Colletes longiceps Friese, 1910

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 : 73-76

Colletes longiceps Friese, 1910

( Figs. 36A–F )

Colletes longiceps Friese, 1910: 649, 1912: 366 ; Cockerell 1926: 302; Jaffuel & Pirion 1926: 364; Toro 1986: 122, 1999: 29; Moure & Urban 2002: 12; Moure et al. 2007: 683; Montalva & Ruz 2010: 22; Ascher & Pickering 2017. Lectotype ♂ (examined) designated by Moure & Urban (2002: 12). {ZMB}.

Diagnosis. The female C. longiceps is recognizable by having the combination of the following characteristics: clypeal mid-longitudinal area not depressed, paraocular area and mesosomal dorsum with pale-yellow hairs only, posterior hind tibial spur pectinate, and T1–T5 covered with pale-yellow, dense appressed hairs. Males are diagnosable by having the upper area of vertical surface of metapostnotum projected posteriorly in relation to horizontal surface, and T7 apex acute.

Colletes longiceps is very similar to C. sulcatus , but their females can be differentiated by the clypeal midlongitudinal area not depressed in the former (clypeal mid-longitudinal area deeply depressed in the latter); and posterior hind tibial spur pectinate in C. longiceps (spur ciliate in C. sulcatus ). The males can be distinguished by the paraocular area with only pale-yellow hairs in C. longiceps (paraocular area with pale-yellow and black hairs intermixed, in C. sulcatus ); and mesepisternal interspaces rugulose in C. longiceps (mesepisternal interspaces smooth in C. sulcatus ).

Redescription. FEMALE ( Figs. 36A, 36C, 36E ): Dimensions (mm): Approximate body length 10.3–11.5; head width 3.4–3.8; head length 2.5–2.7; intertegular distance 3.1–3.5; forewing length 7.8–8.4.

Colouration: Black except pale-brown on tegula, wing veins (except vein R of forewing black), dorsal surface of distitarsi, stigma, marginal zones of T1–T5, posterior half of mid-longitudinal band of S6. Reddish-brown on distal half of tarsal claws; marked on distal 1/3 of mandible. Dark-brown on dorsal surface of flagellum, dorsal surface of mediotarsi. Pale-yellow on tibial spurs, proximal half of tarsal claws, marginal zones of S1–S5.

Structure: Labrum medially concave; concavity margined by lateral ridges. Clypeal mid-longitudinal area not depressed; adjacent lateral area convex; apicomedial ridge absent. Malar area subequal to basal depth of mandible (41:39). F1 ~1.5x as long as its apical width (34:22). UID:LID (73:70). Genal area concave behind upper summit of compound eyes in lateral view. Dorsolateral angle of pronotum rounded. Horizontal surface of metapostnotum nearly half as long as metanotum (20:44); metapostnotal pits well-delimited; posterior transverse carina barely visible. Posteromedial surface of front coxa with very long spine (0.7x MOD). Posterior hind tibial spur pectinate. Hind basitarsus ~3.7x longer than broad (60:16). Outer rami of hind tarsal claws 2x as long as inner rami (20:10). Posterolateral area of S6 flat and lacking carina; marginal zone depressed.

Pubescence: Pale-yellow, plumose, erect, moderately long on lateral slopes of clypeus and supraclypeal area, paraocular and interantennal areas, pronotal lobe, mesoscutum, scutellum, metanotum, ventral surface of front and mid trochanters, ventral margin of mid femur, S1; such hairs long on frontal and vertexal areas, mesepisternum, metepisternum, posteroventral ventral surface of front femur, ventral surface of hind trochanter; very long on upper margin of lateral surface of propodeum. Genal area with off-white, plumose, erect, long hairs near proboscidial area (except for upper half with appressed hairs). Pale-yellow, erect, moderately short setae on dorsal surface of basitarsi and hind tibia; such hairs moderately long on mandible, posterior margin of basitarsi (except very long on hind basitarsus). Pale-yellow, suberect, short setae on dorsal surface of front and mid tibiae; thick setae on ventral surface of mid and hind tarsi (thickest towards distal margin). Pale-yellow, 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 restricted to marginal zone of T5); T1 also with plumose, erect, long hairs; T2–T5 also with erect, minute setae (except moderately long on T4–T5 laterally). S2 with pale-yellow, erect, short hairs, which are branched only apically. Discs of S3–S5 with minute setae concentrated posteriorly; marginal zones with a line of plumose, moderately short hairs. S6 with short setae distributed mid-longitudinally and posteriorly.

Surface sculpture: Clypeal mid-longitudinal area with a mix of fine and moderately coarse punctures; punctation irregularly spaced (i=0.5–3d); lateral area with very sparse punctures; lower 1/5 longitudinally striate; interspaces smooth. Malar area longitudinally striate on upper 2/3; substrigulate on lower 1/3. Supraclypeal area with a few moderately coarse punctures; interspaces imbricate. Paraocular area punctures crowded and moderately fine below (interspaces smooth); dense and fine above (interspaces rugulose). Frontal area densely and moderately finely punctate; interspaces rugulose. Vertexal area with minute punctures intermingled with moderately fine ones; interspaces rugose. Mesoscutum densely and moderately coarsely punctate (except coarsely and sparsely punctate mid-posteriorly); interspaces smooth. Scutellum and mesepisternum densely and coarsely punctate (except punctures crowded near scrobe); interspaces smooth. Metanotum punctures crowded and moderately fine. Metepisternum rugose above; obliquely striate medially; rugose below. Lateral surface of propodeum with very sparse fine punctures; interspaces imbricate. Upper area of vertical surface of metapostnotum smooth medially.

Metasomal terga minutely punctate; interspaces smooth. Discs of S2–S5 sparsely and moderately finely punctate (except mid-longitudinal band impunctate); lateral area densely and finely punctate; interspaces imbricate. S6 densely and moderately finely punctate.

MALE ( Figs. 36B, 36D, 36F ). As in female, except for usual secondary sexual characteristics and as follows:

Dimensions (mm): Approximate body length 8.5–9.7; head width 2.8–3.2; head length 2.3–2.5; intertegular distance 2.2–2.5; forewing length 7.1–7.8.

Colouration: F1 black. Dorsal surface of mediotarsi, wing veins pale-brown (except vein R of forewing black). Dorsal surface of tibiae and basitarsi, metasomal sterna dark-brown.

Structure: Clypeal mid-longitudinal area evenly deeply and narrowly (0.4x MOD) depressed on upper half. Malar area ~1.8x as long as basal depth of mandible (49:28). F1 slightly longer than its apical width (25:24). UID:LID (65:58). Horizontal surface of metapostnotum ~0.4x as long as metanotum (25:42); posterior transverse carina straight and interrupted medially. Posteromedial surface of front coxa without spine. Posterior hind tibial spur ciliate. Hind basitarsus ~ 5x longer than broad (62:13). Outer rami of hind tarsal claws ~1.5x as long as inner rami (13:8). S7, S8 and genital capsule as in Figs. 37A, 37B, 37C , respectively.

Pubescence: Genal area with erect hairs only. Appressed hairs on T1–T3 restricted to marginal zones and lateral areas; on T4–T5 represented by a marginal line. Setae on S3–S6 evenly distributed.

Surface sculpture: Supraclypeal area rugose. Punctation on frontal and vertexal areas difficult to discern from the rugulose integument. Mesoscutum moderately densely punctate (except sparsely punctate mid-posteriorly). Metanotum densely punctate. Mesepisternum moderately coarsely punctate; interspaces rugulose. T1–T2 finely punctate; T3–T6 with imbricate interspaces. Metasomal sterna densely and minutely punctate (except S2 sparsely punctate).

Material studied. Primary type specimen: Lectotype ♂ —“ Dr. LENDL ADOLF; NEUQUEN 1907.”. “ Colletes ; longiceps ; 1909 Friese det.”. “Type”. “Coll.; Friese”. “Zool. Mus.; Berlin”. “5”. “Zool. Mus.; Berlin”. “LECTOTYPE; Colletes longiceps ; Friese, 1910; lab. Melo, 2015”. “http://coll.mfn-berlin.de/u/; 58f9b7”. { ZMB}.

Additional specimens: ARGENTINA—Chubut: 8km N of Sarmiento , (-45.512, -69.057), 264m, 26/xi/2003, [L.Packer], 3♀♀, { PCYU}. Loma del Medio, (-46.317, -70.735), 784m, 13/xi/2005, [A.Gravel], 2♀♀, { PCYU}. Santa Cruz: 0.5km E of Los Antiguos, (-46.558, -71.591), 232m, 21/xi/2003, [L.Packer], 1♀, { PCYU} . 23km W of Las Heras , (-46.613, -69.639), 395m, 16/xi/2003, [L.Packer], 2♀♀ 2♂♂, { PCYU} . 43km E of Perito Moreno, (- 46.434, -70.364), 534m, [L.Packer], 4♂♂, { PCYU}. CHILE — Region XI: Chile Chico , (-46.550, -71.716), 218m, 21/xi/1966, [Schlinger & Irwin], 1♂, { AMNH}.

Range. Argentina (Neuquén, Río Negro, Chubut, Santa Cruz), Chile (Region XI). See also Fig. 19A .

Biogeographic distribution. Andean region: Subantarctic sub-region (Valdivian Forest province); Patagonian sub-region (Patagonian province). Southern South American species distributed at altitudes of 200–800m a.s.l.

DNA barcode. Unavailable.

Floral hosts. Unknown.

Comments. Uncommon species restricted to southern South America. Even though almost all specimens of C. longiceps available to me have been collected in Argentina, the occurrence of the species in Chile was confirmed upon examination of the specimen from Chile Chico (Region XI) that Toro compared with the male lectotype ( Toro 1999: 29). This small town is located at the north edge of the only semi-arid area in Patagonian Chile.

Figures

FIGURE 36. Colletes longiceps Friese, 1910. 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 37.Dorsal view of the male terminalia of C. longiceps. (A) S7; (B) S8; (C) genital capsule. Scale bars = 1mm.

FIGURE19. Geographic distribution by Colletes species.(A) C. coquimbensis n. sp. and C. longiceps; (B) C.cyanescens; (C) C.vicugnensis and C. flaminii. Scale bars approximately 300 km.