Cardiacephala lobulosa, Ferro & Marshall, 2018

Ferro, Gustavo Borges & Marshall, Stephen A., 2018, A revision of the Neotropical ant-like genus Cardiacephala Macquart, including Plocoscelus Enderlein syn. nov. (Diptera: Micropezidae, Taeniapterinae), Zootaxa 4429 (3), pp. 401-458 : 431

Cardiacephala lobulosa new species

( Figs. 46–49 )

Description: Body length 8 mm, wing 5 mm. Palpus mostly dark brown, white on outer face. Clypeus black with pale microsetulae. First flagellomere dark brown covered with pale microsetulae. Frontal vitta dark brown, anterior portion with a black spot. Fronto-orbital plates black and shiny. Postpronotal lobe black and shiny. Row of katepisternal setae brownish. Legs black. Hind femur narrowly white basally. Fore tarsus dark brown with gold/ whitish pubescence ventrally at base of tarsomere one. Oviscape black, apex yellowish. Epandrium dark brown.

Head: Palpus broadened basally and gradually tapering to apex. Clypeus short, length less than half of width. Frontal vitta slightly depressed in the center, depressed area reaching ocellar triangle. Two frontal setae. Paracephalon smooth, without swelling (not extending beyond the vertex). Inner vertical setae inserted in small tubercles. Vertex flattened. Supracervical line of setae black.

Thorax: Mesonotum with white pruinosity. Posterior notopleural seta insertion slightly protuberant. Scutellum upturned, triangular. Femora with sparse pale setulae. Mid and hind tibia flattened, sulcus on outer face very pronounced and curved ( Fig. 48 ). Wing with stigmatal and discal bands, apex clear with a dark and narrow preapical pigmentation. Crossvein r-m clear. R4+5 and M1+2 ending separately in wing margin. A1+CuA2 as long as CuA2. Female cervical sclerite smooth, without swelling.

Abdomen: Tergites with pale microsetulae. Female abdomen: Oviscape with sparse pale microsetulae. Single spermathecal duct apically broad, basal half tapered. Single spermatheca cylindrical. Paired spermathecal duct delimited by a narrow basal half and a broader distal half with an apical ring-like swelling. Paired spermathecal duct stems smooth basally and with a large preapical rounded swelling, at least two times bigger than the spermathecae ( Fig. 47 ). Paired spermathecae small and spherical. Male abdomen: Ejaculatory apodeme bigger than epandrium and with a broad blade, wider than sperm pump. Phallapodeme extending to anterior limit of hypandrium. Distiphallus long, longer than epandrium, ending in a phallic bulb, phallic bulb subequal in length and width ( Fig. 49 ).

Type material: Holotype: ECUADOR. Napo, Res. Ethnica Waorani, 1 km S Onkone Gare Camp, Trans. Ent. 220 m, 00º39’10” S 76º26’ W, 21.VI.1994, T. L. Erwin et al. (1 ♂, USNM 00053590). Paratypes: BRAZIL. Amazonas, Itacoatiara, Madereira Mil, Susp alta área P. 21–26.XI.1999, J. F. Vidal (2 ♂, INPA); Amazonas, Itacoatiara, Madereira Mil, Malaise alta área P, 21–26.XI.1999, J. F. Vidal (1 ♀, DEBU 01086321, INPA); ECUADOR. Napo, Res. Ethnica Waorani, 1 km S Onkone Gare Camp, Trans. Ent. 220 m, 00º38 S 76º36’ W, 23.I.1994, T. L. Erwin et al. (1 ♀, USNM 00053965).

Other Material examined: BOLIVIA. Heath River, Wildlife Centre, Yellow pans, 5.V.2000, Paiero & Kits (2 ♀, 1 ♂, DEBU); Parc National Amboro, 4–9.XI.2002, Richard Leschen (2 ♀, USNM); Santa Cruz, Hotel Fauna y Flora, 500–4000m, 17º37’S 63º37’W, flight intercept trap, 1–10.XI.2002, Richard Leschen (5 ♀, USNM); COLOMBIA. Amazonas, PNN Amacayacu Matamata, 3º23’S 70º06’W, 150m, 25.VI.2001, M. 1888, A. Parente (1 ♀, USNM); ECUADOR. Napo, Jatun Sacha Biol. Res. 6 km E Misahualli, 1º4’ S 77º37’ W, 450 m, 2.V.2002, M. Buck (1 ♀, DEBU 00177953); Napo, Res. Ethnica Waorani, 1 km S Onkone Gare Camp, Trans. Ent., 220 m, 00º39’10” S 76º26’ W, 5.II.1994, T. L. Erwin et al. (1 ♂, USNM); Prov. Orellano, Rio Tiputini, 0º38.2’S 76º8.9’W, 12–26.VIII.1999, W. N. Mathis, A. Baptista, M. Kotrba (1 ♂, USNM); Prov. Orellano, Yasuni Natl. Pk, Yasuni research stn., 0º40’50” S 76º24’2” W, 250 m, 28.IV–8.V.2009, S. A. Marshall (2 ♂, DEBU); PERU. Loreto, Teniente Lopez, 1.5 km N. 230–305 m, FIT. 22.VII.1993, R. Leschen (1 ♀, DEBU 00138317); Loreto, Teniente Lopez, 1.5 km N. 230–305 m, FIT, 24.VII.1993, R. Leschen (1 ♀, DEBU 00138305).

Distribution: Bolivia, Brazil, Colombia, Ecuador, Peru.

Etymology: The specific name C. lobulosa derives from the Latin “lobus”, referring to the small tubercle at the base of the inner vertical seta.

Comments: C. lobulosa is one of the four species in Cardiacephala characterized by prominent flattened mid and hind tibiae. It also has small tubercles on the inner vertical setae insertions like those of C. aspera , but the paracephalon is not swollen. Futhermore, the female genitalia are distinctive, with a large rounded swelling on the paired spermathecal duct (even bigger than the paired spermathecae).

Figures

FIGURES 46–49. Cardiacephala lobulosa. 46, female, dorsolateral view; 47, female genitalia, ventral view; 48, male, dorsolateral view; 49, male sternite 5 and genitalia, ventral and lateral view, respectively.