Juturnia brunei (Brune Spring Snail)

[surroundx]

"Tryonia brunei has been assessed as Critically Endangered under criterion B1ab(i,ii,iii). This species is only found in one spring/lake (Phantom Lake) which has an extent of occurrence of less than 100 km2 . The lake was impounded and is still undergoing declines in size and quality due to drought and water abstraction. This species was last observed in 1993 (Hershler 2001) when the lake was surveyed, but no specimens were found since then despite two targeted surveys. There is a chance that individuals survive in the marshes at the type locality, so that further surveys are recommended. In the meantime, we flag this species as possibly extinct."

Source: www.iucnredlist.org/details/summary/22423/0

[surroundx]

Cowie, Robert H., Régnier, Claire, Fontaine, Benoît, and Bouchet, Philippe. (2017). Measuring the Sixth Extinction: what do mollusks tell us? The Nautilus 131(1): 3-41.

[koeiyabe]

Hershler, Robert; Landye, J. Jerry; Liu, Hsiu-Ping; De la Maza–Benignos, Mauricio; Ornelas, Pavel; and Carson, Evan W. (2014) "New species and records of Chihuahuan Desert springsnails, with a new combination for Tryonia brunei," Western North American Naturalist: Vol. 74 : No. 1 , Article 4.
Available at: scholarsarchive.byu.edu/wnan/vol74/iss1/4