Pristaulacus emarginaticeps Turner, 1922

Kuroda, Keita, 2018, Discovery of the male of a rare aulacid wasp, Pristaulacusemarginaticeps Turner, 1922 (Hymenoptera: Aulacidae) from Vietnam and Laos, Biodiversity Data Journal 6, pp. 26198-26198 : 26198

Pristaulacus emarginaticeps Turner, 1922

Pristaulacus emarginaticeps Turner, 1922: 270.

Materials

Type status: Other material. Occurrence: recordedBy: native collector; individualCount: 2; sex: 2 males; lifeStage: adult; Taxon: scientificName: Pristaulacusemarginaticeps; order: Hymenoptera; family: Aulacidae; Location: country: Vietnam; countryCode: VN; stateProvince: Hà Tĩnh Province; Identification: identifiedBy: Keita Kuroda; dateIdentified: 2018; Event: eventDate: May 2017; Record Level: language: English; institutionCode: EUMJ; basisOfRecord: PreservedSpecimen Type status: Other material. Occurrence: recordedBy: J. Yamasako; individualCount: 1; sex: 1 female; lifeStage: adult; Taxon: scientificName: Pristaulacusemarginaticeps; order: Hymenoptera; family: Aulacidae; Location: country: Laos; countryCode: LAO; stateProvince: Houaphanh Province; locality: Mt. Phou Pan, Ban Saleui, near Xam Neua ; Identification: identifiedBy: Keita Kuroda; dateIdentified: 2018; Event: eventDate: 5 May 2003; Record Level: language: English; institutionCode: EUMJ; basisOfRecord: PreservedSpecimen

Description

Description of male (Fig. 1a). Colour black; scape entirely reddish-brown; segments 1 and 2 of maxillary palpi brown; apical and basal 1/4 of fore femur brown; fore tibia and tarsus brown; apical and basal tips of mid femur brown; mid tibia and tarsus brown to black; apical and basal tips of hind femur brown; hind tibia brown to black; spurs brown; wings hyaline and tinged with brown, stigma black and vein black to brown; apical half of fore wing strongly infuscate, area along veins M+Cu, 1cu-a and basal half of A infuscate; setae brown to light brown except setae on mandible and clypeus light reddish-brown, setae on maxillo-labial palpus and paraocular area pale yellow.

Head (Fig. 2a-c) smooth and shiny, 0.6-0.7 times as long as wide; malar space 0.3 times as long as eye height; median portion of occipital margin strongly grooved; lower 2/3 of occiput with long setae with punctures; occipital carina distinct and complete; vertex, temple and frons sparsely punctate with setae; POL/OOL = 1.2-1.3; antennal socket situated at lower level of eye; face punctuate with long setae; paraocular area with long setae and punctures; clypeus punctate and with dense setae; mandible smooth, basal 2/3 densely punctate with evenly distributed strong setae (Fig. 7a); antenna (Fig. 1b) with 11 flagellomeres, finely punctate with setae and 5.0 times as long as head length; scape 1.6-1.9 times as long as wide; pedicel 2.0-2.2 times as long as wide; 1st flagellomere 2.2-2.6 times as long as wide, 0.7 times as long as 2nd.

Mesosoma (Fig. 3a-b) shiny, punctate with fine setae; pronotum reticulate rugose to foveolate, with diagonally transverse canaliculate groove and with 2 tooth-like processes on antero-ventral margin (red arrows in Fig. 3b), one antero-ventral other ventral; mesoscutum reticulate rugose with a pair of lobes on anterior margin projecting strongly forward, the front profile of mesoscutum prominent and slightly pointed in lateral view (blue arrow in Fig. 3b); notauli canaliculate, deep and wide, meeting at median portion of mesoscutum; mesoscutellum reticulate rugose; axillula reticulate rugose to canaliculate; mesopleuron reticulate rugose; metanotum reticulate rugose; metapleuron reticulate rugose; propodeum reticulate rugose except anterior marginal groove longitudinally canaliculate.

Legs: Coxae setose; fore coxa smooth; mid and hind coxae trans-striate on dorsal side; tibiae and tarsi with dense setae and punctures; hind basitarsus 9.2-11.0 times as long as wide; tarsal claws with 6 tooth-like processes.

Wings (Fig. 4): Fore wing 2.8-3.0 times as long as wide, apex rounded; hind wing weakly tapering toward rounded apex, 3.6-3.9 times as long as wide and with 4 distal hamuli.

Metasoma pyriform in lateral view, shiny and covered with sparse setae and punctate; petiole 2.9-3.2 times as long as wide.

Genitalia: Apical margin of subgenital plate emarginate medially (Fig. 5d); paramere subtriangular (Fig. 5a-b); cuspis finger-like shape, moderately curved and its apex punctate (Fig. 5b); digitus triangular (Fig. 5b); penis valve slightly curved ventrally (Fig. 5c); basal apodeme of aedeagus weakly curved dorsally.

Measurements. Body length 18.5-20.0 mm. Length of fore wing 13.6-14.1 mm.

Measurement of female from Laos

Body length 16.3 mm. Length of fore wing 13.6 mm. Ovipositor 13.2 mm. Head 0.8 times as long as wide; malar space 0.3 times as long as eye height; POL/OOL = 1.4; antenna 3.6 times as long as head length; scape 1.6 times as long as wide; pedicel 2.2 times as long as wide; 1st flagellomere 2.5 times as long as wide, 1.5 times as long as 2nd; hind basitarsus 7.9 times as long as wide; fore wing 3.0 times as long as wide, apex rounded; hind wing 3.9 times as long as wide; Petiole could not be measured because it was deformed; ovipositor 1.0 times as long as fore wing.

Diagnosis

Male and female. Pronotum with 2 tooth-like marginal processes laterally, one anteroventral other ventral (Fig. 3b); mesoscutum with a pair of strongly projecting forward lobes on anterior margin (Fig. 3a), the front profile of mesoscutum prominent and slightly pointed in lateral view (Fig. 3b); notauli canaliculate, deep and wide (Fig. 3a); tarsal claws with 6 tooth-like processes.

Distribution

Laos (1 female from Houaphanh Province), Vietnam (holotype female from Hòa Bình Province, 2 males from Hà Tĩnh Province).

Biology

Examined specimens were collected in May and the holotype was collected in August.