Hyperxiphia punctata Pham, 2023

Pham, P. H., Nguyen, A. T. T. & Nguyen, N. T., 2023, An annotated list and a key to Vietnamese species of the genus Hyperxipha Maa, 1949 (Hymenoptera: Xiphydriidae) with description of a new species, Far Eastern Entomologist 470, pp. 1-7 : 4-6

Hyperxiphia punctata Pham , sp. n.

https://zoobank.org/NomenclaturalActs/ 9C516B82-9758-4510-9E13-EB02ECAA288F

Figs 1–12

MATERIAL. Holotype: ♀, Vietnam: Cao Bang, Ha Quang, Ngoc Dong , 22°46′23″ N, 105°58′29″ E, 312 m, 23. V 2022, coll. Phong Huy Pham ( IEBR) .

DIAGNOSIS. Antenna black, 18-segmented; vertex with distinct, longitudinal carinae medially behind hind ocelli; eyes moderately diverging below; mesopleuron with dense, coarse, large punctures, interspace much smaller than puncture diameter; mesonotum rugoreticulate, black with axillae and metanotum yellowish white; wings hyaline, forewing darkly infuscated subapically; abdominal segments 1–5 reddish brown; abdominal tergites 1, 2, 5, 6, 8 with yellowish white spots laterally; sheath long, about 3.1 × longer than broad, black except reddish brown at base.

DESCRIPTION. Female. Body length 16 mm (measured from the head to the apex of the last abdominal segment), forewing length 11 mm.

Colour. Antenna black ( Figs 1–4 ). Head black except base of mandible, orbits (except upper area), area below antennae, antennal socket, and large band on gena extending to occipital carina near middle area, labial palpus and maxillary palpus (except apical palpomere brown) yellow ( Figs 1–4 ). Thorax black with following yellowish white parts: pronotum except middle area and lateral spots; axillae, upper area of mesopleuron, tegula, metanotum ( Figs 5–8 ), coxae, trochanters, tibiae, basitarsi ( Figs 11, 12 ). Abdomen with segments 1-5 reddish brown, 6 reddish brown except black at apical area, 7 and 8 black, 9 black except yellowish white at apical area, 10 yellowish white; abdominal tergites 1, 2, 5, 6, 8 with yellowish white spots laterally, that on 6 extending to near middle area ( Figs 10–12 ); sheath black with base reddish brown ( Figs 11, 12 ). Wings hyaline, veins and stigma black, forewing darkly infuscated subapically ( Fig. 9 ).

Head ( Figs 1–4 ). Round in frontal view ( Fig. 1 ); mandible with four teeth, apical tooth largest ( Fig. 1 ); labial palpus with 4 palpomeres, first palpomere as long as remaining palpomeres combined; maxillary palpus with 4 palpomeres, its length about 2 × that of labial palpus; antenna 18-segmented, first segment longest, with fine punctures; first and second segments shiny, with sparse, short setae; remaining segments covered with dense setae; relative lengths of antennal segments 1: 2: 3: 4 = 30: 16: 22: 12; frons with longitudinal carinae from level of hind ocelli through supraclypeal area ( Figs 1, 4 ); eyes moderately diverging below, upper interocular distance equal to eye height ( Fig. 1 ); vertex sparsely, finely punctate, with longitudinal median carinae behind hind ocelli ( Figs 2, 4 ); gena with distinct carina ( Fig. 3 ).

Thorax ( Figs 5–9, 12 ). Propleuron shiny, with sparse punctures mostly laterally; pronotum shiny, medial length of pronotum much shorter than depth of excavation of pronotal collar in front ( Fig. 5 ), with diagonal area of short carinae at center. Mesoscutum conspicuously rugoreticulate, with dense, coarse punctures except lateral sides, interspaces much smaller than puncture diameters ( Fig. 6 ); mesoscutellum rugose, shiny, impunctate apically; mesopleuron shiny, with dense, coarse, large punctures, interspaces much smaller than puncture diameters ( Figs 7, 8 ); mesosternum shiny, without punctures; metanotum rugose ( Fig. 6 ); metapleuron densely punctate ( Fig. 7); fore basitarsus equal to remaining tarsomeres combined, hind basitarsus slightly shorter than remaining tarsomeres combined ( Fig. 12 ); all tarsal claws with inner tooth ( Fig. 12 ). Wings hyaline, veins black; forewing darkly infuscated subapically, with costal cell narrow, slightly wider than costa ( Fig. 9 ).

Abdomen ( Figs 10–12 ). Shiny; covered with sparse brownish setae; abdominal tergites 1–5 slightly rugose subapically, with dense, fine punctures; 7 impunctate; 8 with large punctures medially, interspaces equal to puncture diameters; 9 with a few punctures; 10 with long setae apically ( Fig. 10 ); sheath stout and long, near straight in lateral view, about 3.1 × longer than broad, about 0.9 × length of basal plates ( Figs 11–12 ).

Male. Unknown.

DISTRIBUTION. Vietnam: Cao Bang.

ETYMOLOGY. The name of species comes from punctured mesopleuron.

REMARKS. Maculae of the new species are rather similar to those of H. semilutea Smith, 2020 described from Laos ( Smith, 2020), but they are different in the colour and shape. In H. punctata , yellow maculae on the vertex are angulate-shaped after the ocelli and triangle-shaped at the occipital carina (in H. semilutea they are truncated and L-shaped) and maculae on the thorax and the abdomen are yellowish white (in H. semilutea they are white). However, the new species is easily distinguished from the latter by characters as showed in Table 1 .

Figures

Figs 1–6. Hyperxiphia punctata Pham, sp. n., holotype ♀. 1 – head, frontal view; 2 – head, dorsal view; 3 – head, lateral view; 4 – vertex; 5 – pronotum, dorsal view; 6 – thorax, dorsal view.

Figs 7–12. Hyperxiphia punctata Pham, sp. n, holotype ♀. 7 – thorax, lateral view; 8 – mesopleuron; 9 – forewing; 10 – abdomen, dorsal view; 11 – abdomen, lateral view; 12 – habitus, lateral view.