Isoperla jewetti (Grande Stripetail)

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Colorado (SH), New Mexico (SNR), Texas (SNR

Originally described from El Paso Co., Texas from specimens collected in 1939. Also listed from Huerfano Co., Colorado from a single specimen collected in 1938 by Szczytko and Stewart (1979). Both of these areas have been extensively searched for additional specimens without success. This speies may be extinct. The El Paso site has been completely destroyed by agriculture. Jacobi et al. (2005) report 6 nymph specimens from Rio Grande upstream from Radium Springs, Dona Ana Co., New Mexico collected in 1978 and 1980.

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ALBUQUERQUE, N.M. (AP) - An environmental group is suing the federal government over a rare stonefly that used to live along the Rio Grande in parts of New Mexico, Colorado and Texas but has not been seen for nearly 30 years.

WildEarth Guardians filed its lawsuit in federal court in Denver today.

It alleges that the U.S. Fish and Wildlife Service violated the Endangered Species Act when it denied a petition that sought federal protections for the Grande stripetail.

The last documented sighting of the Grande stripetail was in 1980 along the Rio Grande upstream from Radium Springs, New Mexico, when a handful of nymphs were collected.

WildEarth Guardians' wildlife program director, Nicole Rosmarino, says scientists fear the stonefly may be extinct.

www.krdo.com/Global/story.asp?S=10351081

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A Review of the Eastern Nearctic Isoperlinae (Plecoptera: Perlodidae) with the description of twenty-two new species

The Texas specimens were collected on 22 April 1939 from an irrigation ditch south of El Paso, Texas. Several attempts to recollect the species from the type locality have been unsuccessful and the species is considered extirpated at that site (Szczytko and Stewart 1979a). Additionally, several efforts to collect additional material from the La Veta Pass, Sangre de Cristo Mountains, Colorado site have also been unsuccessful. In a negative ruling on a petition to list I. jewetti as “critically imperiled” (U.S. Fish and Wildlife Service 2010) listed Radium Springs, Dona Ana Co., New Mexico as another locality based on six nymphs collected in 1978 and 1980 (Wild Earth Guardians 2009). The identification of these specimens is unconfirmed.

illiesia.speciesfile.org/papers/Monographiae-of-Illiesia.pdf