Vologdinella is a poorly known genus of extinct animals of uncertain classification with small cylindrical shells. The animals are known from Middle Cambrian fossils from a Paleozoic limestone in the Chingiz Mountains of Kazakhstan. The genus was established by Russian paleontologist Zakhar Grigoryevich Balashov in 1962 for a single species, Vologdinella antiqua, which was originally described and illustrated as Orthoceras? antiquus by Aleksandr Grigoryevich Vologdin in 1931.
| Vologdinella Temporal range:
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|---|---|
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | incertae sedis |
| Family: | †Vologdinellidae Balashov in Ruzhentsev, 1962 |
| Genus: | †Vologdinella Balashov in Ruzhentsev, 1962[2] |
| Species: | †V. antiqua
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| Binomial name | |
| †Vologdinella antiqua (Vologdin, 1931)
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| Synonyms | |
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†Orthoceras? antiquus Vologdin, 1931 | |
The genus was historically classified as a cephalopod, though it has since been removed from this group.[1][3] Vologdinella bears superficial resemblance to the Early Cambrian Volborthella. In the same work establishing the former genus, the two genera were classified within their own families – Vologdinellidae and Volborthellidae, respectively – within the order Volborthellida. Volborthella was later included in Agmata, an extinct phylum proposed by the paleontologist and geologist Ellis L. Yochelson. Vologdinella was also considered for inclusion in the Agmata, or in questionable synonymy with Volborthella, but a later study determined that the genus was not related to them.[4][5]
See also edit
- Olenecoceras – another genus named by Balashov, also was formerly believed to be a cephalopod
References edit
- ^ a b Barskov, I. S.; Boiko, M. S.; Konovalova, V. A.; Leonova, T. B.; Nikolaeva, S. V. (2008). "Cephalopods in the marine ecosystems of the Paleozoic". Paleontological Journal. 42 (11): 1167. doi:10.1134/S0031030108110014.
- ^ Balashov, Z.G. (1962). Отряд Volborthellida [Order Volborthellida]. In Ruzhentsev, V.E. (ed.). Основы Палеонтологии. Моллюски - Головоногие. I. Наутилоидеи, эндоцератоидеи, актиноцератоидеи, бактритоидеи, аммоноидеи (агониатиты, гониатиты, климении) [The basics of paleontology. Mollusks - Cephalopods. I. Nautiloidea, Endoceratoidea, Actinoceratoidea, Bactritoidea, Ammonoidea (Agoniatitida, Goniatitida, Clymeniida)] (in Russian). Moscow: Academy of Sciences of the USSR. p. 72.
- ^ Dzik, J. (1981). "Origin of the cephalopoda" (PDF). Acta Palaeontologica Polonica. 26 (2): 161–191.
- ^ Yochelson, Ellis L. (1977). "Agmata, a Proposed Extinct Phylum of Early Cambrian Age". Journal of Paleontology. 51 (3): 437–454. JSTOR 1303675.
- ^ Yochelson, Ellis L.; Kisselev, Gennadii N. (2003). "Early Cambrian Salterella and Volborthella (Phylum Agmata) re‐evaluated". Lethaia. 36 (1): 8–20. doi:10.1080/00241160310001254.
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