Gasteruption ischnolaimum van Achterberg

van Achterberg, Cornelis & Talebi, Ali Asghar, 2014, Review of Gasteruption Latreille (Hymenoptera, Gasteruptiidae) from Iran and Turkey, with the description of 15 new species, ZooKeys 458, pp. 1-187 : 81-82

Taxon classification Animalia Hymenoptera Gasteruptiidae

Gasteruption ischnolaimum van Achterberg sp. n. Figs 250-258

Type material.

Holotype, ♀ (RMNH), "Turkey, Hakkari, S [of] Yüksecova, Varegös, 1650 m, 29.vi.1985, C.J. Zwakhals". Paratypes (3 ♀): 2 ♀ (RMNH), "Museum Leiden, Turkey, prov. Hakkari, Sat Dag, Varegös, SW [of] Yüksecova, 1700 m, 4-8.viii.1983, W. Schacht"; 1 ♀ (RMNH), "N. Iran: Alborz, Shahrestanak, Chalous Road, MT 31, 15-22.vi.2010, S. Farahani, RMNH’12”.

Diagnosis.

Head distinctly convex dorsally in lateral view, in front of occipital carina with obsolescent medio-posterior depression; face wide (Fig. 255); frons and vertex with satin sheen and densely punctulate, vertex anteriorly with some fine punctures between punctulation and posteriorly somewhat coriaceous; occipital carina medium-sized lamelliform, smooth and largely dark brown (Fig. 250); propleuron 0.9 times as long as mesoscutum in front of tegulae and laterally largely coriaceous and with satin sheen; pronotal side finely coriaceous except rather narrow crenulate groove; antesternal carina narrow and slightly lamelliform; middle lobe of mesoscutum finely coriaceous with medium-sized superficial punctures and with satin sheen, lateral lobe and scutellum coriaceous with fine superficial punctures (Fig. 252); mesosoma laterally white pilose except pronotal side medially and largely ventrally (Fig. 251); fore coxa close to mesopleuron; hind basitarsus entirely dark brown; hind tibia slender and with ivory subbasal patch (Fig. 257); fifth and sixth sternites of female dark brown; apical 0.5 of hypopygium of female incised; ovipositor sheath 0.8-0.9 times as long as body, 1.1-1.3 times as long as metasoma, 3.6-3.8 times as long as hind tibia and 2.2-2.4 times as long as hind tibia and tarsus combined; ivory apical part of ovipositor sheath 0.4-0.7 times as long as hind basitarsus (Fig. 254); length of body 11-12 mm.

Description.

Female, length of body 11.0 mm (of fore wing 5.8 mm).

Head. Head distinctly convex dorsally in lateral view, in front of occipital carina with obsolescent medio-posterior depression; face wide (Fig. 255); face and frons anteriorly silvery pilose; occipital carina medium-sized lamelliform and smooth (Fig. 250); third and fourth antennal segments 1.6 and 2.0 times as long as second segment, apical segment 1.2 times as long as penultimate segment; frons and vertex with satin sheen and densely punctulate, vertex anteriorly with some fine punctures between punctulation and posteriorly somewhat coriaceous; temples gradually narrowed behind eyes and resulting in trapezoid head in dorsal view (Fig. 256); ventrally head not enlarged in anterior view, malar space 0.2 times length of pedicellus; mandible dark reddish brown; tibial spurs nearly as dark as hind basitarsus; inner tooth of mandible minute.

Mesosoma. Length of mesosoma twice its height; propleuron 0.9 times as long as mesoscutum in front of tegulae, laterally coriaceous, stout and with satin sheen; pronotal side finely coriaceous except rather narrow crenulate groove; side of pronotum with minute tooth antero-ventrally; antesternal carina narrow and slightly lamelliform; middle lobe of mesoscutum finely coriaceous with medium-sized superficial punctures and with satin sheen, lateral lobe and scutellum coriaceous with fine superficial punctures; medio-posteriorly with some rugae (Fig. 256); notauli distinctly impressed; mesosoma laterally white pilose except pronotal side medially and largely ventrally (Fig. 251); propodeum with complete median carina.

Legs. Length of hind femur, tibia and basitarsus 4.6, 4.9 and 6.1 times their width, respectively; hind tibia and basitarsus slender (Fig. 257); fore coxa close to mesopleuron; hind coxa mainly coriaceous dorsally; hind tibia with some punctures and short greyish bristles; hind basitarsus somewhat widened basally in dorsal view; hind tibial spurs nearly as dark as basitarsus.

Metasoma. Ovipositor sheath 0.9 times as long as body, 1.3 times as long as metasoma, 3.8 times as long as hind tibia and 2.4 times as long as hind tibia and tarsus combined; ivory apical part of ovipositor sheath 0.4 times as long as hind basitarsus (Fig. 254).

Colour. Black; mandible, tegulae and hind tibial spurs dark reddish brown; bases of fore and middle tibiae and subbasal patch of hind tibia ivory; second and third segments orange brown; remainder of legs and metasoma dark brown or blackish brown; pterostigma and veins dark brown; wing membrane subhyaline.

Male. Unknown.

Variation. Length of body of ♀ 10.5-11.6 mm; pronotal side entirely coriaceous or with some rugulae; paratype from Iran has middle lobe of mesoscutum mainly finely transversely rugulose and mesoscutum medio-posteriorly extensively rugose; ovipositor sheath 0.8-0.9 times as long as body, 1.1-1.3 times as long as metasoma, 3.6-3;8 times as long as hind tibia and 2.2-2.4 times as long as hind tibia and tarsus combined; ivory apical part of ovipositor sheath 0.4-0.7 times as long as hind basitarsus.

Distribution.

Iran, Turkey.

Biology.

Unknown. Collected in June and August.

Etymology.

Named after the collector of the holotype and specialist of Ichneumonidae for his contribution to our knowledge of Ichneumonidae and for 50 years collecting of parasitoid Hymenoptera . “Ischnolaimum”, is from “ischnos”, (Greek for “weak”) and “laimos”, (Greek for "throat, neck") and is a translation of the name “Zwakhals”.