Loxopus ichilus Santos et Aguiar, 2014

Santos, Bernardo F. & Aguiar, Alexandre P., 2014, Review of Loxopus Townes (Hymenoptera, Ichneumonidae, Cryptinae), with descriptions of six new species, Journal of Natural History 49 (31), pp. 1905-1935 : 1926-1928

Loxopus ichilus Santos et Aguiar , sp. nov. (Figures 4A, 6A, 7B, 7E, 8E)

Female

Fore wing 4.30 mm long. Head ( Figure 7B ). Antenna with 22 flagellomeres. CWH 1.71; CWW 1.92; MLW 1.33; MWW 0.56; MSM 0.63. Median line on supraantennal area faint. Mesosoma . Pronotum ventrally with distinct, short transverse striae. Scutellar carina in lateral view distinct on about 0.4 of scutellum. Subalar ridge moderately wide, elliptic ( Figure 7E ); epicnemial carina restricted to ventral 0.7 of mesopleuron, dorsally very weak, its shape irregular. Transverse furrow at base of propodeum with weak striae. Metapleuron coriarious; juxtacoxal carina absent; pleural carina absent. Fourth tarsomeres lateral lobe 4.0 × as long as mesal lobe. Anterior margin of propodeum medially slightly concave; SWL 1.51; posterior transverse carina complete, medially distinctly arched, sublaterally forming distinct crests. Fore wing vein 1-Rs + M uniformly curved; crossvein 1m-cu uniformly curved, slightly shorter than 1-Rs + M; crossvein 1cu-a arising opposite to base of 1M + Rs; veins 2cu-a and 2-Cu slightly angled; bulla of crossvein 2m-cu placed centrally; APH 0.47; AWH 1.11. Hind wing vein 2-1A absent; HW1C 2.00. Metasoma. T1LW 2.25; T1WW 2.17; T1 entirely coriarious, approximately cylindrical ventrolaterally; dorsolateral carina complete, moderately strong; ventrolateral carina interrupted on its midlength. T2LW 0.83; T2WW 2.38; T2–8 coriarious, mostly sparsely pilose, T3–8 with distinct pilosity laterally. OST 0.59; ovipositor basally distinctly downcurved, apically straight; dorsal valve without nodus, preapical notch distinct, ventral valve tip with nine oblique ridges ( Figure 6A ).

Colour. Head black and light yellow, mesosoma mostly ferruginous, metasoma dark brown and white. Head: black; mandible except apex, palpi, clypeus, malar space, ventral 0.05 of gena, most of supra-clypeal area and orbital band in supra-antennal area, light yellow (227,212,140); scape ventrally orange (180, 100, 040); supraclypeal area with brownish marks; scape dorsally, pedicel and f1 light brown; remainder of flagellum dark brown, f5–9 dorsally white; apex of mandible reddish. Mesosoma : ferruginous (181,085,032); collar, tegula, subalar ridge, dorsal division of metapleuron, metapleuron near hind coxa and small transverse marks over propodeal crests, whitish (232,215,150). Legs mostly fuscous (174,108,053); fore and mid coxae and all trochanters, whitish; hind coxa laterally with broad brown mark, anteriorly to the mark ferruginous, posteriorly whitish; hind trochantellus, base and apex of femur and base of tibia with brownish marks; all t5 blackish. Wings hyaline, fore wing with brownish spot covering apical portions of cells 2 + 3M and 1 + 2R1. Metasoma: T1 dark brown and whitish, brown area dorsally covering anterior 0.6, laterally covering anterior 0.3; S1 dark brown; T2 and T4–6 dark brown; T3 whitish, anteriorly with small brownish spot; T7–8 dorsally whitish, laterally dark brown; S2–4 whitish, S2 with lateral brown mark; S5–6 brown. Ovipositor reddish orange, its sheaths brown.

Male

Unknown.

Variation

Fore wing length 4.20–4.50 mm; one paratype with ventral 0.1 of gena yellow; one paratype with ovipositor apex with eight oblique ridges.

Comments

Generally similar to L. duckei and L. tenuis , from which it can be differentiated by having the gena almost entirely black (versus ventrally orange); subalar ridge moderately wide, elliptic (versus narrow, dash-like), and bright yellow (versus ferruginous or whitish). Further differentiated from L. tenuis by having the anterior portion of T1 blackish (versus orange), and from L. duckei by having the fore wing with distinct brownish spot (versus fore wing without spot).

Etymology

Latinized form of the type locality name, Rio Ichilo.

Material examined

3 ♀♀. Holotype ♀ from BOLIVIA, Santa Cruz, Rio Ichilo (Locality B) , 24 July 1965, ‘ See Bouseman field notes in Mammology Department’ ( AMNH). Mounted on triangle point; quite dirty, otherwise in good shape.

Paratypes: BOLIVIA: 2 ♀♀, same data as holotype except with additional label ‘ J. K. Bouseman L. Lussenhop Collectors’ ( AMNH) .

Distribution

Bolivia ( Figure 8E).

Figures

Figure 6. Ovipositor apex. (A) L. ichilus. (B) L. multicolor; (C) L. tenuis; (D) L. venezuelanus.

Figure 7. (A,B) Head, frontal view. (A) L. dodecius; (B) L. ichilus (C-E, G) Mesosoma, lateral view. (C) L. duckei; (D) L. australis; (E) L. ichilus; (F) L. docedius male, propodeum; (G) L. exius; (H) L. multicolor, metasoma.