Acrocephalomyia zumbadoi Ibáñez

Ibáñez-Bernal, Sergio & Hernández-Ortiz, Vicente, 2012, The new genus Acrocephalomyia, and a new species of Ropalomera from Costa Rica, with additional records for other Mesoamerican species (Diptera: Ropalomeridae), Zootaxa 3478, pp. 553-569 : 554-556

Acrocephalomyia zumbadoi Ibáñez –Bernal & Hernández–Ortiz, sp. nov.

Figs. 1–9

Type-locality. COSTA RICA: GUANACASTE, West side of Volcán Orosi, Estación Maritza, 600 m. Etymology. This species is dedicated to our colleague and friend Manuel Zumbado, in recognition to his contribution to the knowledge of the Costa Rican Diptera .

Description (male and female). Head: trapezoidal in frontal view ( Fig. 2 ), triangular in lateral view ( Fig. 1 ). Frons broad and flat, about 1.25 times as wide as eye width, lateral margins parallel and frontal margin rounded, strongly exceeding the level of the anterior margin of the eyes ( Fig. 4 ); Vertex sunken, without ocelli or ocellar tubercle ( Fig. 2 ). Ocellar, postocellar and inner vertical bristles absent ( Figs. 2, 4 ). Outer vertical bristles strongly divergent, with group of small setulae surrounding bristle base and row of 5–7 small frontal setulae reaching level of anterior margin of eye ( Fig. 4 ). Antennae brown, originated below a shelf formed by the produced frons; scape and pedicel covered with some black setulae, especially on dorsal surface and along distoventral surface of pedicel; flagellum subquadrate, as long as combined length of scape and pedicel; arista dorsobasal to medial, bare ( Fig. 3 ). Gena postero–ventrally extended, with two vertical strips of silver pollinosity and a few delicate setae in a loose patch near the frontal and ventral margins ( Fig. 1 ). Face flat, without central tubercle, covered with dark silvery pollinosity ( Figs. 2, 4 ).

Thorax: Scutum very elongated, length two times maximal width, with two pairs of silvery pollinose strips, a sublateral pair extended from the postpronotal lobe to the scuto-scutellar suture, and a dorsocentral pair connected anteriorly and reaching the posterior margin; surface covered with short setulae. Scutum with two notopleurals, one postsutural supra-alar, one postalar, one intra-alar, and one intra-postalar. Scutellum subtriangular and flattened dorsally, length about 1.25 times basal width, with short setulae, and dorsal surface with silver pollinosity; marginal or discal scutellar bristles absent, except for one pair of short, strong apical bristles, which are inserted very close to each other ( Fig. 4 ). Subscutellum dark with silver pollinosity; pleuron without bristles, excluding patches of weak setulae on anepisternum, anepimeron and katepisternum, with silvery pollinose strip extending from proepisternum toward katatergite; posterior spiracle with only one small seta ( Fig. 5 ). Wings evenly fumose, length about 3 times maximum width; tegula with three outstanding long setae ( Fig. 6 ). Legs ( Figs. 7–9 ) with femora not especially enlarged, fore femur with anteroventral row of 7 spines and 3 posteroventral bristles; mid femur with anterior row of 8 spines and posteroventral row of 5 spines; hind femur with anteroventral row of 6 spines and posteroventral row of 4 spines. Fore tibia with dorsal keel and preapical dorsal bristle, with some strong setae dorsally; with dorsoapical patch of silvery-yellow pollinosity from the insertion of preapical dorsal bristle to apex; mid tibia cylindrical, with dorsal keel, one preapical anterodorsal bristle and 4 ventroapical spines; hind tibia with dorsal keel, one preapical dorsal, one preapical anterior and one preapical posterior setae; ventral surface setulose. Tarsomere 1 with white pollinosity, other tarsomeres black.

Abdomen: Terga 1–5 black in ground color, evenly covered with black short setae and sparse yellowish pollinosity. Male epandrium shinning black, truncate in lateral view, cerci short. Male and female terminalia not dissected for description to preserve the type-specimens.

Measurements. Holotype 3: Wing length 10.0 mm, wing width 2.6 mm; gena height 0.8 mm; eye height 1.5 mm; frons length 1.4 mm, width 1.5 mm; scutum length 4.0 mm, width at supra-alar setae insertion level 2.8 mm. Allotype Ƥ: Wing length 9.3 mm, wing width 2.5 mm; gena height 0.7 mm; eye height 1.6 mm; frons length 1.6 mm, width 1.4 mm; scutum length 3.8 mm, width at supra-alar setae insertion level 2.5 mm.

Material examined (verbatim). Holotype 3: COSTA RICA: GUANACASTE: lado oeste Volcán Orosi, Estación Maritza, 600 m, august-1990, L-N-326900, 378000, Curso parataxónomos, col. Allotype Ƥ: 8 km SO Cuajiniquil, Est. Murciélago, 100 m, 7–25/03/1994, L-N-320300-347200 (2794), F. Quesada, col. Paratype 3 (damaged): HEREDIA: Sarapiquí, Z. P. La Selva, Est. Biol. La Selva, 0–100 m, 14–15/03/2001, LN268000–535600 (62060), D. Wagner, col. ( INBIO).

Figures

FIGURES 1 – 4. Acrocephalomyia zumbadoi sp. nov. Holotype 3. 1) Head, lateral view; 2) Head, frontal view (right antenna not drawn); 3) Antenna, lateral view; 4) Head and thorax, dorsal view, showing chaetotaxy and dorsal pattern. Scale in millimeters.

FIGURES 5 – 9. Acrocephalomyia zumbadoi sp. nov. Holotype 3. 5) Thorax, lateral view; 6) Wing; 7) Front leg, posterior view; 8) Mid leg, anterior view; 9) Hind leg, anterior view. Scale in millimeters.