Heteroptychodus is an extinct genus of hybodont that lived in Asia during the Early Cretaceous period. It had low, rounded durophagous teeth that are covered in ridges. Species have been reported from Japan, Mongolia, Malaysia, Thailand, Southern China, and possibly Kyrgyzstan. Fossils have been found in freshwater environments.[1]

Heteroptychodus
Temporal range: Early Cretaceous
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Subclass: Elasmobranchii
Order: Hybodontiformes
Genus: Heteroptychodus
Yabe and Obata, 1930
Species
  • Heteroptychodus chuvalovi
  • Heteroptychodus kokutensis
  • Heteroptychodus steinmanni

References

edit
  1. ^ Teng, Yu He; Sone, Masatoshi; Hirayama, Ren; Yoshida, Masataka; Komatsu, Toshifumi; Khamha, Suchada; Cuny, Gilles (2019-01-02). "First Cretaceous fish fauna from Malaysia". Journal of Vertebrate Paleontology. 39 (1): e1573735. doi:10.1080/02724634.2019.1573735. ISSN 0272-4634.