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Tetragramma

Echinoidea - Pseudodiadematidae

Taxonomy
Tetragramma was named by Agassiz (1840) [Sepkoski's age data: J Call K Turo-u Sepkoski's reference number: 577,956].

It was assigned to Hemicidaroida by Sepkoski (2002); and to Pseudodiadematidae by Fell and Pawson (1966), Smith (1991) and Berndt (2003).

Synonymy list
YearName and author
1840Tetragramma Agassiz
1966Tetragramma Fell and Pawson p. U390
1991Tetragramma Smith p. 22
2002Tetragramma Sepkoski, Jr.
2003Tetragramma Berndt p. 80

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
phylumEchinodermata
subphylumEchinozoa
RankNameAuthor
classEchinoidea()
subclassEuechinoideaBronn 1860
superorderAcroechinoidea()
Carinacea
familyPseudodiadematidae
genusTetragrammaAgassiz 1840

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