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Callispira tricostata
Taxonomy
Callispira tricostata was named by Mazaev (2011). Its type specimen is PM RAS 4471/91/39, a shell, and it is a 3D body fossil. Its type locality is Locality 091. Aleksandrovskii Quarry, Bed 2, near Annenskii Most, which is in a Podolskian carbonate limestone in the Vaskino Formation of the Russian Federation.
Synonymy list
| Year | Name and author |
|---|---|
| 2011 | Callispira tricostata Mazaev pp. 1563 - 1565 figs. pl. 1 f. 3-4 |
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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.
†Callispira tricostata Mazaev 2011
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. V. Mazaev 2011 | The shell is large, turriform, composed of over ten weakly convex whorls. The suture is impressed, very thin, and shallow. The whorl face profile is pendant: moderately convex in the lower part and moderately concave in the upper part. The whorl face is ornamented with four distinct equally wide spiral lirae. The second spiral lira separates the upper concave and lower convex surfaces of the whorl face and forms a weak shoulder. The fourth lira clearly separates the whorl face from the whorl base and forms a weak carina. Three upper lirae are located approximately at midwhorl and are grouped, separated by even spaces. The fourth (lower) lira is shifted directly to the lower suture, while the lower space between lirae is always slightly wider than the spaces between three upper lirae. The space between the suture and the upper lira is 1.5–2 times wider than the spaces between the three upper lirae and forms a wide, slightly concave, smooth spiral band. The whorl base is weakly convex and smooth. Growth lines are indiscernible. The protoconch, apical whorls and aperture are not preserved. |
Measurements
No measurements are available
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| Source: superf = superfamily, c = class | |||||
| References: Kiessling 2004, Hendy et al. 2009 | |||||
Age range: Podolskian or 311.46000 to 308.90000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Podolskian | Russian Federation (Vologodskaya ) | Callispira tricostata (type locality: 156385) |