Trichoptera: Limnephilidae of Gunnison County, Colorado
Hesperophylax designatus (Walker, 1852)
Silver Striped Sedge, Silver Striped Caddis Fly
Updated 26 July 2017
On this website:
Introduction to the Limnephilidae
Photos, Map, Museum specimens, DNA - Barcodinglife.org
Photos, information - Bugguide.net
Dodds,GS and Hisaw,FL 1925 Ecological studies on aquatic insects. III. Adaptations of caddisfly larvae to swift streams. Ecology 6(2)123-137. Abstract and first page
Erman,NA 1989 Species composition, emergence, and habitat preferences of Trichoptera of the Sagehen Creek Basin, California, USA. The Great Basin Naturalist, 186-197. PDF
The author noted H. designatus adults emerged shortly before an intermittent stream dried.
Gee, WP 1911 The oenocytes of Platyphylax designatus Walker. The Biological Bulletin 21: 222-234. PDF
Herrmann,SJ; Ruiter,DE and Unzicker,JD 1986 Distribution and records of Colorado Trichoptera. Southwestern Naturalist 31 4, 421-457. Abstract and first page
Holzenthal,RW; Blahnik,RJ; Prather,AL and Kjer,KM 2007 Order Trichoptera Kirby, 1813 (Insecta), Caddisflies. Zootaxa, 1668: 639-698. PDF
Illustration of H. designatus adult on page 641, Figure 3.
Myers,MJ and Resh,VH 2002 Trichoptera and other macroinvertebrates in springs of the Great Basin: species composition, richness, and distribution. Western North American Naturalist 62(1) 1-13. PDF
Quote from page 6: "We collected a total of 58 different species in 14 different families of caddisflies (Table 5). Four to 18 species were found in a spring. Several springs had very similar physicochemical characteristics; however, none had identical trichopteran composition. Although Lepidostoma cascadense and Rhyacophila brunnea were restricted to cold springs, they were collected from the most springs (12 each). Lepidostoma rayneri, L. roafi, and L. unicolor were also frequently collected (10, 8, and 7 springs, respectively). Across the region (including all 170 springs surveyed), Hesperophylax designatus was the most commonly encountered caddisfly. It was found in temporary springs, springs impacted by grazing, very cold springs at high elevations, and a few of the warmer (14°C), low-elevation springs. Of the 28 springs intensively studied, it was present in 11."
Parker, CR and Wiggins,GB 1985 The nearctic caddisfly genus Hesperophylax (Trichoptera: Limnephilidae). Canadian Journal of Zoology 61(10)2443-2472.
Abstract: " Seven species of Hesperophylax are recognized: alaskensis (Banks), consimilis (Banks), designatus (Walker), magnus Banks, minutus Ling, occidentalis (Banks), and mexico n.sp. Hesperophylax alaskensis is reestablished as a valid species distinct from occidentalis. Hesperophylax incisus Banks is placed as a junior subjective synonym of designatus. Hesperophylax oreades Saether is placed as a junior subjective synonym of Psychoronia costalis (Banks). Keys are provided for identification of males, females, and larvae. A hypothesis of phylogeny is proposed in which consimilis is the sister group of all other Hesperophylax; magnus and mexico are sister species and together are the closest relatives of occidentalis, designatus, and alaskensis; designatus and alaskensis are sister species. An interpretation of biogeography is offered, suggesting how geological events affected the origin and distribution of Hesperophylax species. Data on food, life cycle, habitat, and distribution are given. All species appear to be univoltine with extended flight periods. Larvae are opportunistic omnivores, but magnus is more predaceous than the other species. Differences in mandibular morphology between consimilis and the other species are not reflected in the food habits of the larvae. Among Trichoptera the species of Hesperophylax are little differentiated morphologically and most species vary within unusually broad limits; most species occur in a wider range of habitat types than do other Trichoptera. Perhaps those factors represent a genetic plasticity selected for generalized adaptability rather than the habitat specialization of other Trichoptera."
Rader RB and Ward JV. 1988 Influence of regulation on environmental conditions and the macroinvertebrate community in the upper Colorado River. Regulated Rivers: Research and Management 2:597-618.
Quote from page 611: "The reference site was represented by twelve species of caddisflies, including relatively abundant populations of Arctopsyche grandis and Rhyacophila acropedes. Trichopterans at the regulated site, however, were represented by nine rare and three slightly more abundant caddisflies (Hydroptila sp., Brachycentrus americanus, and Hesperophylax designatus). The abundance of net-spinning caddisflies was significantly reduced in the regulated site compared to both reference and recovery locations (p=0.05), as has been reported by several workers (Armitage and Capper, 1976; Müller, 1962; Ward, 1987). "
Vorhies,CT 1908 Studies on the Trichoptera of Wisconsin. PhD Thesis. 1909 Transactions of the Wisconsin Academy of Sciences Arts and Letters 16: 647-738. PDF
Discussed as Platyphylax designatus.
Plate LII was a poor scan, couldn't see the characters described
Vorhies,CT 1905 Habits and anatomy of the larva of the caddis-fly, Platyphylax designatus, Walker. Transactions of the Wisconsin Academy of Arts and Sciences 15:108-123. Google books
Walker, F. 1852 Cataloque of the Specimens of Neuropterous Insects in the Collection of the British Museum, Part I: Phryganides-Perlides. London, British Museum.