Eumerus pilosipedes Gilasian & van Steenis

Gilasian, Ebrahim, Steenis, Jeroen van & Parchami-Araghi, Mehrdad, 2020, Review of the Eumerus tricolor species group (Diptera: Syrphidae) in Iran, with description of six new species, European Journal of Taxonomy 722, pp. 106-152: 136-139

publication ID

publication LSID

persistent identifier

taxon LSID

treatment provided by


scientific name

Eumerus pilosipedes Gilasian & van Steenis

sp. nov.

Eumerus pilosipedes Gilasian & van Steenis   sp. nov.

Figs 4E View Fig , 7E View Fig , 10 View Fig B–C, 11H, 12E, 17A–B, 19C, 21C, 23C


This species is closely related to E. kazanovzkyae   except for the following characters: eyes more widely separated, nearly 3–4 ommatidia spaced (separated in E. kazanovzkyae   by about 1 ommatidium); frontal triangle about 2.0–2.3 (1.75 in E. kazanovzkyae   ) times as long as vertical triangle; scutum and pleurae with longer pile; metafemur with longer ventral pile, about ¼–⅓ (1/8–1/ 7 in E. kazanovzkyae   ) width of metafemur; dense thick pile fringe on apicodorsal part of metatibia almost absent (long pile fringe about 3/5 width of metatibia present); metatarsus with pile fringe on entire dorsal surface (with narrower pile fringe in E. kazanovzkyae   that is confined to antero-dorsal margin of metatarsus); wing slightly infuscated in apical half from anterior margin to anterior half of cell dm (strongly infuscated in E. kazanovzkyae   reaching to posterior margin of wing); posterior lobe of surstylus in dorsal view uniformly rounded apically and entirely covered with setulae (truncated on inner side in E. kazanovzkyae   with scattered setulae).


The specific epithet ‘ pilosipedes   ’ is derived from ‘pile’ (pile) and ‘pedes’ (foot), in reference to the thick pilose metatarsus.

Material examined


IRAN • ♂; “ IRAN: Markazi prov., Haftad / Qolleh Protected Area, / Chekab Valley , 2219 m, / 34°07′0.5″N, 050°16′25.3″E, / 25.v–, Malaise trap / near pool, E. Gilasian & M. / Parchami- Araghi // HOLOTYPUS ♂ / Eumerus pilosipedes   / Gilasian & van Steenis / 2020 [red label]”; HMIM.



IRAN • 6 ♂♂; same collection data as for holotype; HMIM GoogleMaps   .


Male ( Figs 4E View Fig , 7E View Fig )

MEASUREMENTS. Body length: 6.8–9.7 mm; wing length: 5–6.9 mm.

HEAD ( Fig. 17 View Fig A–B). Eyes pilose, dichoptic, nearly 3–4 ommatidia spaced; face nearly parallel-sided, grey pollinose and covered with dense and long yellowish-white pile; frontal triangle grey pollinose, entirely covered with dense golden pile; head in frontal view about 3.30–3.35 times as wide as face; frontal triangle about 2.0–2.3 times as long as vertical triangle; vertical triangle whitish grey pollinose, with yellowish pile; ocellar triangle isosceles; ocellar triangle shiny black, with yellowish pile, 1.10– 1.15 times as long as wide and 1.4 times as long as vertical triangle; distance between posterior ocelli to posterior margin of eye nearly as long as ocellar triangle; occiput light grey pollinose, with light pile; frontal triangle nearly 2 times as wide as ocellar triangle; vertex at posterior corner of eyes 1.4 times as wide as vertex over posterior ocelli; head in dorsal view 4.5 times as wide as vertex at posterior corner of eyes; antennae yellowish-orange, arista mostly dark brown except for yellowish basal aristomeres; basoflagellomere more or less rounded apically, 1.0–1.2 times as long as wide; arista 1.7–2 times as long as basoflagellomere ( Fig. 11H View Fig ).

THORAX. Scutum and scutellum shiny black with long yellowish pile; scutum with two narrow median pollinose vittae reaching to ⅓–½ behind median suture and with two lateral weak pollinose vittae viewed dorsally; anterior part of median vittae semi-triangular; posterolateral part of scutum with a longitudinal row of setulae above base of wing; scutellum with marginal rim; pleurae black, weakly pollinose and covered with long yellowish pile except for bare anterior parts of anepisternum and katepisternum, meron and posterior part of anepimeron; metasternum pilose.

LEGS ( Fig. 10 View Fig B–C). Predominantly shiny black; apical tip of femora orange, pro- and mesofemora sometimes orange in apical ⅓–½, metafemur rarely orange in apical ¼–⅓; basal half of pro- and mesotibia and basal third of metatibia orange; pro- and mesotarsus orange, connecting parts of tarsomeres black; metatarsus brownish-black; proleg with yellowish pile; mesoleg predominantly with yellowish pile except for black pilosity anteriorly; mesotibia and tarsomeres of mesotarsus with apical black setulae anteriorly; metacoxa with dense yellowish pile; metafemur simple, slightly enlarged, about 4 times as long as wide, with long yellowish pile ventrally, ventral pile 1/5–¼ of width of metafemur; anteroventral and posteroventral margins of metafemur each with a row of 10 respectively 6 black setae in about apical half; metatibia black pilose except for a little yellowish basal short pile dorsally; apicodorsal pile of metatibia about ⅓ of width of metatibia; metatarsus with long black pile fringe which occupies entire dorsal surface of tarsomeres, other parts of metatarsus with brown pile.

WING. Wing entirely microtrichose, slightly infuscated in apical half from anterior margin to anterior half of cell dm, calypters yellowish; halter yellowish-orange.

ABDOMEN. Tergum I black with whitish pile laterally; terga II–IV each with a pair of lunulate-shaped oblique maculae of white pollinosity; tergum II orange with a median black ‛pewter chalice’-shaped vitta; tergum II mostly white pilose except for black pilosity on about posterior third, anterolateral piles on tergum II dense and long; terga III–IV entirely orange with mostly black pile except for white pile on their oblique maculae; sterna yellowish short pilose; basal half of sternum I black; apical half of sternum I and sterna II–IV orange; sternum IV rectangular, with rounded posterolateral corners and with median wide incision posteriorly ( Fig. 12E View Fig ).

GENITALIA ( Figs 19C View Fig , 21C, 23C View Fig ). Hypandrium simple; aedeagal apodeme as in Fig. 23C View Fig in lateral view; cercus semi-rectangular; posterior lobe of surstylus narrowed toward apex in lateral view and uniformly rounded apically in dorsal view, entirely covered with setulae dorsally; inner accessory lobe of surstylus with short pile.