Macluritoidea

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Macluritoidea (or Macluritacea)
Temporal range: L Cambrian- Devonian
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda(?)
Order:
Archaeogastropoda (?)
Superfamily:
Macluridoidea

Fisher, 1885

The Macluritoidea, or Macluritacea as it was originally spelled, is a superfamily of hyperstrophically coiled, Upper Cambrian to Devonian, archaeogastropods,[1] or paragastropods according to Linsely and Kier (1984).[2]

Coiling is dextral, although it appears sinistral,[1] deduced from the position of the channel (presumed to be exhalent) contained in a ridge or keel (a selenizone on what is assumed to be the upper side. This is supported by the operculum of , which corresponds to that of dextral gastropods.

According to the Treatise the Macluritaceae includes two families, the Onychochilidae and Macluridae. Subsequent placement in the Paragastropoda[2] is based on the assumption these animals were untorted, that is they lacked the twisted viscera that are present in modern gastropods.

References[]

  1. ^ a b Treatise on Invertebrate Paleontology, Part I, Mollusca 1. R.C. Moore (ed); Geol Soc of America and Univ Kansas Press, 1960
  2. ^ a b Robert M. Linsely, & Willian M. Kier, 1984. The Paragastropoda: a proposal for a new class of Paleozoic Mollusca. Malacologia, v.25, no.1, pp 241-254
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