Blacus (Ganychorus) basitarsis Sánchez et Wharton, 2010

Sánchez-García, José Antonio, Wharton, Robert Alan, Romero-Napoles, Jesús, Figueroa, José Isaac, López-Martínez, Víctor, Martínez, Ana Mabel, Pérez-Pacheco, Rafael & Pineda, Samuel, 2010, Four new species of Blacus Nees (Hymenoptera, Braconidae, Blacinae) from Mexico, Zootaxa 2641, pp. 37-46 : 40-42

Blacus (Ganychorus) basitarsis Sánchez et Wharton , NEW SPECIES

( Figs 2 a–i)

Description. MALE. Body length: 2.47–3.05 mm. Color: dark brown; palpi, mandible and pedicel yellowish; scape, tegula and legs (except hind tibia that are dark brown) yellowish brown; parastigma clear brown; pterostigma mostly brown with a little whitish at the ends.

Head: ovoid; vertex not convex; 21 antennal segments, third segment 1.33–1.57X longer than fourth, length of third, fourth and penultimate antennal segment 5.00–5.50, 3.50–4.00 and 1.20–1.25X their width, respectively; last antennal segment without fusion of two segments; eye length 1.05–1.16X longer than temple; maximum width of head 1.76–2.09X its minimum width (dorsal view); frontal suture superficial; malar suture present; malar space 1.33–1.75X as long as basal width of mandible; area in front of occipital carina crenulate; frons and vertex with some setae; face with some setae. Mesosoma: mesosoma length 1.31– 1.44X its height; pronotum reticulate rugose; posterior margin of epicnemial carina crenulate; epicnemial area superficially microstriate; precoxal sulcus rugose; metapleural flange medium size and truncated; notauli narrow, anteriorly crenulate and posteriorly rugose; mesoscutal lobes smooth, slightly convex; scutellum largely smooth with some wrinkles, its lateral carina distinct, slightly projecting apically; propodeal tubercles absent; propodeum rugose but with distinct median and lateral carinae, posterior surface reticulo-rugose. Wings: forewing with parastigma large; r inclivous; 3RS weakly curved basally; 1CUa 0.48–0.62X as long as 1CUb; r 0.19X as long as 3RS; 3RS 3.70X as long as 2RS; first discal cell more or less truncated anteriorly; forewing length 2.40–3.21 mm; hind wing with vein cu-a present. Legs: hind coxa dorsally rugose; length of femur, tibia and basitarsus of hind leg 8.09–8.80, 12.86–15.14, and 11.00–11.50X their width, respectively; arolia small. Metasoma: Length of first tergite 2.27–2.78X its apical width, superficially striate-rugose, dorsal carinae distinct over basal two-fifths, spiracle slightly projecting. Genitalia: aedeagus in form of bottle, wider in its medial part and pointed, with a medial deep channel; gonoforceps more or less pointed with some setae distributed of the medial part at the apex; digitus with six teeth; cuspis with some spines; lamina volsellaris with three setae.

FEMALE. Similar to male, except fore and middle legs have large, black bristles in tarsal claws; tarsal claw of hind leg with small, brown bristles; 20 antennal segments; ovipositor sheath 0.18–0.20X longer than forewing length.

Hosts. Unknown.

Material examined. Holotype ɗ MEXICO, Puebla, 4.7 mi SW La Cumbre, 23-VII-1987, 5100 ft, R. Wharton. Allotype Ψ MEXICO, Tamaulipas, Reserva El Cielo, La Gloria, 6500 ft, 21-VII-1994, pine-oak forest, J. Woolley. Paratypes: MEXICO, Chiapas: San Cristobal de las Casas, 1 ɗ San Felipe, 30-VI-1991, light trap, R.W. Jones. Estado de México: 1 ɗ Santa Catarina del Monte, 13-XI-1997, oak forest, José A. Sánchez; 1 ɗ Amecameca, Bosque de los Árboles de Navidad, 20-XI-1987, José A. Sánchez. Guerrero: 1 ɗ 1 mi NE La Laguna, 5000 ft, 17-VII-1984, J. Woolley collector. Guanajuato: 1 ɗ 4 km South Mangas Cuartas, 11-X-1996, Juniperus forest, José A. Sánchez; 1 ɗ 3 km South Xichu, 3-VIII-1996, pine-oak forest, José A. Sánchez. Michoacán: Charo, 2 ɗ, 1 Ψ Parque Insurgente José María Morelos y Pavón, 19°39’733’’N and 100°00’219”W, 2097 msnm, 13-X-2007, light trap, L.D. Esquivel and J.I. Figueroa; 1 ɗ same locality, 2120 msnm, 15-XI-2007, light rap, J.I. Figueroa; 1 ɗ same locality, 2116 msnm, 30-X-2007, entomological net, D. Esquivel; 1 ɗ Parque Cerro de Garnica, 19°39’946’’N and 100°49’640”W, 2967 msnm, 8-XI-2008, yellow pan trap, L. Flores E. and J.I. Figueroa. Morelos: 1 Ψ El Vigia Tlalnepantla, 28-VI-1988, Ma. S. López R. Oaxaca: 3 ɗ: 3.2 mi SW La Cumbre, 18-VII-1985, Woolley and Zolnerowich; 1 ɗ, 1 Ψ 3.9 mi NE San Gabriel Mixtepec, 16-VII-1985, Woolley and Zolnerowich. Puebla: 1 ɗ same data as holotype; 2 ɗ same locality 23-VII-1987, Woolley and Zolnerowich; 5 ɗ same locality 23-VIII-1987, 5100 ft, Woolley and Zolnerowich; 3 ɗ 13 mi N Zaragoza, 22-VII-1987, 4600 ft, R. Wharton. Holotype and allotype deposited in TAMU. Paratypes deposited in TAMU, JAS and IIAF-UMSNH.

Etymology. The specific name basitarsis was chosen because this species has a very long hind basitarsus. Distribution records. MEXICO (Chiapas, Estado de México, Guanajuato, Guerrero, Michoacán, Morelos, Oaxaca, Puebla and Tamaulipas).

Comments. This species is near B. collaris (Ashmead) and B. epitolus Achterberg , and runs to the couplet containing these two species in the key to New World species of Blacus (Ganychorus) in Achterberg (1988: 90–92); and is also near to B. julianae Sánchez & Figueroa sp. nov. The four species are distingued by the following modified key:

11 Eye length in dorsal view approx. 1.00–1.16X temple length; ovipositor sheath 0.16–0.56X forewing length. 12 - Eye length in dorsal view approx. 1.40–1.60X temple length; ovipositor sheath 0.12–0.14X forewing length ....

.............................................................................................................. Blacus (Ganychorus) epitolus Achterberg 12(11) Ovipositor sheath 0.16–0.20X forewing length; hind tibia length 9.2–15.14X its maximum width................... 13 - Ovipositor sheath 0.36–0.56X forewing length; hind tibia length 16.00X its maximum width..............................

.................................................................................................................... Blacus (Ganychorus) julianae sp. nov. 13(12) Length first tergite 2.27–2.78X its apical width; hind basitarsus length 11.00–11.50X its width; parastigma of

male enlarged ........................................................................................... Blacus (Ganychorus) basitarsis sp. nov. - Length of first tergite 1.70–2.00X its apical width; hind basitarsus length 9.00X its width; parastigma of male

not enlarged ........................................................................................... Blacus (Ganychorus) collaris (Ashmead)

The male genitalia of B. basitarsis is similar to B. ruficornis and B. julianae , however in B. julianae the apical portion of the aedeagus is wider than the other two species; also in B. julianae the lamina volsellaris has six setae while in B. ruficornis and B. basitarsis there are only three setae.

Figures

FIGURE 2. Blacus basitarsis sp. nov. a. male habitus; b. male: anterior view of head; c. male: dorsal view of head; d. female: dorsal view of mesosoma; e. male: lateral view of mesosoma; f. male wings; g. male: dorsal view of propodeum and first tergite; h. female: ovipositor; i. male genitalia.