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Heterosteus

Arthrodira - Chelonichthyidae

Taxonomy
Heterosteus was named by Asmuss (1856) [Sepkoski's age data: D Give-u Sepkoski's reference number: 521]. It is not extant.

It was assigned to Chelonichthyidae by Jordan (1963); and to Arthrodira by Woodward (1891) and Sepkoski (2002).

Synonymy list
YearName and author
1856Heterosteus Asmuss
1891Heterosteus Woodward p. 308
1963Heterosteus Jordan p. 588
2002Heterosteus Sepkoski, Jr.

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
OlfactoresJefferies 1991
subphylumVertebrata
RankNameAuthor
Gnathostomata()
Osteichthyes()
subclassPlacodermi(M'Coy 1848)
orderArthrodiraWoodward 1891
orderTemnothoraci
familyChelonichthyidae
genusHeterosteusAsmuss 1856

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
No diagnoses are available