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Stoneflies - Plecoptera: Nemouridae of Gunnison County, Colorado

Malenka californica - California Forestfly

Claassen 1923
Updated 18 Nov 2018
TSN 102573


The genus Malenka was previously named Nemoura. Older publications may refer to this species as Nemoura californica.

Good Links

On this website:
Malenka Introduction

Other Websites:
Species details from plecoptera.species.file


Baumann,RW, Gaufin,AR and Surdick,RF 1977 The stoneflies (Plecoptera) of the Rocky Mountains. Memoirs of the American Entomological Society 31, 1-208.
     Quote from page 30: "The nymphs are common in small creeks in the fall, but rare in the spring. Emergence usually occurs in the fallbut spring-dwelling populations begin emerging in March and continue until December. "

Bogan,MT and Carlson,SM 2018 Diversity and phenology of stoneflies (Plecoptera) from intermittent and perennial streams in Pinnacles National Park, California, U.S.A. Illiesia, 14(08):144-154. https://doi.org/10.25031/2018/14.08 PDF
     The authors found M. californica in perennial streams only.

Claassen,PW 1923 New species of North American Plecoptera. Canadian Entomologist 55, 257-263,281-292.

Kondratieff,BC; 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: "Malenka californica emerges in late summer and early fall, and occurs in small to medium sized streams in the Transition zone along the Front Range and other mountainous areas of the state. "

Richardson, JS 2001 Life cycle phenology of common detritivores from a temperate rainforest stream. Hydrobiologia 455 (1) 87-95. DOI - 10.1023/A:1011943532162
     Abstract: The timing of life cycles, including growth rates, was determined for eight common species of detritivorous insects in a second-order stream in southwestern British Columbia, Canada. Six of the species (
Zapada cinctipes, Z. haysi, Malenka californica, M. cornuta, Capnia sp., and Lepidostoma roafi) had simple, univoltine life cycles. The leuctrid stonefly Despaxia augusta has a 2-year life cycle, with an apparent egg diapause of about 6 months. The chironomid Brillia retifinis produced at least three generations per year. The major growth periods for the set of species considered here span the entire year. Adults of several species exhibited seasonal declines in size at emergence, but one species had larger adults as the emergence period proceeded. Closely related taxa had more similar life cycle timing than more distantly related species suggesting a degree of phylogenetic constraint in phenology of their life cycles. The influence of the timing of leaf drop on timing of life cycles for these animals does not fit with proposed scenarios based on fast and slow leaf processing rates.

Brown, Wendy S. 2004 Plecoptera or Stoneflies of Gunnison County, Colorado