Diloma coracinum
| Diloma coracinum | |
|---|---|
| |
| Drawing of a shell of Diloma coracinum | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Vetigastropoda |
| Order: | Trochida |
| Superfamily: | Trochoidea |
| Family: | Trochidae |
| Genus: | Diloma |
| Species: | D. coracinum
|
| Binomial name | |
| Diloma coracinum (Philippi, 1851)
| |
| Synonyms | |
Diloma coracinum is a
Description
The height of the shell between 6 mm and 9 mm, its diameter between 8.5 mm and 12 mm. The small, solid, imperforate has a depressed orbicular-conoid shape. It is lustreless. This is a very variable species, and the smallest Diloma occurring in New Zealand.
Sculpture: Rather distant spiral lirae, sometimes obsolete, crossed by oblique growth-lines.
Colour: purplish-black or black, unicoloured, or sparsely dotted, especially on the base, with yellow.
The epidermis is solid, not easily eroded. The
peristome. The umbilical tract is bounded on the outer lower margin by green, grey, or brown. The operculum is round, light brown, horny, multispiral with a central nucleus.[3]
Distribution
This marine species is endemic to New Zealand and occurs only around the coasts of the two largest main islands, where it is most frequently found on exposed southern or west coast shores.
References
- ^ Bouchet, P. (2013). Diloma coracinum (Philippi, 1851). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=546860 on 2014-03-18
- ^ Cook, Steve De C., “New Zealand Coastal Marine Invertebrates Vol 1”, Canterbury University Press, NZ 2010, ISBN 978-1877257-60-5
- ^ Suter H. (1913-1915), Manual of New Zealand Mollusca; Wellington, N. Z. :J. Mackay, govt. printer,1913-1915 (described as Monodonta coracina)
- ISBN 0-00-216906-1
- Donald K.M., Kennedy M. & Spencer H.G. (2005) The phylogeny and taxonomy of austral monodontine topshells (Mollusca: Gastropoda: Trochidae), inferred from DNA sequences. Molecular Phylogenetics and Evolution 37: 474-483
External links
- "Diloma (Cavodiloma) coracina". Gastropods.com. Retrieved 16 January 2019.