''Charisma compacta'' is a
species of extremely small
sea snail
Sea snail is a common name for slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the ...
, a
marine
Marine is an adjective meaning of or pertaining to the sea or ocean.
Marine or marines may refer to:
Ocean
* Maritime (disambiguation)
* Marine art
* Marine biology
* Marine debris
* Marine habitats
* Marine life
* Marine pollution
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* ...
gastropod
The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda ().
This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...
mollusk in the
family Trochidae, the top snails.
[Marshall, B. (2013). Charisma compacta Hedley, 1915. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=718885 on 2014-03-10]
Description
The height of the shell attains 1.9 mm, its diameter 2 mm. The shell is solid and has a turbinate shape. Its colour is pale cream. The four
whorls are rather loosely coiled and separated by channelled
sutures. The spire-whorls are smooth. The
body whorl
The body whorl is part of the morphology of the shell in those gastropod mollusks that possess a coiled shell. The term is also sometimes used in a similar way to describe the shell of a cephalopod mollusk.
In gastropods
In gastropods, the b ...
is sculptured with about twenty regularly spaced, sharp, spiral grooves. The
umbilicus measures about one-eighth of the shell's diameter; its margin is smooth and rounded. The aperture-side of the umbilicus shows an obscure funicle. The circular
aperture of the shell is descending. The inner
lip is slightly expanded. The outer lip is simple.
Hedley C. (1915), Studies on Australian Mollusca. Part XII; Proceedings of the Linnean Society of New South Wales v. 39
/ref>
Distribution
This marine species is endemic to Australia and occurs off New South Wales.
References
* Laseron, C. 1954. ''Revision of the Liotiidae of New South Wales''. The Australian Zoologist 12(1): 1-25, figs 1-49a
* Iredale, T. & McMichael, D.F. 1962. ''A reference list of the marine Mollusca of New South Wales''. Memoirs of the Australian Museum 11: 1-109
* Wilson, B. 1993. ''Australian Marine Shells. Prosobranch Gastropods''. Kallaroo, Western Australia : Odyssey Publishing Vol. 1 408 pp
External links
World Register of Marine Species
*
{{Taxonbar, from=Q13461723
compacta
Gastropods of Australia
Gastropods described in 1915