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Tympanuella transversa
Taxonomy
Tympanuella transversa was named by Sundberg (1994). Its type specimen is LACMIP 11906, a cephalon/head, and it is a 3D body fossil. It is the type species of Tympanuella.
Synonymy list
| Year | Name and author |
|---|---|
| 1994 | Tympanuella transversa Sundberg pp. 87 - 89 figs. Figure 55 |
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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.
†Tympanuella transversa Sundberg 1994
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. A. Sundberg 1994 | Same as genus. [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; moderate depth pleural furrows; moderately convex anterior and posterior pleural bands.] |
Measurements
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| Source: f = family, c = class | |||||
| References: Aberhan et al. 2004, Hendy 2009 | |||||