Eurytoma trjapitzini Zerova et Klymenko, 2018

Zerova, M. D. & Klymenko, S. I., 2018, A New Species Of The Genus Eurytoma (Hymenoptera, Chalcidoidea, Eurytomidae) From The Galls Of Liposthenes Glechomae (Hymenoptera, Cynipidae), Vestnik Zoologii 52 (3), pp. 229-234 : 230-231

Eurytoma trjapitzini Zerova et Klymenko , sp. n.

Material. Holotype}: Ukraine, Hlevakha, [50.27º N 30.26º E], “from galls of Aylax glechomae Kieffer [= Liposthenes glechomae (Linnaeus) ] ( Cynipidae ) on Glechoma hederacea L. [= Nepeta hederacea L.] ( Lamiaceae ), galls leg. 30.06.2017, reared 14.07.2017 (Klymenko leg.) ( SIZK). Paratypes: 4}, 5 {, same labels as in the holotype (Klymenko leg.) ( SIZK).

Description. Female (figs 1–3, 6). Body length 1.7–2.3 mm, holotype 2.0 mm. Head, mesosoma and metasoma black, antennae black, coxae, femora and tibiae black, only knees dark brown, tarsi dark yellow, tip of ovipositor black, venation light yellow, forewings hyaline.

Head from above considerably wider than pronotum, twice as wide as long; head in frontal view 1.3 times wider than its length; temples narrowed to mouth margin; POL 2.2 times wider than OOL; ratio of malar space to eye length 1.6: 1; eye bare, without border around eye orbit; postgenal keel distinct but not very high; external margin of clypeus straight, all surface of face with umbilicate puncture and thick short pubescence. Face cavity shallow, without sharp border. Antenna inserted in the middle of face height; scape extended to middle ocellus level, long, 7 times as long as wide; pedicel very small, twice as short as the first funicle segment; anellus flattened; all funicle segments long, first segment 2.1 times as long as wide, segments 2–5 equal in length, 1.75 times as long as wide, club 3-segmented, not wider then flagellum, funicle with thick pubescence.

Mesosoma not bulging, prothorax long, 1.5 times wider than long, much narrow- er than head from above, mesoscutum as long as scutellum; dorsal surface of thorax with deep punctated sculpture. Propodeum with deep wide median furrow. Mesosternal keel absent. Coxae without distinct sculpture; hind tibia with many (12–15) long setae, 5 setae on proximal part of tibia conspicuously longer than others; hind femur with row of long setae.

Fore wing hyaline, with very short brown pubescence on distal two-thirds of wing discus; ratio of marginal, postmarginal and radial veins: 1.8: 1.5: 1.

Metasoma 1.25 times longer than mesosoma (in profile), all tergites flat, without any sculpture and pubescence, only the 6th tergite with some sparse and very short hairs.

Male (fig. 4, 5). Length of body 1.3–2.0 mm, abdomen short and round with long petiolus as long as hind coxa (in profile). Antenna long, scape slightly gibbous; funicle with long white pubescence, with 5 segments and 2-segmented club.

C o m m e n t s. Eurytoma trjapitzini sp. n. belongs to the pistaciae species group ( Zerova, 1995, 2010). It differs from all other species of this group by the numerous setae on hind tibia and a row of setae on hind femur. Other species of this group have at most 2–3 long setae on hind tibiae.

All the species of the pistaciae group are the parasites of gall-inducing insects, mainly Cynipidae . The new species was reared also from cynipid galls.

Etymology. The new species is named in honor of Prof. V. A. Trjapitzin, prominent entomologist and hymenopterist, for his 90th birthday.

1 2

3 4

5 6

1 — E. trjapitzini , sp. n., female; 2 — female, flagellum; 3 — female, head (frontal view); 4 — E. trjapitzini , sp. n., male; 5 — male, flagellum; 6 — female, hind tibia.