Chilicola (Chilicola) aisenensis Toro and Moldenke

Gibbs, Jason & Packer, Laurence, 2006, Revision and phylogenetic analysis of Chilicola sensu stricto (Hymenoptera: Colletidae) with the description of a new species, Zootaxa 1355, pp. 1-37 : 10-11

Chilicola (Chilicola) aisenensis Toro and Moldenke

Chilicola (Chilicola) aisenensis Toro and Moldenke, 1979 . An. Mus. Hist. Nat. Valparaíso 12:102. Male

Diagnosis: C. aisenensis males have a clypeus with an inverted T-shape mark similar to that of C. rubriventris ( Fig. 2B ). The hind tibia of C. aisenensis has the expanded ventral margin, preapical concavity, and apical transverse lamina common to most other members of the subgenus. The hind tibia can be differentiated from those of C. rubriventris , C pangue , and C. luzmarieae by the expanded ventral margin that forms a smooth convex curve, thickest at midlength and gradually tapers to the preapical concavity ( Fig. 2C ). The male of C. aisenensis also lacks the process on S1 that is present in C. colliguay , C. pangue , and C. rubriventris but is somewhat swollen as in C. luzmarieae and C. venticola . Females are unknown.

Description: Male: Length 5.9mm, forewing length 3.8mm, head width 1.6mm.

Colouration: Black-brown with following parts yellow: labrum; base of mandible; inverted T-shape on clypeus ( Fig. 2B ); lower paraocular area to just below antennal socket medially, to below epistomal suture laterally ( Fig. 2B ); dot on apicoventral surface of scape; anterior spot on tegula (remainder pale straw); apex of fore and mid femur; fore tibia except ventral surface suffused with brown; fore tarsus; apex and base of mid tibia and ventral surface suffused with brown; basoventral surface of mid basitarsus; base and apex of hind tibia and along anteroventral margin ( Figs. 2C, D ); base of hind basitarsus; dorsal surface of fore and mid trochanter with yellow-orange apex; ventral surface of antenna orange-brown from apical half of pedicel to terminal flagellomere; anterior margin of apical impressed areas of T1-T7 testaceous; wing venation brown except for testaceous basal regions of R, M+Cu, and V.

Pubescence: Long and thick on face and gena (1-3OD, longest medially; OD~ 0.14mm), with dense, short hairs on vertex (~1.5OD); flagellomeres with short setae; pronotum with short (<OD), laterally directed tomentum on posterodorsal margin; short and woolly on pronotum and lateral margin of mesoscutum (OD); relatively sparse and fine on dorsal surface of thorax (1-2OD) except long on lateral margins of scutellum and metanotum (2-3OD); long and coarse on posterior surface of propodeum and lateral surface of thorax except posterior mesepisternum (2-3OD); coarse on posterodorsal surface of fore femur, ventral surface of mid femur, and anterodorsal surface of hind femur (1-2OD); apical impressed portions of T1-T5 with posteriorly directed hairs, longest laterally (1-2OD); short apical tufts on S1-S4 (<OD).

Surface sculpture: Microsculpture granular; surface moderately dull except face below antenna somewhat shiny; clypeus unevenly punctate (i=1-3d), punctures densest apicolaterally (i~d), as on lower and upper paraocular areas and frons; surface of frons irregularly striate; gena striate with sparse punctures (i=1-3d); dorsal and lateral surfaces of thorax with dense punctures (i~d); dorsal area of propodeum rugose with few, coarse longitudinal striae; dense punctures on terga and S2-S6 apicolaterally (i=d).

Structure: Head broader than long (81:67); IOC less than half OOC (10:26); eyes convergent below, UOD:LOD (50:39); clypeus broader than long (31:21); vertex concave behind ocellar triangle in frontal view; ratio of lengths of pedicel:F1-F3 — 12:8:11:11; gena half as wide as compound eye in lateral view (11:22); relative lengths of scutellum: metanotum: dorsal area of propodeum — 42:22:25; maximum length to maximum depth of hind femur — 85:45; hind tibia with anteroventral margin convex basal to preapical concavity ( Fig. 2C ), maximum length, width, depth of hind tibia — 34:10:14; apex of hind tibia with transverse apical lamina; relative lengths of hind tibia and hind basitarsus — 34:22; S1 swollen apically forming an acute angle in profile; S7 with moderately long lateral lobe, ventrolateral lobe somewhat broad ( Fig. 2E ); apex of S8 with broad concavity ( Fig. 2F ); gonoforceps broad preapically with acute apex ( Fig. 2G ).

Material Examined: CHILE, Region XI: Aisén ( Chile Chico), 250m, 46°33'S, 71°43'W 21.xi.1966, E. I. Schlinger and M. E. Irwin, holotype male ( AMNH).

Geographic Distribution: This species is known only from the type locality and type specimen above ( Fig. 7 ).

Comment: The junior author collected near the type locality in Argentinean Patagonia in November 2003 but failed to find any C. aisenensis .

Figures

FIGURE 7. Partial map of South America showing Chile divided into regions (numbered from II to XI at left of land contour; Region Metropolitana de Santiago labelled MS), and Argentina showing known distribution of Chilicola s. str .. Markers indicate the location of the specimens examined. In some cases, multiple specimens may be represented by a single marker. Chilicola aisenensis = a, C. colliguay = c, C. luzmarieae = l, C. pangue = p, C. rubriventris = r, C. venticola, = v.

FIGURE 2 A – G. Chilicola aisenensis. A. head of male, frontal view, B. male, lateral view, C. hind tibia of male, anterior view, D. hind tibia of male, posterior view, E. S 7, F. S 8, G. genitalia, stippling represents membranous lobes of penis valves. Drawings of terminalia with ventral views to left, dorsal to right. Scale bar (for terminalia) = 0.1 mm.