Pseudorthocladius immezensis sp. n., a new relict species inhabiting the Macun high-alpine stream, Swiss Alps (Diptera: Chironomidae)
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Published:
Aug 24, 2021
Keywords:
new species, rheocrenes, eastern Swiss Alps, conservation, Pseudorthocladius
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Abstract
Male adult of Pseudorthocladius immezensis sp. n
is diagnosed and described based on material collected in the high alpine cirque of the Macun area (Immez Lake basin, alt. 2616 m a.s.l.).
A combination of morphological characters found in the male adult has allowed us to consider this new species as a local biogeographical representative of the eastern part of the Swiss Alps: coronal suture with lateral extension, low antennal ratio (AR 0.30); distal half of wing hairy; anal point broadly triangular with a characteristic enlarged base; inner apical margin of gonocoxite truncate; superior volsella large lobe-like; inferior volsella double, dorsal lobe nose-like and distinctly bent apically; virga present, with 4 spines; crista dorsalis absent. A differential diagnosis is given, in which some distinguishing morphological characters are summarised. Comments on the ecology and geographical distribution of the new species are also provided.
is diagnosed and described based on material collected in the high alpine cirque of the Macun area (Immez Lake basin, alt. 2616 m a.s.l.).
A combination of morphological characters found in the male adult has allowed us to consider this new species as a local biogeographical representative of the eastern part of the Swiss Alps: coronal suture with lateral extension, low antennal ratio (AR 0.30); distal half of wing hairy; anal point broadly triangular with a characteristic enlarged base; inner apical margin of gonocoxite truncate; superior volsella large lobe-like; inferior volsella double, dorsal lobe nose-like and distinctly bent apically; virga present, with 4 spines; crista dorsalis absent. A differential diagnosis is given, in which some distinguishing morphological characters are summarised. Comments on the ecology and geographical distribution of the new species are also provided.
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How to Cite
Lods-Crozet, B., & Moubayed-Breil, J. (2021). Pseudorthocladius immezensis sp. n., a new relict species inhabiting the Macun high-alpine stream, Swiss Alps (Diptera: Chironomidae). CHIRONOMUS Journal of Chironomidae Research, (34). https://doi.org/10.5324/cjcr.v0i34.3985
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Current Research
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