Digonocryptus inermis ( Szépligeti, 1916 )

Aguiar, Alexandre Pires & Ramos, Adriana C. B., 2011, 2846, Zootaxa 2846, pp. 1-98 : 44-46

Digonocryptus inermis ( Szépligeti, 1916)

Figs 57, 58, 98, 138, 195, 235

Stenarella inermis Szépligeti, 1916:318 . ♀ Description, keyed. Holotype HNHM.

Digonocryptus inermis: Townes and Townes, 1966:126 . Generic transfer.

Digonocryptus inermis: Yu and Horstmann, 1998:241 . Listed

Description. FEMALE. Fore wing 13.4 mm.

Head. Ventral tooth of mandible longer than dorsal tooth. Clypeus apical area delimited by simple but well marked smooth border; clypeal margin with two teeth. Antenna apical articles missing; white band starting at flagellomere IV; 7 flagellomeres at least 50% white.

Mesosoma . Epomia absent. Mesopleuron with scarce short hairs, 99% of cuticular surface visible; its anterior area, between speculum and sternaulus, clearly longitudinally strigate, otherwise smooth and polished. Subalar prominence large and round, suboval, not keeled. Sulcus between sternaulus and scrobe weak but distinct. Posterior transverse carina of mesosternum represented by short straight carina (as in Fig. 167). Lower metapleuron regularly transversely striate, finer than on mesopleuron. Propodeum: area in front of anterior transverse carina smooth and polished, medially without traces of medio-longitudinal ridges. Propodeal apophyses present as very weak, almost linear carina. Posterior transverse carina absent. Area between transverse carinae regularly and transversely arcuate-striate (longitudinal behind apophyses, if distinct), including behind posterior transverse carina, except somewhat radially near petiolar foramen. Fore wing in Fig. 195; vein 3-Cu 1.52 length of 4-Cu. Hind wing in Fig. 235.

Metasoma. Postpetiole dorso-anteriorly weakly but distinctly concave; dorsolateral and median dorsal carinae absent; petiolar spiracles in dorsal view weakly prominent. Ovipositor 1.26 length of hind tibia. Apex of lower valve apex with 15 teeth.

Color. Head, entire mesosomal dorsum, dorsal angle of mesopleuron and metasomal tergites black, with yellow marks or stripes, legs from light orange to yellow, mesosoma laterally and entire propodeum light orange (255,153,051). Lateral pattern as in Fig. 57 (paratype from Peru) and Fig. 138 (holotype). Orbital band briefly interrupted at malar space only; width on supra-antennal area and temple about 0.2 of interocular distance, on gena widening ventrally until almost covering its entire width near mandible. Mandible basally yellow, centrally reddish brown, apically black. Clypeus and supraclypeal area yellow, except black apical area, basal half of clypeal sulcus, and from parantennal impression to torulus. Pronotum along entire anterior margin, except apex, with wide yellow stripe from side to side, medially briefly translucent; latero-dorsal margin with yellow stripe. Propleuron dark brown, postero-lateral angle of each hemisternite yellow. Mesoscutum black. Axillar carina yellow. Scutellum mostly yellow, except apex black. Subalar prominence and speculum entirely yellow; carinal triangle yellowish; mesopleuron with medio-anterior yellowish stripe. Propodeum as in Figs 57–58 (paratype from Peru), unicolorous. Fore coxa to tibia, mid and hind tibia deep yellow (255,204,000), mid and hind coxa to femur light orange; fore and mid basitarsomere deep yellow, remaining of fore and mid tarsi dark brown; hind tarsus from deep yellow basally to pale yellow on t4, entire t5 deep yellow. Petiole basally somewhat translucent yellowish brown; metasoma otherwise black (Fig. 98) with apical marginal yellow stripe on T1–7, extending also along lateral margin on T3–7, stripe wide on T1–3, half as wide on T4–6, widened medially on T7; T8 ventrally yellow.

Morphological variation. Fore wing 10.4–14.6 mm. Ovipositor 1.14–1.38 length of hind tibia. Antenna with 27 flagellomeres, white band with 8–9, starting at flagellomere 4 on apical 0.3– 0.5. Subalar prominence narrow, more or less elongate, somewhat keeled medio-longitudinally. Propodeal apophyses present as distinct, small or large scale-like structures. Posterior transverse carina shortly developed near base of apophyses. Apex of lower valve of ovipositor with 13 teeth. Color: clypeal sulcus laterally entirely black; mesopleuron either without the medio-anterior yellow spot or spot sometimes extending also posteriorly; speculum and carinal triangle light orange as mesopleuron; propleuron varying from a brief area latero-apically to mostly pale yellow; fore coxa basally usually with pale yellow areas.

On specimens from Peru the metanotum is colored as the propodeum (light orange), and the hind femur is dark brown at least on apical 0.5, up to almost entirely so. On the Peruvian specimen from Paucartambo the clypeal suture is entirely dark brown; yellow stripe on temple and gena very narrow; pronotum dorso-laterally with tiny yellow spot instead of stripe.

MALE. Unknown.

Comments. Very similar to D. archisius and D. varipes , from which it can be differentiated by having mesoscutum entirely black, without a central yellow spot (vs. with distinct spot); orbital band complete (vs. interrupted at 1 h in D. varipes ) and not projected mesally behind ocelli (vs. distinctly projected in D. archisius ); T8 ventro-laterally without yellow stripe (vs. present, distinct); T2 without a lateromarginal yellow stripe (vs. distinct through entire length of tergite); T7 yellow stripe along apical margin thickened and somewhat rounded medially (vs. from uniform width to medially narrowed or briefly interrupted); metanotum without a distinct central yellow spot (vs. always distinct).

The greatest morphological contrast was observed for specimens from Peru, collected between 400–750 m, versus those collected in the Brazilian Amazonia, at sea level, and might therefore be related to the altitude.

Material examined. 8 females. HOLOTYPE ♀ “ Bolivia // Mapiri ”; “ Stenarella // inermis// [?]”; “id nr.115298/ / HNHM// Hym. coll.”; “ Stenarella // inermis// Szép.” ( HNHM) . ♀ “ Brasil Pará // Serra Norte // Serraria // 20.IX.1985 ”; “ Brasil Pará// F. F. Ramos ”; “ Digonocryptus sp // M.C.Gonçalves DET 1994” ( MPEG). Left antenna beyond flagellomere 10, right antenna beyond flagellomere 4, hind right t2–5, missing, otherwise in good shape . Other specimens: ♀ “ Paucartambo // 400m. Cuzco // Peru II.28.52// Felix Woytkwski”; “upon recently// felled tree” ;

“ Digonocryptus // sp.20// Town´54” [right wings slide mounted] ( AEIC). ♀ “Tucurui, Pará// I. 1979 Brazil// M. Alvarenga ”; “ Digonocryptus // sp.37// Town. 1964” [right wings slide mounted] ( AEIC). ♀ “Quincemil, Perú// 750m nr. Marcapata // Oct. 20–30, 1962 // Luis Peña ”; “ Digonocryptus // sp.37// Townes ” ( AEIC). ♀ “ BRASIL // O B I D O S// ( Traira )// Estº Para // DIRINGS// {ABR 1962}”; “ Digonocryptus sp. // M.C.Gonçalves det.1994” ( MZUP). ♀ “ Brasil Pará // Serra Norte // Fofoca // 16.IX.1985 ”; “Brasil Pará// F. F. Ramos ”; “ Digonocryptus sp // M.C.Gonçalves DET 1994” ( MPEG). ♀ “Amazonas// Manaus 6.VII.55// Elias e Roppa leg ”; “D.Z.9/959” ( QBUM) .

Distribution. Bolivia, Brazil NR (PA) and Peru NR.