Alopia nixa

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Alopia nixa
Alopia nixa 001.jpg
Shell of Alopia nixa (specimen at Collection Mollusca SMF - Senckenberg)
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Order: Stylommatophora
Family: Clausiliidae
Genus: Alopia
Species:
A. nixa
Binomial name
Alopia nixa
(M. Kimakowicz, 1894)
Alopia-fussi-map-eur-nm-moll.jpg
Synonyms
  • Alopia (Alopia) nixa(M. Kimakowicz, 1894) · alternative representation
  • Clausilia (Alopia) canescens nixaM. Kimakowicz, 1894
  • Clausilia (Alopia) nixaM. Kimakowicz, 1894 superseded combination (basionym)

Alopia nixa is a species of small, tropical, air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Clausiliidae. [1]

Contents

Subspecies

Description

(Description originally in German of Clausilia (Alopia) nixa) The length of the shell varies between 12 mm and 15 mm, its diemater between 3.5 mm and 4.2 mm.

The shell is either dextral or sinistral. it has a swollen spindle shape. It is slightly fragile and barely translucent, featuring a faint to matte gloss. The base color varies from reddish-brown to brown-violet, with a well-developed opaque surface layer that appears as dull light blue or blue-white on the middle whorls, occasionally allowing the base color to show through in spots. The upper whorls are glossier, ranging from reddish-brown to chestnut-brown, and the last whorl near the aperture displays a yellowish-white band. A fine whitish suture thread is often faint or barely visible.

The sculpture on the middle whorls consists of weak to indistinct growth lines, becoming more pronounced at the suture of the upper whorls, giving it a faintly crenulated appearance. On the body whorl, especially near the aperture, these lines transition into dense, fairly strong, yet slightly uneven ribbed streaks. The slightly convex spire consists of 8.5 flatly rounded whorls, separated by a shallow suture. The body whorl rises very little or not at all at the front and is somewhat compressed into a weak basal keel around the umbilical slit.

The pear-shaped aperture recedes slightly at the bottom, with a fairly wide, angular sinulus that is barely raised. The yellowish-brown lip is continuous, briefly detached or applied, and generally well-spread. The interior is subtly and lightly lipped, with a faint callus above the sinulus. The clausilium is composed of only the upper and lower lamella, which, while short, are already fairly well-developed. [2]

Distribution

This species occurs in Romania. [1]

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References

  1. 1 2 Alopia nixa (M. Kimakowicz, 1894) . 5 September 2024. Retrieved through: World Register of Marine Species .
  2. ↑ Rossmässler, E. A. (Emil Adolf), Kobelt, Wilhelm, Haas, Fritz, Hesse, P. Rolle, Hermann. Wagner, J. A. (1893–1896). Iconographie der Land- und Süsswasser-Mollusken. Dresden: Arnoldische Buchh. pp. 21–22. Retrieved 5 September 2024.{{cite book}}: CS1 maint: date format (link) CS1 maint: multiple names: authors list (link)PD-icon.svg This article incorporates text from this source, which is in the public domain .
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