| Myida | |
|---|---|
| |
| A live individual of the soft-shelled clam, Mya arenaria | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Bivalvia |
| Infraclass: | Heteroconchia |
| Subterclass: | Euheterodonta |
| Superorder: | Imparidentia |
| Order: | Myida Stoliczka, 1870 |
| Superfamilies and families | |
|
See text | |
| Synonyms | |
|
Myoida | |
Myida (formerly Myoida) is an order of saltwater and freshwater clams, marine and freshwater bivalve molluscs in the subclass Heterodonta. The order includes such bivalves as soft-shell clams, geoducks and shipworms.
Description
[edit]They are burrowing molluscs with well-developed siphons. The shell is relatively soft and lacks a nacreous layer. Some species have a single cardinal tooth.[1]
Superfamilies and families
[edit]Superfamilies and families within the Myida include:[2]
- Superfamily: Dreissenoidea
- Family: Dreissenidae
- Superfamily: Myoidea
- Family: Corbulidae
- Family: Myidae
- Family: †Pleurodesmatidae
- Family: †Raetomyidae
- Superfamily: Pholadoidea
- Family: Pholadidae
- Family: Teredinidae
- Family: Xylophagaidae
- Superfamily: †Pleuromyoidea
- Family: †Ceratomyidae
- Family: †Pleuromyidae
- Family: †Vacunellidae
References
[edit]- ^ Barnes, Robert D. (1982). Invertebrate Zoology. Philadelphia, PA: Holt-Saunders International. p. 431. ISBN 0-03-056747-5.
- ^ "WoRMS - World Register of Marine Species - Myida". www.marinespecies.org. Retrieved 2019-04-03.
- Powell A W B, New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979 ISBN 0-00-216906-1
External links
[edit]
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