Ctenopelma pineatum Sheng, Sun & Li, 2019

Sun, Shu-Ping, Sheng, Mao-Ling & Gao, Chun, 2019, The species of Ctenopelma Holmgren (Hymenoptera, Ichneumonidae) from China, European Journal of Taxonomy 545, pp. 1-31 : 16-20

Ctenopelma pineatum Sheng, Sun & Li sp. nov.

urn:lsid:zoobank.org:act:BF6D5A2C-662E-449B-A6D0-E0BB79DCBBF6

Figs 35–42

Diagnosis

Antenna with at least 50-segmented flagellum and about setiform apex. Second and third tergites longer than their posterior width. Anterior half of second tergite strongly irregularly rugose, posterior half almost smooth, shiny, with distinct punctures. Ovipositor sheath ( Fig. 42 ) approximately 2.5 × as long as wide, along lower margin with distinct parallel groove. Head (almost entirely), mesosoma, metasoma, hind leg, and ovipositor sheath black.

Etymology

The name of the new species is based on the host plant’s name.

Material examined

Holotype

CHINA • ♀; Henan Province, Lushi, Dongwan Forest Farm; alt. 1214 m; 13 Apr. 2012; reared from cocoon of Acantholyda posticalis (Matsumura, 1912) by Tao Li; GSFGPM.

Paratypes

CHINA – Heilongjiang Prov. • 1 ♀; Linkou ; 13 Jul. 2003; GSFGPM . – Henan Prov. • 1 ♀; Lingbao ; alt. 1059 m; 22 May 2004; reared from cocoon of Acantholyda posticalis (Matsumura, 1912) by Mao- Ling Sheng; GSFGPM • 1 ♀; Lingbao ; 10 May 2008; reared from cocoon of A. posticalis (Matsumura, 1912) by Mao-Ling Sheng; GSFGPM • 1 ♀; Lushi ; 22 May 2008; reared from cocoon of A. posticalis (Matsumura, 1912) by Mao-Ling Sheng; GSFGPM • 3 ♀♀, 20 ♂♂; Lingbao ; alt. 1050 m; 30 Apr. 2009; reared from cocoons of A. posticalis (Matsumura, 1912) by Mao-Ling Sheng; GSFGPM • 1 ♀; Lingbao ; 11 May 2010; Tao Li leg.; GSFGPM . – Beijing • 22 ♀♀, 11 ♂♂; Mentougou ; 25 May–9 Jun. 2009; reared from cocoons of Cephalcia lariciphila (Wachtl, 1898) by Tao Wang; GSFGPM • 1 ♀; Mentougou ; 2 Jun. 2012; Shi-Xiang Zong leg.; GSFGPM. – Shan’xi Prov . • 1 ♀; Yongshou ; 2 Feb. 2010; reared from cocoons of A. posticalis (Matsumura, 1912) by Tao Li; GSFGPM . – Jilin Prov. • 1 ♀; Lushuihe ; alt. 600 m; 6 Jul. 2010; Shu-Ping Sun leg.; GSFGPM . – Shanxi Prov. • 5 ♀♀, 9 ♂♂; Pinglu ; alt. 965 m; 14–18 Apr. 2012; reared from cocoons of A. posticalis (Matsumura, 1912) by Tao Li; GSFGPM . – Liaoning Prov. • 1 ♀; Kuandian ; alt. 600 m, 16 Jun. 2017; Tao Li leg.; GSFGPM .

Description

Female

MEASUREMENTS. Body length 10.0–13.0 mm. Fore wing length 8.0– 10.5 mm. Ovipositor sheath length approximately 0.8 mm.

HEAD. Inner eye margin slightly concave opposite antennal socket. Face ( Fig. 36 ) 1.4–1.6 × as wide as long, strongly convex, alutaceous, with sparse uneven fine punctures. Clypeus approximately 3.0 × as wide as long; transversely convex medialy, smooth; basal portion with texture as that of face; apical portion depressed, smooth. Mandible with sparse punctures and gray setae. Upper tooth almost as long as lower tooth. Malar space very short, approximately 0.1 × as long as basal width of mandible. Gena ( Fig. 37 ) almost smooth, evenly convergent posteriorly, with fine punctures. Vertex ( Fig. 38 ) smooth, shiny, with uneven fine punctures. Postocellar line approximately as long as ocular-ocellar line. Frons almost flat, with median groove. Antenna with 50–54 flagellomeres. Ratio of length from first to fifth flagellomeres: 8.5:6.5:6.0:5.5:5.5. Occipital carina complete, lower end reaching base of mandible.

MESOSOMA. Anterior portion of pronotum with indistinct longitudinal lines and fine punctures, lateral concavity along epomia with irregular short oblique wrinkles, upper-posterior portion with distinct, dense, fine punctures. Epomia distinct. Mesoscutum with even, dense fine punctures. Scutellum and postscutellum with punctures almost as mesoscutum. Mesopleuron ( Fig. 39 ) with fine punctures; along posterior margin with transverse wrinkles; median portion smooth, shiny. Upper end of epicnemial carina approximately reaching to 0.4 distance to subalar prominence, distant from front margin of mesopleuron. Metapleuron evenly convex, with fine, almost even punctures. Juxtacoxal carina absent. Submetapleural carina complete, strong. Wings gray-brownish, hyaline. Fore wing with vein 1cu-a opposite 1/M. Areolet quadrangular, with short stalk, receiving vein 2m-cu approximately 0.7 × distance from vein 2rs-m to 3rs-m. 2-Cu approximately 1.5 × as long as 2cu-a. Hind wing vein 1-cu shorter than cu-a. Ratio of length of hind tarsomeres from first to fifth approximately: 11.5:6.0:4.0:2.5:3.0. Claw almost simple. Propodeum ( Fig. 40 ) evenly convex; median longitudinal carinae complete, strong; areae basalis, superomedia and petiolaris completely confluent, slightly rough; remaining areas of propodeum with almost even punctures. Propodeal spiracle elongate-oval.

METASOMA ( Fig. 41 ). First tergite approximately 1.7 × as long as posterior width; median dorsal carinae reaching beyond spiracle; dorsolateral and ventrolateral carinae complete; postpetiole with dense fine punctures; spiracle located slightly anterior of middle. Second tergite 1.1–1.2 × as long as posterior width, anterior half strongly irregularly rugose, posterior half almost smooth, shiny, with distinct punctures. Ovipositor sheath ( Fig. 42 ) approximately 2.5 × as long as wide, knife-shaped, along lower margin with distinct parallel groove.

COLORATION ( Fig. 35 ). Black, except following; apical margin of clypeus, median portion of mandible, maxillary and labial palpi, all reddish brown to darkish brown; fore and middle legs, except coxae and trochanters reddish brown; lateral spots of vertex yellow; tegula, pterostigma and veins blackish brown.

Male

MEASUREMENTS. Body length 11.0–13.0 mm. Fore wing length 8.0–11.0 mm.

COLORATION. Face, clypeus, mandible except teeth and small spots on upper-posterior portion of pronotum yellow; maxillary and labial palpi dark brown; parts of fore and middle coxae, fore and middle trochanters, and tegulae yellowish brown to brown, with remainder of fore and middle legs reddish brown; ventral profiles of hind tibiae, basal portions of hind tarsomeres and apices dark brown.

Hosts

Acantholyda posticalis (Matsumura, 1912) , Cephalcia lariciphila (Wachtl, 1898) .

Host foodplants

Larix principis -rupprechtii Mayr, Pinus tabuliformis Carrière , P. thunbergii Parl.

Differential diagnosis

The new species is similar to C. altitudinis ( Heinrich, 1953) , but can be distinguished from the latter by the following combination of characters: fore wing with vein 1cu-a opposite 1/M; hind wing vein 1-cu shorter than cu-a; second tergite about 1.1 to 1.2 × as long as its maximum width; ovipositor sheath ( Fig. 42 ) with distinct parallel groove along lower margin; hind leg and all tergites black. Ctenopelma altitudinis : fore wing with vein 1cu-a basad of 1/M; hind wing vein 1-cu distinctly longer than cu-a. second tergite about 0.85 to 9.5 × as long as its maximum width; ovipositor sheath without distinct parallel groove along lower margin; at least basal half of hind femur red-brown; median tergites of metasoma red-brown.

Figures

Figs 35–37. Ctenopelma pineatum Sheng, Sun & Li sp. nov., holotype, ♀ (GSFGPM). 35. Habitus, lateral view. 36. Head, anterior view. 37. Head, lateral view.

Figs 38–42. Ctenopelma pineatum Sheng, Sun & Li sp. nov., holotype, ♀ (GSFGPM). 38. Head, dorsal view. 39. Mesosoma, lateral view. 40. Propodeum. 41. Metasoma, dorsal view. 42. Apical portion of metasoma, lateral view.