Orsodacne mesopotamicus Legalov, 2022

Legalov, Andrei A., 2022, A new species of the genus Orsodacne Latreille, 1802 (Coleoptera: Orsodacnidae) from Iraqi Kurdistan, Ecologica Montenegrina 54, pp. 81-85 : 82-84

Species: Orsodacne mesopotamicus Legalov , sp. nov. ( Figs. 1 , 2b )

https://zoobank.org/ urn:lsid:zoobank.org:act:9AD7E904-348F-4D4B-98D9-E3C9C8D3A77C

Type material: Holotype, male ( NHML), IRAQ, Kurdistan Region, Erbil Province, Soran District , “N- Iraq, S Rawandoz, Akoian valley, 36°30ˊ N, 44°36ˊ E, ~ 1400 m, 17-25.IV.2017, leg. Reuter ”.

Description. Male: Body black, covered with very sparse semierect setae. Mandibles, labrum, clypeus, pronotum, basal half of elytra, antennomeres 1-4, maxillary and labial palpi, trochanters, basal half of femora, tibiae and tarsi brown-yellow. Antennomeres 5-11, coxae, apical part of femora, apex of tibiae brownish. Head capsule hypognathous, short, weak constricted behind eyes. Labrum free, 2.0 times wider than long, finely and sparsely punctate. Mandibles medium, curved. Eyes rounded, convex, finely faceted. Forehead 1.3 times as wide as width of head at apex, weakly convex, densely punctuate, without grooves. Temples about 0.4 times as short as eye length. Gular suture double. Maxillary palpi 4-segmented. Mentum transverse. Labial palpi 3-segmented. Antennae inserted before eyes, filiform and long, reaching humeri. Antennomere 1 suboval, 1.7 times as long as wide. Antennomeres 2-10 long-conical. Antennomeres 2-4 equal in width. Antennomere 2 about 1.4 times as long as wide, about 0.6 times as long as and 0.7 times as narrow as antennomere 1. Antennomere 3 1.6 times as long as wide, 1.2 times as long as antennomere 2. Antennomere 4 about 1.8 times as long as wide, 1.1 times as long as antennomere 3. Antennomeres 5-8 equal in length. Antennomere 5 1.8 times as long as wide, 1.1 times as long as and about 1.1 times as wide as antennomere 4. Antennomere 6 1.9 times as long as wide, about 1.1 times as long as antennomere 5. Antennomere 7 2.0 times as long as wide, about 1.1 times as long as antennomere 6. Antennomere 8 equal to antennomere 7. Antennomere 9 2.0 times as long as wide, 1.1 times as long as and 1.1 times as wide as antennomere 8. Antennomere 10 2.0 times as long as wide, 1.1 times as wide as and 1.1 times as wide as antennomere 9. Antennomere 11 2.6 times as long as wide, 1.2 times as long as and 0.9 times as narrow as antennomere 10, weakly pointed at apex. Pronotum with weakly arcuate sides in apical and middle thirds, concave before middle, 1.3 times as long as wide at apex, 0.9 times as long as wide in middle, 1.3 times as long as wide at base, sparsely punctate. Distances between punctures larger than their diameters. Disc of pronotum moderately convex. Lateral margin of pronotum not carinate. Base 0.6 times as narrow as elytral base. Scutellum distinct, semi-oval. Elytra subparallel-sided, with weak humeri and distinct epipleuron, without striate, 2.1 times as long as wide at base, 1.9 times as long as wide in middle, 2.2 times as long as wide at apical fourth, 3.0 times as long as pronotum. Distances between punctures larger than their diameters. Scutellar striole present. Procoxal cavities narrowly separated. Precoxal portion of prosternum 1.2 times as long as length of procoxal cavity. Postcoxal portion about 0.2 times as long as length of procoxal cavity. Metaventrite 2.7 times as long as metacoxal length, flattened, punctate. Metanepisterna narrow, about 6.3 times as long as wide in middle. Wings developed. Abdomen with free ventrites. Ventrite 1 2.0 times as long as metacoxal cavity length. Ventrite 2 about 0.8 times as long as ventrite 1. Ventrite 3 0.8 times as long as ventrite 2. Ventrite 4 0.8 times as long as ventrite 3. Ventrite 5 0.9 times as long as ventrite 4. Legs long. Femora thickened. Tibiae quite almost straight, with two spurs, without mucros. Tarsi pseudoquadrisegmented. Tarsomere 1 wide-conical. Tarsomere 2 conical. Tarsomere 3 bilobed. Tarsomeres 1-3 with weak pulvilli on lower surface. Tarsomere 5 long. Trasal claws free and bifid. Protarsi: tarsomere 1 1.4 times as long as wide at apex; tarsomere 2 1.2 times as long as wide at apex, 0.6 times as long as tarsomere 1; tarsomere 3 0.9 times as long as wide at apex, 0.8 times as long as tarsomere 2; tarsomere 5 3.7 times as long as wide at apex, 0.5 times as long as tarsomere 3. Length of body: 4.4 mm.

Differential diagnosis. The new species is close to O. cerasi and is distinguished by a more weakly narrowed pronotum before the base (fig. 1a) and the armament of the endophallus (figs. 2a, 2b). It differs from O. humeralis in the sparsely punctate elytra covered with very sparse semierect setae and the armament of the endophallus (figs. 2b, 2c).

Etymology. From “ Mesopotamia ”.

Distribution. North-eastern Iraq (fig. 3).

Figures

Figure 1. Orsodacne mesopotamicus sp. nov., holotype, dorsal view: a – body, b – abdomen, c – tergite 8, d – tegmen, ventral view. Scale bar for a-b = 1.0 mm, c-d = 0.5 mm.

Figure 2. Orsodacne spp., aedeagus, dorsal view: a – O. cerasi, b – O. mesopotamicus sp. nov., holotype, c – O. humeralis. Scale bar for a-b = 0.5 mm, c = 0.2 mm.