Stoneflies - Plecoptera: Perlodidae
Isogenoides elongatus - Elongate Springfly(Hagen, 1874)
Updated 29 April 2013
HabitatNymphs live under stones in riffles.
Life HistoryRichardson and Gaufin found this species was carnivorous - 65% animal matter, 35% plant material in gut contents. They ate mostly smaller animals such as Simuliidae (black fly) and Chloroperlidae larvae. Ephemeroptera (mayflies) and Trichoptera (cadisflies) were found in smaller numbers.
Locations CollectedSlate River, Lake Fork
NotesOlder publications may refer to this species as Isogenus elongatus.
Good LinksOn this website:
Key to Perlodidae Nymphs
Introduction to Isogenoides
Drumming - from Jon Sandburg's website
ReferencesBaumann,RW, Gaufin,AR and Surdick,RF 1977 The stoneflies (Plecoptera) of the Rocky Mountains. Memoirs of the American Entomological Society 31, 1-208.
Quote from page 127: " This species is often associated with Isogenoides colubrinus. It is common in rivers and large creeks. The adults emerge from May to July. "
Corkum LD and Clifford HF 1980 The importance of species associations and substrate types to behavioural drift. Pages 331-341 in Flannigan JF; Marshall KE. Advances in Ephemeroptera Biology. Plenum Press, New York. PDF
Corkum LD and Clifford HF 1981 Function of caudal filaments and correlated structures in mayfly nymphs, with special reference to Baetis (Ephemeroptera). Quaestiones Entomologicae 17:129-146. PDF
Hagen, HA, 1874 Report on the Pseudo-neuroptera and Neuroptera collected by Lieut. W.L. Carpenter in 1873 in Colorado. Annual Report of the U.S. Geological and Geographical Survey of the Territories, embracing Colorado, 7: 571-577.
Described as Isogenus elongatus.
Klapálek, Frantisek 1912 Plécoptères. I. Fam. Perlodidae; [monographische Revision. II. Fam. Perlidae; Subfam. Perlinae, Subfam. Neoperlinae; mongraphische Revision] Series Sélys-Longchamps, Edmond de, baron, 1813-1900. Collections zoologiques; catalogue systematique et descriptif, fasc. 4, pt. 1-2.
Discussed as Isogenoides elongatus.
Kondratieff,BC and Baumann,RW 2002 A review of the stoneflies of Colorado with description of a new species of Capnia (Plecoptera: Capniidae). Transactions of the American Entomological Society 128 (3) 385-401.
Quote from page 397: "Historically, this species occurred in several Front Range rivers, such as the Cache la Poudre and South Platte, but has apparently been extirpated by irrigation practices and pollution. This species is common in the midlle portion of the Colorado River (Eagle and Garfield counties) and the Gunnison River (Delta Co.), and can be found in the larger streams of the Mountain and Plateau regions. "
Richardson,JW and Gaufin,AR 1971 Food habits of some western stonefly nymphs. Transactions of American Entomological Society 97: 91-121.
Discussed as Isogenus elongatus.
Sandberg, J.B. and K.W. Stewart. 2004 Capacity for extended egg diapause in six Isogenoides Klapálek species (Plecoptera: Perlodidae). Transactions of the American Entomological Society 130(4): 411-423. PDF
Sandberg,JB and Stewart,KW 2005a Vibrational communication (Drumming) of the nearctic stonefly genus Isogenoides (Plecoptera:Perlodidae). Transactions of American Entomological Society 131 1+2, 111-130. PDF
Sandberg,JB and Stewart,KW 2005b Holomorphology and systematics of the stonefly genus Isogenoides (Plecoptera: Perlodidae). Transactions of the American Entomological Society 131 3+4, 269-345.
Stewart,KW and Zeigler,DD 1984 Drumming behavior of twelve North American stonefly (Plecoptera) species: First descriptions in Peltoperlidae, Taeniopterygidae and Chloroperlidae. Aquatic Insects. 6(1) 49 - 61. Abstract
Part of abstract: " "
Brown, WS 2004 Plecoptera of Gunnison County, Colorado