Chartocerus sumatrensis Schmidt & Polaszek

Schmidt, Stefan, Hamid, Hasmiandy, Ubaidillah, Rosichon, Ward, Samantha & Polaszek, Andrew, 2019, A review of the Indonesian species of the family Signiphoridae (Hymenoptera, Chalcidoidea), with description of three new species, ZooKeys 897, pp. 29-47 : 29

Chartocerus sumatrensis Schmidt & Polaszek sp. nov. Fig. 4 A–F

Material examined.

Holotype. Indonesia • ♀ (on slide); West Sumatra, Padang, Universitas Andalas campus; 0.9043S, 100.4802E; 500 m a.s.l.; 17-Jun-2012; S. Schmidt leg.; screen-sweep net; MZB; specimens ID: BC- ZSM-HYM-05406-H10.

Diagnosis.

Head and body dark brown ( Fig. 4A, B ), fore wing basally with brown infuscation ( Fig. 4E ). Antenna (in female) with 4 anelli ( Fig. 4H ). Clava elongate, about 6 times as long as broad and 1.5 times as long as scape length ( Fig. 4G ). Fore wing 2.9 times as long as broad, anteriorly with 4 setae, posterior margin of hind wing disc slightly rounded.

Description (female holotype).

Colour. Head dark brown ( Fig. 4A, B ), legs brown with tarsi pale yellow ( Fig. 4C ), antenna brown with radicle and basal 3 funicle antennomeres pale yellow ( Fig. 4G ). Fore wing basally with brown infuscation, and a darker patch behind distal part of submarginal vein and proximal part of marginal vein, and longitudinal dark patch along basal part of hind margin ( Fig. 4E ).

Morphology. Head 1.69 times as broad as frontovertex width ( Fig. 4B ), frontovertex width subequal to length of clava, distance from mouth margin to facial ridge 0.66. Antenna with 4 anelli, increasing in size towards apex ( Fig. 4H ), clava about 6 times as long as broad and 1.5 times as long as scape length, pedicel about 0.5 times as long as scape ( Fig. 4G ). Midlobe of mesoscutum with 11 setae in posterior half, scutellum with 8 setae along posterior margin. Fore wing 2.9 times as long as broad ( Fig. 4E ), longest setae of marginal fringe 0.38 times as long as width of disc, seta M1 absent, M2b present ( Fig. 4E ). Hind margin of hind wing disc slightly rounded and nearly parallel to anterior margin ( Fig. 4F ). Mesofemur ventrally with 3 long spines ( Fig. 4D ). Midtibial spur 0.7 times as long as corresponding basitarsus ( Fig. 4C ), the latter 0.53 times as long as midtibia. Ovipositor 2.9 times as long as midtibia and 2.0 times as long as hind tibia.

Host.

Unknown.

Distribution.

Only known from the type locality near Padang in West Sumatra.

Etymology.

The species is named after the island of Sumatra.

DNA barcode data.

A single, full-length barcode sequence of the species is separated from its nearest neighbour species, C. javensis sp. nov., by 12.2% (Suppl. material 1, Genbank Accession Number: MH407238).

Remarks.

The species is similar to Chartocerus kerrichi and C. javensis sp. nov., but can be distinguished from the former by the longer ovipositor (2.9 times as long as midtibia, compared to 2 times in kerrichi ) and the more slender clava (about 6 times as long as broad, compared to 4.5 times in kerrichi ). From C. javensis sp. nov. it can be separated by the longer ovipositor (2.9 times as long as midtibia, compared to less than 2 times in javensis ) and the shorter midtibial spur (0.7 times as long as corresponding basitarsus, compared to subequal in javensis ).

Figures

Figure 4. Chartocerus sumatrensis Schmidt & Polaszek, sp. nov., female holotype A body in dorsal view B head in frontal view C middle leg D apex of middle femur E fore wing F hind wing G antenna H pedicel and flagellum base.