''Pleurotomella hayesiana'' is a
species of
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
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 Raphitomidae
Raphitomidae is a family of small to medium-sized sea snails, marine gastropod mollusks in the superfamily Conoidea.Bouchet P. & Rocroi J.-P. (Ed.) (2005). "Classification and nomenclator of gastropod families". ''Malacologia'' 47(1-2). . 39 ...
.
[MolluscaBase (2019). Pleurotomella hayesiana (Angas, 1871). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=868155 on 2019-02-03]
Description
The length of the shell attains 18 mm.
(Original description) The rather solid shell has an ovately fusiform shape. It is of a dull chalky-grey colour. The shell contains 7
whorls
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 d ...
, angulated at the upper part, closely longitudinally ribbed and transversely ridged, forming flattened nodules at the points of intersection. The
spire is sharp. The
apex is purple. The
aperture is elongately ovate, deep purple within. The outer
lip is finely denticulated at the edge, contracted below. The posterior sinus is narrow and rather deep.
Angas G.F. (1871) ''Description of thirty-four new species of shells from Australia.'' Proceedings of the Zoological Society of London, 1871: 13–21, pl. 1
Distribution
This marine species is
endemic to Australia and occurs off
New South Wales at depths between 4 m and 27 m.
References
* Beu, A.G. 2011 Marine Molluscs of oxygen isotope stages of the last 2 million years in New Zealand. Part 4. Gastropoda (Ptenoglossa, Neogastropoda, Heterobranchia). Journal of the Royal Society of New Zealand 41, 1–153
* Laseron, C. 1954. ''Revision of the New South Wales Turridae (Mollusca).'' Australian Zoological Handbook. Sydney : Royal Zoological Society of New South Wales pp. 56, pls 1–12.
External links
Seashells of New South Wales: ''Asperdaphne hayesiana''*
Gastropods.com: ''Asperdaphne (Asperdaphne) hayesiana''
{{DEFAULTSORT:Pleurotomella Hayesiana
hayesiana
Gastropods described in 1871
Gastropods of Australia