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Henodus
Taxonomy
Henodus was named by Huene (1936) [Sepkoski's age data: Tr Carn-l Sepkoski's reference number: 2,940]. Its type is Henodus chelyops. It is the type genus of Henodontidae.
It was assigned to Placodontia by Huene (1936) and Huene (1938); to Cyamodontida by Rieppel (2001); to Placodontia by Sepkoski (2002); and to Henodontidae by Kuhn (1971), Carroll (1988), Rieppel (2000) and Miguel Chaves et al. (2018).
It was assigned to Placodontia by Huene (1936) and Huene (1938); to Cyamodontida by Rieppel (2001); to Placodontia by Sepkoski (2002); and to Henodontidae by Kuhn (1971), Carroll (1988), Rieppel (2000) and Miguel Chaves et al. (2018).
Species
H. chelyops (type species)
Synonymy list
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| O. Rieppel 2001 | Skull broad and flat; rostrum short and broad; anterior cutting edge of rostrum (premaxillaries) lined by a series of incompletely individualized denticles; maxillary without tooth plates but with deep grooves (possibly supporting baleens); palatine with single posterior tooth plate; upper temporal fenestra vestigial or absent; parietal broad and fan-shaped; cephalic condyle of quadrate posteriorly expanded and abutting a ventral flange of the squamosal; palatines separated from one another by broad vomers and pterygoids; dentary with deep groove and single posterior tooth plate; coronoid small, forming small coronoid process and remaining widely separated from lower margin of lower jaw. |