Spilopteron lamdongensis, Pham & Broad & Matsumoto & Achterberg, 2019

Pham, Nhi Thi, Broad, Gavin R., Matsumoto, Rikio & Achterberg, Cornelis Van, 2019, First records of the genus Spilopteron Townes (Hymenoptera: Ichneumonidae: Acaenitinae) from Vietnam, with descriptions of five new species, Zootaxa 4590 (1), pp. 153-165 : 156-158

Spilopteron lamdongensis sp. nov.

( Fig. 4 )

Material examined. Holotype: 1♀ ( IEBR), Lam Dong Province, Lac Duong, Giang Ly , 3.vi.2013, hand net, T.V. Hoang leg.

Description of holotype female. Head. Antenna with 35 flagellomeres, first flagellomere 1.4× length of second; frons concave and polished medially, punctate laterally, carina between antennal sockets extending to face dorsally; face 0.6× as high as wide, densely punctate; clypeus about 0.45× as high as wide, subpolished, with sparse punctures, median and lateral tubercles distinct; malar space 0.85× as long as basal width of mandible; exposed part of labrum about 0.55× as long as basal width; inner margins of eyes divergent ventrally; diameter of lateral ocellus 0.6× ocellar-ocular distance; vertex with dense, small punctures; occipital carina evenly curved, ventrally meeting hypostomal carina about 1.1× basal mandible width from base of mandible.

Mesosoma. Epomia distinct, as long as mandible basal width; pronotum with weak striations next to epomia, posterior corner densely, minutely punctate; mesoscutum as long as wide at anterior level of tegulae, with dense punctures, pubescent; scutellum densely punctate, pubescent, lateral carina extending to middle; metanotum polished, impunctate; mesopleuron with dense, small punctures, pubescent, epicnemial carina extending to subtegular ridge but interrupted subdorsally; metapleuron mat, with dense, small punctures, pubescent, submetapleural carina indistinct medially; propodeum with area basalis smooth, posterior carina concave medially, area externa densely punctate, pubescent, area dentipara defined, level of area superomedia with irregular striations, area petiolaris polished, impunctate; fore basitarsus 2.3× second tarsomere; mid basitarsus 2.5× second tarsomere; hind leg with femur 4.2× as long as wide, 0.68× length of tibia, basitarsus 2.3× second tarsomere. Fore wing length 10.4 mm, vein M&RS distad of 1 cu-a, vein 2 rs-m opposite 2 m-cu, hind wing with first abscissa of vein CU 0.7× length of vein cu-a.

Metasoma. Tergites with small punctures, pubescent; first tergite 2.5× as long as posterior width, with sparse punctures, lateral longitudinal carina present anteriorly, not extending to spiracle; second tergite 0.37× as long as first tergite, wider than long, slightly longer than third; sclerotized part of first sternite not reaching level of spiracle, extending about 0.7× length of tergite; ovipositor sheath 1.8× as long as hind tibia; hypopygium 2.4× as long as second tergite.

Colour. Pale reddish with brown markings on mesoscutum, propodeum anteriorly and metasomal tergites, flagellomeres black.

Male. Unknown.

Comparison. In Wang & Li (2004), the new species keys to Spilopteron splendidum Wang, 1988 . It differs from the latter in colour pattern; in S. splendidum the body is reddish (including flagellomeres) with many black markings on the vertex and mesosoma. In addition, Spilopteron splendidum has a complete submetapleural carina and a longer hypopygium.

Etymology. This species is named after its type locality.

Distribution. Currently known only from the holotype, collected in Giang Ly, Lac Duong District, Lam Dong Province, Central Highlands of Vietnam.

Figures

FIGURE 4. Spilopteron lamdongensis sp. nov., holotype female: a. habitus, dorsal view; b. face; c. dorsal view of head and mesoscutum; d. dorsal view of propodeum.