Crosseola inverta

Crosseola inverta is a species of small sea snail or micromollusc, a marine gastropod mollusc in the family Conradiidae.[1]

Crosseola inverta
Shell of Crosseola inverta (specimen at MNHN, Paris)
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Vetigastropoda
Order: Trochida
Superfamily: Trochoidea
Family: Conradiidae
Genus: Crosseola
Species:
C. inverta
Binomial name
Crosseola inverta
(Hedley, 1907)
Synonyms

Crossea inverta Hedley, 1907 (original combination)

Description

(Original description by Charles Hedley) The height of the shell measures 2.45 mm, its diameter 2.65 mm. The very solid, milk-white shell has a biconical shape. The base of the shell is produced, much exceeding the spire, which is low and gradate. The shell contains four whorls, the first minute, unsculptured, the others rapidly increasing in size, parted by channelled sutures.

Sculpture : the upper whorls carry three thick, elevated, spiral ribs, divided by broad, deep grooves. These vanish on the body whorl, which is entirely covered by dense, microscopic spirals so crossed by radials as to give the effect of fine punctures over the whole surface. The basal funicle is massive, coiled on the body whorl like a subsidiary whorl, far extended anteriorly, its truncate extremity excavate. A small perforation occurs below the subcircular aperture in the base of the funicle. The simple outer lip simple is inner reflected over the umbilicus. The umbilicus has superiorly a narrow spiral perforation, inferiorly a trough hollowed between the columella and the funicle.[2]

Distribution

This marine species is endemic to Australia. It occurs off Queensland.

References
  1. MolluscaBase (2019). MolluscaBase. Crosseola inverta (Hedley, 1907). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=1381388 on 2020-01-27
  2. Charles Hedley, The Mollusca of Mast Head Reef, Capricorn Group, Queensland. Part II; Proceedings of the Linnean Society of New South Wales v. 32 (1907)
  • Cotton, B.C. 1959. South Australian Mollusca. Archaeogastropoda. Handbook of the Flora and Fauna of South Australia. Adelaide : South Australian Government Printer 449 pp.
  • Rubio F. & Rolán E. (2019). New species of Conradiidae Golikov & Starobogatov, 1987 (= Crosseolidae Hickman, 2013) (Gastropoda: Trochoidea) from the Tropical Indo-Pacific II. The genus Crosseola and the description of Crossolida n. gen. Novapex. 20(3): 49-91
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