Pseudorthocladius immezensis sp. n., a new relict species inhabiting the Macun high-alpine stream, Swiss Alps (Diptera: Chironomidae)
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 a...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
NTNU University Museum Norwegian University of Science and Technology
2021-08-01
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| Series: | CHIRONOMUS Journal of Chironomidae Research |
| Subjects: | |
| Online Access: | https://www.ntnu.no/ojs/index.php/chironomus/article/view/3985 |
| Summary: | 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. |
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| ISSN: | 0172-1941 2387-5372 |