Brachylinga ornatifrons (Kröber)

Webb, Donald W. & Metz, Mark A., 2006, A Revision of the New World Genera Brachylinga Irwin and Lyneborg and Lysilinga Irwin and Lyneborg (Diptera: Therevidae: Therevinae) with the Description of a New Genus, Elcaribe Webb, Zootaxa 1288 (1288), pp. 1-241: 102-104

publication ID

1175­5334

publication LSID

lsid:zoobank.org:pub:FAA70D1F-49C8-40FC-9D96-CCF8C017E6BB

persistent identifier

http://treatment.plazi.org/id/7E0087EE-5D33-FFFC-374E-FD593309AF2E

treatment provided by

Felipe

scientific name

Brachylinga ornatifrons (Kröber)
status

 

Brachylinga ornatifrons (Kröber)  

( Figs. 18, 41, 64, 87, 110, 133, 156, 179, 200, 213)

ornatifrons Kröber (1911: 499   male key, 519 orig. desc.; 1913:33 dist.; 1928a:6 dist., 10 male key) ( Psilocephala   ); Metz et al. (2003:22 comb. change) ( Brachylinga   ). Type locality Peru, Arequipa. Holotype male (MEI 134208) in SMTD.

Diagnosis

Brachylinga ornatifrons   is taxonomically associated with B. laculata   in possessing setae on the katepisternum; in having the halter knob dark reddish brown; and in having the foretibia dark yellow with the apex dark reddish brown. Brachylinga ornatifrons   differs from B. laculata   in having the wing cell m 3 closed, petiolate; tergite 8 ( Fig. 18) narrow medially; and the gonocoxite in dorsal view ( Fig. 64) lacking a gonocoxal bridge.

Redescription of male

Variation (n=7).

Body length 5.3–5.8, 5.5 mm.

Head. Ommatidia smaller ventrally and laterally. Frons pruinescence white, dark brown dorsally (generally darker laterally); setae dark brown, short. Antenna with scape dark brown, pruinescence gray, pedicel dark yellowish brown, first flagellomere dark yellowish brown, second and third flagellomeres dark brown; setae on scape dark brown, short. Parafacial pruinescence white. Maxillary palpus dark yellow; setae yellow. Genal setae white. Occipital setae white becoming lanceolate appressed dorsally. Postocular macrosetae dark reddish brown.

Thorax. Macrosetae dark reddish brown, 3 np, 1 sa, 1 pa, 0–2 dc, 2 sc. Mesonotum dull brown; setae black, elongate intermixed with dull gold lanceolate appressed setae becoming whitish gold laterally. Pleuron and scutellum dark reddish brown, pruinescence gray; setae white on propleuron, anepisternum, katepisternum, metanepisternum, laterotergite, and scutellum. Wing. Membrane pale smoky brown, veins brown; pterostigma pale brown; cell m 3 closed, petiolate. Halter brown. Legs. Coxa setae white, present on posterior surface of midcoxa; macrosetae dark reddish brown. Femora dark brown, pruinescence white; ventral setae white, elongate intermixed with dark brown setae on fore­ and midfemora; av dark brown 0–1:0:3–4, pv 0:0:1–3. Tibiae dark yellow, dark brown apically. Tarsomeres 1–2 dark yellow, dark brown apically; 3–5 dark brown.

Abdomen. Dark brown, pruinescence white; dorsal setae white, appressed; lateral setae white, elongate. Terminalia   (MEI 045955) reddish brown. Tergite 8 ( Fig. 18), median length thick (0.05 mm); setae dark yellow, continuous across posterior margin. Sternite 8 ( Fig. 41) rectangular, sides rounded, posterior margin emarginate. Epandrium ( Fig. 18), sides tapered apically; setae dark yellow. Cercus ( Fig. 18) ending basal to apex of hypoproct. Hypoproct ( Fig. 18), posterior margin emarginate, ending distal to apex of cercus. Gonocoxite ventral view ( Fig. 41), broad, rectangular, medial margin sinuate, tapering apically to broad, truncated apex; setae dark yellow, black macrosetae along apical margin; dorsal view ( Fig. 64), posteromedial lobe small, rounded, gonocoxal bridge absent; lateral view ( Fig. 87) short, rectangular, posterior margin truncate; ventral lobe ( Fig. 41) with ventral spines. Gonostylus ( Fig. 110), basodorsal lobe moderately large; ventral margin straight, setae dark yellow, not directed apically in distinct tuft; fine, short spines absent laterally. Aedeagus with dorsal apodeme ( Fig. 133) quadrate, posterolateral margin rounded; ventral apodeme ( Fig. 156) tapered anteriorly, not extending to anterior margin of dorsal apodeme; distiphallus dorsal view ( Fig. 133) tapered apically, lateral view ( Fig. 179) broadly curved ventrally, apicolateral spines absent; ejaculatory apodeme ( Fig. 133), anterior margin truncate.

Female

Similar to male except for following.

Variation (n=3).

Body length 4.9–6.7, 5.6 mm.

Head. Frons dull brown, yellowish brown ventrolaterally with small, brown circle dorsolaterally; setae dark reddish brown, short, dorsally. Antenna dark brown, scape and pedicel pruinescence gray. Parafacial pruinescence gray.

Thorax. Macrosetae 3 np, 1 sa, 1 pa, 2 dc, 2 sc. Mesonotum dull brown; setae black, elongate intermixed with dull white, lanceolate, appressed setae. Legs. Anteroventral macrosetae 0:0:3, pv 0:0:3.

Abdomen. Dark reddish gray, pruinescence light gray, denser posterolaterally on tergites 1–4 and across posterior half of tergites 5–7; dorsal and lateral setae dark reddish brown, short with whitish gold, elongate, appressed setae across posterior margin of tergites 1–4. Terminalia   (MEI 088214). Furca ( Fig. 200) quadrate; length 0.44 mm, width 0.16 mm; anterolateral projection short. Common duct ( Fig. 200) longer than furca. Spermathecal duct ( Fig. 200) diverging anteriorly.

Immature Stages. One female (MEI 045901) has been reared from larvae collected at Lambayeque, University Nacional Vedro Luis Gallo from soil; 1♂ (MEI 045900) and 1♀ (MEI 088214) have been reared from larvae collected at Lambayeque from soil; and 1♀ (MEI 040262) has been reared from a larva collected at Bodegones from soil   .

Distribution Brachylinga ornatifrons   is known from Peru ( Fig. 213).

Habitats and phenology Brachylinga ornatifrons   has been handnetted from 2 February to 13 November.

Specimens examined

The holotype male of Brachylinga ornatifrons   (MEI 134208) is labeled “Peru, 13.XI.02, Arequipa, Coll. W. Schnuse ” and is in the SMTD. Other specimens. PERU. AYACUCHO. Ica , 50 km E Nazca [­14.84, ­74.49], 2500 m, 10.III.1987, Karsholt, O., 1♂ MEI 077752 ( MEIC)   . HUANUCO. Tingo Maria, Monson Valley [­9.275, ­76.01], 18.IX.1954, EIS, Ross, E. S., 1♂ MEI 147291, 1♀ 147290 ( CAS)   ; Tingo [Tingo Maria], 16.VIII.–, Cockerell, 1♂ MEI 045945 ( USNM)   . LAMBAYEQUE. Lambayeque, University Nacional Vedro Luis Gallo [­6.693, ­79.904], 29.IX.1989, MEI, 1♀ MEI 045901 ( MEIC) GoogleMaps   , sieved; Lambayeque [­6.7, ­79.91], 2.II.1990, 1♂ MEI 045900 ( MEIC)   , sieved; 5.III.1981, 1♀ MEI 088214 ( INHS)   ; Bodegones [­6.72, ­79.99], 2.IV.1975, MEI, 1♀ MEI 040262 ( MEIC)   , sifted. LIMA. Chosica [11.94, ­76.7], –. XI.1961, Krauss, N. L. H., 1♂ MEI 045955–6, 1♀ 045954 ( USNM)   ; Quilmana [­12.96, ­76.39], 400 m, 25.IX.1951, Aguilar, P., 1♂ MEI 045942 ( INHS)   .

CAS

California Academy of Sciences

USNM

Smithsonian Institution, National Museum of Natural History

INHS

Illinois Natural History Survey

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Therevidae

Genus

Brachylinga

Loc

Brachylinga ornatifrons (Kröber)

Webb, Donald W. & Metz, Mark A. 2006
2006
Loc

ornatifrons Kröber (1911: 499

Metz, M. A. & Webb, D. W. & Irwin, M. E. 2003: 22
Krober, O. 1911: 499
1911