Alaginella geminata

The length of the shell attains 6 mm, its diameter 4 mm.

(Original description) The biconical shell is glossy, and solid, becoming opaque in maturity and thin and translucent in youth. Its color is uniformly white. It comprises four whorls that are flattened above the shoulder and contracted at the base. Upon maturity, the spire is covered with a callus sheet that obscures the sutures, while a thicker layer extends over the body whorl ahead of the aperture. The aperture is narrow, subrostrate anteriorly, and channeled posteriorly, ascending the previous whorl. The outer lip has a thick varix externally and approximately ten evenly spaced small denticles internally. The columella features four strong elevated folds, with the posterior fold being horizontal and situated about halfway along the aperture, and the anterior fold running into the margin of the subrostrate extremity.{{cite journal |last1=Hedley |first1=C. |title=Descriptions of some new or noteworthy shells in the Australian Museum. |journal=Records of the Australian Museum |date=1912 |volume=8 |issue=3 |pages=131–160 |url=https://www.biodiversitylibrary.org/page/8056832 |access-date=16 July 2024}} {{source-attribution}}

{{cite web |last1=Alaginella geminata |title=description + image |url=https://seashellsofnsw.org.au/Marginellidae/Pages/Alaginella_geminata.htm |website=Seashells of New South Wales |publisher=Des Beechley}}

This marine species is endemic to Australia and occurs off New South Wales, Queensland, South Australia, Tasmania, Victoria and Western Australia.{{cite web |title=Alaginella geminata |url=https://biodiversity.org.au/afd/taxa/599d0150-825c-4121-a8db-4b8be66ae5ce|website=Australian Faunal Directory |publisher=Australian Government |access-date=16 July 2024}}

{{Reflist}}

• {{cite book |last1=Cossignani |first1=T. |title=Marginellidae & Cystiscidae of the World. |date=2006 |publisher=L'Informatore Piceno |pages=1–408}}
• {{cite book |last1=Wilson |first1=B. |title=Australian marine shells, Prosobranch, Gastropods |date=1994 |publisher=Odyssey Publishing |location=Kallaroo, Western Australia |pages=1–370 |edition=2}}

• {{cite journal |last1=Cotton |first1=B.C. |title=Australian Margin Shells (Marginellidae). |journal=The South Australian Naturalist. |date=1944 |volume=22 |issue=4 |url=https://www.biodiversitylibrary.org/page/42162264 |access-date=16 July 2024}}

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geminata

Category:Gastropods described in 1912

Category:Gastropods of Australia

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