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Pycnosteus

Pteraspidomorphi - Psammosteiformes - Psammosteidae

Taxonomy
Pycnosteus was named by Preobrajenski (1911) [Sepkoski's age data: D Give-u Sepkoski's reference number: 689].

It was assigned to Psammosteidae by Jordan (1963); and to Pteraspidomorphes by Sepkoski (2002).

Synonymy list
YearName and author
1911Pycnosteus Preobrajenski
1963Pycnosteus Jordan p. 585
2002Pycnosteus Sepkoski, Jr.

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
OlfactoresJefferies 1991
RankNameAuthor
subphylumVertebrata
classPteraspidomorphiGoodrich 1909
subclassHeterostraciLankester 1868
orderPsammosteiformesBerg 1937
familyPsammosteidaeTraquair 1896
genusPycnosteusPreobrajenski 1911

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