Chilicola (Chilicola) venticola Packer

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 : 21-25

Chilicola (Chilicola) venticola Packer

Chilicola (Chilicola) venticola Packer, 2004 , J. Kans. Ent. Soc. 77:806. Male and female.

Diagnosis: Males of C. venticola lack the hind tibial modifications common to most of the subgenus. The only other species lacking the expansion and concavity is C. colliguay but the hind tibia of C. venticola is widest at the apex ( Fig. 6E ) while that of C. colliguay is widest at midlength. Unlike the latter species, C. venticola males have extensive yellow markings on the face and legs. Females of C. venticola are most similar to C. luzmarieae . Both have extensive orange-red colouration on the metasomal terga but lack the entirely red metasoma of C. rubriventris . In C. venticola , but not C. luzmarieae , the orange-red colouration extends to T5. Also, C. venticola lacks the carinate frontal line below the ocellus unique to the female of C. luzmarieae .

Description: Male: Length 5.5mm, forewing length 4.1mm, head width 1.5mm.

Colouration: Black-brown with following parts yellow: labrum; mandible except apical half orange-red; clypeus except for dark brown along epistomal suture ( Fig. 6C ); lower paraocular area to below (<OD) antennal socket ( Fig. 6C ); dot on apicoventral surface of scape; anterior spot on tegula, remainder pale straw; anteroapical region of all femora; fore tibia except ventral area at midlength brown; fore tarsus; mid tibia with apical and basal rings and anteroventral surface ( Figs. 6E, F ); mid tarsus except suffused with brown apically; hind tibia with broad apical and basal rings and anteroventral margin; hind basitarsus except dorsal apex brown; medioapical areas of S2-S6; narrow, posterodorsal band on apex of fore and mid trochanter yellow-orange; apicoventral bands of hind coxa and trochanter yellow-orange; ventral surface of antenna orange-brown from apical half of pedicel to terminal flagellomere; apical impressed areas of T1-T7 testaceous; wing venation brown except basal portions of R, M+Cu, and V testaceous.

Pubescence: Long and thick on face and gena (1-3OD longest medially; OD~ 0.12mm), dense on vertex (2OD); flagellomeres with short setae; short, appressed (<OD) tomentum on posterodorsal margin of pronotum and lateral margins of mesoscutum; posterior surface of propodeum and lateral surface of thorax except metepisternum with long hairs (2-4OD); sparser, finer hairs (2OD) on dorsal surface of thorax except for coarse, dense hairs on lateral margins of scutellum and metanotum; apical impressed portions of T1-T5 with posterolaterally directed, appressed tomentum (<2OD); short posteriorly directed apicolateral tufts on S2-S5 (~OD); coarse moderately long hairs on posterodorsal surface of fore tibia and basodorsal surface of hind femur (2OD).

Surface sculpture: Microsculpture granular; surface moderately dull except face below antennae somewhat shiny; clypeus and supraclypeal area with sparse punctures (i=2-3d); dense punctures on lower and upper paraocular areas and frons (i~d); gena with sparse punctation distally (i=1-3d); uneven punctation on pronotum, mesoscutum and scutellum (i=1-3d); metanotum and dorsal area of propodeum rugose; thorax with moderately dense punctation laterally (i=1-2d); metasomal terga with dense punctation anteriorly (i=d), moderately dense posteriorly (i=1-2d).

Structure: Head broader than long (73:66); IOC slightly larger than OOC (15:12); eyes convergent below, UOD:LOD (50:36); clypeus broader than long (30:24); vertex concave behind ocellar triangle in frontal view; median, longitudinal groove on clypeus; ratio of antennal segment lengths, pedicel:F1-F3 — 12:14:12:14; gena greater than half as wide as compound eye in lateral view — 12:20; scutellum: metanotum: dorsal area of propodeum — 41:19:25; hind femur maximum length to maximum depth — 41:22; hind tibia nearly cylindrical ( Figs. 6E, F ), expanded somewhat ventrally and dorsally, maximally broad at apex, maximum length, width, depth — 34:11:12, ventral surface with two carinae delimiting an approximately semicircular area apically, strong carina on the posteroventral side begins at midlength curving towards anteroventral surface, weaker carina extends between two ends of strong carina; hind tibia, hind basitarsus — 34:21; S1 swollen slightly, lacking process; S7 with moderately long lateral lobe ( Fig. 6G ); apex of S8 with broad concavity, spiculum bifurcate at apex ( Fig. 6H ); gonoforceps elongate ( Fig. 6I ).

Female: length 5.5mm, forewing length 3.5mm, head width 1.5mm.

Colouration: Black-brown except basal region of mandible yellow (remainder orangered); following parts yellow-orange: ventral surface of flagellum; narrow apical rings on all trochanters; apex of fore and mid femur; apical and basal rings of fore and mid tibia and dorsal surface of fore tibia; fore tarsus; mid distitarsus; wing venation brown except testaceous basal regions of R, M+Cu, and V; metasomal terga orange-red except brownblack anterior declivous surface of T1, anterolateral areas of T1-T4, majority of T5, and T6.

Pubescence: As in male except sparse hairs on face, dense on lower paraocular area, posterior pronotal margin with appressed tomentum; mesoscutum with sparse, short hairs (<OD), coarse, dense hairs near lateral margin; dense hairs on ventral surface of hind femur and tibia that form scopa (2OD); T1-T4 with widely separated apical bands of short, woolly hairs; S2-S5 with posteroventrally directed scopa (2OD).

Surface sculpture: As in male except punctation generally fine; frons longitudinally striate; metanotum less rugose with dense punctation (i=d); dorsal area of propodeum with irregular, longitudinal striae; metasomal terga with sparse punctation (i=2-3d).

Structure: Head broader than long (77:68); eyes convergent ventrally, UOD:LOD (48:38); gena more than half as wide as compound eye in lateral view (12:22); clypeus broader than long (31:22); IOC slightly greater than OOC (15:12); relative lengths of pedicel:F1-F3 — 10:10:6:8; relative lengths of scutellum, metanotum, dorsal area of propodeum — 21:9:13.

Material Examined: ARGENTINA, Chubut, Hwy 26 E. of Valle Hermosa, S45º46' 789'' W068º14' 636'', 657m, 27.xi.2003, L. Packer, one paratype male and one paratype female and one cleared male and cleared female stored in glycerine from a nest in a stem of Sisymbrium altissimum L. (Cruciferae) lodged in spiny bushes of Adesmia spp. ( Fabaceae ) (YU). The holotype and allotype were deposited in the Museo Nacional De Ciencias Naturales “Bernardino Rividavia”, Buenos Aires, Argentina by the junior author.

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

Comment: Packer (2004) described a nest of this species in a stem of Sisymbrium altissimum L. (Cruciferae).

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 6 A – I. Chilicola venticola. 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.