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Trichoptera: Lepidostomatidae of Gunnison County, Colorado

Lepidostoma unicolor

(Banks, 1911)
Updated 26 July 2017
TSN 116821

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Lepidostoma Introduction

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University of Alberta Entomology Collection Species page
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Anderson,NH; Sedell,JR Roberts,LM and Triska,FJ 1978 The role of aquatic invertebrates in processing of wood debris in coniferous forest streams. American Midland Naturalist 100(1) 64-82. Abstract and first page.

Banks,N 1911 Descriptions of new species of North American Neuropterid Insects. Transactions of American Entomological Society 37, 335-360.
     Described as Mormomyia unicolor.

Grafius,E and Anderson,NH 1980Populations dynamics and role of two species of Lepidostoma (Trichoptera: Lepidostomatidae) in an Oregon coniferous forest stream. Ecology 61(4) 808-816. Abstract and first page

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."

Ruesink,JL and Srivastava,DS 2001 Numerical and per capita responses to species loss: mechanisms maintaining ecosystem function in a community of stream insect detritivores. Oikos 93(2)221-234.
     Abstract: " We experimentally reduced the diversity of detritivorous stream insects in field enclosures, and measured the effects on an ecosystem function, processing of leaf litter. Two dominant species were removed separately, the stonefly Pteronarcys californica and the caddisfly Lepidostoma unicolor. In principle, processing could be maintained after species loss in two ways: the remaining species could increase their rates of shredding (per capita response), or they could increase in abundance (numerical response). We imposed a numerical response in some treatments by experimentally increasing abundances of either all the remaining species or the other dominant species so that expected metabolic capacity of the assemblage returned to full-diversity levels. Numerical responses were generally effective in maintaining leaf breakdown when either Lepidostoma or Pteronarcys was removed, except that the treatment in which Lepidostoma was replaced by an equivalent metabolic capacity of all remaining species showed less leaf loss than the full-diversity treatment. Per capita responses by other species appeared effective in compensating for the removal of Pteronarcys (although there were other explanations) but were not effective in compensating for the removal of Lepidostoma. In summary, the consequences of reduced biodiversity varied with which species was lost and how the remainder responded. Thus there was no simple relationship between biodiversity and ecosystem functioning. However, when numerical or per capita compensation does occur, stability of function should rise with diversity in such "interactive" assemblages."

Weaver III, JS. 1983 The evolution and classification of Trichoptera, with a revision of the Lepidostomatidae and a North American synopsis of this family. Ph.D. dissertation, Clemson Univ. Clemson, South Carolina 411 pages.

Weaver,JS 1988 A synopsis of the North American Lepidostomatidae (Trichoptera). Contributions of the American Entomological Institute 24 (2).

Brown,WS 2005 Trichoptera (Caddisflies) of Gunnison County, Colorado, USA