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Archaeopetasus
Taxonomy
Archaeopetasus is a genus. It is not extant.
It was assigned to Problematica by Sepkoski (2002) and Parkhaev and Demidenko (2010).
It was assigned to Problematica by Sepkoski (2002) and Parkhaev and Demidenko (2010).
Species lacking formal opinion data
Synonymy list
Year | Name and author |
---|---|
2002 | Archaeopetasus Sepkoski |
2010 | Archaeopetasus Parkhaev and Demidenko p. 923 |
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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.
G. †Archaeopetasus
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Diagnosis
Reference | Diagnosis | |
---|---|---|
P. Y. Parkhaev and Y. Demidenko 2010 | "Subconical hollow sclerites with wide basement and central straight or inclined apical part. Basement circular or oval in outlines, exterior surface with wavy longitudinal folds. External ornamentation composed of irregularly spaced granules, more prominent in basal part of sclerite. Internal surface smooth." |