fraterna Kröber (1911: 499
Psilocephala
Irwin and Webb (1992:87
Brachylinga
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
Webb, Donald W.
Metz, Mark A.
Zootaxa
2006
2006-08-14
1288
1288
1
241
MWY3
(Krober)
Krober
1911
[264,640,1441,1467]
Insecta
Therevidae
Brachylinga
Animalia
Diptera
78
79
Arthropoda
species
fraterna
( Figs. 13, 36, 59, 82, 105, 128, 151, 174)
fraterna Kröber (1911: 499male key, 521 orig. desc.; 1913:30 dist.; 1928a:6 dist., 9 malekey) ( Psilocephala); Irwin and Webb (1992:87checklist, comb. change) ( Brachylinga). Type locality Brazil, Soledade. Holotypemale in NMW.
Diagnosis Brachylinga fraternais taxonomically associated with B. curacaoensisin lacking setae on the katepisternum; in having the postocular, mesonotal, and coxal macrosetae dark reddish brown; in having the male parafacial silver or gray over the entire surface; the male frons lacking setae; in having the wing cell m 3closed; the maxillary palpus pale yellow or at most with the basal half reddish brown; the male tergite 8 ( Fig. 13) narrow medially; and in having the posterior margin of the hypoproct emarginate ( Fig. 13). Brachylinga fraternadiffers from B. curacaoensisin having the gonocoxite in ventral view ( Fig. 36) with the medial margin rounded anteriorly then deeply emarginate before expanding into a broad posterior projection, which then tapers apically to a blunt point; in dorsal view ( Fig. 59) the gonocoxite lacks a posteromedial lobe; in lateral view ( Fig. 82) the gonocoxite is square, the sides irregular and the posterior margin truncate; the distiphallus in dorsal view ( Fig. 128) thick, expanded apically and in lateral view ( Fig. 174) the apical third of the distiphallus is bent ventrally at a 90° angle. Redescription of holotypemale (MEI 147292) Body length 5.9 mm. Head.Length 0.84 mm. Ommatidia smaller ventrally and laterally. Frons pruinescence white, pale brown dorsally; setae absent. Antenna/head length 0.65; dark yellow, second and third flagellomeres dark brown; scape length 0.16 mm, width 0.11 mm, length/width 1.5, scape/pedicel length 2.3, scape/flagellum width 0.73, setae dark reddish brown, short; pedicel length 0.07 mm, length/width 0.64; flagellum length 0.32 mm, width 0.15 mm, length/width 2.1, flagellum/scape length 2.0. Parafacial pruinescence white. Maxillary palpus yellow; length 0.42 mm, length/width 7.0; setae pale yellow. Genal setae white. Occipital setae white becoming lanceolate dorsally; macrosetae absent. Postocular macrosetae dark reddish brown.
Thorax.Macrosetae dark reddish brown, 3 np, 2 sa, 1 pa, 1 dc, 2 sc. Mesonotum pruinescence white, dense; setae dark brown, short intermixed with white, lanceolate, appressed setae. Pleuron and scutellum dark reddish brown, pruinescence white; setae white on propleuron, anepisternum, metanepisternum, laterotergite, and scutellum, absent on katepisternum. Wing.Membrane hyaline, veins pale yellow; length 4.7 mm, length/ width 2.8; pterostigma indistinct; cell m 3closed, petiolate. Halter pale yellow. Legs.Coxa setae white, present on posterior half of midcoxa; macrosetae dark reddish brown. Fore and midfemur pale reddish brown, hindfemur dark yellow; ventral setae white, elongate on fore and midfemora; av 1:0:4, pv 0:0:4. Tibiae yellow (tibiae missing on hindlegs). Tarsomeres 1–2 yellow; 3–5 pale brown (tarsi missing on hindlegs). Abdomen.Pale reddish brown, pruinescence white; dorsal setae white, appressed; lateral setae white. Terminalia(MEI 045965) reddish brown. Tergite 8 ( Fig. 13), narrow medially ( 0.02 mm); setae dark yellow, absent medially on posterior margin. Sternite 8 ( Fig. 36) quadrate, posterior margin emarginate. Epandrium ( Fig. 13), sides tapered apically, posterior margin truncate; setae dark yellow. Cercus ( Fig. 13) ending basal to apex of hypoproct. Hypoproct ( Fig. 13), posterior margin emarginate, ending distal to apex of cercus. Gonocoxite ventral view ( Fig. 36), medial margin rounded anteriorly becoming deeply emarginate before expanding into broad posterior projection, then tapering apically to short, blunt point; setae dark yellow; dorsal view ( Fig. 59), posteromedial lobe rounded, gonocoxal bridge absent; lateral view ( Fig. 82) square, sides irregular, truncate apically; ventral lobe ( Fig. 36) with ventral spines. Gonostylus ( Fig. 105), basodorsal lobe moderately large, curved anteriorly; ventral margin curved, setae dark yellow, not directed apically in distinct tuft; fine, short spines absent laterally. Aedeagus with dorsal apodeme ( Fig. 128) oval, posterolateral margin rounded; ventral apodeme ( Fig. 151) tapered anteriorly, not extending to anterior margin of dorsal apodeme; distiphallus dorsal view ( Fig. 128) thick, expanded apically, lateral view ( Fig. 174), apical third bent ventrally at 90° angle, apicolateral spines small; ejaculatory apodeme ( Fig. 128), anterior margin bifurcate. Variation (n=2). Body length 5.9 mm. Thorax.Macrosetae 3 np, 2 sa, 1 pa, 1 dc, 2 sc. Legs.Anteroventral macrosetae 1:0:4–7, pv 0:0:4–5. FemaleUnknown.
Distribution Brachylinga fraternais known from two malescollected in Brazil. Habitats and phenology Brachylinga fraternahas been collected in April and December. Specimens examined Type specimen. The holotypemale of Psilocephala fraternaKröber(MEI 147292) is labeled "20.4, Solidade, Bras. Exped, Penther. ’03" and is in the NMW. Other specimens. BRAZIL. CEARA. Fortaleza, 6.XII.1960, N. Marston, 1♂MEI 045965 ( KSUC).
1960-12-06
KSUC
N. Marston
Brazil
Fortaleza
The
80
81
1
1
Ceara
holotype