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Trichoptera: Glossosmatidae of Gunnison County, Colorado

Anagapetus debilis Saddle Case Caddis

Ross, 1938
Updated 29 Dec 2016
TSN 117154

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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.
Djerneas 2010 scanning electron microscopy of female Anagapetus sternum 5 gland

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.
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.

Brown,WS 2015 Trichoptera of Gunnison County, Colorado, USA

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