Tag Archives: spiraxidae

New spiraxid species from Mexico

In a hitherto overlooked paper, a new species belonging to the Spiraxidae is described from Mexico.

The abstract reads: “A new land snail, Guillarmodia (Guillarmodia) marcelae n. sp.,
Correa-Sandoval, Barrientos-Lozano & Strenth is described from the
mountains of Sierra Los Soldados state of Tamaulipas in northeastern
Mexico. This new species differs from other regional species of
Guillarmodia by its smaller size and distinctive subsutural striations.
Habitat information of the species and geographic distribution of related
taxa are provided.”

Schermafbeelding 2018-09-18 om 19.43.04

The new species is described from an area where the topography facilitates ecological isolation and fragmentation of habitats. For that reason it would be good if this fauna is evaluated from a conservasion viewpoint.

Reference:
Correa-Sandoval, A. et al., 2017. A new species of the genus Guillarmodia (Mollusca: Gastropoda: Pulmonata: Spiraxidae) from northeastern Mexico. – Acta Zoologica Mexicana Nueva Serie, 33 (3): 450-453.

Advertisements

Champion shells

Ever heard of ‘champion shells’…? I had not, but since yesterday someone told me of ‘champion trees’ in England, I got the context… the biggest, largest. It must be a human fascination…;-)

Anyhow, I the most recent number of Shell-O-Gram, the newsletters from the Jacksonville Shell Club, I noticed an article by Harry Lee about a giant shell from Mexico.

“In the March-April SOG, a new species of Euglandina from southeastern Mexico was treated. It belonged to a truly remarkable group of carnivorous snails mostly from the highlands of Mexico and Central America – some of which exceeded four inches in height. Through the magic of the Internet, a concatenation of subsequent events led to the discovery of a truly remarkable mollusk shell belonging to a closely related species, also apparently limited to Mexico. The specimen figured above is believed to be the largest native terrestrial snail shell ever found in North America, which includes Central America.

Before the discovery of this leviathan, the largest known shell belonged to a congener, but it was not identified as to species (see sweepstakes tabulation on p. 9 taken mostly from the literature cited below). Now the sweepstakes winner is clearly Sr. Vinagrillo’s specimen. Olé!”.

Reference:
Lee, H.G., 2017. Euglandina sowerbyana (L. Pfeiffer, 1846) – a true champion shell. – The Shell-O-Gram, 58 (3): 8-9.

New land snails from French Guiana

Published just before the end of the year, Gargominy & Muratov described three new land snails from French Guiana; one of these species is placed in a new genus.

This is the first paper on the malacofauna of this country after the recent revision of Massemin et al. (2009), in which the first author covered the land snails. Material obtained from sieved leaf litter and soil collected during 1997 and 1999 yielded three new species so far; however, many of the micromolluscs then collected prove to be new to science but still await description. More papers are thus to be expected.

The abstract of the paper is:
Three new species and a new genus of terrestrial gastropods are described from the Reserve naturelle des Nouragues in French Guiana. Cyclopedus anselini n. gen., n. sp. (forming new monotypical genus in the family Neocyclotidae Kobelt & M??llendorff, 1897) seems to be the smallest known cyclophoroid in the western hemisphere. The descriptions of the other two new species, Pseudosubulina theoripkeni n. sp. and P. nouraguensis n. sp., from the family Spiraxidae Baker, 1939, extend not only our knowledge of the geographical distribution of Pseudosubulina Strebel & Pfeffer, 1882 (previously known with certainty from Mexico only) but also the diagnosis of this genus, which now includes species with large penial stimulator and apertural dentition.

Screen_shot_2013-01-02_at_21

Cyclopedus anselini n. gen., n. sp.

0screen_shot_2013-01-02_at_21

Pseudosubulina theoripkeni n. sp.

1screen_shot_2013-01-02_at_21

Pseudosubulina nouraguensis n. sp.

Reference:
Gargominy, O. & Muratov, I., 2012. New taxa of land snails from French Guiana. – Zoosystema 34: 783-792.