Eumerus brevipilosus 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: 115-117

publication ID

https://doi.org/10.5852/ejt.2020.722.1139

publication LSID

lsid:zoobank.org:pub:90B3B475-49D9-4869-8F5F-A788DB880356

persistent identifier

http://treatment.plazi.org/id/D239E0A4-F597-444E-8034-B5B1C67A55A0

taxon LSID

lsid:zoobank.org:act:D239E0A4-F597-444E-8034-B5B1C67A55A0

treatment provided by

Valdenar

scientific name

Eumerus brevipilosus Gilasian & van Steenis
status

sp. nov.

Eumerus brevipilosus Gilasian & van Steenis   sp. nov.

urn:lsid:zoobank.org:act:D239E0A4-F597-444E-8034-B5B1C67A55A0

Figs 3B View Fig , 5A View Fig , 6B View Fig , 8A View Fig , 9 View Fig B–C, 11B–C, 12B, 13C–D, 14A–B, 18B, 20B, 22B

Diagnosis

This species is closely related to E. aurofinis   except for the following characters: body length about 8 mm, not densely punctuated (with coarse and dense punctuation in E. aurofinis   ); wing hyaline (infuscated in E. aurofinis   in the area posterior to intersection of veins R2+3 and R4+5); metafemur slightly enlarged (strongly enlarged in E. aurofinis   ); aedeagal apodeme long, narrow and abruptly bent apically (short, wide and without bend in E. aurofinis   ) (see Grković et al. 2015: 367, fig. 4C); posterior lobe of surstylus in lateral view wider than in E. aurofinis   (see Grković et al. 2015: 367, fig. 4A).

Etymology

The specific epithet ‘ brevipilosus   ’ [Latin] is derived from ‘brevis’ (short) and ‘pilosus’ (pilose), in reference to the very sparse and short pile on the head, thorax and abdomen rarely seen in the genus Eumerus   .

Material examined

Holotype

IRAN • ♂; “ IRAN: Fars prov., Meimand / Firouzabad, Kuhe - Sefidan / 28°56′0.34″N, 052°48′58.0″E / 2080m., 9.iv.2006 / E. Gilasian // HOLOTYPUS ♂ / Eumerus brevipilosus   / Gilasian & van Steenis / 2020 [red label]”; HMIM.

GoogleMaps  

Paratypes

IRAN • 4 ♀♀; same collection data as for holotype; HMIM GoogleMaps   .

Description

Male ( Figs 3B View Fig , 6B View Fig )

MEASUREMENTS. Body length: 7.8 mm; wing length: 5.5 mm.

HEAD ( Fig. 13 View Fig C–D). Eyes short and white pilose, dichoptic, 2–3 ommatidia spaced; face nearly parallelsided, weakly grey pollinose, with whitish pile; frontal triangle weakly grey pollinose, entirely covered with dense and long white pile; head in frontal view 3.2 times as wide as face; frontal triangle almost 1.3 times as long as vertical triangle; vertical triangle almost entirely shiny black, with yellowish pile; ocellar triangle nearly equilateral; ocellar triangle bulging and shiny black, with black pile, about as long as vertical triangle; distance between posterior ocelli to posterior margin of eye nearly 0.8 times as long as ocellar triangle; occiput light grey pollinose, with light pile; frontal triangle nearly 1.6 times as wide as ocellar triangle; vertex at posterior corner of eyes 1.15 times as wide as vertex over posterior ocelli; head in dorsal view 4.5 times as wide as vertex at posterior corner of eyes; scape brown; pedicel yellowish brown; basoflagellomere orange, 1.2 times as long as wide; arista brown, 1.3 times as long as basoflagellomere ( Fig. 11B View Fig ).

THORAX. Scutum and scutellum shiny black with very short yellowish pile; scutum with two narrow median pollinose vittae reaching to median suture; anterior part of median vittae semi-triangular; posterolateral part of scutum with a longitudinal row of black setulae above base of wing; scutellum with marginal rim; pleurae shiny black; anepisternum, katepisternum and anepimeron covered with short yellowish pile.

LEGS ( Fig. 9B View Fig ). Legs shiny black, with yellowish short pile; procoxa orange apically; femora predominantly black except for orange apical tip and basal narrow orange margin, basal half and apex of tibiae orange; tarsi mostly orange except for brownish-black dorsally; metafemur simple, slightly enlarged, about 3 times as long as wide, with very short yellowish pile ventrally; anteroventral and posteroventral margins of metafemur each with a row of 8 respectively 5 black setae in about apical half.

WING. Entirely microtrichose; vein R 4+5 nearly straight; calypters whitish; halter yellowish-orange.

ABDOMEN. Black, covered with very short yellowish pile except for long whitish pile on tergum II anterolaterally; terga II–IV each with a pair of lunulate-shaped oblique maculae of white pollinosity; sterna brown, with yellowish short pile; sternum IV rectangular, with rounded posterolateral corners and with median wide V-shaped incision posteriorly ( Fig. 12B View Fig ).

GENITALIA ( Figs 18B View Fig , 20B View Fig , 22B View Fig ). Hypandrium simple; aedeagal apodeme in lateral view narrow and abruptly bent apically; cercus semi-rectangular; posterior lobe of surstylus in lateral view thumb-shaped apically and in dorsal view uniformly rounded apically and entirely covered with short setulae dorsally; inner accessory lobe of surstylus with short pile.

Female ( Figs 5A View Fig , 8A View Fig , 9C View Fig , 11C View Fig , 14 View Fig A–B)

Body length: 7.8–8.2 mm; wing length: 6.0– 6.5 mm. Same as male except for sexual dimorphism and for the following characters: frons shiny black, weakly pollinose laterally and with short yellowish pile; vertex at posterior corner of eyes as wide as vertex over posterior ocelli; head in dorsal view 4 times as wide as vertex at posterior corner of eyes; scutum with median narrow pollinose vittae reaching to ⅓ behind median suture; anepisternum, katepisternum and anepimeron covered with very short yellowish pile.

Distribution

Iran.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Syrphidae

Genus

Eumerus