Chauvinia ganota Claridge, 2023

Pos, Davide Dal, Claridge, Brandon, Diller, Erich, Noort, Simon Van & Giovanni, Filippo Di, 2023, Still counting: new records, nomenclatural notes, and three new species of Phaeogenini (Hymenoptera, Ichneumonidae, Ichneumoninae) from the Afrotropical region, European Journal of Taxonomy 868, pp. 1-71 : 26-31

Chauvinia ganota Claridge sp. nov.

urn:lsid:zoobank.org:act:E12B92E3-4C41-4E8E-9F21-96E087EE9F8E

Figs 10–11 , 12A–B , 13A , 14

Differential diagnosis

Chauvinia ganota sp. nov. can be distinguished from the other species of Chauvinia by the following combination of characters: (1) second tergite approximately 3× as long as apically wide (approximately 2 × in C. nitida and C. nyanga ) ( Fig. 10C ); (2) female predominantly brownish-orange, with dorsal margin of pronotum predominantly yellowish-white (female predominantly black in C. nyanga , dorsal margin of pronotum orange to yellowish-orange and concolorous in C. nitida and C. pelecinoides ) ( Figs 10B , 11A ); (3) female antenna with incomplete yellowish-white annulus from 9 th to the 11 th flagellomeres (annulus starting at the 7 th /8 th flagellomeres in C. nitida and C. pelecinoides ) ( Fig. 10B ); (4) male overall lighter in colour than males of C. nyanga and with mesopleuron predominantly yellowish-white (mesopleuron predominantly black in C. nyanga ) ( Fig. 13A ); (5) male face with less distinct and less impressed punctures (more distinct and deeply impressed in C. nyanga ) ( Fig. 12A ).

Etymology

From the Greek ‘ ganotos ’ meaning ‘polished’ or ‘brightened’ as this species is overall lighter in colour compared to the species to which it is most similar, Chauvinia nyanga Rousse & van Noort, 2013 .

Type material

Holotype

KENYA • ♀ “[Offwhite label] Karen , Nairobi, Kenya / Sept. 1972 2000± m./ C’ngham-vanSomeren”; EMUS ENT00006497 .

Female, in very good condition.

Paratypes

KENYA • 1 ♀, 5 ♂♂; same collection data as for holotype; Aug. 1972; B. Claridge des.; EMUS ; • 16 ♀♀, 11 ♂♂; same collection data as for holotype; Sep. 1972; EMUS • 4 ♀♀, 10 ♂♂; same collection data as for holotype; Oct. 1972; EMUS • 1 ♀, 10 ♂♂; same collection data as for holotype; Nov. 1972; EMUS • 1 ♀, 5 ♂♂; same collection data as for holotype; Dec. 1972; EMUS • 1 ♀; same collection data as for holotype; Mar. 1973; EMUS • 2 ♂♂; same collection data as for holotype; Sep. 1971; 6000 ft a.s.l.; EMUS • 1 ♂; near Nairobi ; Jan. to Mar. 1972; 6000 ft a.s.l.; C. van Someren leg.; B. Claridge des.; EMUS .

Description

Female

MEASUREMENTS. Body length: 7.5 mm; fore wing length: 4.3 mm.

HEAD ( Figs 11A , 12A ). Subquadrate in frontal view (slightly higher than wide), overall shining; face transverse, more than 3× as wide as medially high, very finely, sparsely punctate with punctation denser laterally, medio-apically protruding in a very distinct blunt tubercule immediately ventral to antennal sockets, median field present, weakly convex, and delimited by indistinct carinae on the ventral part of the face; antennal socket slightly projecting into a small flange; dorsal tentorial arm pit distant from antennal sockets by less than 2× the diameter of the pit; frons and vertex almost completely smooth, with extremely sparse and superficial punctuation; ocellar triangle indistinct; occipital carina distinct and complete, meeting hypostomal carina before the base of the mandible; temples slightly rounded in dorsal view; gena, in lateral view, weakly inflated and nearly impunctate except for a few scattered, fine, superficial punctures; clypeus moderately convex, shining, and nearly impunctate except for a few scattered, fine, superficial punctures, particularly near ventral and dorsal margins; malar space short, about 0.6× basal width of mandible; mandible with sparse setiferous punctures in the central area, teeth rather stout with the ventral tooth shorter (about 0.7 ×) than the upper tooth; antenna subclavate with apical flagellomeres short and wide; flagellum with 23 flagellomeres, the 2 nd flagellomere about 0.8× length of 1 st, preapical flagellomeres slightly wider than long.

MESOSOMA ( Fig. 11A–B ). Overall shining; pronotum smooth and impunctate; epomia small but well-developed; propleuron finely punctate, with sparse hairs, projected into a blunt flange ventro-apically; mesoscutum smooth and impunctate except for a few scattered, fine, superficial punctures, notauli obsolete; scutellum flat and impunctate, carinated only at the base; mesopleuron smooth and impunctate except for a few scattered, fine, superficial punctures, speculum smooth; epicnemial carina slightly raised between fore coxae, laterally ending at anterior edge of mesopleuron; sternaulus distinct on anterior fourth; posterior transverse carina of mesosternum widely obsolete in front of mid coxae; metapleuron smooth and impunctate, juxtacoxal carina strong; propodeum long in lateral view, gently sloping posteriorly; propodeal carinae well-developed except for the posterior transverse carinae obsolete between median longitudinal carinae and subobsolete between median and lateral longitudinal carinae; propodeum overall smooth and sparsely punctate laterally, medially with confluent area consisting of area petiolaris, and area superomedia transversely rugulose, becoming coarser and denser posteriorly.

LEGS ( Fig. 10B ). All coxae finely, densely punctate; hind coxa without tooth-like projection or carina. Hind femur about 3.1–3.2 × as long as medially high. Tarsal claws without pecten.

WINGS ( Fig. 10B ). Fore wing with 3rs-m present, areolet pentagonal; 1cu-a opposite M&RS, CU between 1m-cu&M and 2cu-a about 2.7 × as long as 2cu-a. Hind wing with distal abscissa of CU absent.

METASOMA ( Fig. 10C ). Tergites smooth and impuctate; gastrocoeli and thyridia obsolete; 2 nd tergite approximately 3× as long as apically wide; ovipositor straight, slightly projecting.

COLORATION ( Figs 10B , 12A ). Head with face, clypeus, mandibles (except for black mandibular apex) pale yellow; inner eye orbit and postero-dorsal section of eye orbit yellow; remainder of head light brownish-orange ventrally and brownish-orange dorsally. Antenna with scape brownish-yellow ventrally, becoming dark orange-brown dorsally; pedicel brown; flagellum dark brown, becoming darker apically, except for 9 th to 11 th flagellomeres yellowish-white medio-dorsally. Mesosoma with pronotum light brownish-orange except for posterior 0.7 of dorsal margin yellowish-white; prosternum brownish-yellow; mesonotum brown medially and dark brown laterally and medially at anterior margin; scutellum orange-brown; mesopleuron light brownish-orange except for longitudinal yellowish-white area immediately dorsal to sternaulus; propodeum brownish-orange except for anteriorly dark brownish. Fore and mid legs with coxae, trochanters and trochantelli yellowish-white; femora light brownish-orange; tibiae light brownish-orange ventrally and dark orange-brown dorsally; tarsi dark orange-brown except for 4 th –5 th tarsomeres dark brown. Hind leg with coxa light brownish-orange ventrally and brown dorsally; tarsus dark brown except for 1 st –3 rd tarsomeres orange-brown basally. Metasoma brownish-orange with anterior and posterior areas of 1 st –4 th tergites lighter and 6 th –7 th tergites dark orange-brown; ovipositor sheath dark reddish-brown.

VARIATION (based on the 24 paratypes). Posterior transverse carina between median longitudinal carinae varying from obsolete (20 specimens) to subobsolete (1 specimen) such that area superomedia partially distinct; incomplete white banding on flagellum ranging from 8 th /9 th to 10 th /11 th flagellomeres.

Male ( Figs 12B , 13B )

As in female, except for: head transverse, slightly wider than high; face finely, sparsely punctate; 2 nd –7 th tergites densely, finely punctate with punctae becoming progressively finer and sparser at posterior tergites; metasoma shorter than in female. Coloration: head with face, clypeus, mandibles (except for black mandibular apex), ventral 0.3 of gena, inner eye orbits, postero-dorsal section of eye orbit yellowish-white, remainder of head varying from brown to black. Antenna with scape yellowish-white ventrally and remainder dark brown; scape and flagellum dark brown. Mesosoma with pronotum varying from brown to dark brown except for entirety of ventral margin and 0.7–0.8 of dorsal margin yellowish-white; prosternum yellowish-white; mesonotum varying from entirely black to black with irregular brown submedial longitudinal areas; scutellum predominantly yellowish-white with variable light to dark brown area medially; mesopleuron with large yellowish-white area approximately spanning area ventral to speculum and dorsal to sternaulus except for small light to dark brown area at anterior margin along sternaulus, remainder varying from brownish-orange to dark brown, propodeum usually entirely dark brown to black, occasionally lighter and with small yellowish to yellowish-white mark immediately lateral to propodeal apophyses. Fore and mid legs with coxae, trochanters and trochantelli yellowish-white; tarsi light yellowish-brown except for 5 th tarsomere dark brown. Hind leg with coxa having large yellowish to dark brown spot on basal and ventral area, remainder yellowish-white; trochanter dark brown except yellowish-white apex; trochantellus yellowish-white; femur brown to dark brown except for basal 0.2 light brownish dorsally; tibia brown to dark brown dorsally and brown ventrally except for basal 0.2 dark brown to black; tarsus dark brown except 1 st tarsomere lighter ventrally. Metasoma with 1 st tergite dark brown; 2 nd –7 th tergites brown to dark brown with extreme apical margins yellowish-white.

Host

Unknown.

Distribution

Kenya ( Fig. 14A–B ).

Figures

Fig. 10. Chauvinia ganota Claridge sp. nov., holotype, ♀ (EMUS). A. Labels. B. Habitus, lateral view. C. Metasoma, dorsal view.

Fig. 11. Chauvinia ganota Claridge sp. nov., holotype, ♀ (EMUS). A. Mesopleuron, lateral view. B. Mesosoma, dorso-lateral view.

Fig. 12. Head, frontal view. A–B. Chauvinia ganota Claridge sp. nov. A. ♀, holotype (EMUS). B. ♂, paratype (EMUS). – C–D. Chauvinia nyanga Rousse & van Noort, 2013. C. ♀ (EMUS). D. ♂ (EMUS).

Fig. 13. Habitus, lateral view, ♂. A. Chauvinia ganota Claridge sp. nov., paratype (EMUS). B. Chauvinia nyanga Rousse & van Noort, 2013 (EMUS).

Fig. 14. Distribution of Chauvinia ganota Claridge sp. nov. A. Type locality. B. Country record.