Anteon semirugosum Xu, Olmi, Guglielmino & Chen

Xu, Zaifu, Olmi, Massimo, Guglielmino, Adalgisa & Chen, Huayan, 2012, Checklist of Dryinidae (Hymenoptera) from Shaanxi Province, China, with descriptions of two new species, Zootaxa 3164, pp. 1-16 : 9

22. Anteon semirugosum Xu, Olmi, Guglielmino & Chen , sp. nov.

( Fig. 2 )

Etymology. This species is named after the head sculpture, partly rugose and partly smooth.

Type. Holotype, Ƥ, CHINA: Shaanxi Province, Ningshan County, Guanghuojie Town, 7-8.V. 2011, Huayan Chen coll. [ SCAU].

Diagnosis. Female with face rugose, except posterior third punctate and unsculptured among punctures; posterior surface of pronotum about as long as anterior surface, about 0.5 as long as scutum, about three times as broad as long; notauli reaching approximately 0.6 length of scutum; forewing hyaline, without dark transverse bands; posterior surface of propodeum with two longitudinal keels and median area as rugose as lateral areas; segment 4 of protarsus slightly longer than segment 1; segment 5 of protarsus with basal part much shorter than distal region ( Fig. 2 ).

Description. Female: fully winged; length 3.3 mm. Head black, except mandible testaceous; antenna brown, except segments 1–2 and ventral side of 7-10 testaceous; mesosoma black; metasoma brown; legs yellow, except stalk of metafemur brown. Antenna clavate; antennal segments in following proportions: 12:7:9:8:7:6:6:6:6:9. Head shiny, with face rugose, except posterior third punctate and unsculptured among punctures; ocelli connected by weak keels; temple and area behind posterior ocelli punctate, smooth, very weakly granulated, with two oblique keels connecting posterior ocelli to occipital carina; frontal line incomplete, only shortly present in front of anterior ocellus; POL = 4; OL = 3; OOL = 6; OPL = 6; TL = 5; greatest breadth of posterior ocelli shorter than OPL (2.5:6); occipital carina complete. Pronotum shiny, with anterior surface rugose, about as long as posterior surface; posterior surface smooth, punctate, unsculptured among punctures, much shorter than scutum (7:16), about three times as broad as long; pronotal tubercle reaching tegula. Scutum and scutellum shiny, smooth, punctate, unsculptured among punctures. Notauli incomplete, reaching approximately 0.6 length of scutum. Metanotum dull, reticulate rugose. Propodeum with strong transverse keel between dorsal and posterior surface; dorsal surface reticulate rugose; posterior surface with two complete longitudinal keels and median area as rugose as lateral areas. Forewing hyaline, without dark transverse bands; distal part of stigmal vein shorter than proximal part (6.5:13). Protarsal segments in following proportions: 7.5:3:3.5:10:22. Enlarged claw ( Fig. 2 ) with proximal prominence bearing one long bristle. Segment 5 of protarsus ( Fig. 2 ) with two rows of 10 + 14 lamellae; distal apex with 5 lamellae. Tibial spurs 1/1/2.

Male: unknown.

Hosts. Unknown.

Distribution. Only known in the type locality.

Remarks. Because of the characters summarized in the above diagnosis, in the Oriental region this species is similar to Anteon wangi Xu, He & Olmi 2001 . The new species can be included in the key to the males of the Oriental species of Anteon published by Xu et al. (2001) by replacing couplet 61 as follows:

61 Notauli almost complete.................................................................... A. flaccum Olmi - Notauli reaching approximately 0.6 length of scutum....................................................... 61’ 61’ Face punctate, unsculptured among punctures; posterior surface of pronotum about as long as scutum....................

................................................................................ A. wangi Xu, He & Olmi - Face rugose, with posterior third punctate, unsculptured among punctures; posterior surface of pronotum about 0.5 as long as

scutum................................................ A. semirugosum Xu, Olmi, Guglielmino & Chen , sp. nov.

Because of the characters summarized in the above diagnosis, in the Palaearctic region the new species is similar to Anteon exiguum ( Haupt, 1941) . The new species can be included in the key to the males of the Palaearctic species of Anteon published by Olmi (1999), modified by Olmi (1995b), Xu et al. (2001) and He & Xu (2002), by replacing couplet 11 as follows:

11 Pronotum with posterior surface transverse, more than twice as broad as long................................... 11’ - Pronotum with posterior surface approximately as long as broad, occasionally broader than long, but then never more than

twice as broad as long................................................................................ 12 11’ Segment 5 of protarsus with basal region about as long as distal region................. A. septentrionale Xu, He & Olmi - Segment 5 of protarsus with basal part much shorter than distal part ( Fig. 2 ).................................... 11’’ 11’’ Prothorax testaceous-reddish; posterior surface of pronotum less than three times as broad as long......... A. hikense Olmi - Prothorax black; posterior surface of pronotum at least three times as broad as long.............................. 11’’’ 11’’’ Head punctate, unsculptured among punctures................................................ A. exiguum (Haupt) - Head with face mostly rugose, rest of head punctate and unsculptured among punctures.................................................................................... A. semirugosum Xu, Olmi, Guglielmino & Chen , sp. nov.

Figures

FIGURES 1, 2. 1. Anteon ningshanense sp. nov., holotype, genital armature (right half removed). 2. A. semirugosum sp. nov., holotype, chela. Scale bar 0.09 mm for fig. 1 and 0.11 mm for fig. 2.