Symmorphus (Symmorphus) incisus Selis, 2018

Selis, Marco, 2018, Additions to the knowledge of solitary wasps (Hymenoptera: Vespidae: Eumeninae), with description of eight new species, Zootaxa 4403 (3), pp. 441-468 : 456-459

Symmorphus (Symmorphus) incisus Selis , sp. nov.

( Figs. 23–29 )

Diagnosis. This species is easily recognizable from the other species with incised occipital carina in the typical subgenus by the following characters [characteristics of the other species in brackets]: T2 weakly angled basally ( Fig. 29 ) [strongly angled in Symmorphus ambotretus Cumming, 1989 ]; apical lamella of T2 flattened ( Fig. 29 ) [apically bent upward in S. laoticus Gusenleitner, 2010 ]; S1 without longitudinal kneel ( Fig. 28 ) [with longitudinal kneel in S. laoticus ]; clypeus entirely black ( Fig. 24 ) [with red basal band in S. cavatus Li & Chen, 2014 ]; propodeum with posterior face flat ( Fig. 26 ) [with deep cavity in S. cavatus ] ( Cumming 1989; Gusenleitner 2010; Kim & Lee 2006; Li & Chen 2014).

Material examined. HOLOTYPE, ♀, pinned, “ India, Sikkim / Chumtang , 5120 ft. / 18–29 July 1959 / F. Schmid ” [printed on white label], “Leiden” [printed on green label] ( MSNVE).

Description. Female. Body length 11 mm; fore wing length 10 mm.

Head 1.1× as wide as long in frontal view. Clypeus convex in lateral view, apical margin almost truncate, apical teeth obtuse, two short longitudinal carinae running from apical teeth, clypeus 1.1× as long as wide ( Fig. 24 ). Distance from posterior ocellus to inner eye margin 2.3× as the distance from posterior ocellus to occipital margin; ocelli disposed as a obtuse triangle, distance between posterior ocelli 0.4× as long as distance between anterior ocellus and posterior ocellus. Temples 0.8× as wide as eye at bottom of ocular sinus; occipital carina distinct for entire length, with two medial incision forming a median tubercle ( Fig. 25 ). Scape 2.8× as long as apically wide; F1–F3 slightly longer than wide; following flagellomeres shorter than wide. Foveae small and located behind each posterior ocellus, each bearing a tuft of short hairs. Mesosoma in dorsal view elongate, 1.46× as long as wide. Pronotal carina short but well-defined for entire length, rounded on humeri. Mesoscutum 1.1× as long as wide between tegulae, weakly convex in lateral view; notaulices present as shallow triangular depression, parapsidal furrow deep and reaching middle length. Scutellum in lateral view flattened, anterior and posterior margins crenate, bearing a median oval depression. Metanotum angled in lateral view, dorsal horizontal face with a median triangular depression on anterior margin; posterior face weakly convex medially; transition between faces present as an angled carina. Tegulae broad, posterior lobe pointed, short and not equaling parategula. Parategulae short and angled basally, then straight. Mesepisternum convex, epicnemial carina strong but vanishing dorsally and not reaching pronotal margin; furrows strongly crenate. Propodeum oblique in lateral view, with a short dorsal plate; posterior face almost flattened with a median longitudinal carina running from base to apex, lateral face weakly depressed, dorsal face fused behind metanotum, dorsal median plate with two median foveae separated by a thin septum; posterior face separated by a weak carina, confused in the large punctures ( Fig. 26 ). T1 1.86× as wide as long in dorsal view, anteriorly with a transverse carina that runs from middle to sides, arching toward apical margin laterally; median longitudinal furrow broad and shallow; apical margin thickened ( Fig. 27 ). T2 weakly angled basally in lateral view; subapical margin thickened; apical lamella not reflexed, weakly depressed. S1 with basal transverse carina and lateral oblique ridges ( Fig. 28 ). S2 truncated basally, forming a fold followed by a large shallow depression; apical lamella not clearly separated ( Fig. 29 ).

Dorsal face of head and mesosoma covered by golden hairs, with denser golden pubescence on vertex. Clypeus, frons and lateral face of mesosoma with silvery hairs, denser on clypeus. Metasoma with very short, sericeous, yellowish pubescence.

Clypeus in ventral half shiny, in dorsal half micropunctate; punctures deep and sparse, becoming larger apically. Frons, vertex and gena with deep flat bottomed small punctures, arranged in irregular series on frons, sparser on vertex and gena. Dorsal face of pronotum with deep punctures, denser anteriorly; lateral face transversely striate. Mesoscutum with deep flat bottomed punctured, denser and larger anteriorly, becoming sparser around parapsidal furrows. Scutellum with some sparse deep punctures, interspaces far greater than puncture diameters. Metanotum coarsely and irregularly punctured. Mesepisternum very shiny, punctures deep and very sparse. Metaepisternum finely striate, some coarser striae in the middle. Propodeum with very large punctures on dorsal face, punctures almost as large as antennal insertions; posterior face with oblique transverse fine striae; lateral face with large punctures on posterior margin, with coarse irregular striae anteriorly. Anterior vertical face of T1 smooth with a preapical series of shallow punctures; posterior horizontal face of T1 very coarsely and densely punctured, punctures deep, apical thickened margin impunctate. T2 with oblique punctures, deeper and denser on margins. S2 with sparse deep punctures.

Color. Black; following parts red: small spot above interantennal space, small postocular spot, middle part of dorsal face of pronotum, inflated apical margin of T2, subapical band on T2 and S2. Apical lamella of T2 and S2 orange. Wings slightly infuscate, more infuscate along costal margin.

Male. Unknown.

Distribution. India: Sikkim.

Etymology. The specific name is in reference to the incised occipital carina of this species.

Figures

FIGURES 23–28. Symmorphus (Symmorphus) incisus sp. nov., ♀, holotype. 23, Habitus. 24, Head in frontal view. 25, Head in posterodorsal view. 26, Propodeum in posterodorsal view. 27, T1 in dorsal view. 28, S1 in ventral view.

FIGURES 29–34. 29, Symmorphus (Symmorphus) incisus sp. nov., ♀, holotype. 30–34,(Symmorphus) palawanensis sp. nov., ♀, holotype. 29, Metasoma in lateral view. 30, Habitus. 31, Head in frontal view. 32, Pronotum in dorsolateral view. 33, Propodeum in posterodorsal view. 34, T1 in dorsal view.