Cycloholcus nummus, from Knight et al. (1960).

Belongs within: Helcionellida.

The Coreospiridae are a group of univalved molluscs from the Early Cambrian with a planispiral or near-planispiral shell with few coils (Parkhaev 2002).

Coreospiridae [Coreospiroidei]
|--Cambrospira Yu 1979P02
|--Hugiagouella Chen & Zhang 1980P02
|--Cambroconus Yu 1981P02
|--Hubeispira Yu 1981P02
|--Uncinaspira He 1984P02
|--‘Gibbaspira’ He 1984 non McLean 1971P02
|--Kutanjia Kruse 1991P02
|--Tichkaella Geyer 1986P08, P02
|--Anhuiconus Zhou & Xiao 1984P02
| `--A. microtuberusP08
|--Coreospira Saito 1936P02
| |--*C. rugosa Saito 1936KC60
| `--C. walcottiK52
|--Pseudoyangtzespira Bokova 1990P08, P02
| `--P. selindeicaP08
|--Oelandiella Vostokova 1962 (see below for synonymy)P02
| |--*Archaeospira’ ornata Yu 1979BR17
| `--*Yangtzespira’ exima Yu 1979BR17
`--Latouchella Cobbold 1921 [Latouchellidae, Latouchellinae]P02
|--*L. costata Cobbold 1921F62
|--L. angustaR96
|--L. korobkovi (Vostokova 1962)D94
|--L. memorabilis Missarzhevskii 1969BE93
`--L. penecyrano Runnegar & Jell 1976RJ76

Oelandiella Vostokova 1962 [incl. Archaeospira Yu 1979, Yangtzespira Yu 1979; Archaeospiridae, Yangtzespiridae, Yangtzespirinae]P02

*Type species of generic name indicated


[BE93] Benton, M. J., & D. H. Erwin. 1993. Mollusca: Amphineura and ‘Monoplacophora’. In: Benton, M. J. (ed.) The Fossil Record 2 pp. 125–130. Chapman & Hall: London.

[BR17] Bouchet, P., J.-P. Rocroi, B. Hausdorf, A. Kaim, Y. Kano, A. Nützel, P. Parkhaev, M. Schrödl & E. E. Strong. 2017. Revised classification, nomenclator and typification of gastropod and monoplacophoran families. Malacologia 61 (1–2): 1–526.

[D94] Dzik, J. 1994. Evolution of ‘small shelly fossils’ assemblages of the early Paleozoic. Acta Palaeontologica Polonica 39 (3): 247–313.

[F62] Fisher, D. W. 1962. Small conoidal shells of uncertain affinities. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt W. Miscellanea: Conodonts, Conoidal Shells of Uncertain Affinities, Worms, Trace Fossils and Problematica pp. W98–W143. Geological Society of America, and University of Kansas Press.

[K52] Knight, J. B. 1952. Primitive fossil gastropods and their bearing on gastropod classification. Smithsonian Miscellaneous Collections 117 (13): 1–56, 2 pls.

[KC60] Knight, J. B., L. R. Cox, A. M. Keen, R. L. Batten, E. L. Yochelson & R. Robertson. 1960. Gastropoda: systematic descriptions. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt I. Mollusca 1: Mollusca—General Features, Scaphopoda, Amphineura, Monoplacophora, Gastropoda—General Features, Archaeogastropoda and some (mainly Paleozoic) Caenogastropoda and Opisthobranchia pp. I169–I331. Geological Society of America, and University of Kansas Press.

[P02] Parkhaev, P. Yu. 2002. Phylogenesis and the system of the Cambrian univalved mollusks. Paleontologicheskii Zhurnal 2002 (1): 27–39 (translated: Paleontological Journal 36 (1): 25–36).

[P08] Parkhaev, P. Y. 2008. The Early Cambrian radiation of Mollusca. In: Ponder, W. F., & D. R. Lindberg (eds) Phylogeny and Evolution of the Mollusca pp. 33–69. University of California Press: Berkeley.

[R96] Runnegar, B. 1996. Early evolution of the Mollusca: the fossil record. In: Taylor, J. D. (ed.) Origin and Evolutionary Radiation of the Mollusca pp. 77–87. Oxford University Press: Oxford.

[RJ76] Runnegar, B., & P. A. Jell. 1976. Australian Middle Cambrian molluscs and their bearing on early molluscan evolution. Alcheringa 1 (2): 109–138.

Leave a comment

Your email address will not be published. Required fields are marked *