Isoperla irregularis

[another specialist]

Isoperla irregularis - (Klapalek, 1923)
A Stonefly

Concept Reference: Stark, B. 1996, October 12, 1998 last update. North American Stonefly List. Online. Available: www.mc.edu/campus/users/stark/stonefly.html. 1996, December 23.
Concept Reference Code: N96STA01EHUS
Name Used in Concept Reference: Isoperla irregularis

Global Status: GH
Global Status Last Reviewed: 20Sep1999
Global Status Last Changed: 20Sep1999
Rounded Global Status: GH - Possibly Extinct

Reasons:
Still known from a single specimen from Texas (locality unknown) in the 1800's. Szczytko and Stewart (1977) indicate this species may be a synonym of ISOPERLA MOHRI.

Nation: United States
National Status: NH

www.natureserve.org/explorer/servlet/NatureServe?searchName=Isoperla+irregularis

[Bowhead Whale]

Why was it called "irregularis"?

[Sebbe]

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

Isoperla mohri is now treated as an synonym of Isoperla irregularis so consequently this species is now more widely distributed.

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