2 more
wiley +1 more source
Ecology and Evolution, Volume 13, Issue 3, March 2023., 2023 Based on a simplified and attempt, yet rigorous, elicitation framework, we obtained expert's estimations of a species' probability of being caught (fatally), at fishing fleet segment scale. Based on these estimates, we developed a creative method, structured to assess the fishing‐related risks for species of conservation concern.
Umberto Scacco +2 more
wiley +1 more source
Papers in Palaeontology, Volume 8, Issue 6, November/December 2022., 2022 Abstract Middle Miocene (Badenian) chondrichthyan fossils collected from the Tekeres Schlieren Member of the Baden Formation at Tekeres (southern Hungary, Mecsek Mts) are described here. The chondrichthyan assemblage is exceptionally diverse and well‐preserved, and consists of holocephalans, selachians and batomorphs.
Márton Szabó +6 more
wiley +1 more source
Vacchi's palatal organ: a widespread trait in Holocephali
Journal of Fish Biology, 2018 A palatal organ, possibly used for food sorting and processing, has previously been identified among the vomerine toothplates of the chimaeroid Chimaera monstrosa. In this study, the palatal organ was described in six additional species, confirming it is a widespread trait among holocephalans.
Finucci B +6 more
openaire +5 more sources
On the South Atlantic distribution of Callorhinchus callorhynchus (Holocephali: Callorhynchidae) [PDF]
Journal of Applied Ichthyology, 2000 The four species of the family Callorhynchidae are restricted to the southern hemisphere ( Didier 1995) and have the most littoral-related distribution among holocephalans.
López, Hugo Luis +2 more
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Late Cretaceous chimaeroids (Chondrichthyes: Holocephali) from Alabama, USA [PDF]
PaleoBios, 2014 Tooth plates of three extinct species of callorhynchid holocephalans, Edaphodon mirificus , E. barberi , and Ischyodus bifurcatus have been collected from Upper Cretaceous strata of Alabama. Of the two species of Edaphodon , E. mirificus is represented by isolated tooth plates as well as associated dentitions.
Cicimurri, David J., Ebersole, Jun A.
openaire +4 more sources
Egyptian Journal of Aquatic Research, 2022 The present work reported the length-weight relationship of four deep-sea chondrichthyan species (i.e., Hydrolagus spp., E. granulosus, C. owstonii and C.
Paulina Sepa +3 more
doaj +1 more source
Nerve Growth Factor Receptor (NGFR/p75NTR) of the Small-Spotted Catshark (Scyliorhinus canicula): Evolutionary Conservation and Brain Function. [PDF]
J Comp Neurolp75NTR expression in the brain of the basal vertebrate Scyliorhinus canicula revealed its conservation across species. Functional conservation among vertebrates was demonstrated (i) by performing the canonical PC‐12 differentiation assay with the S. canicula NGF and (ii) by complementing the p75NTR absence in a PC‐12 p75NTR−/− knock‐out clone with the ...
Chiavacci E +5 more
europepmc +2 more sources