Eudactylocladius
Creators: name: Ole
name: Saether, A.
Publisher: name: Zenodo
Year: 2004
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Chironomidae
Eudactylocladius

description: 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 distinct, particularly the superior; Holarctic .............................. ........................................................................................................... O. (E.) gelidorum (Kieffer)
­ Gonocoxite without differentiated volsellae, just a gently rounded contour; Holarctic ............... ............................................................................................................... O. (E.) olivaceus Kieffer
description: Published as part of Ole & Saether, A., 2004, Three new species of Orthocladius subgenus Eudactylocladius (Diptera: Chironomidae) from Norway, pp. 1-12 in Zootaxa 508 on pages 11-12, DOI: 10.5281/zenodo.157963