Chilicola (Chilicola) colliguay 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 : 13-15

Chilicola (Chilicola) colliguay Toro and Moldenke

Chilicola (Chilicola) colliguay Toro and Moldenke, 1979 . An. Mus. Hist. Nat. Valparaíso 12:100. Male and female.

Diagnosis: Males of C. colliguay do not have the extensive yellow colouration on the face and legs common to most species of the subgenus; it is black-brown except for a distal band on the clypeus ( Fig. 3C ) and the yellow to yellow-orange markings on the fore tibia and fore and mid distitarsi common to all males of this subgenus. Chilicola pangue also lacks extensive facial markings but has yellow on the lower paraocular area. The hind tibia of males is robust but lacks the preapical concavity seen in all other members of the subgenus except C. venticola ( Fig. 3E, F ). The hind tibia of C. colliguay is widest at midlength while the hind tibia of C. venticola is widest apically. The S1 of males bears a ventrally oriented process, as in C. pangue and C. rubriventris ( Fig. 15J ). Females of C. colliguay are entirely black-brown. Known females of other species all have extensively orange-red colouration on the metasomal terga.

Description. Male: Length 7.1mm, forewing length 5.0mm, head width 2.0mm.

Colouration: Black-brown with following parts yellow: narrow transverse band on apex of clypeus ( Fig. 3C ), anterior surface of fore tibia, fore and mid distitarsus orangeyellow; ventral surface of flagellomeres brown; tegula brown; wing venation brown.

Pubescence: Long and coarse hairs on face and gena (1.5-3OD longest medially; OD~ 0.15mm); shorter hairs at base of mandible (1.5OD); flagellomeres with short setae; mesoscutum with relatively dense hairs (2OD), denser on lateral margins of dorsal sclerites; long on lateral surface of thorax (2-3OD), dense on pronotal lobe and toward ventral surface; posterior surface of propodeum (2-3OD); short, sparse (~OD) on lateral apical impressed areas of T2-T4, posteriorly directed lateral tufts on S1 and S2 (1.5OD); medium length hairs on femora, tibiae and hind coxa (1.5OD), dense on anterior surface of mid tibia.

Surface sculpture: Microsculpture granular, sparse punctures on clypeus denser towards apicolateral margin (i=1-2d), supraclypeal area striate with unevenly spaced punctures (i=1-3d), dense punctures on lower and upper paraocular areas and frons (i~d); thoracic punctures large and dense (i~d) except punctures above scrobal groove absent; dorsal area of propodeum rugose; T1-T4 with fine, uneven punctation (i=1-3d).

Structure: Head broader than long (102:87); OOC slightly larger than IOC (23:21); eyes convergent below, UOD:LOD (70:56); clypeus broader than long (42:24); frontal line above supraclypeal area carinate; vertex slightly concave in frontal view behind ocellar triangle; weak, median, longitudinal groove on basal half of clypeus, ratio of antennal segment lengths, pedicel:F1-F3 — 16:24:30:32; gena more than half as broad as compound eye in lateral view (16:29); relative lengths of scutellum: metanotum: dorsal area of propodeum — 48:25:33; hind femur maximum length to maximum depth — 56:27; hind tibia swollen and broadest subapically ( Figs. 3E, F ), maximum length, width, depth — 45:13:17, with two carinae on ventral surface arising at midlength and ending basal to tibial spurs; hind tibia: hind basitarsus — 56:42; S1 with long, ventrally oriented, apical process; S7 with long, narrow ventrolateral lobe ( Fig. 3G ); S8 with apical lobe distinctly rounded with concave apex ( Fig. 3H ); gonoforceps elongate ( Fig. 3I ).

Female: length 6.5–7mm, forewing length 4.5–4.7mm, head width 1.9 mm

Colouration: Entirely black-brown.

Pubescence: As in male except sparser on face, gena, and mesoscutum; legs with moderately sparse hairs except fore tarsus with moderately long, curved hairs and hind leg scopa; T1-T4 apical impressed areas with widely separated appressed tomentum; S2-S4 with posteroventrally directed scopa, very dense on S2.

Surface sculpture: Punctures finer than on male; clypeus with small, sparse punctures (i=2-3d) dense near lateral margins (i=d); denser punctures in paraocular area (i~d), frons with punctures situated in longitudinal striae (i~d); pronotum with dense punctures (i~d); punctures on mesoscutum unevenly spaced, densest near margins (i=1-3d), scutellum with surface smooth and uneven punctures (i=1-2d); mesepisternum with somewhat sparse punctures (1~2d); dorsal area of propodeum reticulate; terga with very fine punctures (i=1- 3d).

Structure: Head broader than long (94:80); eyes convergent below, UOD:LOD (72:55); gena nearly as wide as compound eye in lateral view (20:22), clypeus flat, much broader than long (49:22); IOC smaller than OOC (15:17); frontal line carinate immediately above supraclypeal area; relative lengths of pedicel:F 1-3 — 15:14:10:12; relative lengths of scutellum, metanotum, dorsal area of propodeum — 46:24:28; all femora and mid and hind tibia somewhat robust.

Material Examined: CHILE, Region V: Valparaíso, Colliguay , 18.ix.1969, H. Toro, holotype male and allotype female, also two paratype males, one paratype female and an additional male ( AMNH); Valparaíso, Colliguay , 18.ix.1969, de la Hoz, one female; Peñuelas, 1.xi.1963, E. Cruzat P, female paratype ( AMNH); Region Metropolitana de Santiago: Santiago, Cuesta La Dormida, NW of Tiltil. 23.xii.1984, L. Peña, one female ( AMNH); Region VII: Los Queñes, 31.x.1983, H. Toro, one male; Region VIII: Nuble, Las Trancas, SE Recinto in Chillan area, 1200m, i.1984, L. Peña, one female ( AMNH); Nuble province, Pte. Marchant, xii.1998, A. Ugarte P, one female ( AMNH).

Geographic Distribution: Chile, from Valparaíso in the north to Nuble province in the south ( Fig. 7 ).

Comments: C. colliguay has not been commonly collected. This species appears to be active over five months (September-January) and appears earlier in the north.

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 3 A – I. Chilicola colliguay. A. head of female, frontal view, B. female, lateral view, C. head of male, frontal view, D. male, lateral view, E. hind tibia of male, anterior view, F. hind tibia of male, posterior view, G. S 7, H. S 8, I. 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.

FIGURE 15 A – K. Morphological structures described as character states for the phylogenetic analysis (refer to the Appendix for complete list of characters). A. antenna of male C. (Chilioediscelis) araucana, B. antenna of male C. colliguay, C. hind tibia of male C. colliguay, D. hind tibia of male C. rubriventris, E. hind tibial spurs of female C. (Anoediscelis) herbsti, F. hind tibial spurs of male C. colliguay, G. hind claws of female C. rubriventris, H. hind claws of female C. patagonica, I. swollen S 1 of male C. luzmarieae, J. S 1 projection of male C. rubriventris, K. S 6 of female C. (Chilioediscelis) patagonica, L. S 6 spinose projection of female C. rubriventris.