Achalcus, LOEW, 1857

Pollet, Marc, 2005, Systematic revision of Neotropical Achalcus and a related new genus (Diptera: Dolichopodidae, Achalcinae) with comments on their phylogeny, ecology and zoogeography, Zoological Journal of the Linnean Society 143 (1), pp. 27-73 : 31-32

publication ID	https://doi.org/10.1111/j.1096-3642.2004.00141.x
DOI	https://doi.org/10.5281/zenodo.10545198
persistent identifier	https://treatment.plazi.org/id/14691203-0320-0923-FEF1-B291CCF1C8C9
treatment provided by	Diego (2021-08-31 17:05:28, last updated 2024-01-21 10:55:27)
scientific name	Achalcus
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ACHALCUS LOEW, 1857 View in CoL View at ENA

Achalcus Loew, 1857: 30 View in CoL

Type species: Porphyrops flavicollis Meigen, 1824: 56 Achalcus flavicollis (Meigen, 1824) as designated by Robinson (1970: 22)

Head. Uppermost postoculars usually darker than lower ones (exc. A. costaricensis , A. tibialis ). Arista usually longer than first three antennal joints.

Thorax and abdomen. Five dc (synapomorphy). No small additional setae between posthumeral, presutural and first two dc bristles. Abdomen with five pubescent segments (synapomorphy). Hypopygium ( Figs 1 View Figure 1 , 2 View Figure 2 ). Hypandrium simple, without spines on apex; aedeagus simple, at most with subapical dorsal bend; ventral (not dorsal, as in Pollet & Cumming, 1998) epandrial lobe slender with three epandrial setae on shaft (synapomorphy); midventral bristle of surstylus usually without or with only minute apical flag. Legs. Tibia I with one, two or without dorsal bristles. Tibia II with two ad bristles (exc. niger ). Femur III mostly with strong preapical ad bristle, usually inserted at middle of anterior face.

References

Loew H. 1857. Neue Beitrage zur Kenntniss der Dipteren. Funfter Beitrag. Programme der Koniglichen Realschule zu Meseritz 1857: 1 - 56.

Pollet M, Cumming JM. 1998. Systematic revision of Nearctic species of Achalcus Loew (Diptera: Dolichopodidae) with comments on their phylogeny, ecology and zoogeography. Systematic Entomology 23: 371 - 385.

Robinson H. 1970. Family Dolichopodidae. In: A catalogue of the Diptera of the Americas South of the United States Fasc. 40. Universidade de Sao Paulo, Museu de Zoologia, 1 - 92.