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Tympanuella
Taxonomy
Tympanuella was named by Sundberg (1994) [Sepkoski's age data: Cm mMid-u Sepkoski's reference number: 1089]. Its type is Tympanuella transversa.
It was assigned to Ehmaniellinae by Sundberg (1994); to Alokistocaridae by Jell and Adrain (2002); and to Ptychopariida by Sepkoski (2002).
It was assigned to Ehmaniellinae by Sundberg (1994); to Alokistocaridae by Jell and Adrain (2002); and to Ptychopariida by Sepkoski (2002).
Species
T. transversa (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 1994 | Tympanuella Sundberg p. 87 |
| 2002 | Tympanuella Jell and Adrain p. 465 |
| 2002 | Tympanuella 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 | |
|---|---|---|
| F. A. Sundberg 1994 | Ehmaniellinae with subrectangu- lar cranidium with divergent facial sutures anterior of palpebral lobes; moderate to long palpebral lobes (35-45% glabellar length); well-defined anterior border, moderately narrow (10-15% cranidial length), slightly to moderately tapered; preglabellar field sagittally moderately wide (50-55% frontal area length); slightly tapered glabella; moderately round- ed frontal lobe; exsagittally narrow posterior area of fixigenae (20-35% glabellar length). Pygidium subtriangular with elongate axis, 4 axial rings; mod- erate depth pleural furrows; moderately convex anterior and posterior pleural bands. |