Allenella formalis
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Heterobranchia
Order: Stylommatophora
Family: Punctidae
Genus: Allenella
Species:
A. formalis
Binomial name
Allenella formalis
(Iredale, 1944)[1]
Location of Lord Howe Island
Synonyms
  • Allentula formalis (Iredale, 1944)

Allenella formalis, also known as the brown turban pinhead snail, is a species of land snail that is endemic to Australia's Lord Howe Island in the Tasman Sea.[2]

Description

The globosely turbinate shell of the mature snail is 2.5–2.6 mm in height, with a diameter of 3.4–3.6 mm, and a moderately raised conical spire. It is amber to dark brown in colour. The whorls are rounded above and below a slightly angular periphery, with impressed sutures and closely spaced radial ribs. It has an ovately lunate aperture and narrowly open umbilicus. The animal is dark brown with a paler brown sole.[2]

Distribution and habitat

The snail occurs on the summits and upper slopes of the island's southern mountains.[2]

References

  1. ↑ Iredale, Tom (1944). "The land Mollusca of Lord Howe Island". Australian Zoologist. 10 (3): 299–334.
  2. 1 2 3 Hyman, Isabel; Köhler, Frank (2020). A Field Guide to the Land Snails of Lord Howe Island. Sydney: Australian Museum. ISBN 978-0-9750476-8-2.
  • MolluscaBase eds (2021). "Allenella formalis Iredale, 1944". MolluscaBase. Flanders Marine Institute. Retrieved 2021-08-08. {{cite web}}: |author= has generic name (help)
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