Pristepyris seqalu, Liao & Terayama & Eguchi, 2022

Liao, Hauchuan, Terayama, Mamoru & Eguchi, Katsuyuki, 2022, Revision of Taiwanese and Ryukyuan species of Pristepyris Kieffer, 1905, with description of a new species (Hymenoptera, Bethylidae), ZooKeys 1102, pp. 1-42 : 1

Pristepyris seqalu sp. nov.

Figs 4 , 5

Male diagnosis.

TL ≈ 5.9-6.0 mm. HL/HW × 100 = 98-105. Frons and vertex with shallow foveolae (ca. 0.03-0.05 mm in diameter), of which intervals are smooth and shining and narrower than diameter of foveolae. Anterior clypeal margin incurved medially. Mandible with five apical teeth. Transverse pronotal carina absent. Cervical pronotal area in lateral view round. LP/WP = 1.02-1.20. Metapostnotal median carina complete posteriorly, but fading in anterior half. Tergum II with weak longitudinal sulcus and weak longitudinal ridge, sternum II without longitudinal median carina. Hypopygium with incurved posterior margin. Apical lobe of aedeagus in lateral view short and lobate, weakly curved ventrad.

Female diagnosis.

Unknown.

Male description.

Color. Head black; body dark brown; mandible, antenna and legs brown or light brown; fore- and hind-wings subhyaline, with veins brown or light brown.

Head. Head capsule in full-face view evenly round posteriorly, without remarkable posterolateral corner; HL/HW × 100 = 98-105 (98 in holotype). Occipital carina present. Clypeus imbricate, roundly produced anteriad, with median longitudinal carina which not reach anterior clypeal margin; anterior clypeal margin incurved medially. Frons and vertex with deep foveolae (ca. 0.03-0.05 mm in diameter), of which intervals are smooth and shining and narrower than diameter of foveolae. Compound eye large and convex, with sparse thin and relatively short erect setae. POL:AOL = 12:7; OOL:WOT = 4:3; DAO = 0.12 mm. Mandible with five apical teeth; dorsal face faintly imbricate. Antennomere I (excluding basal neck and condylar bulb) 3 × as long as maximum width; antennomere I:II:III = 17:3:12 in length; antennomere II 1.4 × as long as maximum width, narrowed and bent in basal part; antennomere III-XI each 2.5-4.4 × as long as maximum width; antennomere XII 5.2 × as long as maximum width, elongate-cylindrical; antennomere XIII (terminal) 6.7 × as long as maximum width, with pointed apex.

Mesosoma. Pronotum with pronotal flange extending anteriad beyond anterior margin of propleuron; cervical area in lateral view very steep. Dorsal area of pronotum subtrapezoidal, without distinct transverse pronotal carina (arrow in Fig. 4E ), with incurved posterior margin, with deep foveolae, of which intervals are narrower than diameter of foveolae in anterior half, but wider in posterior half; LPD/WPD = 0.39-0.45 (0.39 in holotype). Mesoscutum smooth and shining in anterior 1/3; area along notauli and parapsidal signum foveolate; notaulus distinct in posterior 2/3 of mesoscutum, not reaching posterior margin; parapsidal signum distinct, almost reaching posterior margin of mesoscutum. Mesoscutellum smooth and shining, with sparse and deep foveolae. Mesoscuto-mesoscutellar suture deep and convex anteriad. Mesopleuron elongate; anterior, upper and lower fovea distinct; acropleural area (raised area surrounding anterior, upper and lower fovea) almost smooth and shining. Mesopleural pit absent. Mesodiscrimen concave, with weak median carina. Metasternum with metafurcal pit. Lateral surface of metapectal-propodeal complex obliquely and strongly rugose in marginal area and weakly rugose with intervals shining in central area. Metapectal-propodeal complex in dorsal view with LP/WP = 1.02-1.20 (1.11 in holotype), with lateral margins subparallel, but slightly convex; metapostnotal median carina distinct, almost complete posteriorly, but fading in anterior half; submedian rugae and sublateral margin distinct, but irregularly running; posterior transverse margin indistinct; dorsomedian face sparsely rugoso-scabrous, with intervals smooth and shining; dorsolateral face densely rugoso-scabrous; median portion of propodeal declivity transversely rugoso-scabrous. Forewing with r-m2 flexion line (arrows in Fig. 4F ), without R2 and 2M12 flexion line. Hindwing with five distal hamuli. Claws bifid, with thin and curved apical teeth.

Metasoma. Tergum II with weak longitudinal sulcus and weak longitudinal ridge; sternum II without longitudinal median carina. Hypopygium (subgenital plate) with spiculum much longer than S9ala; apical margin incurved medially; ventral face of apicomedian part with relatively dense setae. Gonostipes glabrous, unfused to harpe. Harpe in ventral view elongate, slightly curved inward, with blunt apex, entirely covered with setae which increase in length toward apex; median basal portion with concavity which accommodates digitus and cuspis. Cuspis lobate and extending laterad, curled, with short, thick, conical setae near apex; subbasal part facing digitus with short and thin hairs. Digitus extending laterad, curled; lateral face with short, thick, conical setae at apex. Apical lobe of aedeagus in lateral view short and lobate, weakly curved ventrad.

Female description.

Unknown.

Measurements.

Holotype: HL 1.16 mm; HW 1.20 mm; EL 0.56 mm; WOT 0.28 mm; POL 0.12 mm; AOL 0.07 mm; OOL 0.40 mm; DAO 0.11 mm; LM 2.25 mm; LPD 0.47 mm; WPD 1.06 mm; LP 0.86 mm; WP 0.74 mm. Paratypes: HL 1.19-1.28 mm; HW 1.19-1.28 mm; EL 0.56-0.61 mm; WOT 0.30-0.32 mm; POL 0.14 mm; AOL 0.10 mm; OOL 0.40-0.42 mm; DAO 0.10 mm; LM 2.25-2.38 mm; LMT 2.68-2.73 mm; LPD 0.48-0.51 mm; WPD 1.10-1.16 mm; LP 0.85-1.00 mm; WP 0.80-0.87 mm; TL 5.9-6.0 mm.

Material examined.

Holotype. Mt. Kaoshihfo , Pingtung Country, Taiwan, 22°07'53"N, 120°48'42"E, 483 m alt.; Yoto Komeda leg. (sweeping); 19/V/2017; NSMT . Paratypes. 2 males ( TP170606 _11, 13); same data as for holotype; TARI .

Etymology.

This species is named after " Pristepyris seqalu ", an aboriginal people who live primarily in Hengchen Township in Taiwan.

Taxonomic remarks.

This species is most similar in general appearance to P. rugulosus ( Terayama et al. 2002) among the named species known from East and Southeast Asia. According to Terayama et al. (2002), posterior transverse margin of metapectal-propodeal complex is distinct in P. rugulosus , but indistinct in P. seqalu sp. nov.; apical margin of hypopygium is incurved fully in P. rugulosus , but only incurved medially in P. seqalu sp. nov.; apical lobe of aedeagus in lateral view is relatively small and narrow in P. rugulosus , but relatively well-developed, broad and lobate in P. seqalu sp. nov.

Distribution and habitat.

Southern Taiwan; evergreen broadleaf forest.

Figures

Figure 4. Pristepyris seqalu sp. nov., male, holotype (TP 170606 _ 26) A head in full-face view B antenna (left) C mandible D mesosoma in lateral view E mesosoma in dorsal view; arrow indicating transverse pronotal carina absent F fore-wing G hindwing. Scale bars: 0.5 mm.

Figure 5. Pristepyris seqalu sp. nov., male genitalia, holotype (TP 170606 _ 26) A hypopygium B, C genitalia in ventral view D apical lobe in outer-lateral view. Scale bars: 0.2 mm.