Stoneflies - Plecoptera: Nemouridae of Gunnison County, Colorado
Podmosta delicatula - Delicate ForestflyClaassen 1923
Updated 19 Feb 2019
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ReferencesBaumann,RW, Gaufin,AR and Surdick,RF 1977 The stoneflies (Plecoptera) of the Rocky Mountains. Memoirs of the American Entomological Society 31, 1-208. PDF
Quote from page 37: "The nymphs are common in creeks and rivers throughout their range. The adults emerge from April to August."
Caruso,C and Wichard,W 2010 Overview and descriptions of fossil stoneflies (Plecoptera) in Baltic Amber. Entomologie Heute, (22) 85-97. PDF
Abstract: Three new fossil species of stoneflies (Plecoptera: Nemouridae and Leuctridae) from Eocene Baltic amber are being described: Zealeuctra cornuta n. sp., Lednia zilli n. sp., and Podmosta attenuata n. sp.. Extant species of these three genera are found in Eastern Asia and in the Nearctic region. It is very probable that the genera must have been widely spread across the northern hemisphere in the Cretaceous period, before Europe was an archipelago in Eocene. The current state of knowledge about the seventeen Plecoptera species of Baltic amber is shortly presented. Due to discovered homonymies, the following nomenclatural corrections are proposed: Leuctra fusca Pictet, 1856 in Leuctra electrofusca Caruso & Wichard, 2010 and Nemoura affinis Berendt, 1856 in Nemoura electroaffinis Caruso & Wichard, 2010.
Chen,ZT 2018 Females of the genus Podmosta (Plecoptera: Nemouridae): comparison of terminalia and a new female record in Baltic Amber. Zootaxa, 4407(2)293-297. PDF
Claassen,PW 1923 New species of North American Plecoptera. Canadian Entomologist 55, 257-263,281-292.
Duffield,RM and Nelson,CH 1998 Stoneflies (Plecoptera) in the diet of brook trout (Salvelinus fontinalis Mitchell) in Libby Creek, Wyoming, USA. Hydrobiologia 380, 59-65.
"The Nemouridae were represented by five species in the stomach samples. Malenka flexura, Podmosta decepta, P. delicatula, Zapada cinctipes, and Z. haysi."
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 American Entomological Society 128 3, 385-401.
Quote from page 392: " Podmosta delicatula is much more common than P. decepta and occurs in similar habitats."
Mihuc,TB; Mihuc,JR 1995 Trophic ecology of five shredders in a Rocky Mountain stream. Journal of Freshwater Ecology 10 3, 209-216. PDF
Abstract: " The trophic ecology of five shredder taxa found in Mink Creek, Idaho was determined in laboratory food quality experiments to assess the obligate or facultative nature of resource utilization among lotic taxa commonly referred to as detritivores. The experiments tested resource assimilation for each taxon among three major resources available to primary consumers in streams; periphyton, fine particulate detrital material (FPM) and coarse particulate detrital material (CPM). Growth of each taxon was determined on each resource in laboratory experiments conducted at 10° C.
Growth results indicate that only one of the five taxa (middle-late instar Dicosmoecus atripes) was an obligate CPM detritivore. The remaining four taxa (Amphinemura banksi, Lepidostoma sp., Podmosta delicatula, and Zapada cinctipes) were generalists capable of growth on at least two of the three resource types. All four generalists exhibited growth on periphyton and CPM resources suggesting that these taxa can utilize both autochthonous and allochthonous resources. Our results do not support the idea that taxa with similar mouthpart morphology, specifically shredders, exhibit similar trophic relationships."
Peckarsky,BL 1985 Do predaceous stoneflies and siltation affect the structure of stream insect communities colonizing enclosures? Canadian Journal of Zoology 63, 1519-1530.
Ricker,WE 1992 Origin of stonefly names proposed by Ricker and collaborators. Perla, 18(1) 12 pages. PDF
Quote from page 8: "Podmosta Ricker 1952 (as sg. of Nemoura). Russian pod = under, most = bridge. A good place to find adult stoneflies is under bridges that have smooth concrete walls. "
Ruse,LP and Herrmann,SJ 2000 Plecoptera and Trichoptera species distribution related to environmental characteristics of the metal-polluted Arkansas River, Colorado. Western North American Naturalist 60 (1) 57-65. PDF
They looked at adult stonefies and caddisfies upstream and downstream of inputs from trans mountain diversions, heavy metal pollution and dams on the Arkansas River in 1983 and 1984. They found that adult P. delicatula were present at the most upstream and highest elevation sites sampled. they were pesent below the Leadville Drain but disappeared downstream of California Gulch. After freshwater was added to the Arkansas River from the western slope, they reappeared at one site. They were probably absent downstream due to warmer water temperatures. Quote from page 63: "The negative effect of heavy metal inputs from Leadville Drain and California Gulch on stonefly or caddisfly species richness was less than that of Pueblo Reservoir."
Stewart,KW and Stark,BP 2011 Further descriptions of western North American Podmosta larvae and their separation from Ostrocerca larvae (Plecoptera: Nemouridae). Illiesia 7(10):104-117. PDF
Abstract: "Associated larvae of the four western North American species of Podmosta are comparatively described and illustrated. Three species, Podmosta delicatula (Claassen), P. obscura (Frison) and P. weberi (Ricker), are described in detail for the first time. A preliminary larval key to the five North American species is presented, based mainly on differences in pigment pattern and cercal setation. Separation of the larvae of non-gilled nemourid genera Ostrocerca and Podmosta, though difficult, is further clarified by comparative scanning electron micrographs of the four western Nearctic Podmosta species and larvae of Ostrocerca dimicki (Frison)"
Brown,WS 2004 Plecoptera or Stoneflies of Gunnison County, Colorado