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Stoneflies - Plecoptera: Perlodidae of Gunnison County, Colorado
Isogenoides Female key to species

1a. Subgenital plate with deep V-shaped median notch.

1b. Subgenital plate truncate, without a notch.

References

Baumann,RW; Gaufin,AR; Surdick,RF 1977 The stoneflies (Plecoptera) of the Rocky Mountains. Memoirs of the American Entomological Society 31, 1-208.

Good Links

Key to Isogenoides Males of Gunnison County
Key to Isogenoides Nymphs of Gunnison County

Brown, Wendy S. 2004 Plecoptera or Stoneflies of Gunnison County, Colorado
www.gunnisoninsects.org