Biology:Myochama
Myochama is a genus of bivalves in the family Myochamidae.[1][2][3] They are restricted to the waters off southeastern Australia and New Zealand.[4]
Description
Myochama exhibit cementation where one valve is fixed to some hard substrate – similarly as oysters. In Myochama, it is the right valve that gets cemented, typically to the posterior region of shells of large infaunal bivalves. In Myochama anomioides, this happens when the shell is few millimeters in height (range 1.2–3.9 mm (0.05–0.15 in)). The cemented right valve is thin and flat or slightly convex, whereas the left valve is robust and strongly concave.[4]
Typical substrata for attachment include shells of Neotrigonia, Venericardia, and Glycymeris. Individuals that attach themselves to living objects tend to do so at smaller sizes than those attaching to inanimate objects (e.g., dead shells, rocks).[4]
Myochama probably have direct development (i.e., there are no free-living larvae).[4]
Species
There are four extant species:[2]
- (Tenison Woods, 1877) Stutchbury, 1830
- A. Adams, 1850 Myochama strangei
- Myochama anomioides A. Adams, 1850
- Myochama tasmanica Myochama transversa
There are also three species only known from the fossil record:[2]
- Pritchard, 1895 Tate, 1894
- †Myochama rugata †Myochama plana
- Tate, 1894 †Myochama trapezia
References
- ↑ "Myochama Stutchbury 1830". Paleobiology Database. https://paleobiodb.org/classic/basicTaxonInfo?taxon_no=18767.
- ↑ 2.0 2.1 2.2 "Myochama Stutchbury, 1830". MolluscaBase. World Register of Marine Species. 2024. http://www.marinespecies.org/aphia.php?p=taxdetails&id=492718.
- ↑ "Myochama Stutchbury, 1830". Species. GBIF. http://www.gbif.org/species/2288689.
- ↑ 4.0 4.1 4.2 4.3 Harper, Elizabeth M.; Morton, Brian (2000). "The biology and functional morphology of Myochama anomioides Stutchbury, 1830 (Bivalvia: Anomalodesmata: Pandoroidea), with reference ot cementation". Journal of Molluscan Studies 66 (3): 403–416. doi:10.1093/mollus/66.3.403.
Wikidata ☰ Q18585666 entry
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