The male adult of Chaetocladius rottensis sp. n. is described based on material collected between 1998 and 2018 in glacial alpine springs and streams delimited by the upper basin of the Rhône River (Mutt stream, Swiss Alps, alt. 1800-2100 m). The nearest known alpine species are: C. aedeagolobatus Rossaro, Magoga & Montagna, 2017 and C. lodscrozetae Moubayed-Breil, 2018. Despite the high resemblance between these three species, C. rottensis sp. n. can be separated on a combination of characters as detailed in Table I. In particular, C. rottensis sp. n. and C. lodscrozetae are considered to be sister species based on close morphological similarity. They both belong to relict alpine elements and are considered here as local biogeographic indicators. Currently, there are 16 recorded Chaetocladius species from Switzerland including 13 recently reported by Moubayed-Breil & Lods-Crozet (2018) and 3 additional new records: C. aedeagolobatus Rossaro, Magoga & Montagna, 2017; C. dentiforceps (Edwards, 1929), C. subalpinus Rossaro, Magoga & Montagna, 2017. Consequently, the description of C. rottensis sp. n. increases the total number in the genus to 17 for this country. Remarks, morphological affinities and comments on the ecology of the new species are highlighted.
Ephemera 25 : 13-23 (11 pages)
Chaetocladius rottensis sp. n., a glacial alpine species from the upper basin of the Rhône River, Switzerland (Diptera, Chironomidae, Orthocladiinae)
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Reçu le 27 novembre 2023 -
Accepté le 10 janvier 2024 -
Publié le 25 novembre 2024
Taxonomy
new species
Swiss Alps
conservation measures
Espèces décrites :
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Chaetocladius rottensis
Lods-Crozet & Moubayed, 2024
LSIDurn:lsid:zoobank.org:act:B9EFAE20-B482-4EBA-89D3-AFC392573371
French translation
Chaetocladius rottensis sp. n., une espèce alpine glaciaire connue du haut bassin du Rhône suisse (Diptera, Chironomidae, Orthocladiinae)
taxonomie
nouvelle espèce
Alpes Suisses
mesures de conservation
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