Heterogeneous conservation of Dlx paralog co-expression in jawed vertebrates. [PDF]
PLoS ONE, 2013 BACKGROUND: The Dlx gene family encodes transcription factors involved in the development of a wide variety of morphological innovations that first evolved at the origins of vertebrates or of the jawed vertebrates.
Mélanie Debiais-Thibaud +8 more
doaj +1 more source
Dental crown morphological variation and heterodonty in carcharhiniform sharks. [PDF]
Anat Rec (Hoboken)Abstract Elasmobranch teeth are highly mineralized structures that constitute the majority of the fossil record for this group. Despite their taxonomic and evolutionary significance, detailed descriptions of dental morphology remain scarce. The order Carcharhiniformes, the most diverse among sharks, comprises 304 valid species that display remarkable ...
Zanini F, Soares KDA.
europepmc +2 more sources
Observations on the behavior of Schroederichthys chilensis (Carcharhiniformes, Scyliorhinidae)
Revista Peruana de Biología, 2014 Schroederichthys chilensis, the redspotted catshark or chilean catshark, is an endemic species to Peruvian and Chilean waters. Observations on its behavior in the National Reserve System of Guano Islands, Islets, and Capes – Punta San Juan and Paracas ...
Daniel Flores, Grant D. Adams
doaj +1 more source
Loss of Active Neurogenesis in the Adult Shark Retina
Frontiers in Cell and Developmental Biology, 2021 Neurogenesis is the process by which progenitor cells generate new neurons. As development progresses neurogenesis becomes restricted to discrete neurogenic niches, where it persists during postnatal life.
Ismael Hernández-Núñez +7 more
doaj +1 more source
Interference with the retinoic acid signalling pathway inhibits the initiation of teeth and caudal primary scales in the small-spotted catshark Scyliorhinus canicula [PDF]
PeerJ, 2023 The retinoic acid (RA) pathway was shown to be important for tooth development in mammals, and suspected to play a key role in tooth evolution in teleosts.
Isabelle Germon +5 more
doaj +2 more sources
A shift in anterior–posterior positional information underlies the fin-to-limb evolution
eLife, 2015 The pectoral fins of ancestral fishes had multiple proximal elements connected to their pectoral girdles. During the fin-to-limb transition, anterior proximal elements were lost and only the most posterior one remained as the humerus.
Koh Onimaru +5 more
doaj +1 more source
Oviparous elasmobranch development inside the egg case in 7 key stages. [PDF]
PLoS ONE, 2018 Embryological stages of oviparous elasmobranch during development can be difficult to identify, requiring magnification and/or fixation of an anaesthetized embryo.
Syafiq M Musa +2 more
doaj +1 more source
Frontiers in Neuroscience, 2018 The neuropeptide gonadotropin-releasing hormone (GnRH) plays an important role in the control of reproductive functions. Vertebrates possess multiple GnRH forms that are classified into three main groups, namely GnRH1, GnRH2, and GnRH3.
Anne-Laure Gaillard +9 more
doaj +1 more source
Ctenacis fehlmanni, Harlequin Catshark [PDF]
, 2017 The Harlequin Catshark (Ctenacis fehlmanni) is a small (to at least 52 cm total length) outer shelf dwelling catshark, known from 70 m to over 300 m depth off Somalia in the Arabian Sea.
Akhilesh, K V +5 more
core +1 more source
In vitro and in vivo gene transfer in the cloudy catshark Scyliorhinus torazame
Development, Growth & Differentiation, 2022 Abstract Cartilaginous fishes have various unique physiological features such as a cartilaginous skeleton and a urea‐based osmoregulation strategy for adaptation to their marine environment. Also, because they are a sister group of bony vertebrates, understanding their unique features is important from an evolutionary perspective ...
Chika Fujimori +6 more
openaire +2 more sources