Chorophthalmyia brevicornis Lindner, 1964

Pujol-Luz, José Roberto, Lopes, Welinton Ribamar & Viana, Gustavo Glória, 2016, Description of the puparium and redescription of the imagoes of Chorophthalmyia brevicornis Lindner (Diptera: Stratiomyidae), Zootaxa 4121 (5), pp. 583-588 : 584-587

Chorophthalmyia brevicornis Lindner, 1964

Chorophthalmyia Lindner, 1964: 6 . Type species, Chorophthalmyia brevicorni s Lindner, by monotypy. Lindner, 1969: 5 —correct original spelling; Woodley (2001: 92) —catalogue.

Chorophthalmus: Lindner, 1964: 18 , 22—incorrect original spelling.

brevicornis Lindner.

Chorophthalmus brevicornis Lindner, 1964: 18 . HT ♂ [SMS]: Brazil: Santa Catarina, Nova Teutônia.

Material examined. Five puparia (1 ♂ and 4 ♀): Brazil, State of Rio de Janeiro, São Roque, Paraty, G.G. Viana col., 09.iv.2000 (emerged 10.v.2000: 1 ♂, UNB 015778 and 1 ♀, UNB 015779); (emerged 12.v.2000: 1 ♀, UNB 015777); (emerged 15.v.2000: 1 ♀, UNB 015776); (emerged 17.v.2000: 1 ♀, UNB 017775).

Records of geographical distribution. NEOTROPICAL: Costa Rica [cf. Woodley, 2009], Brazil: Santa Catarina and Rio de Janeiro (new record).

Puparium: Length 2.2–2.4 mm, body flattened dorsoventrally with head, three thoracic segments, and eight abdominal ( Figs. 2, 3, 4 ). Cuticle with usual mosaic appearance ( Figs. 2 , 11–14 ). Chromatic pattern yellowishbrown with dark punctuations between the body segments and the arched lateral margins ( Fig. 2 ). Head. Prominent, sub-triangular, flattened, longer than wide, parallel to the longitudinal axis of the body; labrum triangular. Antenna (a) short, dorsal-laterally rising at anterior part of head ( Figs. 5 , 9 ). Eyes prominent ( Fig. 9 ), rounded, arising at the basal third of the head capsule. Mandibular-maxillary complex with well developed ( Fig. 10 ), cylindrical brushes almost as long as the labrum in dorsal view ( Figs. 9, 10 ). Chaetotaxy ( Figs. 5, 6 ): one pair of lateral setae (L), one pair of dorsolateral setae (DL), two pairs of clypeofrontal setae (CF), three pairs of ventrolateral setae (VL) and three pairs of spine-like ventral setae (V). Thorax: Uniformly yellowish brown with dark punctuations between the body segments and the arched lateral margins; prothorax ( Figs. 3–6 ) sub-rectangular with anterior spiracle (as) prominent; mesothorax and metathorax rectangular in shape with curved side edges. Chaetotaxy ( Figs. 5, 6 ): prothoracic in dorsal view with one pair of dorsolateral setae (DL), two pairs of anterodorsal setae (AD), the outer being longer and three pairs of dorsal setae (D). In ventral view the prothorax with one pair of ventrolateral setae (VL) and two pairs of ventral setae (V), the outer being double. Mesothorax and metathorax with three pairs of dorsal setae (D) and one pair of lateral setae (L). In ventral view, mesothoxax and metathorax with one pair of ventrolateral setae (VL) and two pairs of ventral setae (V) ( Figs. 3, 4 ). Abdomen. In dorsal view ( Fig. 3 , 7 ) with segments 1–7 similar in shape with one pair of lateral setae (L), one pair of dorsolateral setae (DL) and three pairs of dorsal setae (D). In ventral view ( Figs. 4 , 8 ), segment 1–7 with two pairs of ventrolateral setae (VL) and three pairs of ventral setae. Sternal patch (sp) present on the sixth segment ( Figs. 8 , 11–12 ), elliptical in shape and distinguished from the mosaic appearance of the pupal integument ( Figs. 11–12 ). Abdominal segment 8 in dorsal view ( Figs. 7 , 13 ) semi-circular with a pair of dorsocentral setae (DC); cleft of breathing chamber or posterior spiracular opening (pso) placed dorsally on anal segment, rounded for some plumose setulae; two pairs of lateral bristles (L); a pair of subapical bristles (SAP) and a pair of apical bristles (AP). In ventral view ( Figs. 8 , 14 ) shows five pairs of ventral setae (V). Anal slit (asl) tumescent, as longer than the length of segment 8 ( Figs. 8 , 14 ).

Adults. Male: Body length: 1.4mm; wings length: 1.2 mm. Head. Spherical, dark brown. Ocellar triangle, black. Eyes holoptic and bare. Occiput blackish-brow and bare. Frons and face blackish-brow and bare, facial ridge covered with silvery hairs, face not produced. Antennae light-brownish, flagellum globular, tapering with 5 flagellomeres, densely pilose, arista white-snow, plumose, longer than antennal complex. Thorax. Shiny black, densely covered with short silvery hairs, forward transversal suture and brass hairs backwards transversal suture; with 5 inconspicuous silvery stripes, inflated and anteriorly narrowed; scutellum black, elliptical with the posterior margin armed with several short spines, moderately flattened. Wing ( Fig. 1 a) hyaline covered with a short brownish-black microtrichia; venation characteristic of Pachygastrinae , M3 absent, section of CuA1 forming posterior margin of discal medial cell (dm), almost trapezoidal, placed distally to the middle ( Fig. 1 a). Legs with dense pilosity, coxae and femora predominant black, tibia and tarsus brownish-yellow ( Fig. 1 a). Abdomen. Shiny black, unpatterned, cushion-like inflated or globular, shorter than thorax, covered with short black and silvery hairs. Terminalia (length 8µm, width 5µm). Epandrium semicircular; tergite 10 (hypoproct) subtriangular; cerci margined with long spine-like bristles ( Fig. 15 ); hypandrium (hypd) subquadrangular in dorsal view; gonocoxite subquadrangular, with gonocoxal apodeme (apod goncx) parallel and rounded ends; posterior margin of the hypandrium is short and slightly arched; gonostyle (gonst) simple, rounded, concave medially (spoon shaped) and arched toward the midline ( Fig. 16 ); aedeagus with the distal half trifid; lobes of the aedeagus free, projected beyond the distal end of gonocoxite ( Fig. 17 ).

Female: Differs from male in the following aspects: body length: 1.4–1.8mm; wing length: 1.2–1.4 mm; eyes dichoptic ( Fig. 1 b), silvery pruinosity on fronto-orbital plates around the eyes ( Fig. 1 a-b), thorax with 5 inconspicuous silvery stripes but sometimes unpatterned; cerci two-segmented, cylindrical, and slender.

Figures

FIGURES 1 - 4. Chorophthalmyia brevicornis. (1 a) Female in lateral view (1.4 mm); (1 b) Female head in frontal view; (2) Puparium in dorsal view (2.2 mm); (3) Puparium in dorsal view, showing setae pattern, (4) Puparium in ventral view, showing setae pattern. Scale bar = 500 µm (Figs. 1 a, 2, 3 4). Scale bar = 200 µm (Fig. 1 b).

FIGURES 9 – 14. Chorophthalmyia brevicornis. (9) head and thoracic segment 1, in ventral view; (10) Anterior part of head in ventral view, sublabral appendage and maxillary palpi; (11) sternal patch on abdominal segment 6, in ventral view; (12) sternal patch in detail. (13) abdominal segment 8 in dorsal view; (14) abdominal segment 8 in ventral view. Scale bar = 100 µm (Figs. 9, 11, 13, 14). Scale bar = 10 µm (Figs. 10, 12).

FIGURES 5 – 8. Chorophthalmyia brevicornis. (5) head and thoracic segment 1, in dorsal view; (6) head and thoracic segment 1, in ventral view; (7) abdominal segments 6, 7 and 8, in dorsal view; (8) abdominal segments 6, 7 and 8, in ventral view. Scale bar = 500 µm.

FIGURES 15 – 17. Chorophthalmyia brevicornis. (15) epandrium (tergite 9), tergite 10 and cerci, in dorsal view (total length 8 µm); (16) hypandrium, gonocoxites and gonostyles, dorsal view (total width 5 µm); (17) aedeagus trifid.