Acrilla crebrilamellata

Acrilla crebrilamellata is an extinct species of sea snail, a marine gastropod mollusk in the family Epitoniidae, the wentletraps.[1]

Acrilla crebrilamellata
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Superfamily: Epitonioidea
Family: Epitoniidae
Genus: Acrilla
Species:
†A. crebrilamellata
Binomial name
†Acrilla crebrilamellata
(Tate, 1890)
Synonyms
  • † Scalaria (Acrilla) crebrilamellata (Tate, 1890) superseded combination

Description

The length of the shell is up to 9 mm, its diameter 2 mm.

(Original description) The rather thi shell is very slender and is imperforate. It contains nine flat whorls with a slightly channelled suture. The protoconch contains 2+1⁄2 whorls, the anterior one much contracted and ornamented with crowded oblique threadlets, the next is inflated and smooth ending in a bulbiform tip.

The transverse sculpture consists of oblique, crowded, short, erect lamellae, which are usually so dense as to conceal the suture and the spiral sculpture. The latter consists of five, equidistant, equal, narrow, elevated, flat-edged lines. The body whorl shows six spiral lines, the anterior one interrupting the convexity of the base. The base shows a strong spiral thread and is radially striate. [2]

Distribution

Fossils of this marine species have been found in Eocene strata in Victoria, Australia.

References
  1. WoRMS. "Acrilla crebrilamellata (Tate, 1890) †". World Register of Marine Species. Retrieved 14 March 2024.
  2. Tate, R. (1890). The gastropods of the older Tertiary of Australia - Part 3. Transactions of the Royal Society of South Australia. 14(2): 185-235, pls 5-13 This article incorporates text from this source, which is in the public domain.


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