Centeterichneumon nambi Dal Pos, Diller & Di Giovanni, 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 : 20-24

Centeterichneumon nambi Dal Pos, Diller & Di Giovanni sp. nov.

urn:lsid:zoobank.org:act:AE3B3565-23DE-4F0B-B35F-23B7C50B2969

Figs 7–9

Differential diagnosis

Centeterichneumon nambi sp. nov. can easily be distinguished from the other known species, C. denticoxatus , by the following combination of characters: (1) area superomedia not separated from area basalis, thus forming a single long area (separated and heart-shaped in C. denticoxatus ) ( Fig. 7B ); (2) mesoscutum flat in lateral view (convex in C. denticoxatus ) ( Fig. 7A, C ); (3) clypeus and face pale yellow, frons orange-brown (clypeus, face and frons pale white in C. denticoxatus ) ( Fig. 8A ); (4) metasoma entirely orange except for the 7 th tergite, which is dorsally brown with a white apical margin (mostly black with white posterior bands on apical tergites in C. denticoxatus ) ( Fig. 7A ); (5) 2 nd and 3 rd metasomal tergites densely but superficially punctate (shagreen with sparse punctuation in C. denticoxatus ) ( Fig. 7B ).

Etymology

Named after the goddess Nambi, daughter of the sky god Gulu; she married Kintu, the first king of Uganda in the Baganda mythology ( Lynch & Roberts 2010). Noun in apposition.

Type material

Holotype

UGANDA • ♀; “[White label] UGANDA – Kibale N. P. / Kanyawara Bio. Station / 00°33’54,4’’N – 30°21’29,8’’E / 28.III-04.IV.2010 / 1509 m – Malaise trap / S. Katusabe & Co. Leg. ”; ZSM.

Female, in very good condition, missing only the 2–5 tarsomeres and claws on the right hind leg.

Paratype

UGANDA • 1 ♀; same collection data as for holotype; DDPC 0000034 • 1 ♀; same collection data as for holotype; TUZ .

Description

Female (holotype)

MEASUREMENTS. Body length: 8.1 mm; fore wing length: 5.4 mm.

HEAD ( Figs 7C , 8A ). Strongly transverse in dorsal and frontal view, overall shining; face distinctly transverse, more than 3.5× as wide as medially high, densely punctate, medio-apically protruding in a very distinct blunt tubercule right below the antennal sockets, median field present and delimited by carinae on the ventral part of the face; clypeus well separated from the rest of the face (epistomal sulcus distinct); clypeus sparsely punctuate, shining and lenticular; malar space short, about 0.3 × basal width of mandible; mandible departing from the horizontal plane, slightly bending downward, with sparse setiferous punctures in the central area and on the ventral margin, teeth rather stout with the ventral tooth shorter (about 0.5 ×) than the upper tooth and slightly bent downward; antennal socket slightly projecting into a small flange, connected laterally to the internal orbit by means of a blunt, almost indistinct carina; frons and vertex almost completely smooth, with sparse and superficial punctuation, and with short and sparse hairs; ocellar triangle wider than high, slightly elevated; occipital carina distinct and complete, meeting hypostomal carina at the base of the mandible; temples slightly rounded in dorsal view; gena, in lateral view, medially strongly inflated, with indistinct punctures; antenna filiform, not tapering, flagellum with 28 flagellomeres, the 2 nd flagellomere about 1.5× as long as 1 st, preapical flagellomeres slightly longer than wide.

MESOSOMA ( Fig. 7A–C ). Dorsoventrally flattened, overall shining; pronotum irregularly striate on ventral margin, smooth centrally, and densely punctate dorsally, its ventral corner pointed; pronotal neck aciculate; pronotal collar centrally smooth and from densely to irregularly punctate on the side; epomia strong; propleuron finely punctate, with sparse hairs, projected into a blunt flange ventro-apically; mesoscutum finely and moderately punctate, notauli short and distinct only anteriorly; scutellum flat, with only a few, very superficial punctures, carinated only at the base; mesopleuron from densely punctate to puncto-striate, speculum smooth; epicnemial carina slightly raised between fore coxae, laterally ending at anterior edge of mesopleuron; sternaulus distinct on anterior third, crenulate; posterior transverse carina of mesosternum complete, slightly raised between mid coxae; metapleuron punctate anteriorly and punctate-rugose apically and ventrally, juxtacoxal carina strong; propodeum rather long in lateral view, not gently sloping; anterior transverse carina absent, with area basalis and area superomedia not separated and transversely striated, area externa and area dentipara not separated, punctate basally, and transversely striated apically; area petiolaris and area postero-externa transversely striated; area spiracularis moderately punctate; area lateralis transversely striated.

LEGS ( Figs 7A , 8B ). All coxae densely punctate; hind coxa with a short ventral oblique carina. Hind femur about 3.8–3.9 × as long as medially high. Tarsal claws without pecten.

WINGS ( Fig. 7A ). Fore wing with 3rs-m present, areolet pentagonal; 1cu-a opposite M&RS, CU between 1m-cu&M and 2cu-a about 1.8× as long as 2cu-a. Hind wing with distal abscissa of CU present, pigmented, CU about 1.9× as long as cu-a.

METASOMA ( Fig. 7A–B ). First tergite sparsely punctate basally, apically (the postpetiole) shagreen; 2 nd tergite superficially and densely punctate, gastrocoeli and thyridia superficial; 3 rd tergite superficially and densely punctate; the rest of the tergites shagreen; ovipositor straight, slightly projecting.

COLORATION ( Figs 7A–C , 8A ). Head with face, clypeus, mandibles (except the black apical teeth), orbits all around the eyes, and genae pale yellow; black are: mandibular teeth, ocellar triangle, vertex, and temples; central part of the frons and the lower part of the temples orange-brown. Antenna with scape and pedicel entirely orange; flagellum with the first three basal segments orange-brown, the 4 th gradually infuscating, and the rest black with the exception of the brown ventral side of the apical segments (from the 12 th /13 th flagellomeres); white annulus present only on the dorsal side of the flagellum, from the 8 th to 14 th /15 th flagellomeres. Mesosoma entirely orange-yellow with preaxilla black and tegulae pale yellow, the overall ventral side is pale yellow while the dorsal sclerites are mostly orange. All legs are orange yellow, with fore and mid coxae and fore and mid trochanters pale yellow; basal part of hind femur, hind tibia, and hind tarsus infuscate. Wing entirely hyaline. Metasoma entirely orange, except for the 7 th tergite, which is dorsally brown with a white apical margin; ovipositor sheath deeply infuscate.

VARIATION (based on the two paratypes). White annulus on the flagellum starting from the 7 th flagellar segment in one paratype; mesoscutal suprahumeral sulcus black in both paratypes.

Male

Unknown.

Host

Unknown.

Distribution

Uganda ( Fig. 9A–B ).

Figures

Fig. 7. Centeterichneumon nambi Dal Pos, Diller & Di Giovanni sp. nov. A. Habitus, lateral view, holotype, ♀ (ZSM). B. Propodeum and metasoma, dorsal view, holotype, ♀ (ZSM). C. Mesopleuron, lateral view, paratype, ♀ (DDPC).

Fig. 8. Centeterichneumon nambi Dal Pos, Diller & Di Giovanni sp. nov.A. Head, frontal view, holotype, ♀ (ZSM). B. Coxa, lateral view, paratype, ♀ (DDPC); black arrow indicates the short ventral oblique carina.

Fig. 9. Distribution of Centeterichneumon nambi Dal Pos, Diller & Di Giovanni sp. nov. A. Type locality. B. Country record.