| Abstrakt: |
The study of the holotype of Striatolamia tchelkarnurensis Glickman, 1964 (Lamniformes: Odontaspididae), presumed to be an invalid species, in the Collection of the State Darwin Museum, described from the Chegan Formation of South Turgay (West Kazakhstan) and including more than 30 isolated teeth from one individual, showed that the species is valid. Morphological characters of the teeth of S. tchelkarnurensis, a terminal taxon of a genus that became extinct in the late Eocene, correspond to the evolutionary trend of the genus—an increase in the size of teeth and an increase in their cutting function due to a change in the shape of the crown and root. The article provides a redescription of the species in accordance with the requirements of the International Code of Zoological Nomenclature (1999). [ABSTRACT FROM AUTHOR] |
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