Eudactylocladius

• Main Authors: Ole, Saether, A.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2004
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Diptera; Chironomidae; Eudactylocladius; Svalbard
• Online Access: https://zenodo.org/record/6270728; https://doi.org/10.5281/zenodo.6270728

Key to male imagines of the subgenus Eudactylocladius (Modified from Cranston, 1999) 1. Superior volsella well developed, rounded to right­angled. 2 ­ Superior volsella scarcely to moderately developed. 3 2 Inferior volsella well developed, bluntly triangular; dorsal part of cibarial pump wider than long; no sensilla chaetica on mid leg; Palaearctic . O. (E.) musester sp. n. ­ Inferior volsella weakly indicated to non­existent; dorsal part of cibarial pump not as wide as long; sensilla chaeticae present on mid leg; Palaearctic. O. (E.) fuscimanus (Kieffer) 3. Inner margin of gonocoxite with strong dense setae, commencing some distance posterior of gonocoxite base, associated with weakly delimited superior volsella. 4 ­ Inner margin of gonocoxite with finer, less dense, setae, commencing closer to gonocoxite base, anterior to sometimes moderately indicated superior volsella. 5 4. Gonostylus without inner projection, squama with 9–14 setae; Nearctic. O. (E.) subletteorum Cranston ­ Gonostylus with inner, preapical, triangular projection; squama with 13–20 setae; Palaearctic. . O. (E.) priomixtus sp. n. 5. Superior volsella moderately developed, angular; anal point strong, but not strongly sclerotised, greater than 50 m long; ultimate flagellomere at least 500 m long; Holarctic. . O. (E.) gelidus Kieffer ­ Superior volsella scarcely developed; anal point weak to moderately developed or strong and sclerotised, usually less than 50 m long; ultimate flagellomere often less than 500 m long. 6 6. Anal point strong, well sclerotised; sensilla chaeticae of legs absent; Svalbard. . O. (E.) schnelli sp. n. ­ Anal point sometimes very weak to absent, never strongly sclerotised; sensilla chaeticae probably always present on mid and hind legs. 7 7. Gonostylus with microtrichiae on dorsal surface strong and dense, anal point sometimes very weak to absent; Nearctic . O. (E.) dubitatus Johannsen ­ Gonostylus with microtrichiae on dorsal surface fine and sparse, anal point well developed. 8 8. Gonocoxite with both volsellae ...