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Poulsenia
Taxonomy
Poulsenia was named by Resser (1936) [Sepkoski's age data: Cm Tojo Cm lMid Sepkoski's reference number: 81,463]. Its type is Solenopleura gronwalli.
It was assigned to Corynexochidae by Resser (1936); to Ptychopariidae by Jell and Adrain (2002); and to Ptychopariida by Sepkoski (2002).
It was assigned to Corynexochidae by Resser (1936); to Ptychopariidae by Jell and Adrain (2002); and to Ptychopariida by Sepkoski (2002).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1936 | Poulsenia Resser p. 26 |
| 2002 | Poulsenia Jell and Adrain p. 429 |
| 2002 | Poulsenia Sepkoski |
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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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. E. Resser 1936 | Small trilobites of average form. Cranidium rather wide, convex in both directions ; facial sutures diverging slightly an- terior to the eyes, but owing to the infolding of the anterior angles appear to converge. Glabella well defined, tapering, truncated or rounded in front ; two thirds or more of the length of the cranidium. Glabellar furrows two or three short pairs ; neck furrow and ring well defined. Eyes small, situated in middle or somewhat back of the middle of the head. Eye lines present, brim consisting of a more or less thickened rim and a preglabellar area of varying relative width.
Judging from somewhat uncertain material, the thorax consists of about 15 segments. Pygidium small, well fused, with axis well defined, and with pleural grooves. |