Results 221 to 230 of about 16,548 (278)
Kalat - Actinopterygii, Chondrichthyes, Cephalaspidomorphi
Väinölä, Risto, Urho, Lauri
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II CHONDRICHTHYES, Knorpelfische
2014Die uber 1 200 Arten der Knorpelfische sind nur etwa 4 % aller heute lebenden Fischarten. Ihr knorpeliges Endoskelett kann zwar verkalken, wird aber nie zu Knochen umgebaut. Der Schadel besteht nur aus Neurocranium und Viscerocranium, ein Dermatocranium fehlt.
Wilfried Westheide, Gunde Rieger
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Cartilaginous fishes (Chondrichthyes)
2009Abstract Living members of the Subclasses Holocephali (chimaeras, including ratAshes, spookAshes, and rabbitAshes, 43 sp.) and Elasmobranchii (sharks, rays, skates, sawAshes, and guitarAshes, 1125 sp.) together comprise the extant representatives of the Class Chondrichthyes (cartilaginous Ashes) (1).
Matthew P Heinickea +2 more
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Electric organ development in Torpedo marmorata, chondrichthyes
Developmental Biology, 1978Abstract The development of electric organs (EO) in the electric ray, Torpedo marmorata, is described. Four pairs of electric nerves contact the branchiomeric mesoderm layer, which produces four pairs of EO primordia (at about the stage of 21-mm total body length, 70-mg weight).
J, Mellinger +3 more
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Deep Chondrichthyes in Mauritanian Waters
2017This study analyses the sampling of 22,118 individuals and 24 tons of demersal elasmobranches caught at 243 trawling stations during four Maurit surveys , which sampled Mauritanian waters, from 84 to 1835 m depth. We identified a total of 48 different species belonging to 17 families .
Pedro J. Pascual˗Alayón +3 more
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Dental homologies in lamniform sharks (Chondrichthyes: Elasmobranchii)
Journal of Morphology, 2001AbstractThe dentitions of lamniform sharks are said to exhibit a unique heterodonty called the “lamnoid tooth pattern.” The presence of an inflated hollow “dental bulla” on each jaw cartilage allows the recognition of homologous teeth across most modern macrophagous lamniforms based on topographic correspondence through the “similarity test.” In most ...
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