Acirsa amara
Kilburn, 1985
Description:
Dimensions range from 11 mm - 12.5 mm high.
Width to height ratio: 00:1 ~ 00:1
Shell: tall and slender, acuminate; small. Exterior colour white may display brown patches on top half of whorls preceding varices, costae axial ribs white. About 13 whorls, weakly convex; protoconch evidently subcylindrical, subcylindrical with ~2 whorls smooth, inflated whorls; teleoconch with ~11 whorls convex. Suture channelled. Imperforate. Approximately 11 costae on the body whorl. Costae are broad, low, strong on earlier whorls becoming obsolete on later whorls. There are 2 - 7 varices on each whorl. The varices are low, irregularly spaced. Intercostal spaces shallow spiral grooves, number increasing on later whorls. Interstices with approximately 7 - 14 spiral striae per whorl. Base concave with coarse growth-lines. Base with 3 spiral striae, Columella callus a thin glaze. Aperture elongate oval, lip not thickened; peristome discontinuous.
Distribution:
Australia; Sydney, NSW, southern Australia to western Great Australian Bight, WA [Beechey, 2008]; Agulhas Bank, South Africa [Kilburn, 1985:343].
Habitat:
5 -183m [Beechey, 2008].
Etymology:
[greek] amara = a trench or channel - referring to suture.
Beechey, D. (2008af). pp: Acirsa amara. Fig. 1.
SE of South West Cape, Tasmania
119 m
(C.unreg)
Distribution
as listed in source literature
Type Material:
The following list brings together type material and other cited specimens as reported in the sources examined, grouped under the names and designations used in each source. The same specimen may appear in multiple entries drawn from different sources. Some entries concern other species included by authors for comparison; inclusion in this list does not imply synonymy.
Acirsa amara Kilburn, 1985HolotypeNM A2937/T2769. Agulhas Bank, off Cape St Blaize area, R. Le Maitre, South Africa. ex pisce. [Kilburn, 1985: 343].NM A2937/T2769. Agulhas Bank, off Cape St. Blaize area, South Africa. ex pisce. [Brown & Neville, 2015: 36].
Kilburn, R.N (1985).
pp: 343.
pp: 246. Plate 11, Acirsa amara sp. n..
holotype, length 11,1 mm.
Beechey, D. (2008).