Diaparsis ( Diaparsis ) storozhenkoi Khalaim, 2025

Khalaim, Andrey I., 2025, First record of the subfamily Tersilochinae (Hymenoptera: Ichneumonidae) from New Caledonia, Zootaxa 5715 (1), pp. 194-198 : 195-197

Diaparsis ( Diaparsis) storozhenkoi Khalaim , sp. nov.

( Figs 1–9 )

Material examined. Holotype —female ( MNHN) NEW CALEDONIA, “ Nouvelle-Calédonie. Prov. Nord [ North Prov. ], Bopop [ Bopope ], Katalupaik, S20.83342, E165.00676, 808m, 14.x.-29.x.2017, Malaise KAT8-MAL3A, leg. Poirier, NC-TR22418”, “Museum Paris / Expédition La Planète / Revisitée Nlle Calédonie / Prov. Nord-MNHN- PNI Nº60912-2001-201/JJC”.

Paratypes. NEW CALEDONIA. Nord Prov.: 4 ♀ ( 3 ♀ in MNHN, 1 ♀ in ZISP) Gohapin, Aoupinié , 893– 917 m, Malaise trap, 11–26.x.2017, leg. E. Poirier. Sud Prov.: 1 ♀ ( MNHN) “ PR16NC00721 ”, Yaté, Quinné, S21.99830, E166.62540, 173 m, 15.xi–2.xii.2016, leg. E. Poirier.

Description. Female. Body length 6.3 mm. Fore wing length 4.2 mm.

Head, in dorsal view, weakly rounded, strongly constricted posterior to eyes; gena 0.4× as long as eye width ( Fig. 3 ). Eyes glabrous ( Figs 2, 3 ). Clypeus 3.0× as broad as long, in front view lenticular, separated from face by distinct furrow; clypeus smooth, with sparse punctures in upper part ( Fig. 2 ). Mandible moderately robust, upper tooth much longer than the lower. Malar space about half as long as basal mandibular width ( Fig. 1 ). Antennal flagellum slender, filiform, with 18–19 flagellomeres ( 18 in holotype); subbasal flagellomeres about 1.8× and subapical flagellomeres 1.3–1.4× as long as broad ( Fig. 4 ); flagellomeres 4 to 6 with small subapical finger-shaped structures on outer surface ( Fig. 4 , arrows). Face with weak median prominence ( Fig. 2 ). Face, frons and vertex granulate, dull, with fine punctures ( Figs 2, 3 ). Gena shallowly granulate to nearly smooth, dull to weakly shining, with fine punctures. Occipital carina complete ( Fig. 3 ).

Mesoscutum granulate, dull, with fine but distinct punctures ( Fig. 3 ). Notaulus with strong wrinkle on anterolateral side of mesoscutum ( Fig. 3 ). Scutellum with lateral longitudinal carinae present at its anterior part ( Fig. 3 ). Mesopleuron shallowly granulate, nearly smooth centrally above foveate groove, with fine punctures ( Fig. 8 ). Epicnemial carina with upper end distinctly curved to reach front margin of mesopleuron ( Fig. 8 ). Foveate groove of mesopleuron deep, broad, strongly curved, extending in anterior half of mesopleuron, not reaching front margin of mesopleuron, with strong transverse wrinkles ( Fig. 8 ). Propodeal spiracle separated from pleural carina by about 1.5× diameter of spiracle ( Fig. 8 ). Propodeum ( Fig. 6 ) finely and shallowly granulate, with fine (sometimes indistinct) punctures; basal keel distinct, about 0.3× as long as apical area; apical area flat, more or less pointed anteriorly; apical longitudinal carinae mostly absent or indistinct, present only in extreme posterior end of propodeum.

Fore wing ( Fig. 1 ) with vein 2 m-cu distinctly postfurcal, weakly pigmented in anterior 0.4. Vein 2 rs-m thickened, about as long as abscissa of M between 2 rs-m and 2 m-cu. First abscissa of radius (2 r & RS) straight, much longer than width of pterostigma. First and second abscissae of radius (2 r & RS and RS) meeting at slightly acute angle. Metacarpus ( RA) almost reaching apex of fore wing. Hind wing with nervellus reclivous. Legs slender; tarsal claws slender, not pectinate ( Fig. 5 ).

First tergite smooth and slender, about 4.2× as long as posteriorly broad, in cross-section centrally round ( Fig. 8 ); postpetiole weakly widened in dorsal view (9). Glymma absent. Second tergite about 1.7× as long as anteriorly broad ( Fig. 9 ). Thyridial depression about twice as long as broad ( Fig. 9 ). Ovipositor slender, weakly and evenly bent upwards ( Fig. 1 ), with two weak dorsal subapical teeth ( Fig. 7 ); sheath about 2.2× as long as first tergite ( Fig. 1 ).

Head predominantly black. Clypeus yellow to brownish yellow with extreme upper margin blackish ( Fig. 2 ). Mandible yellow, teeth reddish black. Mouthparts yellow. Antenna ( Fig. 4 ) with scape and pedicel yellow ventrally and brownish dorsally; flagellum black, basal flagellomeres sometimes slightly brownish or yellowish. Mesosoma predominantly black; propleuron and lower part of pronotum brownish yellow, median part of pronotum reddish brown; mesopleuron extensively red or brownish red ( Fig. 8 ). Tegula yellow. Pterostigma brownish black ( Fig. 1 ). Legs predominantly brownish yellow; fore and mid coxae and trochanters whitish; hind femur darkened with brown centrally; tibiae and tarsi fuscous ( Fig. 5 ). First metasomal tergite yellow in anterior 0.6–0.7 and brownish black or black in posterior 0.3–0.4 ( Fig. 8 ); tergites 2 and 3 dark brown with posterior margin brownish yellow ( Fig. 9 ); tergites 4 and 5 brownish dorsally and laterally, posteriorly brownish yellow; posterior part of metasoma predominantly brownish yellow ( Fig. 1 ).

Male. Unknown.

Comparison. The new species may easily be recognized from its Oriental and Australasian congeners by the notable colour pattern of the body, i.e. black mesosoma with extensively red-marked mesopleuron ( Fig. 8 ) and first metasomal tergite white in anterior 0.6–0.7 and black in posterior 0.3–0.4 ( Fig. 8 ); all remainder Australasian Diaparsis species possess mesosoma and first metasomal segment black and dark brown (see the partial key below). Such color pattern of the first metasomal segment is rare in the subfamily, e.g. within the genus similar color pattern of the first tergite is known in the Afrotropical species D. mostovskii Khalaim ( Khalaim, 2013).

Etymology. The species is named in honor of the Russian entomologist Sergey Yu. Storozhenko (Vladivostok, Russia).

Distribution. New Caledonia. First record of Tersilochinae .

Figures

FIGURES 1–7. Diaparsis storozhenkoi Khalaim, sp. nov., holotype (1, 2, 4, 6, 7) and paratype (3, 5), ♀; 1—habitus (without right antenna and distal parts of legs), lateral; 2—head, front; 3—head and anterior part of mesosoma, dorsal; 4—head with antennae, front; 5—hind leg, front; 6—propodeum, dorsal; 7—apex of ovipositor, lateral.

FIGURES 8–9. Diaparsis storozhenkoi Khalaim, sp. nov., holotype (8) and paratype (9), ♀; 8—head, mesosoma and base of metasoma, lateral; 9—postpetiole and second tergite, dorsal.