Orthocentrus areolatus, Humala, 2019

Humala, Andrei E., 2019, Mexican species of the genus Orthocentrus (Hymenoptera, Ichneumonidae: Orthocentrinae), Zootaxa 4709 (1), pp. 1-83: 9-10

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Orthocentrus areolatus

sp. nov.

Orthocentrus areolatus   sp. nov.

( Figs 2 A View FIGURE 2 , 9 A View FIGURE 9 , 13 A View FIGURE 13 , 16 A View FIGURE 16 , 19 View FIGURE 19 )

Material examined. Holotype ♀: México, Tamaulipas, Gómez Farias , MT, 28.XI–10.XII.1998, leg. S. Hernández & C. Covarrubias ( UAT).  

Paratypes: 74 ♀ and 9 ♂: Nuevo León, Santiago, La Cieneguilla, Yerbas y B. Quercus   2, 3.IV.2010 leg. E. Ruiz   C.; Nuevo León, Linares, Las Avispas, Yerbas 7.IV.2010, leg. E. Ruiz   C.; Tamaulipas, 25 km SSW Cd. Victoria, El Madroño , 1200 m, 3.IV.2002, leg. D. R. Kasparyan   ; Tamaulipas, rancho Sta. Elena , 15 km SW Cd.Victoria, 964 m, MT 5–14, 14– 23, 23–30.IV, 30.IV–7.V.2010, leg. A. E. Humala & E. Ruiz   C.; Tamaulipas, 15 km SSE Cd. Victoria, El Madroño , 1400–1450 m; N 23°36.307′, W 99°13.558′, 12.I.2013, leg. A. I. Khalaim GoogleMaps   ; Tamaulipas, Miquihuana , rancho O. Hdz, B. Pino, 2500 m, MT, 9–23.V.2012, leg. E. Ruíz   C. & J. Treviño C.; Tamaulipas, Ocampo, Ej. El Bejuco. S. baja caducifolia, 900 m, MT, 13–26.VIII.2016, leg. E. Ruíz   C., M. & R. Ruíz C.; Morelos, Cuernavaca, 1900 m, University botanical garden, 2.III.2010, leg. A. E. Humala   ; Morelos, N Cuernavaca, 1930 m, Universidad , N 18°59.076′, W 99°14.223′, 27.X.2011, leg. A. I. Khalaim GoogleMaps   ; Veracruz, Jalapa, park near Institute de Ecologia , 1260 m, N 19°30.768′, W 96°56.349′, 17–18.II.2009, leg. A.I. Khalaim GoogleMaps   ; Jalisco, 10 km S Tequila, Mt. Tequila , N 20°47.4′, W 103°51.0′, 2600–2800 m, 5.I.2015, leg. A.I. Khalaim GoogleMaps   ; Oaxaca, Santiago, Comaltepec. 2427 m, N 17.58424° W 96.49428°; humid oak pine forest, MT, 12–20.VI.2007, leg. H. Clebsch GoogleMaps   ; Oaxaca, Cuilapam, Nogal. Red. 19.III.2006, leg. J.M. Maldonado ( UAT)   ; Chiapas: MPIO TENEJAPA, PARAJE YASHANAL, 20.VIII.1991, leg. R.W. Jones D. Bravo   ; 1 ♀ Tlaxcala, Nanacamilpa; San Felipe Hidalgo, Ejido Los Búfalos , N 19°27′35.2″, W 98°35′46.9″, 2831 m a.s.l., MT6, 1–26.VIII.2016, leg. A. Contreras & Y. Marquez GoogleMaps   ; 1 ♀ Hidalgo, Tlanchinol, La cabaña, arroyo lento, N 21°01′19.5″, W 98°38′45.1″ 1520 m, MT, 17–30.VI.2005, leg. A. Contreras GoogleMaps   et al.; 12 ♀ Hidalgo, Huasca de Ocampo, rancho Sta. Elena , 2480 m, MT3, 25.XI–26.XII.2005, leg. A.Contreras   et al.; 3 ♀ 25.I–23.II.2006, leg. Meléndez; 9 ♀ Hidalgo, Huasca de Ocampo, rancho Sta. Elena , MT, 29.XI–26.XII.2005, leg. Meléndez & Hdz   ; 9 ♀ and 3 ♂ Hidalgo, Huasca de Ocampo, rancho Sta. Elena , MT3, 25.I–23.II.2006, 21.IX– 19.X.2010, leg. A. Contreras   et al. ( UNAM, UAT, ZISP, KRC).

Description. Female. Body length 3.8–4.0 mm; fore wing length 3.2–3.3 mm.

Face medially as wide as high; matt, finely punctured, frons finely pustulate with hairs and finely strigose right behind antennal sockets, temples with fine matt-like coriaceous sculpture; eyes glabrous, face strongly prominent, inner orbits divergent ventrally; dorsal ridge of face inbetween antennal sockets without a median prominence; pro- file straight except dorsal third slightly impressed, edge of clypeus straight, antennal sockets on a high shelf, (Hw/ Fp = 3.1); subocular sulcus fine and shallow, bent towards occiput in lower part; labial palps short; maxillary palp reaching slightly beyond fore coxa. In dorsal view, head posteriorly slightly concave, temples distinct, about 0.2 × eye width, minimum distance between eyes 0.45 × of head width; posterior ocelli distant from eye by 0.8 × ocellar diameter; ocellar-ocular groove not developed. Minimum distance between antennal sockets about 1/4 diameter of socket; antenna thick, curled, with 26–28 similar-sized transverse-quadrate flagellomeres (n=20) which not gradually shortening apically; first flagellomere as long as wide and 1/4 of the length of scape; scape parallel-sided.

Mesosoma smooth and polished except pronotum striate postero-ventrally; mesoscutum with shallow notauli indicated anteriorly; epicnemial carina interrupted ventrally; in profile, scutellum not high, metapleuron slightly convex; propodeum with posterior transverse carina present between lateral longitudinal carinae and pleural carina, median longitudinal carinae subparallel, spiracles medium-sized.

Legs slightly flattened, broad; coxa polished, femur polished-coriaceous, tibia and tarsus coriaceous-granulate; hind coxa as long as first tergite, hind femur 2.9–3.0 × as long as high, hind tibia 4.2 × as long as apically wide; tibiae with spine-like setae.

Wings not particularly narrow; fore wing with radius (Rs+2r) meeting pterostigma at basal 0.45; areolet closed, large, conspicuously transverse, second recurrent vein (2m-cu) meeting areolet at apical 0.7, vein Rs straight; nervulus inclivous and postfurcal; hind wing with nervellus not intercepted.

First metasomal tergite elongate, slightly widening apically, 2.0 × as long as apically wide, coriaceous-rugose, with two well developed, nearly parallel, complete or posteriorly almost complete median longitudinal carinae; in dorsal view, slightly wider at spiracles; with deep transverse impressions originating at about middle of tergite, sloping posteriorly, not meeting centrally. Spiracles at 0.4 of tergite length. Second tergite 1.0 × as long as apically wide, coriaceous-rugose and somewhat strigose; with the central area convex, bounded by well-defined anterolateral oblique furrows connected with posterior transverse impressions originating at about middle of tergite and meeting centrally; basal thyridia oval, contrastingly coloured, not well-defined. Third tergite slightly coriaceous basally, all remaining tergites smooth and polished. Ovipositor straight, thin, without subapical notch; ovipositor sheath pointed, with setae as long as sheath width.

Body largely setose except eyes, propleuron, pronotum, mesopleuron and metapleuron; setae very scattered on propodeum, tergites and posterior coxae.

Brown to dark brown except face, frontal orbits near antennal sockets, malar space, upper hind corner of pronotum, tegula, fore and mid legs, hind trochantellus and, slightly, base of hind tibia yellowish brown, mouthparts and sternites creamy. Sometimes upper face laterally infuscate. Hind coxa apically, basitarsus basally largely yellow.

Male. Body length 4.0 mm; fore wing 3.5 mm.

Similar to female, but flagellum with 28–29 flagellomeres, basal flagellomere 3.0 × as long as wide; face, clypeus, malar space, mouth parts, inner orbits, and median bar between antennal sockets, scape, pedicell and base of flagellum ventrally, fore and middle legs, tegula and base of wings yellow; propleuron, hind corner of pronotum with large yellow triangle spot; coxa 3 mostly black, femur 3 dark brown dorsally.

Biology. Hosts unknown. All specimens of this common species were collected at mid and high-altitude sites in many Mexican states.

Distribution. Mexico (Chiapas, Hidalgo, Jalisco, Morelos, Nuevo León, Oaxaca, Tamaulipas, Tlaxcala, Veracruz).

Etymology. Named after the large areolet in fore wing.

Comments. Compared with the other species that have antennal sockets on a high protruding shelf, thick, curled antennae, and eyes glabrous, whole body not laterally flattened and wide areolet in fore wing, antenna with 26–27 flagellomeres and face is orange (unlike in O. pentagonum   ) and mesosoma is entirely fuscous (unlike in O. dorsofuscus   ).


Universidad Autónoma de Tamaulipas


Universidad Nacional Autonoma de Mexico