Chilicola (Chilicola) luzmarieae, Gibbs, Jason & Packer, Laurence, 2006

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 : 15-19

Chilicola (Chilicola) luzmarieae new species

Diagnosis: Males can be distinguished from all other species of the subgenus by the laterally compressed hind tibia ( Figs. 4E, F ). As in some other species of the subgenus there is an apical lamina and a preapical concavity, but unique to C. luzmarieae is the sinuate anteroventral margin with a preapical projection ( Fig. 4E ) basal to the concavity and the apical lamina is longitudinal only in C. luzmarieae . Additionally, males have a swollen S1 that is expanded towards the apex similar to that of C. aisenensis and C. venticola . Males of C. colliguay , C. pangue , and C. rubriventris have an S1 with a ventrally oriented apical process. The colouration of the female metasoma is distinct from other known species in the subgenus. T1-T4 orange-red except for black anterolateral quarters, orange red colouration extends onto posterolateral regions of terga, ventrally reflexed portion with testaceous hue, T5-T6 brown. Metasomal terga of C. colliguay are entirely dark and in C. rubriventris T1-T6 are entirely orange-red. Chilicola venticola has orange-red colouration on T1-T5 with dark brown lateral areas. In addition, females of the new species are unique in the subgenus in having a frontal line that is carinate immediately below the ocelli. The frontal lines of other species are raised but only near the supraclypeal area. No female specimens are known for C. pangue or C. aisenensis .

Description: Male (Holotype): Length 6.5mm, forewing length 4.5mm, head width 1.6mm.

Colouration: Black-brown with following parts yellow: labrum; mandible except for ventral margin brown and apical half orange-red; clypeus except for dark brown along epistomal suture ( Fig. 4C ); lower paraocular area to below antennal socket ( Fig. 4C ); dot on apicoventral surface of scape; anteroapical region of fore and hind femur; femoral apex and tibial base all legs; fore tibia except for posteroventral surface; apical and basal rings of mid tibia, anterior surface suffused with brown; hind tibia except for apical two thirds of anterodorsal surface brown-black and ventral surface suffused with brown ( Figs. 4E, F ); all tarsi except hind basitarsus apicodorsally and dorsal surface of hind mediotarsus brown-black; following parts orange-brown: ventral surface of antenna from apical half of pedicel to terminal flagellomere; apex of dorsal surface of fore and mid trochanter; anterior margin of apical impressed areas of T1-T7 and tegula 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~ 0.15mm), with sparse finer hairs on vertex; flagellomeres with short setae; short (<OD) tomentum on posterodorsal margin of pronotum; posterior surface of propodeum and lateral surface of thorax except metepisternum with long hairs (3OD); sparser, finer hairs (2OD) on dorsal surface of thorax except thicker and denser near wing base; thick, long hairs on anterior surface of mid tibia and dorsal surfaces of hind coxa and hind femur (2OD); apical impressed portions of T1-T5 with posterolaterally directed white tomentum (<1.5OD); long, dense, ventrally oriented hairs on S2-S3 (<2OD); short posteriorly directed apical rows of hair S4 and S5 (<OD).

Surface sculpture: Microsculpture granular; surface moderately dull except face below antennae somewhat shiny; clypeus with sparse punctures (i=2-3d), denser apicolaterally (i~d); dense punctures on lower and upper paraocular areas and frons (i~d); surface of frons irregularly striate; punctures uneven on mesoscutum (i=1-3d); those of scutellum smaller and denser (i~d); dorsal area of propodeum with coarse longitudinal striae; punctures on terga dense anteriorly (i=d) and moderately sparse posteriorly (i=1-3d).

Structure: Head broader than long (81:73); IOC slightly larger than OOC (16:15); eyes convergent below, UOD:LOD (54:41); clypeus broader than long (33:23); vertex flat behind ocellar triangle in frontal view; weak, median, longitudinal groove on clypeus, ratio of lengths of pedicel:F1-F3 — 11:14:15:15; gena approximately half as wide as compound eye in lateral view (11:21); relative lengths of scutellum: metanotum: dorsal area of propodeum — 41:20:29; hind femur maximum length to maximum depth — 29:13; hind tibia laterally compressed ( Fig. 4F ), length: width: depth — 23:5:11; anteroventral margin sinuate with a distinct preapical projection ( Fig. 4E ) basal to strong preapical concavity; apical lamina of hind tibia oriented longitudinally in line with inner hind tibial spur; hind tibia, hind basitarsus — 38:23; S1 swollen apically, acutely angular in profile, semicircular in posterior view; S7 ventrolateral lobes small, dorsolateral lobe broadly expanded with filamentous apex ( Fig. 4G ); S8 apex broadly concave, spiculum slightly wider at apex ( Fig. 4H ); volsella broad, gonoforceps elongate ( Fig. 4I ).

Female (Allotype): length 5.6mm, forewing length 4.2mm, head width 1.8mm

Colouration: Black-brown except for yellow dot on mandible base (remainder orangered); following parts yellow-orange: ventral surface of antennal flagellum; narrow apical rings on all trochanters; apex of fore and mid femora; apical and basal thirds of fore tibia with dorsal surface suffused with brown; mid tibial base and apex; fore tarsus (except posterior fore basi- and fore mediotarsi suffused with brown); mid distitarsus; wing venation brown except testaceous basal regions of R, M+Cu, and V; T1-T4 orange, with black anterolateral marks, T1 with anterior declivous surface suffused with brown; S1-S4 testaceous.

Pubescence: As in male except as follows (OD~ 0.12mm), denser on lateral surface of thorax; posterior margin of pronotum with appressed tomentum; posterior surface of fore femur, outer surface of hind femur that forms scopa (1-2OD), hind tibia (2OD), widely separated bands on apical impressed area of T1-T3; S2-S4 with posteroventrally directed scopa (>1OD).

Surface sculpture: As in male except punctures finer, clypeal surface finely granulose with small, sparse punctures (i=2-3d); denser punctures on paraocular area (i~d), frons with punctures situated in longitudinal striae (i~d); punctures on mesoscutum (2-3d) denser between pronotal lobe and notaulus (i=d); small, relatively dense punctures on scutellum (i=1-2d); dorsal area of propodeum reticulate with longitudinal carinulae, terga with sparse punctures (i=3d).

Structure: Head broader than long (89:78); eyes convergent ventrally, UOD:LOD — 29:25; gena broader than half the width of eye in lateral view — 17:24; clypeus broader than long (20:13); IOC slightly greater than OOC (17:16); frontal line carinate immediately below ocellus; relative lengths of pedicel:F1-F3 — 13:11:8:10; relative lengths of scutellum, metanotum, dorsal area of propodeum — 22:11:16.

Material Examined: CHILE, region VII, Laguna del Teno, ii.2003, A. Ugarte P., holotype male and allotype female (YU).

Geographic Distribution: This species is known only from the type locality ( Fig. 7 ). Etymology: This species is named in honour of the collector’s wife: Luzmarie Ugarte.

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 4 A – I. Chilicola luzmarieae. 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.