Grande Stripetail Stonefly (Isoperla jewetti)
This species was described in 1976 from specimens that had been collected in 1939 from a single location in El Paso County, Texas, which is now completely destroyed by agriculture.
The species is furthermore known from a single specimen collected in Huerfano County, Colorado, and from at least six nymph specimens that were collected in Dona Ana County, New Mexico.
The Grande Stripetail Stonefly was not recorded since 1980 and is most likely extinct.
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edited: 31.10.2017
Tag Archives: Isoperla
Isoperla maxana Harden & Mickel
Minnesota Stripetail Stonefly (Isoperla maxana)
This species was described in 1952 based on a single male specimen.
The species’ name appears in lists that deal with extinct species, however, its taxonomical validity is questionable and needs a revision.
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edited: 31.10.2017
Isoperla conspicua Frison
Rare Stripetail Stonefly (Isoperla conspicua)
This species was described in 1935.
The species was endemic to Illinois, USA, it was not found since 1931, and is thus considered most likely extinct.
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edited: 31.10.2017
Isoperla emarginata Harden & Mickel
Crescent Stripetail Stonefly (Isoperla emarginata)
The Crescent Stripetail Stonefly was described in 1952 based on a single female specimen, which was collected near the city of Grande Marais in Cook County, Minnesota, USA.
The species’ name appears in lists that deal with extinct species, its taxonomical validity, however, needs a revision.
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edited: 31.10.2017