The Subclass Elasmobranchii is widely considered nowadays to be the sister group of the
Subclass Holocephali, although chimaeroid fishes were originally classified as …

Estimating deep-time species-level diversification processes remains challenging. Both the
fossil record and molecular phylogenies allow the estimation of speciation and extinction …

Living sharks, skates and rays share several derived skeletal characters that are absent in
most extinct elasmobranchs, suggesting a monophyletic group of 'higher'elasmobranchs …

A systematic SEM survey of tooth microstructure in (primarily) fossil taxa spanning
chondrichthyan phylogeny demonstrates the presence of a superficial cap of single …

The Palaeozoic history of neoselachian sharks is barely known, and the first unequivocal
member ofthis clade is recognized from the Lower Triassic. At the end of the Triassic …

The shark fauna from the Anisian of Nevada is dominated by durophagous hybodontiforms
but also shows an important neoselachian component. Two new species of hybodontiform …

Enameloid is a hard mineralized tissue covering chondrichthyan and actinopterygian teeth.
Over the past 40 years, it has been extensively studied in various extinct and extant sharks …

Nearly 4000 hybodontoid teeth assignable to the typically Mesozoic genera Acrodus and
Polyacrodus were recovered by bulk-sampling techniques from the Early Permian Wichita …

This study identifies three new neoselachian tooth taxa from the Middle and Upper Triassic.
On the basis of morphological and histological characters, Rhomaleodus budurovi, nov …

The skeletal morphology of Paraorthacodus jurensis, a Late Jurassic neoselachian from
Nusplingen, is described based on the incomplete holotype and a newly discovered almost …