| Pterioidea | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Bivalvia |
| Order: | Pteriida |
| Superfamily: | Pterioidea Gray 1840 (1820) |
Pterioidea is a superfamily of epifaunal marine bivalves mostly inhabiting continental shelf regions of tropical and subtropical oceans. The superfamily includes the economically-important saltwater pearl oysters as well as the oddly shaped hammer oysters (neither of which, however, is considered a true oyster). A number of species have found use as model organisms in the fields of medicine and science.[1]
It includes the following three accepted living families:
- Malleidae, the hammer oysters, Lamarck, 1818
- Pteriidae, the pearl oysters, tree oysters, and winged oysters, Gray, 1847 (1820)
- Pulvinitidae, a family of rare deep sea oysters, no common name, Stephenson, 1941
Fossil families include:
- Family †Aviculopectinidae
- Family †Bakevelliidae
- Family †Cassianellidae
- Family †Isognomonidae
- Family †Kochiidae
- Family †Pergamidiidae
- Family †Plicatosylidae
- Family †Posidoniidae
- Family †Pterineidae
- Family †Retroceramidae
References
[edit]- ^ Tëmkin, Ilya (2010). "Molecular phylogeny of pearl oysters and their relatives (mollusca, bivalvia, pterioidea)". BMC Evolutionary Biology. 10 (342): 1471–2148. Bibcode:2010BMCEE..10..342T. doi:10.1186/1471-2148-10-342. PMC 3271234. PMID 21059254.
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction