Tag Archives: Lymnaeidae

Lantzia carinata Jousseaume

Keeled Lantzia Snail (Lantzia carinata)

The Keeled Lantzia Snail was described in 1872; it is (or probably was) restricted to a single locality on the island of Réunion in the Indian Ocean.

The species inhabited wet moss that grew along a waterfall in the interior of the island at an elevation of 1200 to 1300 m above sea level.

The Keeled Lantzia Snail was thought to have gone extinct sometimes during the early 19th century but was rediscovered in 199; however, it seems to have disappeared again and is now most likely indeed extinct.

*********************

Depiction from: ‘F. P. Jousseaume: Description de quatre mollusques nouveaux. Revue et magasin de zoologie pure et appliquée, series 2(23): 5-15. 1872’

(public domain)

*********************

edited: 21.08.2022

Pseudisidora rubella (Lea)

Reddish Lymnaea Snail (Pseudisidora rubella)

The Reddish Lymnaea Snail was described in 1841; the species was originally found on all of the Hawaiian main islands where it mainly inhabited streams but was also found in pools or on the wet rocky surfaces below waterfalls. Its biology is not well-known, but it probably fed on algae.

The shells of this species are dextral, they reach heights of up to 1,3 cm.

The Reddish Lymnaea Snail is now extinct.

*********************

References:

[1] Carl C. Christensen: Type species designation for Pelagolimnaea Germain, 1928, and a correction regarding the type species of Pseudisidora Thile, 1931 (Gastropoda: Basommatophora: Lymnaeidae). Records of the Hawaii Biological Survey for 2014. Part I: edited by Neal L. Evenhuis & Scott E. Miller. Bishop Museum Occasional Papers 116: 53–56. 2015

*********************

edited: 01.08.2022

Fossaria cyclostoma Walker

Bugle Fossaria (Fossaria cyclostoma)  

This freshwater snail is known only from several relict populations from disjunct, in other words disconnected areas in the US-American states of Michigan and New York.  

The shell reached a height of about 0,75 cm.  

The species is now considered extinct.  

*********************

Depiction from: ‘Bryant Walker: New Michigan Lymnaeas. The Nautilus 22: 4-9/16-19. 1908’  

(not in copyright)

*********************

edited: 07.11.2020