Chasca andina Musetti & Johnson

Johnson, Norman F. & Musetti, Luciana, 2012, Genera of the parasitoid wasp family Monomachidae (Hymenoptera: Diaprioidea), Zootaxa 3188, pp. 31-41 : 36-37

Chasca andina Musetti & Johnson , new species

urn:lsid:zoobank.org:act:EF0EB399-FF7D-43CF-A451-E6471F2A229C urn:lsid:biosci.ohio-state.edu:osuc_concepts:276541 Figures 4–9 ; Morphbank10

http://www.morphbank.net/?id=579899 Description. Body length of female: 6.6–8.7 mm (n=8). Body length of male: 5.0– 6.8 mm (n=21). Fore wing length of male: 3.9–4.8 mm (n=17). Body color of female: head, mesosoma light brown to reddish brown, metasoma brown. Sculpture of female vertex: irregularly punctate ( Fig. 5 ). Frontoclypeal suture of female: deeply impressed. Ventral margin of clypeus: weakly, evenly convex. Tyloid of male antenna: indicated by longer, suberect seta near base of antennomere. Sculpture of female pronotum: irregularly rugulose. Length of notaulus: percurrent ( Fig. 5 ). Posterior separation of notauli: closely approximated, separated by distance subequal to width of notaulus ( Fig. 5 ). Shape of mesoscutellar pit: semicircular. Sculpture of female mesopleural depression: irregularly rugulose punctate ( Fig. 6 ). Length of female fore wing: minute, not surpassing posterior margin of mesoscutellum ( Figs. 4–6 ). Length of female hind wing: minute, not surpassing posterior margin of metanotum.

Diagnosis. Chasca andina may be distinguished in the female sex by the extremely reduced wings, the reddish color of the head and mesosoma, and the coarse sculpture of the vertex and pronotum. Males may be distinguished from C. gravis by the absence of raised tyloids on antennomeres 4–7.

Etymology. The epithet andina is an adjective referring to the Andes Mountains.

Link to Distribution Map. [http://hol.osu.edu/map-full.html?id=276541]

Material Examined. Holotype, female: CHILE: Bío-Bío Reg., Concepción Prov., Hualpén Commune, road to Ramuntcho (Ramuncho), 12.IV.1980, T. Cekalovic, OSUC 18632 (deposited in CNCI). Paratypes: CHILE: 6 females, 22 males, 1 unknown, OSUC 116692 ( AEIC); OSUC 117657, 117659–117666 ( ANIC); OSUC 18622, 18633 ( CNCI); OSUC 117241–117255 ( FSCA); OSUC 19232–19233 ( MCZC). Other material: CHILE: 1 male, OSUC 117658 ( ANIC).

Comments. This species is known so far only from a small region of approximately 350 km (north to south) in central Chile. It is sympatric here with the more widespread Chilean species Monomachus porteri Brèthes. In contrast to C. gravis , several females have been collected. These vary some 25% in overall size, suggesting either variation in host species, host size, or the possibility that the parasitoid may at least sometimes be gregarious. The specimen with the identifier OSUC 117658 is broken (head and mesosoma lost) and is therefore not designated as a paratype.

Figures

FIGURES 4 – 9. Chasca andina Musetti & Johnson. 4, lateral habitus, holotype female (OSUC 186320; 5, head and mesosoma, dorsal view, holotype female; 6, head and mesosoma, lateral view, holotype female; 7, lateral habitus, paratype male (OSUC 18633); 8, head and mesosoma, dorsal view, paratype male (OSUC 18633); 9, stigma and radial cell of fore wing, paratype male (OSUC 18633). Scale bars in mm. Morphbank: http: // www. morphbank. net /? id = 579899