Search results for "condrictios"
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Chondrichthyans from the Spanish Triassic (westernmost Tethys) with remarks on the evolution of enameloid
2020
The Triassic sediments of the Iberian Peninsula has been the focus of Geological and Paleontological studies for more than a century and the stratigraphic sequence and the invertebrate assemblages are well established for a number of different basin. However, works focused on chondrichthyans faunas were nonexistent until recently. As a consequence, it has been long time assumed that chondrichthyans were very scarce (or inexistent) in the coastal environments of the current Iberian Peninsula during Triassic times. This view changed at the beginning of the last decade, with the studies of paleontologist from the department of Geology of the University of Valencia (Dra. Márquez-Aliaga, Dr. Héc…
Morphometric Discriminant Analysis of isolated chondrichthyan scales for palaeoecological inferences: the Middle Triassic of the Iberian Chain (Spain…
2014
[EN] Palaeontological studies on exosqueletal disarticulated remains of chondrichthyans have focused on teeth and only less interest has been paid to scales due their limited taxonomic and systematic significance. However, classical works linking the morphology and the function of the squamation in extant sharks suggest that, despite their limited taxonomic value, the study of isolated scales can be a useful tool for palaeoenvironmental and palaeoecological inferences. Following this idea, we have analyzed the fossil record of shark scales from two Middle Triassic sections of the Iberian Chain (Spain), identifying different functional types by means of a morphometric discriminant analysis. …