Idiomysis
From Wikipedia, the free encyclopedia
| Idiomysis | |
|---|---|
 | |
| Idiomysis sp. | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Malacostraca |
| Order: | Mysida |
| Family: | Mysidae |
| Subfamily: | Mysinae |
| Tribe: | Anisomysini |
| Genus: | Idiomysis W. Tattersall, 1922[1] |
| Species | |
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Idiomysis is a genus of small mysids found in warm, shallow waters of the Indian Ocean (including the Red Sea) and the Pacific.[2]
Mysids from the genus Idiomysis are just a few millimeters in length; their cephalothorax is gibbous and robust whereas the abdomen is characteristically curled up behind.[1][3] When compared with other mysids, Idiomysis has short antennae, relatively big eyes and small, usually unarmed telson,[1] however a single species, I. diadema, possesses a pair of short terminal spines.[3]
Systematics
There are so far seven species described in the genus:[2]
- Idiomysis bumbumiensis Nurshazwan, Sawamoto & Rahim, 2021
- Idiomysis diadema Wittmann, 2016
- Idiomysis inermis W. Tattersall, 1922
- Idiomysis japonica Murano, 1978
- Idiomysis mozambica Deprez, Wooldridge & Mees, 2001
- Idiomysis robusta Connell, 2008
- Idiomysis tsurnamali Bacescu, 1973.
Ecology
Idiomysis live in small swarms of 5 to more than 40 individuals, which swim close to the seabed.[4] All known species are found in shallow coastal waters, however they inhabit different niches and can be found on coral reefs, seaweeds, rocks or sandy bottoms[4]. Two species – I. inermis and I. tsurnamali – are known for commensal relationship with sea anemones,[4] whereas I. diadema is associated with the sea urchin Diadema.[3] There are also reports of Idiomysis swimming above upside-down Cassiopea jellyfish.[4] It is possible that mysids gain food or protection from this relationship, however the exact nature of this relation has not been studied.[4]
