Rovenosa khalaimi Manukyan, 2021

Manukyan, Andranik R. & Zhindarev, Leonid A., 2021, Fossil Darwin wasps (Hymenoptera: Ichneumonidae) from Baltic amber, Palaeoentomology 4 (6), pp. 637-647 : 642-644

Rovenosa khalaimi Manukyan , sp. nov.

( Figs 4A–C , 5A–E )

Holotype. KAM No. 7468 , ♀. Well preserved complete specimen. Syninclusion: Diptera (fragments of legs).

Paratypes. KAM No. 7514-1, ♂, hind wings behind the areolet and apical flagellomeres ground off; the tarsus of the hind right leg behind the 2nd segment damaged. KAM No. 7514-2a, ♂, KAM No. 7514-2b, ♂, antennae behind the flagellomere 9 and the distal half of the wings ground off.

Etymology. Named after the expert in Ichneumonidae Dr. Andrey I. Khalaim (ZIN; Universidad Autónoma de Tamaulipas, Cd. Victoria, Mexico).

Diagnosis. Rovenosa khalaimi differs from other members of the genus by its upcurved ovipositor and sheath, by having ventral surfaces of middle and hind tibiae sharp spines and antenna with multiparous plate sensillae behind flagellomere 16–17 distinct and long, almost over entire length of each flagellomere.

Type locality and horizon. Baltic amber. Upper Eocene , Prussian Formation. Baltic Sea coast and amber quarry Yantarny near Kaliningrad, Kaliningrad Province, Russia .

Remarks. All three paratypes were originally in one stone. Later they were separated and kept under separate accession numbers— paratypes KAM No. 7514-2a,b in one stone, paratype KAM No. 7514-1—in another.

Description. Female (holotype). Body length about 5.3 mm ( Fig. 4A ), fore wing length 4.0 mm. Temple short, strongly narrowed behind eyes in dorsal view ( Fig. 4B ). Distance from lateral ocellus to eye margin 1.1 times than ocellus diameter. Mandible narrow and slender, their basal width 1.2 times as its apical width; the upper tooth is rounded, the lower tooth is sharp and longer than the upper one. Malar space short, its length is equal to the basal width of the mandibles. Clypeus in lateral view strongly convex, separated from face by distinct impression, without teeth on its ventral margin. Clypeus and face with fine and distinct punctures. Occipital carina most probably complete.Antennae with 29 flagellomeres; basal flagellomeres 1–4 long about 5 times as long as wide; middle flagellomeres 5–17 slightly elongated, about 2 times as long as wide; subapical flagellomeres strongly transversе. Multiparous plate sensilla behind the 16–17 segments distinct and long, almost over the entire length of the segment. Labial palpus 4-segmented, maxillary palpus 5-segmented. Mesonotum narrow, abruptly narrowing toward anterior margin; the surface is matt, with fine granulated sculpture, without punctures; notaulus in 0.4 of the mesoscutum sharp. Prepectal carina present. Sternauli and pospectal carina absent. Mesopleura punctured along mesopleural carina. Metapleural carina complete. Submetapleural carina anteriorly expanded into a broad lobe. Metapleura anteriorly with distinct and sharp punctures, smooth between punctures. Propodeum with well developed carina ( Fig. 4C ); areola elongated, about 2.5 times as long as broad. Area petiolaris deeply impressed, carina distinctly raised above the surface of the propodeum.

Fore wing without areolet ( Fig. 4A ); vein 2m-cu slightly inclivous, bulla in the half of 2m-cu directly below areolet. Pterostigma broad, about 3.3 times as long as wide. Metacarp (2R1) falls short of the apex of fore wing. Vein 4Rs long, about 2.4 times as long as r-rs. Nervulus interstitial and inclivous. Hind coxae and trochanters are enlarged, length of coxae 1.1 mm, about 1.9 times as long as wide, noticeably longer than first metasomal tergite. Length of hind femur 1.7 mm. Length of hind tibia 1.9 mm. Ventral surface of hind and middle tibia with sharp spines ( Fig. 5A, B ). Spurs moderately long and thin, 0.4 times as long as basitarsus. Claws of hind tarsi thin, weakly curved.

Metasoma cylindrical, curved downward ( Fig. 5B ). First metasomal tergite short, weakly convex dorsally in lateral view ( Fig. 4C ); dorsomedian carinae weak reaches barely 0.8 times the length of tergite; spiracle in 0.3 of tergite just below dorsolateral carina. Ovipositor and sheaths distinctly upcurved ( Fig. 5A, B ), ovipositor length more 2.3 mm, distinctly shorter than the hind tibia; sheaths more 2.2 mm.

The body is uniformly dark brown or black, finely shagreened; without pubescent, only clypeus with long and dense pubescence. Face, malar space and scutellum with fine punctures. Propodeum with deep punctures.

Male. Body length about 5.5–5.7 mm ( Fig. 5D ), fore wing length 4.2 mm. The teeth of mandibles sharp, equal in length. Ocelli enlarged, distinctly raised above head surface in lateral view ( Fig. 5C ); lateral ocellus diameter slightly greater than distance from lateral ocellus to eye. Antennae narrowing in the upper half, multiparous plate sensillae on the distal half thin and moderately dense. Labial palpus short, 3-segmented; maxillary palpus elongated, 4-segmented. Mesopleura deeply punctured along mesopleural carina. Spurs moderately 0.4 times as long as basitarsus. Metasoma cylindrical, curved downward.

Figures

FIGURE 4. A, Rovenosa khalaimi sp. nov., habitus. B, Head and mesosoma, right lateral view. С, Propodeum and first metasomal tergite, right lateral view. Scale in mm.

FIGURE 5. Rovenosa khalaimi sp. nov. A and B, Holotype, ovipositor. C, Paratype (KAM 7514-1), head, left lateral view. D, Paratype (KAM 7514-2a), habitus. E, Metasoma. Scale in mm.