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Nikolaispira rasilis
Taxonomy
Nikolaispira rasilis was named by Nikitin et al. (1996). Its type specimen is CNIGR 44/12888, a shell (complete shell), and it is a 3D body fossil. Its type locality is F-1014. Sortan-Manai salt marsh, Betpak-Dala desert, mud mound, which is in a Katian reef, buildup or bioherm floatstone in the Dulankara Formation of Kazakhstan. It is the type species of Nikolaispira.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1996 | Nikolaispira rasilis Nikitin et al. p. 95 figs. 8A-J, 10 |
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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.
†Nikolaispira rasilis Nikitin et al. 1996
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| I.F. Nikitin et al. 1996 | Shell ventribiconvex, smooth, with parasulcate anterior margin; ventral sulcus and dorsal fold developed anterior to mid-length; ventral interior with small teeth supported by short and thin, laterally placed dental plates; dorsal interior with septalium supported by low median septum; brachidium with up to four laterally directed whorls, jugal processes discrete and directed posteroventrally. |
Measurements
No measurements are available
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| Source: subo = suborder, c = class, p = phylum, uc = unranked clade | |||||
| References: Aberhan et al. 2004, Nesnidal et al. 2013 | |||||