Streblocera (Eutanycerus) hatinhensis Mai & Long & Hiep & Hoa & Duong 2025, sp. nov.
Year: 2025
Type: other
Abstract: Streblocera (Eutanycerus) hatinhensis Long, sp. nov. Figs 3, 4, 21 Type material. Holotype, ♀, labelled “Euph. 195 ” (IEBR), NC Vietnam: Ha Tinh, Huong Son, Rao An, forest, 200 m, sweep (nets), 14.v.1998, KD Long. Diagnosis. Scapus slender, without tooth-shaped horn subbasally; length of scapus 7.6 × its maximum width, and 1.8 × of head height in dorsal view; first flagellomere 1.2 × as long as second flagellomere; seventh flagellomere with distinct like-horn process; occipital carina complete medio-dorsally; propodeum with subbasal areola. Notes. S. (E.) hatinhensis, sp. nov. is relatively close to S. (E.) nectrangana, sp. nov. and S. (E.) opima but can be separated by occipital carina complete and propodeum with subbasal areola; and the other differences between them are given in the key. Description. Holotype, ♀; body length 2.5 mm, fore wing length 2.5 mm, ovipositor sheath 0.4 mm (Fig. 3). Head. Antenna with 20 antennomeres; length of scapus 7.6 × its maximum width (Fig. 4E); first flagellomere 1.2 × second flagellomere; first to seventh flagellomeres straight ventrally; seventh flagellomere with a long, distinct like-horn process (Fig. 4E); length from eighth flagellomere to apex of antenna 1.2 × as long as scapus; in dorsal view, occipital carina complete medio-dorsally (Fig. 4A), width of head 1.5 × its median length, and 1.6 × width of mesoscutum (without tegulae), respectively; temple roundly narrowed behind eye; length of eye 2.3 × as long as temple; eye 2.0 × as high as broad; ocelli small, POL: OD: OOL = 3: 3: 8 (Fig. 4A); in lateral view, transverse diameter of eye twice length of temple medially; in frontal view, diameter of antennal socket 1.2 × between sockets; clypeus margin straight; malar space as long as basal width of mandible, and 0.3 × as long as eye height; distance between tentorial pits 1.5 × distance from pit to eye margin; face finely rugo-punctate; clypeus coriaceous, with sparse fine punctures (Fig. 4B); frons flat, mostly smooth, with sparse striate rugosities close to antennal sockets (Fig. 4A); temple and vertex polished smooth. Mesosoma. In lateral view, length of mesosoma 1.5 × as long as its height; notauli rather shallow and smooth anteriorly, wider posteriorly and fusing into posterior rugose area (Fig. 4D); prescutellar sulcus wide, deep, 0.3 × as long as scutellum, with one carina (Fig. 4D); lateral lobes of mesoscutum and scutellum smooth; median lobe of mesoscutum coriaceous anteriorly, rugo-punctate medio-posteriorly; pronotal side sparsely crenulated medially, smooth dorsally and ventrally (Fig. 4C); precoxal sulcus wide, rugose; mesopleuron smooth; metapleuron rugose; propodeum with a short basal carina and sub-basal areola, with divergent carina medially, connecting lateral rugosities, sparsely finely rugose posteriorly (Fig. 4G). Wings. Length of pterostigma 3.0 × its width, 1.8 × vein 1-R1 (Fig. 4H); vein r arising behind middle of pterostigma, 0.2 × as long as width of pterostigma, and 0.2 × vein 1-R1; vein 3-SR+SR1 widely curved (Fig. 4H); vein 1-CU1 short, 0.6 × cu-a; vein cu-a 0.35 × 2-CU1; vein 1-M of hind wing very short; 1-M: 1r-m: 2-SC+R = 2.5: 5: 5. Legs. Length of hind femur, tibia and basitarsus 7.0, 11.75 and 9.0 × as long as their maximum width, respectively; hind basitarsus 0.4 × hind tibia, and 0.75 × second-fifth tarsus combined; fourth hind tarsus 0.7 × as long as fifth tarsus (without pretarsus). Metasoma. First metasomal tergite rather long, length of first tergite 2.2 × its apical width, apical width of first tergite 2.5 × its minimum width; ovipositor sheath 0.2 × fore wing, and 0.7 × first tergite; ovipositor weakly curved upwards; first metasomal tergite smooth basally, striate medially and apically; dorsal carinae of first tergite convergent and nearly united medially (Fig. 4F); the rest tergites highly smooth. Colour. Head and mesosoma yellow; scapus and pedicel yellow; flagellum brownish yellow; eyes brown; all legs pale yellow; first metasomal tergite, second-third tergites yellow, the remainder and ovipositor sheath brownish yellow; wing veins yellow; wing membrane hyaline. Male. Unknown. Host: Unknown. Etymology. Named after type locality, Ha Tinh province, North Central Vietnam. Distribution. NC Vietnam: Ha Tinh province (Huong Son) (Fig. 21).
Authors: Mai, Pham Quynh, Long, Khuat Dang, Hiep, Nguyen Duc, Hoa, Dang Thi, Duong, Tran Dinh
Language: English
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W6949914543
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