Shi-Kuei’s Tryonia (Tryonia shikueii)

This species was described in 2014, it is known from two populations inhabiting Ojo de Federico and Ojo de San Juan, two closely proximal springs in the lower Río Casas Grandes basin with water temperatures around 23 °C to 27°C.

The two localities dried out sometimes in the 1980s, which means that both populations of this species are lost leading to its extinction. [1]

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References:

[1] Robert Hershler; J. Jerry Landye; Hsiu-Ping Liu; Mauricio De la Maza-Benignos; Pavel Ornelas; Evan W. Carson: New species and records of Chihuahuan Desert springsnails, with a new combination for Tryonia brunei. Western North American Naturalist 74(1): 47-65. 2014

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edited: 02.05.2019