Megachile (Aporiochile) tricosa Cockerell

Gonzalez, Victor H., Griswold, Terry & Engel, Michael S., 2018, South American Leaf-Cutter Bees (Genus Megachile) Of The Subgenera Rhyssomegachile And Zonomegachile, With Two New Subgenera (Hymenoptera: Megachilidae), Bulletin of the American Museum of Natural History 2018 (425), pp. 1-73 : 1-73

Megachile (Aporiochile) tricosa Cockerell ,

resurrected status

Figures 4B , 5D , 8–10

Megachile tricosa Cockerell, 1927: 21 (holotype ♂, examined, USNM 29092: Tumupasa, La Paz, Bolivia). Raw, 2002: 6 (placement in Austromegachile Mitchell ). Moure et al., 2007: 992 (synonymy under M. urbana Smith ).

Megachile turbulenta Mitchell, 1930: 255 (neotype ♂ [here designated], NCSU 0006818: Buenavista, Bolivia). Mitchell, 1943: 667

(placement in Austromegachile ). Moure et

al., 2007: 992 (placement in Rhyssomegachile

Mitchell). New synonymy.

DIAGNOSIS: As for the subgenus (above).

REDESCRIPTION: Holotype. Male: Total body length 8.9 mm; forewing length 7.8 mm; head width 3.6 mm. Head 1.4× wider than long; inner orbits of compound eyes slightly converging below; intertorular distance 1.7× torulorbital distance; interocellar distance 1.6× OD, 0.7× ocellocular distance; ocelloccipital distance 3.2× OD, 1.4× ocellocular distance; scape 2.5× longer than broad, pedicel about as long as F1, each about as long as broad, F2 1.6× longer than F1, longer than broad as in remaining flagellomeres, distalmost flagellomere longest, apically flattened, not expanded. Genital capsule and associated terga and sterna as in figure 9.

Body color black, except dark reddish brown on tegula, legs, and metasoma. Wings slightly brownish, darker on radial cell apically, first submarginal, and marginal cells; veins and pterostigma dark brown.

Pubescence light reddish yellow, except: white on mesepisternum, coxae, trochanters, and sterna; dark brownish gray on discs of T2–T4. Clypeus sparsely covered by setae (integument largely visible among setae) on basal three fourths, densely covered by setae (integument not visible among setae) on apical one fourth. Meso- and metabasitarsi with short setae along anterior margin, at most as long as maximum basitarsal width. T1 with long (1.5–2.0× OD), erect setae; T2–T4 with shorter (≤OD), appressed setae sparsely covering integument; sides of T2 and T3, depressed marginal zone of T4, and T5 and T6 densely covered by appressed, short, minutely branched setae (integument not visible among setae); S1–S4 with long (1.0–1.5× OD), dense, white apical fasciae (integument not visible among setae).

Clypeus smooth and shiny with smaller, sparser (1.0–3.0× PW) punctures on disc than on sides; supraclypeal area contiguously punctate, punctures small as on clypeal disc; frons coarsely and contiguously punctate, surface among punctures angular; paraocular areas with similar punctation as on frons, punctures smaller; vertex smooth and shiny with coarse, spaced (≤1.0× PW) punctures smaller than those on frons; upper gena with shallower, punctures than on vertex. Pronotum weakly imbricate with smaller, sparser, shallower punctures than on mesoscutum; mesoscutum weakly imbricate, somewhat dull, punctures separated by 1.0–2.0× a puncture width on disc, contiguous or nearly so along lateral and posterior margins; mesoscutellum and axilla dorsally with punctures slightly denser than on disc of mesoscutum; mesepisternum smooth and shiny with punctures larger (1.5×) than on mesoscutum, separated at most by a puncture width, punctures becoming smaller and closer dorsally; metepisternum and propodeum imbricate, punctures oval, faint, spaced (1.0–2.0× PW) on metepisternum, about as large as those on mesoscutum; lateral surface of propodeum with oval, smaller, fainter, closer punctures than on metepisternum, posterior surface of propodeum with widely separated (2.0–4.0× PW) punctures; metanotum finely and minutely (≤1.0× PW) punctate; legs weakly imbricate to smooth and shiny, coarsely and densely (≤1.0× PW) punctate, punctures larger and sparser on hind legs. Terga weakly imbricate to smooth and shiny, minutely and densely (1.0–1.5× PW) punctate, punctures becoming coarser and denser toward apical terga, T4 and T5 with depressed, smooth, shiny, brown apical margins; sterna strongly imbricate, with coarser, sparser punctures than on terga.

Female: Unknown.

HOLOTYPE ( M. tricosa ): ♂, Tumupasa, Bolivia, Dec., W.M. Mann/Mulford Biol. Expl. 1921-1922/ Megachile tricosa Ckll. Type/Type No. 29092 U.S. N.M. ( USNM).

NEOTYPE ( M. turbulenta ): ♂, Buenavista, Dep. Sta. Cruz, Bolivia, 450 m. h./QR barcode NCSU 0006818/ ♂ Megachile turbulenta Mitchell , Paratype (greenish label)/ ♂ Neotype Megachile turbulenta Mitchell , des. V.H. Gonzalez, M.S. Engel, & T. Griswold 2016 ( NCSU). Megachile turbulenta Mitchell was described from two male specimens, the holotype of which was lost during World War II (see Material and Methods, above). To stabilize this name, we here designate as neotype the sole male paratype in accordance with Article 75 of the ICZN (1999).

ADDITIONAL MATERIAL EXAMINED (n = 7♂♂): Bolivia: 1♂, Bolivia, Guanay, Uyapi- X-95, Gerlach/AMNH_IZC 00290233 (AMNH); 1♂, ut supra (AMNH); 1♂, Region Chapare, Bolivia, 400 m, VIII-1950, Zischka/ SEMC 1176839 ( SEMC). Brazil: 1♂, Colonia rio Bronco, Obido, Para, Brazil, x-1953, J. Bpozllno/ COLECÃO CAMPOS SEABRA/ NCSU 0004717; 1♂, Brazil: Matto Grosso: 12°31′N, 55°37′W, Sinop. Oct. 1975 (AMNH); 1♂, Matto Grosso: Vila Vera, 55°30′ long., 12°46′ lat., Oct. 1973, M. Alvarenga (AMNH). Peru: 1♂, Peru, Madre de Dios, Pakitza Bio. Sin., Reserved Zone, Manu National Park, 317 m, 11°56′41″S, 71°17′0″W, 16 Oct 2000; R. Brooks, PERU 1B00 008, ex: wet area near stream/SM0255772 ( SEMC).

DISTRIBUTION: Bolivia (La Paz, Santa Cruz), Brazil (Pará), Peru (Madre de Dios) (fig. 10).

COMMENTS: Aside from a slightly larger body size of the neotype of M. turbulenta when compared with the holotype of M. tricosa , we did not find significant differences in the punctation, pubescence, or shape of the preapical carina of T6.

Figures

FIGURE 4. Some morphological features used in the phylogenetic analysis. A–C. Punctation of mesoscutum. D–F. Pubescence of outer surface of female protarsi. A. Megachile (Rhyssomegachile) simillima Smith (female holotype). B. M. (Aporiochile) tricosa Cockerell (male holotype). C. M. (Rhyssomegachile) guayaqui Schrottky (female neotype). D, E. M. (Rhyssomegachile) kartaboensis Mitchell (female holotype). F. M. (Zonomegachile) moderata Smith (female holotype).

FIGURE 5. Some morphological features used in the phylogenetic analysis.A, B. Pubescence of apex of female sixth sternum. C, D. Pubescence of male clypeus. E–G. Modifications of the male mandible and hypostomal area. H. Modifications of male protarsus.I. Pubescence of posterosuperior surface of male metafemur.A. Megachile (Creightonella) cognata Smith (Uganda, Tororo, SEMC 1177151).B, E, G. M. (Acentron) albitarsis Cresson (♀, Costa Rica, San José, SEMC 1177780; ♂, Costa Rica, Guanacaste, SEMC 1177784). C. M. (Chalepochile) ardua Mitchell (male holotype). D. M. (Aporiochile) tricosa Cockerell (male holotype). F, H. M. (Zonomegachile) gigas Schrottky (Brazil, Mato Grosso, ANSP 4133). I. M. (Chalepochile) tacanensis Moure (Argentina, Tucumán, SEMC 1184302).

FIGURE 8. Male holotype of Megachile (Aporiochile) tricosa Cockerell. A. Dorsal habitus. B. Lateral habitus. C. Dorsal view of T5 and T6.

FIGURE 9. Male of Megachile (Aporiochile) tricosa Cockerell (Peru, Madre de Dios, SEMC 255772). A, B. Seventh tergum in dorsal and ventral views. C. Fifth sternum. D. Sixth sternum. E. Eighth sternum. F–H. Genital capsule in dorsal, ventral, and lateral views.

FIGURE 10. Collection localities for Megachile (Aporiochile) tricosa Cockerell, M. (Chalepochile) ardua Mitchell, and M. (Chalepochile) tacanensis Moure.