Digonocryptus insularis Aguiar et Santos

Aguiar, Alexandre P. & Santos, Bernardo F., 2012, Additions to the revision of Digonocryptus Viereck (Hymenoptera, Ichneumonidae, Cryptinae), with nine new taxa, new males, and distribution maps for all known species, Zootaxa 3282, pp. 1-41 : 16-17

Digonocryptus insularis Aguiar et Santos , sp. nov.

( Figs 22–23 , 72 )

Description. Holotype MALE. Fore wing 5.3 mm.

Head ( Fig. 22 ). Ventral tooth of mandible distinctly longer than dorsal tooth. Clypeus transition to apical deflected area a creased border; clypeal margin with two distinct tooth. Antenna with 26 flagellomeres, without white band ( Fig. 22 ).

Mesosoma ( Fig. 22–23 ). Mesopleuron glabrous, 100% of cuticular surface visible, a series of about ten straight, delicate, parallel strigation extending from speculum to epicnemial carina ( Fig. 23 ), mesopleuron otherwise smooth. Subalar prominence large, smoothly round, a oval structure ( Fig. 23 ). Sternaulus deep, crenulated, ending at once, midway between epicnemial carina and base of mid coxa. Sulcus between sternaulus and scobe indistinct. Posterior transverse carina of mesosternum small, developed centrally only, but distinct, thick. Mesoepimeron densely pilose. Lower metapleuron somewhat pilose, transversally strigate-rugulose. Upper metapleuron densely pilose. Propodeum area in front of anterior transverse carina smooth and polished, centrally without ridges extending from carina towards anterior margin, but with a few rugulosities; area behind carina obliquely pilose on each side. Propodeal apophyses inconspicuous, present as low scale-like structures, continuous with the complete, inverted V-shaped, well developed posterior transverse carina. Area between anterior and posterior transverse carinae obliquely rugose; area behind posterior carina irregularly rugose. Fore wing vein 3-Cu 1.40 times length of 4-Cu.

Metasoma ( Fig. 22 ). Postpetiole apex nearly flat; dorsolateral and median dorsal carinae absent; petiolar spiracles in dorsal somewhat prominent.T1–2 distinctly colliculate, T3–7 faintly allutaceous.

Color. Head and mesosoma background color black, both widely taken by whitish to pale yellow areas; metasoma mostly orange. Lateral pattern in Fig. 22 . Stripe of yellow around eye margin not interrupted; width on supra-antennal area and temple about 0.2 of interocular distance, taking entire width of gena ventral 0.4, then narrowing a little towards temple. Base of mandible widely whitish. Clypeus and entire supraclypeal area whitish. Prosternum, mesosternum, mesopleuron ventrally, subalar prominence, and entire mesepimeron, whitish; pectum, remainder of mesopleuron, including speculum, black; metapleuron whitish restricted to an elongate dorsal area. Pronotum dorsal margin laterally with distinct whitish stripe; collar fully whitish. Mesoscutum centrally, at level of tegula, with large, somewhat elongate whitish spot; tegula and scutellum fully whitish; mesosoma dorsally otherwise black. Propodeum as in Fig. 22 , fully black. Fore coxa and trochanter fully whitish; mid coxa whitish with small brown spot dorso apically; hind coxa laterally, except basal apex, and dorsally on apical half, dark brown, otherwise whitish; mid and hind trochanter and trochantellus patterned in brown and whitish; femora from light orange with brown on anterior leg to fully orange on hind leg; fore tibia and tarsus and mid tibia yellowish brown, hind tibia brown, apex dark brown, mid tarsus brownish, hind tarsus dark brown. Metasoma: T1 basal 0.8 dark brown, apex and T2–4 dark orange, T5–7 yellowish brown. Wings hyaline, faintly shaded.

FEMALE. Unknown.

Morphological variation. Fore wing 4.6–5.3 mm. Otherwise exactly as in the holotype.

Comments. The examined males run to D. denticulatus in the key provided by Aguiar and Ramos (2011), but only with some difficulty. This is because they have the postscutellum entirely black, which would have to be ignored at couplet 31. They seem indeed closest to D. denticulatus , but definitely do not belong to this species, from which they can be differentiated by having a monocolorous antenna (vs. with distinct white band on males and females), clypeus entirely white, including its single marginal tooth (vs. margin and tooth black), mesosternum white (vs. black), postscutellum black (vs. pale yellow), and hind coxa white and yellow (vs. orange). The monocolorous antennae is also somewhat typical, since it represents a rarely observed feature within Digonocryptus . Furthermore, D. denticulatus seems to occur only in southeastern and southern Brazil, with numerous records for that region only ( Fig. 60 ).

This species is likely to be related to the two male specimens mentioned by Aguiar and Ramos (2011): “[...] one from the Dominican Republic and one from the Virgin Islands ( St. John) [.. .] distinctive color patterns suggest they might represent two undescribed species.”

Etymology. The specific epithet derives from the Latin name insula, meaning island. In reference to the fact that the species is known only from a small island of the Lesser Antilles.

Material examined. 3 males. Holotype 3 from DOMINICA, St. Paul Parish, Springfield ATRC, 24.V–9.VI.1996, Malaise trap, Doolish, Killian, Wilson & Wooley, 96/003 ( TAMU). Triangle mount, complete, good shape. Paratypes ( TAMU, UFES): 1 3, same data; 1 3, same data except 93/003 ( TAMU). Triangle mount, smallest specimen missing a few apical flagellomeres on both antennae, otherwise both in good shape. Distribution. Dominica ( Fig. 72 ).

Figures

FIGURES 22 – 23. Digonocryptus insularis Aguiar et Santos, sp. nov. Holotype male. 22, Habitus. 23, Strigate area on dorsal portion of mesopleuron.

FIGURES 72 – 79. Distribution maps for species of Digonocryptus. 72, D. insularis Aguiar et Santos. 73, D. meridensis Aguiar et Ramos. 74, D. mettus Aguiar et Ramos. 75, D. narratorius (Fabricius). 76, D. niger (Szépligeti). 77, D. noxignis Aguiar et Santos. 78, D. petrus Aguiar et Ramos. 79, D. pitchus Aguiar et Ramos.

FIGURES 56 – 63. Distribution maps for species of Digonocryptus. 56, D. campygeus Aguiar et Ramos. 57, D. caraguatensis Aguiar et Ramos. 58, D. cennitus Aguiar et Ramos. 59, D. chiriquensis (Cameron). 60, D. coloratus (Szépligeti). 61, D. crassipes (Brullé). 62, D. denticulatus (Taschenberg). 63, D. diversicolor (Viereck).