Eumerus vallicolus Gilasian & van Steenis, 2020

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 : 145-146

publication ID

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

publication LSID

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

persistent identifier

https://treatment.plazi.org/id/DB618219-7086-4DFA-82AC-F261D536B68D

taxon LSID

lsid:zoobank.org:act:DB618219-7086-4DFA-82AC-F261D536B68D

treatment provided by

Valdenar

scientific name

Eumerus vallicolus Gilasian & van Steenis
status

sp. nov.

Eumerus vallicolus Gilasian & van Steenis View in CoL sp. nov.

urn:lsid:zoobank.org:act:DB618219-7086-4DFA-82AC-F261D536B68D

Figs 4H View Fig , 7H View Fig , 10D View Fig , 11I View Fig , 12F View Fig , 17 View Fig G–H, 19D, 21D, 23D

Diagnosis

This species differs from the species E. tricolor , E. pamirorum , E. sarybulunis and E. coeruleithorax by the following characters: eyes distinctly dichoptic, 5–6 ommatidia spaced, distance between eyes wider than in E. tricolor but narrower than in E. pamirorum and E. coeruleithorax , eyes in E. sarybulunis coalescent over some distance; frontal triangle with dense whitish pile like in E. sarybulunis (it is not covered with so dense pile in E. tricolor , frontal triangle in E. coeruleithorax with sparse black pile and in E. pamirorum with sparse white pile); ocellar triangle narrow like in E. tricolor (it is wider in other species); ocellar triangle black pilose like in the European E. tricolor (with white pile in Turkish E. tricolor and other species); thorax with relatively long pile like in E. coeruleithorax (with very short pile in E. tricolor and covered with longer pile in E. sarybulunis and E. pamirorum ); metafemur narrow like in E. tricolor (in other species it is either longer pilose and/or incrassate); abdominal maculae on terga III and IV more oblique than in other species.

Etymology

The name ‘vallicolus’ [Latin] is derived from ‘vallis’ (valley) and ‘incola’ (dweller), in reference to Chekab Valley, where the holotype was collected.

Material examined

Holotype

IRAN • ♂; “ IRAN: Markazi prov., Haftad / Qolleh Protected Area, / Chekab Valley , 2219 m, / 34°07′0.5″N, 050°16′25.3″E, / 28.v–15.vi.2016, Malaise trap / near pool, E. Gilasian & M. / Parchami- Araghi // HOLOTYPUS ♂ / Eumerus vallicolus / Gilasian & van Steenis / 2020 [red label]”; HMIM.

GoogleMaps

Description

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

MEASUREMENTS. Body length: 6 mm; wing length: 4.5 mm.

HEAD ( Fig. 17 View Fig G–H). Eyes short yellowish pilose, dichoptic, 5–6 ommatidia spaced; face nearly parallelsided, shiny black and covered with short yellowish-white pile; frontal triangle black, weakly pollinose and covered with dense whitish pile; head in frontal view 4.3 times as wide as face; frontal triangle 1.6 times as long as vertical triangle; vertical triangle shiny black, with brownish pile; ocellar triangle isosceles; ocellar triangle shiny black, with blackish pile, 1.1 times as long as wide and 1.4 times as long as vertical triangle; distance between posterior ocelli to posterior margin of eye about 0.6 times as long as ocellar triangle; occiput light grey pollinose, with yellowish pile; frontal triangle 1.25 times as wide as ocellar triangle; vertex at posterior corner of eyes 1.2 times as wide as vertex over posterior ocelli; head in dorsal view 5.3 times as wide as vertex at posterior corner of eyes; antennae brownish-black; basoflagellomere almost 0.9 times as long as wide; arista about 2 times as long as basoflagellomere ( Fig. 11I View Fig ).

THORAX. Scutum and scutellum shiny black, with relatively long white pile, without median pollinose vittae; posterolateral part of scutum with a longitudinal row of black seulae above base of wing; scutellum with marginal rim; pleurae shiny black; anepisternum, anepiemron and katepisternum with short whitish pile.

LEGS ( Fig. 10D View Fig ). Predominantly black, short yellowish-brown pilose; apex of femora and basal narrow margin of tibiae orange; metafemur simple, narrow, about 4 times as long as wide; anteroventral and posteroventral margins of metafemur each with a row of 11 respectively 6 black setae in about apical half; metatarsus with tuft of dense orange pile ventrally.

WING. Hyaline, entirely microtrichose; vein R 4+5 slightly sinuate; calypters yellowish; halter yellowishorange.

ABDOMEN. Tergum I black with short blackish pile; tergum II mostly orange except for anterior black margin and median black vitta not reaching posterior margin of segment; tergum II yellowish pile except for short blackish pilosity on its posterior third; tergum III entirely orange, mostly short blackish pile except for whitish pile on its white maculae; tergum IV black, with mostly short whitish pile except for short black pile on its anterior and posterior margin; sterna short yellowish pilose; sternum I black in anterior half and orange in posterior half; sterna II and III orange; sternum IV black, rectangular, with rounded posterolateral corners and with median wide V-shaped incision posteriorly ( Fig. 12F View Fig ).

GENITALIA ( Figs 19D View Fig , 21D, 23D View Fig ). Hypandrium simple; aedeagal apodeme relatively narrow in lateral view; posterior lobe of surstylus in lateral view sharply extending outward posteroventrally, with a longitudinal row of short and black setulae posteriorly, with a few short median setulae and with 2–3 setae anteriorly, posterior lobe of surstylus in dorsal view uniformly rounded apically, almost balloonshaped, covered with short setulae; inner accessory lobe of surstylus with short pile.

Female

Unknown.

Distribution

Iran.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Syrphidae

Genus

Eumerus

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