Probles (Euporizon) clypeola Khalaim, 2019

Khalaim, Andrey I. & Ruíz-Cancino, Enrique, 2019, Mexican species of the genus Probles Förster (Hymenoptera: Ichneumonidae: Tersilochinae), Zootaxa 4619 (2), pp. 201-230 : 208-210

3. Probles (Euporizon) clypeola Khalaim , sp. nov.

( Figs 16–19 )

Material examined. Holotype female ( UNAM), Mexico, Hidalgo, Huasca de Ocampo, Rancho Santa Elena, 20°06’N, 98°31’W, 2330–2535 m, Hueyapan River , 13.VI.2010, coll. A. Contreras R. et al.

Description. Female. Body length 3.1 mm. Fore wing length 2.7 mm.

Head, in dorsal view, roundly constricted posterior to eyes; gena 0.8× as long as eye width. Eyes glabrous. Clypeus ( Fig. 17 ) unusually small, 2.5× as long as broad and 0.75× as broad as face (shortest distance between inner eye margins), with ventrolateral margins conspicuously impressed and concave; clypeus very weakly convex in lateral view, smooth, with several very fine punctures in upper part, separated from face by broad furrow. Palp formula 4+3, maxillary palp relatively long with distal palpomere the longest. Mandible very strongly tapered and somewhat twisted, so distal apex is 0.4× as broad as basal mandibular width ( Fig. 17 ); upper tooth much longer than the lower. Malar space as long as basal mandibular width. Antennal flagellum slender, filiform, with 16 flagellomeres; subbasal flagellomeres 2.1–2.4× and subapical flagellomeres 1.3–1.5× as long as broad. Face with elongated median prominence. Face and frons very finely and shallowly granulate, weakly shining, without distinct punctures. Vertex very shallowly granulate medially and smooth laterally, weakly shining, with very fine punctures. Gena smooth, shining, with very fine punctures. Occipital carina complete. Hypostomal carina absent.

Mesoscutum granulate, dull, without distinct punctures. Notaulus very weak, with fine longitudinal wrinkle. Scutellum with lateral longitudinal carinae present at its front 0.25. Mesopleuron almost entirely smooth and shining, with sparse very fine (but distinct) punctures, peripherally somewhat partly granulate or scabrous. Foveate groove weakly oblique and almost straight, situated more or less in centre of mesopleuron, thin, deep and sharp, with rather strong transverse wrinkles. Propodeal spiracle small, separated from pleural carina by 2.5× diameter of spiracle. Propodeum granulate, impunctate, dull, with long and broad basal area which is about twice as long broad and almost 0.8× as long as apical area ( Fig. 18 ); basal longitudinal carinae weak, slightly divergent anteriorly; apical area flat, broad and widely rounded anteriorly ( Fig. 18 ); apical longitudinal carinae strong, complete, reaching transverse carina anteriorly.

Fore wing with second recurrent vein (2m-cu) postfurcal. Intercubitus (2rs-m) long, weakly thickened, longer than abscissa of cubitus between intercubitus and second recurrent vein (abscissa of M between 2rs-m and 2m-cu). First abscissa of radius (Rs+2r) almost straight, longer than width of pterostigma. First and second abscissae of radius (Rs+2 r and Rs ) meeting at slightly acute angle (about 85°). Metacarpus (R1) somewhat not reaching apex of fore wing. Second abscissa of postnervulus present, thus brachial cell is closed posteriorly. Hind wing with nervellus (cu1&cu-a) almost vertical. Legs slender. Tarsal claws not pectinate.

First tergite 3.0× as long as posteriorly broad, predominantly smooth with petiole finely striate laterally before glymma and postpetiole very shallowly granulate dorsally in basal part; tergite in cross-section centrally more or less round, with upper margin weakly convex in basal 0.7 and stronger convex in apical 0.3; postpetiole distinctly widened in dorsal view. Glymma small but deep, situated in posterior 0.55 of tergite, joining by distinct furrow to ventral part of postpetiole. Second tergite almost 1.3× as long as anteriorly broad. Thyridial depression clearly delimited, twice as long as broad, with posterior end rounded. Ovipositor robust, weakly bent upwards, slightly widened apically, with weak dorsal subapical depression ( Fig. 19 ); sheath about twice as long as first tergite.

Head, mesosoma and first tergite of metasoma dark reddish brown to brownish black. Palpi, mandible (teeth dark reddish brown) and tegula yellow. Clypeus yellow, darkened with reddish brown in upper half. Scape and pedicel of antenna brownish yellow; flagellum brown, somewhat darkening towards apex. Wings hyaline. Pterostigma brown. Legs brownish yellow, hind coxa extensively darkened with brown. Metasoma posterior to first tergite predominantly brown, pale brown ventrally.

Male. Unknown.

Etymology. The species is named after its unusually small clypeus.

Distribution. Mexico (Hidalgo) (Fig. 1).

Comparison. The new species is easily distinguished from all other Mexican species of Probles by its unusually small clypeus which is only 0.75× as broad as face ( Fig. 17 ) while in the other Mexican species the clypeus is about as broad as face (as in Fig. 33 ). The species is also characterized by strongly tapered, somewhat twisted mandible which is 0.4× as broad at level of teeth as at base ( Fig. 17 ).

Figures

FIGURES 16–19. Probles clypeola sp. nov., holotype, female: 16—habitus, lateral; 17—head, ventro-frontal; 18—propodeum, dorso-lateral; 19—ovipositor, lateral.

FIGURES 32–39. Probles lunai sp. nov., holotype (32, 35, 37, 39) and paratypes (Chiapas: 33, 38; Tamaulipas: 34, 36), females: 32—habitus, lateral; 33—head, front; 34—head with antennae, front; 35—head, dorsal; 36—head and mesosoma, ventro-lateral; 37, 38—propodeum, dorsal; 39—apex of ovipositor, lateral.