Perrierina
Genus of bivalves
From Wikipedia, the free encyclopedia
Perrierina is a genus of marine bivalve molluscs of the family Cyamiidae.[1] Members of the genus are found in the waters of New Zealand, Australia and Antarctica.
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| Perrierina Temporal range: | |
|---|---|
| |
| Perrierina insulana | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Bivalvia |
| Family: | Cyamiidae |
| Genus: | Perrierina F. Bernard, 1897 |
| Type species | |
| Perrierina taxodonta F. Bernard, 1897 | |
| Synonyms[1] | |
| |
Description
Members of Perrierina have small, thin shells that are transversely-ovate and inequilateral (the anterior side being significantly shorter). The genus has a cap-shaped prodissoconch and shallow hinge plates, that have pairs of small cardinals in each valve.[2]
Taxonomy
Distribution
Perrierina is primarily found in the waters of New Zealand,[5][6] with additional species known to occur in south-eastern Australia and Antarctica.[7][8] The earliest currently known fossils of the genus, Perrierina sola, date to the Opoitian stage of the Pliocene in New Zealand (approximately 5.33 million years ago),[9] with similarly aged fossils found on King George Island of the South Shetland Islands.[8]
Species
Species within the genus Perrierina include:[1]
- †Perrierina bensoni L. C. King, 1933
- Perrierina georgiana C. A. Fleming, 1948
- Perrierina insulana A. W. B. Powell, 1933
- Perrierina matai C. A. Fleming, 1948
- Perrierina mestayerae A. W. B. Powell, 1933
- †Perrierina ovata Marwick, 1928
- Perrierina perstriata C. A. Fleming, 1948
- †Perrierina sola Laws, 1936
- Perrierina subquadrangula Dell, 1952
- Perrierina substriata A. W. B. Powell, 1935
- Perrierina taxodonta F. Bernard, 1897