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Australonema varvarae
Taxonomy
Australonema varvarae was named by Gubanov and Yochelson (1994). Its type specimen is CSGM 96801, a shell, and it is a 3D body fossil. Its type locality is Omnutakh River, about 35 km south of Norilsk, which is in a Sheinwoodian carbonate limestone in the First Formation of the Russian Federation.
Synonymy list
| Year | Name and author |
|---|---|
| 1994 | Australonema varvarae Gubanov and Yochelson pp. 490 - 491 figs. 4 - 5 |
| 1997 | Australonema varvarae Frýda and Manda p. 83 |
| 2001 | Australonema varvarae Heidelberger p. 84 |
| 2023 | Australonema varvarae Wagner p. 4041 |
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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.
†Australonema varvarae Gubanov and Yochelson 1994
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. P. Gubanov and E. L. Yochelson 1994 | Turbiniform gastropods ornamented by eight or more spiral lirae more or less uniformly spaced along whorl profile.
Protoconch unknown; ornament similar from earliest known stage to largest known whorl without ontogenetic change; moderately low-spired, pleural angle about 75?; sutures distinct, not impressed; whorl embracing at or near periphery; whorl profile from suture with a narrow horizontal ramp, bending outward and downward to outer whorl face which is uniformly curved from ramp to base ofcolumella, periphery located near mid-whorl; anomphalus; outer whorl face ornamented by eight spiral lirae, all more or less uniformly spaced, interspaces about 4-5 times width of each lira, and with several more closely spaced lirae near base of columella; shell of two layers, a thin outer one and a thick inner one which retains spiral ornament; steinkern smooth and well rounded; growth lines on ramp straight, inclined prosocline from suture to upper edge of outer whorl face, unknown elsewhere on shell, but probably steeply prosocline; operculum paucispiral, flat on outer surface, inner surface unknown. |