Demicryptochironomus
Lenz, 1941
Demicryptochironomus is a of non-biting midges in the Chironominae, Chironomidae. The genus was established by Lenz in 1941, with D. vulneratus as the type . Phylogenetic analysis based on mitogenomes shows Cryptochironomus as sister to Demicryptochironomus within the Harnischia generic complex. The genus includes seven described species distributed across Europe and Asia.
Pronunciation
How to pronounce Demicryptochironomus: //ˌdɛmiˌkrɪptoʊˌkaɪˈrɒnəməs//
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Identification
Larvae distinguished from related by antennal flagellomere structure, shape of lateral teeth, and form. Pupae possess unique thoracic horns and pedes spurii B that separate them from Cryptochironomus and Harnischia. females share characteristics with Cryptochironomus, making separation difficult without detailed examination.
Habitat
stages occupy bottoms of lakes and large rivers; minority of occur in small streams.
Distribution
Europe (Denmark, Norway, Sweden) and Asia (China).
Life Cycle
Holometabolous development with , larva, pupa, and stages. stages are aquatic.
Behavior
Some have been observed to tolerate organic pollution.
Ecological Role
Serves as a bioindicator of eutrophication in freshwater ; used in environmental monitoring programs.
Human Relevance
Used as for assessing water quality and eutrophication levels in freshwater systems.
Similar Taxa
- CryptochironomusSister with which it shares close phylogenetic relationship; females share morphological characteristics requiring careful examination to distinguish.
- HarnischiaMember of the same generic complex; pupal thoracic horn and pedes spurii B differ.
More Details
Phylogenetic position
Within the Harnischia generic complex, Demicryptochironomus forms a clade with Cryptochironomus as its sister group, while Harnischia is monophyletic.
Species diversity
Seven are currently recognized: D. cuneatus, D. fastigatus, D. latior, D. neglectus, D. vulneratus, D. wontongensis, and D. paracamptolabis.