Coenosia cingulipes

Coenosia cingulipes (Zetterstedt, 1849)

Figs 2 A, B

Anthomyza cingulipes Zetterstedt 1849: 3320. Type-locality: “Hab. in Lapponia Lulensi forte raro, mihi in unico exemplo a D. Doct. Andersson 1844 communicata” [SWEDEN, Lule Lappmark]. Type-location: Holotype ♀, MZLU, type no. 3700 [Stein, 1897: 94; Ringdahl, 1945: 17; Pont, 2011: 19–20].

Hoplogaster morrisoni Malloch 1924: 172, syn. nov. Type-locality: “White Mountains, New Hampshire (Morrison)” [USA, New Hampshire]. Type-location: Holotype ♂, USNM.

Coenosia morrisoni; Sorokina & Tridrikh 2021: 230 (Chukotka:Anadyr’, Bilibino, Pevek); Sorokina 2022: 57 (Magadan region, Taymyr Peninsula, Amur region).

Comments. Anthomyza cingulipes Zetterstedt, 1849 was synonymised with Anthomyza (now Coenosia) bilineella Zetterstedt, 1838 by Pont (2011: 19). In this paper, Pont noted that in the addition to the holotype in MZLU there is a male from Abisko in subarctic Sweden identified by Ringdahl (1956: 167) as cingulipes that does not even run to Coenosia cingulipes in Ringdahl’s (1956) key.

Recently Adrian Pont visited MZLU and made a new study of both the female holotype of Anthomyza cingulipes and Ringdahl’s Abisko male of “ cingulipes ”. The information about these specimens has been provided by Adrian Pont for publication.

The holotype of Anthomyza cingulipes keys out to Coenosia bilineella in Ringdahl (1956) and Hennig (1961b) but differs immediately by having mid femur with an anterodorsal preapical seta. Antennae, left hind leg, and four tarsomeres on right hind leg and right mid leg missing. It is not fully hardened and the fore legs are very twisted; fore femur is dark above and yellow below; mid and hind femora yellow with dorsal darkening in apical quarter; tibiae yellow, tarsi black; 2 proepisternal setae; frontal triangle not quite reaching to level of upper orbital setae; antennal postpedicel rounded at anterior tip (examination of 2003, since the antennae have subsequently been lost); without setulae at the neck or on the postpronotal lobes developed as spinules; each tergite with a faint pair of spots; hind femur with 2 pv in basal half and 1 pv just beyond middle; mid femur with 1 p preapical, and no trace (scar) of a second; hind tibia with d and ad apical setae at the same level; without pd but with a few longer setulae around middle.

This description of Anthomyza cingulipes and the excellent images of the holotype (Fig. 2 A, B) agree with the description of Hoplogaster morrisoni Malloch, 1924. The validity of Hoplogaster morrisoni was discussed in a recent paper by Sorokina (2022); this species is not synonym of Coenosia octopunctata (Zetterstedt, 1838). Following the examination of the holotype of Anthomyza cingulipes by Adrian Pont and the excellent images of the holotype, I conclude that Hoplogaster morrisoni Malloch, 1924 is a new junior synonym of Anthomyza cingulipes Zetterstedt, 1849.

The male from Abisko (9.vii.1922, col. Ringdahl) named by Ringdahl as “ cingulipes ” has: palpus and antenna black, the tip of antennal pedicel slightly pale; 2 proepisternal setae; 1 proepimeral seta, with no ancillary setulae (i.e. no downcurved setula); all femora yellow, except for a dark dot at tip of mid and hind femora; all tibiae yellow; fore tarsus with tarsomere 1 and part of tarsomere 2 yellow, the rest brown; mid tarsus brown except for part of tarsomere 1; hind tarsus wholly brown; mid femur without av and with 1 pv in basal half; with 0 a and 2 p preapical setae; mid tibia with the ad almost twice as long as the pd; hind femur without pv in apical half; lower calypter large and well-developed. With these characters, and bearing in mind the variability of lower calypter, this male runs straight to Coenosia conflicta (Huckett, 1965), a species which is otherwise known from Abisko (A.C. Pont, pers. comm.).

Distribution. Palaearctic: China (Jilin), Russia (Amur region, Chukotka AO, Magadan region, Taymyr Peninsula), Sweden (Lule Lappmark). Nearctic: Canada (North-West Territories, Yukon Territory). USA (New Hampshire).