Renea moutonii singularis

Renea moutonii singularis is a subspecies of land snail with an operculum, a terrestrial gastropod mollusk in the family Aciculidae.[1] It was described by Pollonera in 1905. The common name is needle snail.[2]

Renea moutonii singularis
Shell of Renea moutonii singularis (specimen at MNHN, Paris)
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Caenogastropoda
informal group Architaenioglossa
Superfamily:
Cyclophoroidea
Family:
Aciculidae
Genus:
Renea
Species:
R. singularis
Binomial name
Renea singularis
Trinomial name
Renea moutonii singularis
Pollonera, 1905
Synonyms
  • Caziotia singularis Pollonera, 1905 ·(basionym)
  • Renea (Caziotia) singularis (Pollonera, 1905) (unaccepted combination and rank)
  • Renea singularis (Pollonera, 1905)
  • Renea singularis singularis (Pollonera, 1905)

Distribution

This subspecies is endemic to France. It has a very narrow distribution, being found only in the Alpes-Maritimes, in the Loup and Siagne valleys.[3] Because of its limited distribution and rarity within its range it is considered threatened. The IUCN red list of endangered species lists it as vulnerable.[1]

Description

These snails are between 3 and 4 mm long and 1.1 to 1.3 mm wide. Their elongated shells are light brown with fine ribbing (60-70 ribs with a penultimate whorl). The apertural margin in lateral view is oblique / and (-shaped, with an exaggerated sinulus, and a P-like opening at the suture in the last quarter of the last whorl. There is no cervical callus. The apertural margin can be thick.[3]

R. moutoni singularis is possibly the end of an evolutionary line that begins with an almost straight apertural margin (in lateral view) towards a much more oblique and protruded margin with the needle snail having the longest sinulus along the suture.[3]

References
  1. Bouchet, P.; Seddon, M.B. (1996). "Renea moutonii ssp. singularis". IUCN Red List of Threatened Species. 1996: e.T19430A8890560. doi:10.2305/IUCN.UK.1996.RLTS.T19430A8890560.en. Retrieved 12 January 2020.
  2. Conchology Inc http://www.conchology.be/?t=68&u=824619&g=fd769883d258b1abcd889fd40a63f641&q=99b5128779de6c5043dc19891a988bcc retrieved 12 June 2015
  3. Goettingen University AnimalBase http://www.animalbase.uni-goettingen.de/zooweb/servlet/AnimalBase/home/species?id=2827 retrieved 12 June 2015
  • Bank, R. A.; Neubert, E. (2017). Checklist of the land and freshwater Gastropoda of Europe. Last update: July 16th, 2017
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