''Eurytrochus maccullochi'' is a
species of 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
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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. (2014). Eurytrochus macculochi. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=719225 on 2014-06-05]
Description
The shell grows to a length of 6 mm, its diameter 6.5 mm. The small, very solid shell has a depressedly globose shape and is subcarinate. Its colour is dull white, radially painted with flames of black or chocolate, which persist more on ribs than interstices. The shell contains six
whorl
A whorl ( or ) is an individual circle, oval, volution or equivalent in a whorled pattern, which consists of a spiral or multiple concentric objects (including circles, ovals and arcs).
Whorls in nature
File:Photograph and axial plane floral ...
s. Their
sculpture shows above the periphery six subgranose spiral ribs, elevated, widely spaced, increasing in size from the
suture to the periphery and ascending the
spire. The interstices are occupied by one or two spiral threads and roughened by fine radial growth lines. On the base, eight similar spiral cords decrease in size from the periphery to the
umbilicus. The subquadrate
aperture descends slightly but suddenly. The inner edge is bevelled, of a dull callus, radiately plicate, the margins united by a thick layer of callus, within brilliantly nacreous. An expansion of the
columella slightly intrudes upon the umbilicus, which is narrow but deep, margined by a crenulate rib, internally with two deep-seated funicles.
Charles Hedley, The Mollusca of Mast Head Reef, Capricorn Group, Queensland. Part II; Proceedings of the Linnean Society of New South Wales v. 32 (1907)
(described as ''Gibbula macculochi'')
Distribution
This marine species is endemic to and occurs off North Queensland, Australia.
References
* Hedley, C. 1907. ''The Mollusca of Mast Head Reef, Capricorn Group, Queensland, part II''. Proceedings of the Linnean Society of New South Wales 32: 476-513, pls 16-21
* Wilson, B. 1993. ''Australian Marine Shells. Prosobranch Gastropods''. Kallaroo, Western Australia : Odyssey Publishing Vol. 1 408 pp
External links
To World Register of Marine Species
{{Taxonbar, from=Q13629611
maccullochi
Gastropods of Australia
Gastropods described in 1907