Colletes ventricarinatus Ferrari, 2017

Ferrari, Rafael R., 2017, Taxonomic revision of the species of Colletes Latreille, 1802 (Hymenoptera: Colletidae: Colletinae) found in Chile, Zootaxa 4364 (1), pp. 1-137 : 116-119

Colletes ventricarinatus Ferrari , new species

( Figs. 62A–F )

Diagnosis. Colletes ventricarinatus n. sp. is distinct in having the clypeal mid-longitudinal area depressed and lacking carina, mesosomal pubescence with off-white and black hairs intermixed, mesepisternal interspaces rugulose, T2–T5 black and covered with pale-yellow appressed hairs, and S6 carinate laterally in female.

Colletes ventricarinatus n. sp. is most similar to C. murinus . The female of these species, however, can be distinguished by clypeus with a transverse depression subapically in C. ventricarinatus n. sp. (clypeus with a pair of pits subapically in C. murinus ); and S6 carinate laterally in C. ventricarinatus n. sp. (S6 not carinate laterally in C. murinus ). The males can be differentiated by F2 1.2x as long as F 1 in C. ventricarinatus n. sp. (F2 1.4x as long as F 1 in C. murinus ); and mesepisternal interspaces rugulose in C. ventricarinatus n. sp. (mesepisternal interspaces smooth in C. murinus ).

Description. FEMALE ( Figs. 62A, 62C, 62E ): Dimensions (mm): Approximate body length 10.8; head width 4.0; head length 3.0; intertegular distance 3.1; forewing length 9.2.

Colouration: Black except dark-brown on tegula, wing veins (except basal veins of forewing black), tibial spurs, dorsal surface of tarsomeres 3–5, marginal zones of T1–T5, ventrally reflexed lateral areas of T1. Palebrown on marginal zones of S1–S5. Reddish-brown on distal half of tarsal claws; marked on distal 1/3 of mandible.

Structure: Labrum medially flat and without ridges. Clypeal mid-longitudinal area evenly moderately deeply depressed; depression narrow (0.5x MOD) on upper 2/3, broad (1.2x MOD) on lower 1/3; adjacent lateral area convex; apicomedial ridge absent. Malar area subequal to basal depth of mandible (25:24). F1 1.6x as long as its apical width (40:25). UID:LID (77:81). Genal area concave behind upper summit of compound eyes in lateral view. Dorsolateral angle of pronotum rounded. Horizontal surface of metapostnotum ~0.6x as long as metanotum (25:44); metapostnotal pits well-delimited; posterior transverse carina sinuous and interrupted medially. Posteromedial surface of front coxa without spine. Posterior hind tibial spur ciliate. Hind basitarsus ~3.4x longer than broad (48:14). Outer rami of hind tarsal claws ~ 2x as long as inner rami (17:9). Posterolateral area of S6 flat and bearing carina; marginal zone not depressed.

Pubescence: Mixed off-white and black, plumose, erect, long on paraocular, interantennal, frontal and genal areas (except exclusively off-white and very long near proboscidial area), pronotal lobe (except off-white hairs moderately short), mesoscutum, scutellum, mesepisternum, metepisternum, ventral surface of coxae (except moderately short), posteroventral surface of trochanters and front femur, ventral margin of mid femur; such hairs very long on vertexal area, metanotum, upper margin of lateral surface of propodeum. Fulvous, erect, moderately long setae on posterior surface of front tibia and basitarsus, dorsal surface of mid and hind tibiae and basitarsi (except suberect on mid tibia); such hairs long on posterior margin of mid basitarsus; very long on posterior margin of hind basitarsus. Fulvous, suberect, moderately short, thick setae on ventral surface of mid and hind tarsi; thickest towards distal margin. Fulvous, suberect, very long hairs, which are branched only apically on anterior surface of hind femur and tibia. T1–T5 covered with pale-yellow, dense appressed hairs (except much sparser on T1); T1 also with pale-yellow, plumose, erect, long hairs; such hairs moderately short on T2; T3–T5 also with black, erect moderately long setae (shorter on T3). S1 with pale yellow, plumose, erect, long hairs. S2 with fulvous, suberect, moderately short hairs, which are branched only apically. S3–S4 with pale-yellow, erect, moderately short setae laterally; plumose, suberect, short hairs on marginal zone. S5–S6 bare.

Surface sculpture: Clypeal mid-longitudinal depression densely and finely punctate; adjacent convex area with very sparse moderately fine punctures; interspaces smooth; striate apicolaterally. Malar area longitudinally striate. Supraclypeal area rugulose but somewhat shiny. Paraocular area densely and moderately finely punctate below (except slightly coarser and sparser towards antennal socket); punctures crowded and fine above. Frontal area densely and moderately finely punctate; interspaces rugulose. Vertexal area densely and finely punctate near lateral ocellus; sparser and with minute punctures intermingled near eye; interspaces smooth (except rugose near occipital margin). Mesoscutum and scutellum densely and moderately coarsely punctate (except moderately coarsely punctate on mesoscutal mid-posterior area); interspaces smooth. Metanotum densely and finely punctate; interspaces rugose. Mesepisternum moderately finely and moderately densely punctate; interspaces rugulose but somewhat shiny. Metepisternum rugulose above and below; obliquely striate medially. Lateral surface of propodeum with very sparse fine punctures; interspaces imbricate. Upper area of vertical surface of metapostnotum transversely striate medially. Metasomal terga minutely and moderately sparsely punctate; interspaces imbricate. Metasomal sterna finely and moderately densely punctate (except sparsely punctate on mid-longitudinal band of S2–S5 and densely punctate on mid-longitudinal band of S6).

MALE ( Figs. 62B, 62D, 62F ). As in female, except for usual secondary sexual characteristics and as follows:

Dimensions (mm): Approximate body length 9.3; head width 3.7; head length 2.9; intertegular distance 2.4; forewing length 8.7.

Colouration: Proximal half of tarsal claws pale-brown. Ventrally reflexed lateral areas of T2 and disc of S6 dark-brown.

Structure: Labral median area lacking ridges. Clypeal mid-longitudinal area evenly narrowly depressed (0.6x MOD). Malar area ~ 2x as long as basal depth of mandible (33:16). F1 1.2x as long as its apical width (27:23). UID:LID (78:72). Dorsolateral angle of pronotum triangular acute. Horizontal surface of metapostnotum ~0.4x as long as metanotum (20:44). Hind basitarsus ~2.8x longer than broad (48:17). Outer rami of hind tarsal claws ~1.4x as long as inner rami (20:14). Posterolateral area of S6 lacking carina. S7, S8 and genital capsule as in Figs. 63A, 63B, 63C , respectively.

Pubescence: Setae on dorsal surface of mid basitarsus and hind basitarsus and tibia pale yellow. Pale-yellow, plumose, suberect, short hairs on marginal zones of S2–S5. Setae on S3–S4 evenly distributed. Pubescence on S5– S6 similar to that on S3–S4.

Surface sculpture: Clypeal convex area nearly impunctate. Vertexal area mostly rugose. Mesoscutal and scutellar interspaces rugulose. Upper area of vertical surface of metapostnotum transversely striate medially. S2– S6 evenly densely punctate.

Type material. Holotype ♀ — “ CHILE Region I; Mirador de; Socoroma ; 7.iv.00 L. Packer ”. “ CCDB-28231 B10 ”. “HOLOTYPE; Colletes ventricarinatus ♀; Ferrari, new species”. { PCYU}.

Paratypes: CHILE — Region XV: 2km S of Murmuntani , (-18.382, -69.549), 3340m, [L.Packer], 1♂, { PCYU} . 5km S of Putre , (-18.271, -69.573), 3548m, [L.Packer], 1♀ 1♂, { PCYU}. Central Hidroeléctrica de Chapiquiña, (-18.386, -69.553), 3460m , 9/iv/2000, [L. Packer], 2♀♀, { PCYU}. Mirador de Socoroma , (-18.279, - 69.584), 3414m , 7/iv/2000, [L. Packer], 5♀♀, { PCYU}. Pucará Belén , (-18.472, -69.527), 3158m , 1/xi/2013, [S. Monckton], 1♂, { PCYU}. Putre, (-18.193, -69.578), 3433m, [L. Packer ], 1♂, { PCYU}; idem, except 7/iv/1990, [L. Peña ], 1♀, { AMNH}.

Range. Chile (Region XV). See also Fig. 46B .

Biogeographic distribution. South American transition zone (Desert and Atacama provinces). Northern Chilean species distributed in the summer rainfall area at altitudes of 3100–3600m a.s.l.

DNA barcode. Available. BOLD: ACK8653 (3♂♂). Distance from the nearest neighbour ( C. nigritulus ): 7.29–7.71%.

Floral hosts. Unknown.

Etymology. The specific epithet ventricarinatus is a reference to the distinct carina on the lateral area of S 6 in the female of this species, which is unique amongst all Chilean Colletes .

Comments. Uncommon species found only in Region XV at elevations of 3000m a.s.l. or higher.

Figures

FIGURE 62. Colletes ventricarinatus Ferrari, n. sp. Female: (A) habitus, lateral view; (C) face, frontal view; (E) habitus, dorsal view.Male: (B) habitus, lateral view; (D) face, frontalview; (F) habitus, dorsal view.Scale bars = 2mm.

FIGURE 63. Dorsal view of the male terminalia of C. ventricarinatus n. sp. (A) S7; (B) S8; (C) genital capsule. Scale bars = 1mm.

FIGURE46.Geographic distribution by Colletes species.(A) C.nigropilosus n. sp. and C.musculus; (B) C.ventricarinatusn. sp., C. quelu and C. nigritulus; (C) C.simulatus n. sp., C. sulcatus and C. toroi n. sp. Scale bars approximately 300 km.