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Semisphaerocephalus

Trilobita - Ptychopariida - Ptychopariidae

Taxonomy
Semisphaerocephalus was named by Ivshin (1953). It is not extant.

It was assigned to Ptychopariidae by Jell and Adrain (2002).

Species lacking formal opinion data

Synonymy list
YearName and author
1953Semisphaerocephalus Ivshin
2002Semisphaerocephalus Jell and Adrain p. 444

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Ecdysozoa
Panarthropoda
phylumArthropodaLatreille 1829
RankNameAuthor
subphylumArtiopoda(Hou and Bergstrom)
classTrilobitaWalch 1771
subclassLibristoma
orderPtychopariidaSwinnerton 1915
familyPtychopariidaeMatthew 1887
genusSemisphaerocephalusIvshin 1953

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.

G. †Semisphaerocephalus Ivshin 1953
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Diagnosis
No diagnoses are available