Trichoptera: Glossosmatidae of Gunnison County, ColoradoAnagapetus debilisSaddle Case CaddisRoss, 1938Updated 26 March 2026
TSN 117154 Good LinksOn this website:Glossosoma introduction Other Websites: Photos, Map, Taxon Identifier Numbers - from the Global Biodiversity Information Facility Anagapetus debilis at GBIF Photos, Map, Museum specimens, DNA - Barcodinglife.org ReferencesAnderson,NH 1976 The distribution and biology of Oregon Trichoptera. Agricultural Experiment Station, Oregon State University. Technical Bulletin, 134. PDF Anderson,NH and Bourne,JR 1974 Bionomics of three species of glossosomatid caddis flies (Trichoptera: Glossosomatidae) in Oregon. Canadian Journal of Zoology, 52(3), pp.405-411. Abstract: "The life cycles of three species of caddis flies of the family Glossosomatidae, Anagapetus bernea Ross, Agapetus bifidus Denning, and Glossosoma penitum Banks, are compared based on monthly collections from Oak Creek and Berry Creek, Benton County, Oregon. Glossosoma penitum, the most abundant species, is bivoltine with overlapping summer and winter generations. Anagapetus bernea and A. bifidus are univoltine with the former being a winter-growing species, and the latter a summer species. Differences in habitat preference occurred, though all three species were collected within a single square meter. Agapetus bifidus is more common in the slower water of glides, whereas G. penitum and A. bernea occur chiefly on the riffles. Anagapetus bernea is more restricted to the headwater regions and small side branches than is G. penitum. A key is provided to distinguish larvae of the three species and the cases are illustrated." Djernæs,M 2010 Morphology, function and evolution of the sternum V glands in Amphiesmenoptera. PhD thesis, University of Alberta. 368 pages. PDF Quote from page 29: Both male and female Anagapetus debilis (Glossosomatidae) have the gland opening situated on a triangular protuberance with reticulated cuticle (Figure 2-22 A). The reticulation consists of raised walls (Figure 2-22 B), not restricted to the borders between individual epidermal cells, and so is quite different from the scaly cuticle found in many annulipalpians. 
Djernæs,M 2011 Structure and phylogenetic significance of the sternum V glands in Trichoptera Zootaxa 2884: 1-60. PDF Jones,TS and Resh,VH 1988 Movements of adult aquatic insects along a Montana (USA) springbrook. Aquatic insects, 10(2) 99-104. PDF Abstract: " The occurrence and movement patterns of adult insects along a forested springbrook near Flathead Lake, Montana, USA, were studied during three 15-day periods from 19 June through 9 August 1985, using a two-sided Malaise trap. Of the Plecoptera, numbers of males and gravid females of Malenka flexura gravid females of Zapada frigida and total numbers of Paraperla wilsoni were significantly higher for downstream-flying adults during one to three periods. Of the Trichoptera, numbers of males of Anagepetus debilis were significantly higher for upstream flying adults during one period, and males of Lepidostoma cascadense and gravid females of L. spicata were significantly higher for downstream-flying adults during another period. In none of the 26 species examined in these three orders did females show a statistically significant pattern of upstream flight." Ross,HH 1938 Descriptions of Nearctic Caddisflies with special reference to the Illinois species. Bulletin of the Illinois Natural History Survey 21:101-183. PDF Described as Agapetus debilis.    Ross,HH 1951 The caddisfly genus Anagapetus (Trichoptera: Rhyacophilidae). Pan-Pacific Entomologist 27: 140-144. Ruiter,D 2004 A review of the adult Anagapetus (Trichoptera: Glossosomatidae). Western North American Naturalist, 64(4) 454-464. PDF Quote from pages 462-463: "Anagapetus debilis Ross 1938 (Fig. 8) The holotype is from Logan River Canyon, Cache County, Utah. The male is distinguished by the combination of deeply cleft inferior appendages, segment 10 about twice as long as tall, and interior surface of apicodorsal arm of each inferior appendage covered with a scurf of downward-directed setae. The mesal process at the base of each inferior appendage is bifid at the apex and curved caudomesad. This results in the distinction between the figures of Ross (1938) and Schmid (1982). Depending on position at preservation, the bifid apex is more or less visible. Clavate hairs are present on the lateral margin of segment 9, not as figured by Ross (1938). Some specimens have a row of minute spines on the mesal surface of segment 10. In lateral view the distal portion of female segment 9 is longer than tall. The transverse apicoventral margin is nearly linear, and the apicodorsal margin is slightly cleft. " Schmid,F 1982 Revision des Trichoptères Canadiens: II. Les Glossosomatidae et Philopotamidae (Annulipalpia). Memoirs of the Entomological Society of Canada, 114(S122), 1-76. Wiggins,GB 1996 Larvae of the North American Caddisfly Genera (Trichoptera). 2nd Edition. University of Toronto Press, 457 pages. Zuellig,RE; Heinold,BD; Kondratieff,BC and Ruiter,DE 2012 Diversity and Distribution of Mayflies (Ephemeroptera), Stoneflies (Plecoptera), and Caddisflies (Trichoptera) of the South Platte River Basin, Colorado, Nebraska, and Wyoming, 1873-2010. U.S. Geological Survey Data Series 606, 257 p. PDF Quote from page 63: "This species is seldom collected in large numbers." Brown,WS 2015 Trichoptera of Gunnison County, Colorado, USA www.gunnisoninsects.org " Extreme ironing combines the thrills of an extreme outdoor activity with the satisfaction of a well-pressed shirt. " |