Elasmobranchii are relatively well-studied. However, numerous phylogenetic uncertainties
about their relationships remain. Here, we revisit the phylogenetic evidence based on a …

The morphology of paired fins is commonly overlooked in morphological studies, particularly
the pelvic girdle and fins. Consequently, previous phylogenetic studies incorporating …

Chondrichthyans have a long evolutionary history, reaching back over 450 million years.
Despite the longevity of the chondrichthyan fossil record, it is remarkably incomplete. This …

The Late Jurassic elasmobranch Protospinax annectans is often regarded as a key species
to our understanding of crown group elasmobranch interrelationships and the evolutionary …

We present a time-scaled analysis based on morphological characters to estimate the
divergence ages for the major batoid clades. Two approaches were used: tip-dating, which …

ABSTRACT A new fossil herring species is named in this work as Armigatus carrenoae,
based on specimens from the marine Albian deposits of the Tlayúa Formation, near Tepexi …

We here re-evaluate the skeletal anatomy and the systematic position of the two Eocene
guitarfish species represented by almost complete and articulated material from the …

This contribution presents the first detailed microfacies analysis of the Lower Member of the
Albian Tlayúa Formation outcropping in southern Mexico. The basis for this study consists of …

A great amount of studies dealing with vertebrate paleoichnology, are based on footprints
made by terrestrial vertebrates; studies on fish paleoichnology, however, are less common …

The rays of the order Myliobatiformes present several diagnostic characters, the most
striking one being the presence of a serrated sting on the dorsal region of the tail. Although …