Cardiacephala secunda Hennig, 1935

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 : 447-448

Cardiacephala secunda Hennig, 1935

( Figs. 82–85 )

Cardiacephala secunda Hennig, 1935: 52 .

Description: Body length 6 mm, wing 4 mm. Palpus mostly dark brown, white on outer face. Clypeus black with sparse and pale microsetulae. First flagellomere dark brown covered with pale microsetulae. Frontal vitta dark brown and with a black spot between the anterior pair of frontal setae. Fronto-orbital plates shiny. Row of katepisternal setae black. Mid and hind femur narrowly yellow basally and apical third white. Fore tarsus dark brown with gold/whitish pubescence ventrally at base of tarsomere one. Oviscape black. Epandrium yellow.

Head: Palpus broadened basally and gradually tapering to apex. Clypeus short, length less than half of width. Two frontal setae. Frontal vitta with a narrowed depression centrally, reaching ocellar triangle. Inner vertical seta insertion flat, without tubercle. Vertex rounded. Paracephalon smooth, without swelling (not extending beyond the vertex). Line of black supracervical setae strong.

Thorax: Mesonotum with white pruinosity. Scutellum upturned, triangular. Femora with sparse black setulae. Mid and hind tibia flattened, but sulcus on outer face weak. Wing mostly black with rounded hyaline spots, discal band with four hyaline spots and apical with three ( Fig. 82, 84 ). 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 brownish setulae. Female abdomen: Single spermathecal duct uniformly thick, ending in a sac-like spermatheca (tapered basally and distally swollen). Paired spermathecal duct divided into a narrow basal half and a broader distal half. Paired spermathecal duct stems thin and smooth in basal third, followed by a small rounded swelling and a small appendix ( Fig. 83 ). Paired spermathecae spherical, somewhat flattened basally and deeply invaginated from apex to base. Male abdomen: Ejaculatory apodeme bigger than epandrium and with a broad blade, wider than sperm pump ( Fig. 85 ). Phallapodeme extending to anterior limit of hypandrium. Distiphallus long, longer than epandrium, ending in a phallic bulb, phallic bulb subequal in length and width.

Type material: Holotype (1 ♀, MLUH, not examined): ECUADOR. Cordillera. Date and collector not cited.

Material examined: ECUADOR. Pichincha, Maquipucuna Biol. Res., river trail, 1200 m, 0º7’34” N 78º37’57” W, 28.IV.2002, S. A. Marshall (3 ♀, 5 ♂, DEBU 00178603, DEBU 00178617, DEBU 00178628, DEBU 00178630, DEBU 00178631, DEBU 00178638, DEBU 00195845, DEBU 00195848); Pichincha, Maquipucuna Biol. Res., river trail, 1200 m, 0º7’34” N 78º37’57” W, 28.IV.2002, S. A. Marshall (1 ♂, DEBU 00178614, sequence MYCRO 261–16); Pichincha, Maquipucuna Biol. Res., main trail, 1500 m, 27.IV.2002, S. A. Marshall (1 ♀, DEBU, sequence MYCRO 260–16); Pichincha, Maquipucuna Biol. Res., river trail, 1200 m, 0º7’34” N, 78º37’57” W, 27.X.1999, S. A. Marshall (1 ♀, DEBU 00100042); Pich., Tinalandia, 800 m, II.1983, Malaise trap, M. Sharkey (1 ♀, DEBU).

Distribution: Ecuador.

Comments: Cardiacephala secunda is one of the most distinctive species in Cardiacephala due to the striking black wing with rounded hyaline spots (four on discal and three on apical band). Hennig (1934: 107, Fig. 2 ) provides an illustration of a C. secunda head.

Figures

FIGURES 82–85. Cardiacephala secunda. 82, female, dorsal view; 83, female genitalia, ventral view; 84, male, lateral view; 85, male genitalia, lateral view.

FIGURES 2–4. Cardiacephala acuminata. 2, female, anterodorsal view; 3, female, lateral view; 4, female genitalia, ventral view.