Nemoura trispinosa
Claassen, 1923
Nemoura trispinosa is a described by Claassen in 1923, currently treated as a synonym of Nemoura arctica. It belongs to the , a group of small, generally cold-adapted stoneflies. The species was described from North material and has been recorded across and regions of the Northern Hemisphere. As a synonym, its biological characteristics are subsumed under the senior name Nemoura arctica.
Pronunciation
How to pronounce Nemoura trispinosa: /nɛˈmaʊrə trɪˈspɪnəsə/
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Identification
As a synonym of Nemoura arctica, specimens historically identified as N. trispinosa would be indistinguishable from N. arctica based on current . The original description distinguished N. trispinosa by three on the male , a character now considered to fall within the morphological variation of N. arctica.
Habitat
Records indicate association with cold, running water typical of the . Specimens have been collected from and subarctic stream systems.
Distribution
Documented from Siberia, the Baltic States, Alaska, Alberta, and British Columbia. The distribution spans the Holarctic region, consistent with the widespread - range of the senior synonym Nemoura arctica.
Ecological Role
As a nemourid , would function as a - in headwater stream , processing allochthonous material. This role is inferred from -level and has not been specifically documented for this nominal .
Similar Taxa
- Nemoura arcticaSenior synonym; N. trispinosa was synonymized based on overlapping morphological variation in male genitalic characters, particularly the structure of the .
More Details
Taxonomic status
Nemoura trispinosa is widely treated as a junior synonym of Nemoura arctica (Pictet, 1865). The synonymy reflects revised understanding of intraspecific morphological variation rather than misidentification of distinct .