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Tritoechia tokmakensis
Taxonomy
Tritoechia tokmakensis was named by Popov et al. (2001). Its type specimen is NMW 98.64G.11, a valve (ventral internal mould), and it is a 3D body fossil. Its type locality is Sample 5758. South of the Agalatas River valley, which is in a Floian carbonate sandstone in the Kurday Formation of Kazakhstan.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 2001 | Tritoechia tokmakensis Popov et al. p. 141 figs. 4.8; 6.1-13 |
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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.
†Tritoechia tokmakensis Popov et al. 2001
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| L. E. Popov et al. 2001 | Shell ventribiconvex, slightly transverse, subpentagonal in outline; anterior commissure rectimarginate; lateral profile of ventral valve almost straight anterior to the umbo, with maximum height near the beak; dorsal valve moderately and evenly convex; radial ornament parvicostellate with 4-5 costellae per 5 mm along the anterior margin of mature specimens; ventral muscle field large, elongated, extending anteriorly up to 33 % of sagittal valve length; median ridge anterior to the ventral muscle field and dorsal median sulcus absent. |
Measurements
No measurements are available
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| Source: g = genus, o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Aberhan et al. 2004, Bambach et al. 2007, Nesnidal et al. 2013, Hendy 2009 | |||||