Ctenopelma lii 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 : 8-12

Ctenopelma lii Sheng, Sun & Li sp. nov.

urn:lsid:zoobank.org:act:31291D0C-7348-4AFD-83DE-71654DA13CB2

Figs 12–23

Diagnosis

Median portion of vertex behind lateral ocelli abruptly steep. Areolet with long stalk. Propodeum ( Fig. 19 ) smooth, shiny, with sparse brown setae; combined areae of area basalis and area petiolaris 2.2 × as long as apical width, slightly narrowed medially. Ovipositor sheath ( Fig. 22 ) 3.6 × as long as its maximum width. Hind coxae, trochanters and femora entirely black.

Etymology

The new species is named after Tao Li, who collected the type specimen.

Material examined

Holotype

CHINA • ♀; Liaoning Province, Kuandian ; 27 Jun. 2016; Tao Li leg.; GSFGPM.

Description

Female

MEASUREMENTS. Body length approximately 8.5 mm. Fore wing length approximately 7.5 mm. Ovipositor sheath length approximately 0.9 mm.

HEAD. Face ( Fig. 13 ) approximately 1.4 × as wide as long, slightly convex medially, with dense fine punctures and sparse short brown setae; between antennal socket and inner margin of eye with distinct longitudinal groove. Clypeal suture distinct. Clypeus approximately 2.6 × as wide as long, almost smooth, shiny, with sparse brown setae; median portion transversely concave; with dense, transverse wrinkles; subapical margin ridge-shape convex; median portion of apical margin almost truncate, sublateral blunted angular. Mandible strong, with brown setae; lower tooth slightly shorter than upper tooth. Malar space at most 0.2 × as long as basal width of mandible. Gena ( Fig. 14 ) smooth, shiny, with sparse brown setae, upper portion convergent backwardly. Vertex ( Fig. 15 ) and frons with texture as that of gena. Median portion of vertex behind lateral ocelli abruptly steep ventrally. Postocellar line approximately 0.8 × as long as ocular-ocellar line. Antenna with 33 flagellomeres; ratio of length from first to fifth flagellomeres approximately: 2.4:1.6:1.5:1.4:1.3. Occipital carina complete, lower end reaching to base of mandible.

MESOSOMA. Pronotum almost smooth, shiny, upper-posterior portion with indistinct, sparse, fine punctures. Epomia weak and short. Mesoscutum and scutellum ( Fig. 16 ) with sparse, fine punctures and brown setae. Anterior portion of notaulus present. Scutoscutellar groove smooth, shiny. Postscutellum with denser punctures than scutellum. Mesopleuron ( Fig. 17 ) smooth, shiny; upper and lower portions with sparse fine punctures and long brown setae. Epicnemial carina thin, upper end approximately reaching to 0.7 distance to subalar prominence. Metapleuron shiny, slightly convex, with sparse fine punctures and long brown setae. Juxtacoxal carina absent. Wings slightly brownish, hyaline. Fore wing with vein 1cu-a distal to 1/M approximately by 0.4 × length of 1cu-a. Areolet ( Fig. 18 ) almost triangular, its stalk approximately 0.4 × as long as 2rs-m, receiving vein 2m-cu approximately 0.75 × distance from vein 2rs-m to 3rs-m. 2-Cu approximately 1.5 × as long as 2cu-a. Hind wing vein 1-cu approximately 1.5 × as long as cu-a. Ratio of length of hind tarsomeres from first to fifth approximately: 5.2:2.6:2.0:1.3:1.5. Claw finely pectinate. Propodeum ( Fig. 19 ) evenly convex, smooth, shiny, with sparse brown setae; area petiolaris with indistinct fine wrinkles; anterior transverse carina and basal portion of lateral longitudinal carina absent. Area basalis and area superomedia combined. Propodeal spiracle oval, distance to lateral longitudinal carina longer than to pleural carina.

METASOMA ( Figs 20–22 ). Tergites almost smooth, shiny, with sparse fine punctures and brown setae. First tergite 2.5 × as long as apical width, with large basal median concavity; median dorsal carinae almost entirely absent; dorsolateral carina from spiracle to anterior margin complete; ventrolateral carina complete. Spiracle circular, small, located approximately at posterior 0.4 of first tergite. Second tergite approximately as long as its posterior width. Fourth tergite as long as wide, lateral sides approximately parallel. Ovipositor sheath ( Fig. 22 ) 3.6 × as long as its maximum width. Ovipositor ( Fig. 23 ) with distinct subapical dorsal notch.

COLORATION ( Fig. 12 ). Black, except for following: antenna reddish brown, apical portion brownish black; face except upper lateral longitudinal spots and upper median small spot brownish black; clypeus except most apical median portion brown; mandible except teeth, malar area, upper-anterior portion of gena, part of tegula irregularly, posterior portion of scutellum, postscutellum, apical portions of fore and middle femora, fore and middle tibiae, all yellow; maxillary and labial palpi, upper-posterior corner of pronotum, ventral profile of fore coxa, basal portions of fore and middle femora and hind tibia, basal ends of hind tarsomeres and tergites 2 to 8 reddish brown. Ovipositor sheath brownish black.

Differential diagnosis

The new species is similar to C. melanothoracicum Sheng, 2009 , but can be distinguished from the latter by the following combinations of characters: median portion of vertex behind lateral ocelli abruptly steep ventrally; first tergite 2.5 × as long as apical width; all coxae, hind trochanter and femur black. Ctenopelma melanothoracicum : median portion of vertex behind lateral ocelli evenly convergent ventrally; first tergite 2.1 × as long as apical width; all coxae, hind trochanter and femur red-brown.

Figures

Figs 12–15. Ctenopelma lii Sheng, Sun & Li sp. nov., holotype, ♀ (GSFGPM). 12. Habitus, lateral view. 13. Head, anterior view. 14. Head, lateral view. 15. Head, dorsal view.

Figs 16–20. Ctenopelma lii Sheng, Sun & Li sp. nov., holotype, ♀ (GSFGPM). 16. Mesoscutum and scutellum. 17. Mesosoma, lateral view. 18. Areolet. 19. Propodeum. 20. Metasoma, lateral view.

Figs 21–23. Ctenopelma lii Sheng, Sun & Li sp. nov., holotype, ♀ (GSFGPM). 21. Tergites 1–2, lateral view. 22. Apical portion of metasoma, lateral view. 23. Ovipositor, lateral view.