Pristaulacus exuberans Turrisi and Smith, 2020

Turrisi, Giuseppe Fabrizio & Smith, David R., 2020, Three New Species Of Aulacidae (Hymenoptera: Evanioidea) With Additional Records From Thailand And Laos, Proceedings of the Entomological Society of Washington 122 (1), pp. 197-210 : 198-201

Pristaulacus exuberans Turrisi and Smith , sp. nov.

( Figs. 1–7 ) http://zoobank.org/ E58198CE- 8699-40BA-8CED-12BD91D696B8

Type material. — THAILAND: Holotype ♀ “ Thailand, Loei, Phu Kradueng NP, Dry evergreen, Pong Neep forest unit, 16 ° 56.59 ̍ N101 ° 42.07 ̍ E, 273 m, Malaise trap, 12-19.iv.2008, Thonghuay Phatai leg., T5110 / Pristaulacus exuberans Turrisi & Smith , sp. nov. ♀, 2018, Holotypus ” (QSBG). Paratypes: 2♀ ” Thailand, Sakon Nakhon, Phu Phan, Car Park at Nam Hom Waterfall , 17 ° 7.411 ̍ N104 ° 1.016 ̍ E, 347 m, Malaise trap, 25-31.iii.2007, SailomTongboonchai leg., T2376 (QSBG, USNM); 1♀ “ Thailand, Loei, Phu Kradueng NP, Mixed deciduous/office, 16 ° 56.51 ̍ N101 ° 41.66 ̍ E, 274 m, Malaise trap, 26.iv-3.v.2008, Thonghuay Phatai leg., T5125 (QSBG) ; 1♀ “ Thailand, Loei, Phu Kradueng NP, Nampong / Pong Neep forest unit, 16 ° 56.59 ̍ N 101 ° 41.61 ̍ E, 273 m, Malaise trap, 12- 19.iv.2008, Thonghuay Phatai leg., T5128 (QSBG); 1♀ “ Thailand, Mae Hong Son, Namtok MaeSurin, NP Haad, Saen, 19 ° 20.857 ̍ N97 ° 59.123 ̍ E, 274 m, 1-8.vi. 2008, KaewmaneeJ. leg., T3527 (QSBG). Etymology — The name is derived from the Latin adjective exuberans (exuberant, plenty), referring to the striking colour pattern.

Diagnosis.—Large-sized species, body length: 13.3 mm (excluding ovipositor). Colour mostly light orange, except most of antenna, lower part of mesopleuron, coxae and hind leg, and metasoma black. Setae: goldish. Head subquadrate, temple, from above, well developed, subparallel and rounded posteriorly, 0.8 X eye length; occipital margin straight; occipital carina very narrow, about 0.1 X diameter of ocellus, very weak medially; mesosoma coarsely sculptured, mostly areolaterugose; pronotum with one anterior stout, squared, forwarded tooth-like process on lateroventral margin; anterior margin squared not overhanging pronotum; fore wing with vein 2-rs+m moderately long; coxa III transverse-carinate dorsally, polished punctate ventrally; tarsal claw pectinate with five tooth-like processes (basal one very weak) metasoma ovoidal (lateral view) fairly compressed; petiole short, stout, about as long as wide; ovipositor 1.0 X fore wing length.

Description — Female (holotype): Length: 13.3 mm; antenna length: 7.9 mm; forewing length: 10.8 mm; ovipositor length: 11.3 mm. Colour: Light orange except: most of antenna, lower part of mesopleuron, coxae and hind leg, and metasoma black; wings yellowish with irregular dark mark on cells B and SB, an irregular long substigmal light brown band extending to cell D2, and extreme distal margin infuscate. Head: From above, 1.06 X wider than long, dull; occipital margin straight; temple, from above, well developed, subparallel and rounded posteriorly, 0.82 X eye length; occipital carina very narrow, about 0.1 X diameter of ocellus, very weak medially; POL:OOL: 1.3; ocellar area 2.0 X wider than long; vertex and most frons with moderately coarse, deep and dense to very dense punctures (distance between punctures 0.5–1.0 X puncture diameters); lower frons with fine, superficial and scattered punctures (distance between punctures 3.0–5.0 X puncture diameters); clypeus with very coarse, superficial and dense punctures (distance between punctures 1.0–1.5 X puncture diameters); temple with fine, deep and scattered punctures (distance between punctures 3.0–5.0 X puncture diameters); malar area with moderately coarse, deep and very dense punctures (distance between punctures 0.5–1.0 X puncture diameters); antenna 0.8 X forewing length; A3 4.6 X longer than wide; A4 5.5 longer than wide and 1.4 X than A3; A5 5.1 X longer than wide and 1.2 X than A4. Setae: erect, short and dense on vertex and upper frons; recumbent, moderately long and scattered to moderately dense on lower frons and clypeus; erect, short and scattered to moderately dense on temple (length of setae 0.5 X diameter of ocellus); recumbent, short and moderately dense on malar area. Mesosoma: Coarsely sculptured mesosoma mostly areolate-rugose except anterolateral margin of pronotum foveolate and upper part of mesopleuron polished and punctate; pronotum with one anterior stout, squared, forward protruding toothlike process on lateroventral margin; propleuron polished and shiny with moderately coarse, superficial and moderately dense punctures (distance between punctures 2.0–3.0 X punctures diameter; prescutum triangular, wide, almost not incavate; mesoscutum with anterior margin square (lateral view); notauli wide and very deep; fore wing with vein 2-rs+m very short; coxa I polished punctate; coxa II transverse-carinulate dorsally, polished punctate to striolate ventrally; coxa III transverse-carinate dorsally, polished punctate ventrally, punctures fine, deep and moderately dense (distance between punctures 2.0–3.0 X puncture diameters); inner spur of mid tibia fairly longer than outer spur; inner spur of hind tibia slightly longer than outer spur; hind basitarsus 9.2 X longer than wide, and 1.0 X as tarsomeres 2–5; tarsal claw pectinate with five tooth-like processes (basal one very weak). Setae: erect, short and moderately dense on dorsal surface; semierect to recumbent, short and moderately dense on lateral and ventral parts, longer and denser on anterior margin of pronotum; erect, moderately long and moderately dense on hind surface of propodeum; erect, moderately long and dense on propleuron (length of setae 0.5-0.6 X pretarsus length). Metasoma: Ovoidal (lateral view) fairly compressed petiole short, stout, about as long as wide; T1 medially punctate-foveolate, polished impunctate otherwise; remaining segments polished punctate, punctures fine, superficial and dense to very dense; ovipositor 1.0 X fore wing length. Setae: metasomal segment 1 and sides of sternites glabrous; otherwise recumbent, very short and moderately dense.

Male: Unknown.

Variation.—The colour is stable in the six females examined. The length slightly varies from 12.8–13.8 mm and the forewing length from 10.4–11.1 mm. Distribution. — Thailand (Loei, Mae Hong Son, and Sakon Nakhon provinces). Biology. — Unknown.

Remarks. — This is a distinctive species resembling Pristaulacus flavipennis Cameron, 1887 , but characterized especially by the colour pattern: wings pigmented with several irregular dark marks basally, under stigma and distally; propodeum black. The hind tarsus is slender and hind coxa transversecarinate. The colour of mesosoma resembles Pristaulacus erythrocephalus Cameron, 1905 , but the latter is distinguished mainly by the non-infuscated wings.

Figures

Figs. 1–7. Pristaulacus exuberans. 1, Head, front. 2, Head, lateral. 3, Head, dorsal. 4, Mesosoma, lateral. 5, Mesosoma, dorsal. 6, Wing. 7, Metasoma.