Lathrolestes fiedleri Reshchikov

Reshchikov, Alexey, 2015, A new species of Lathrolestes Foerster (Hymenoptera: Ichneumonidae) from Peruvian Amazonia, Biodiversity Data Journal 3, pp. 4327-4327 : 4327

Lathrolestes fiedleri Reshchikov sp. n.

Materials

Type status: Holotype. Occurrence: recordedBy: B. Medina; sex: female; Location: higherGeography: South America; country: Peru; stateProvince: Ucayali; county: Coronel Portillo; municipality: Callería District; verbatimElevation: 268m; verbatimLatitude: 08°17'34.5''S; verbatimLongitude: 73°40'52.9''W; Event: eventDate: 25.x.2012; Record Level: institutionCode: MUZM

Description

Body length 7 mm. Antenna with 20 flagellomeres. Scape 1.3 times as long as wide. Head narrowed behind compound eyes (Fig. 1a), matt, not punctate, shagrined. Maximum length of gena 0.63X transverse eye diameter; minimum length of gena 0.4X transverse eye diameter. Width of face equal to height of eye (Fig. 1b). In lateral profile face slightly convex, with bulge, lateral parts at inner eye margin with slight impression. Interspace between hind half of lateral ocellus and eye and vertex matt or dimly shining, 1.6X transverse ocellus diameter (Fig. 1a). Clypeus rather long, 0.5 times as long as medially wide, separated from face by deep impression (Fig. 1b). Tentorial pit not large, roundish. Malar space 1.2X basal mandible width. Mandible teeth equal. Occipital carina medially complete.

Mesosoma smooth, polished, without punctures. Notaulus not impressed. Epicnemial carina moderately high, reaching half of mesopleuron height. Hind tibia compressed. Claws elongate, not pectinate. Hind tarsus as long as hind tibia. Vein 3rs-m vestigial. Fore wing with cu-a strongly postfurcal. Propodeal carinae complete, strongly raised; area superomedia half as long as wide, anterior part (before costula) of area apicalis slightly longer than posterior part (Fig. 1c).

Metasoma compressed apically, polished, sparsely pubescent. First metasomal tergite as long as apically wide; without shallow median longitudinal impression and lateromedian longitudinal carinae, slightly curved at spiracles; with slightly enlarged epipleurae (Fig. 1d). Second metasomal tergite transverse. Subgenital plate slightly notched at apical margin. Ovipositor straight, thin, stout at base, slightly up-curved, approximately as long as metasomal height, without notch.

Coloration. Female. Body mostly reddish (Fig. 2), excluding propodeum (Fig. 1c) and basal part of first metasomal tergite (Fig. 1d) pale yellowish and upper part of head (Fig. 1a), antennae, wing costae and pterostigma, hind trochanters, hind tibia and tarsus, upper part of three posterior metasomal tergites, and ovipositor sheath black (Figs 1, 2). Wings slightly infuscate.

Diagnosis

This species differs from other species of the genus by the combination of the following character states: elongate clypeus, 0.5 times as long as medially wide, separated from face by deep groove (Fig. 1b) (in other members of the genus clypeus shorter, 0.2-0.4 times as long as medially wide, except L. gauldi Reshchikov et al, 2012 and L. protenus Barron, 1994, species with also elongated clypeus, separated from face by deep groove, but L. protenus Barron, 1994 has outstanding unique character state, occipital carina intercepting hypostomal carina before base of mandible ( Barron 1994)); short first metasomal tergite, as long as apically wide (in other members of the genus 1.2 - 1.8 times as long as apically wide, excluding L. zeugophorae Barron, 1994 and L. gauldi , but L. zeugophorae characterized by shorter clypeus and lack of costula) without longitudinal dorsal carinae (Fig. 1d); short area superomedia, 0.5 times as long as broad (Fig. 1c); infuscate wings (Fig. 2) with resemblance of areolet; and claws elongate, not pectinate. This species is morphologically closely related to L. gauldi and can be grouped together by the combination of the character states mentioned above. Synapomorphies shared with L. gauldi are short area superomedia (0.5 times as long as broad), infuscate wings, vestigial areolet, and elongate, not pectinate claws. The new species clearly differs from the Ecuadorean species in coloration (reddish face, gena, hind coxa and femur, and metasomal tergites except the last three tergites; Figs 1, 2), and by the lack of longitudinal dorsal carinae of first metasomal tergite. Lathrolestes gauldi has a black face, gena, completely black hind legs and metasoma, and defined longitudinal dorsal carinae of the first metasomal tergite (see Reshchikov et al. 2012).

Etymology

This species is named after Arkady Fiedler.

Distribution

Peru.

Conservation

This species seems to be a rare species, and further sampling is needed to clarify its distribution in the Western Amazonia.