Titanogrypa ( Titanogrypa ) rubrigaster Dodge, 1965

Titanogrypa ( Titanogrypa) rubrigaster Dodge, 1965 View in CoL (SUBGEN. STAT. REVAL.)

( Figure 8 (e–g))

Titanogrypa rubrigaster Dodge, 1965: 495 View in CoL . Bahamas, Grand Bahama, West End.; Lopes 1969: 48 (catalogue). Titanogrypa ( Cucullomyia) rubrigaster View in CoL ; Pape 1996: 432 (catalogue, new combination).

Type material examined. HOLOTYPE ♂ [photography]: BAHAMAS, Grand Bahamas Islands , West End, 12.v.1953, E.B. Hayden & G.B. Rabb leg. ( AMNH).

Diagnosis. Arista short plumose ( Figure 8 (e)); scutellum with a lateral patch of whitish hair-like setulae; R1 vein dorsally setose; abdomen mostly yellowish brown; vesica short, hood shaped, with sclerotised basal portion and membranous distal portion ( Figure 8 (f, g)); juxta composed by lobes shorter than the paraphallus ( Figure 8 (f,g)); median and lateral styli not apically exposed in lateral view ( Figure 8 (f); fig. 49 in Dodge 1965).

Redescription. MALE (n = 1). Body length = 5.0 mm ( 4.5–5.5 mm)

Head. Parafacial and fronto-orbital plates with silvery grey pruinosity; parafacial plate with row of setulae close to eye; frons about 0.25 head width at level of ocellar triangle; frontal vitta entirely blackish; rows of frontal setae parallel except anteriormost 2 slightly divergent, 5 frontal setae reaching level of base of pedicel; reclinate orbital seta present, proclinate orbital setae absent; outer vertical setae 0.6x inner vertical setae and divergent; ocellar triangle black, with developed ocellar setae; postocellar and paravertical setae present; postocular area with grey pruinosity; gena with silvery grey pruinosity, black setae in anterior part and whitish setae close to occiput; postgena with silvery pruinosity and whitish setae; face with silvery pruinosity; facial ridge with silvery pruinosity; antenna black, first flagellomere with grey pruinosity and approximately 2.0x longer than pedicel; arista short plumose on basal 1/2; palpus blackish.

Thorax. Black with silvery-grey pruinosity, with slightly yellowish pruinosity on the distal 1/3 of mesonotum and scutellum; chaetotaxy: acrostichals 0 + 1, dorsocentrals 3 + 3 (2 posteriormost longer), intra-alars 1 + 2, supra-alars 1 + 3, postpronotals 3, notopleurals 4; katepisternals 3, almost in a straight line; postalar wall setulose; postalar callus with 2 setae; scutellum with a patch of whitish hair-like setulae onlateral margin and reaching ventral part, pairs of basal and subapical setae, a pair of weak preapical discal setae, and no apical setae; proepisternum bare; prosternum bare. Wing. Hyaline, with dark brown veins; tegula dark brown; basicosta yellowish; vein R1 dorsally setose; vein R4+5 with setulae dorsally; cell r4+5 open at wing margin; costal spine strong. Legs. Black with silvery pruinosity, pulvilli yellowish-brown; mid femur without posteroventral ctenidium; mid tibia nonvillous; hind coxa and trochanter with normal setae.

Abdomen. T1 + 2 blackish brown; T3 blackish brown in anterior half and yellowish brown in posterior one, with grey pruinosity; T4− T5 yellowish brown with grey pruinosity; T1 + 2− T4 with lateral marginal setae; T3− T5 without setae of wavy apex on the ventral surface; T4 with a pair of median marginal setae; T5 with a complete row of marginal setae, the median pair discally displaced ( Figure 8 (e)); ST5 deeply cleft with arms slightly divergent and black setulae.

Terminalia . Syntergosternite 7 + 8, epandrium and cerci yellowish brown with silvery grey pruinosity; syntergosternite 7 + 8 with about 3 pairs of marginal setae and sparse setulae; epandrium with 2 pairs of developed dorsal setae; surstylus short and clavate; cercus straight, tapered and rounded in distal end, with long setae along the anterior margin, in lateral view ( Figure 8 (e,f)), cercal prongs narrow and parallel in posterior view ( Figure 8 (g)); pregonite long and spatulate apex ( Figure 8 (f)); postgonite shorter than pregonite, with a long median setae ( Figure 8 (f)); distiphallus apex reasonably globose; vesica short, hood shaped, with sclerotised basal portion and membranous distal portion ( Figure 8 (f,g)); juxta composed by lobes shorter than the paraphallus ( Figure 8 (f,g)); median and lateral styli not apically exposed in lateral view ( Figure 8 (f); fig. 49 in Dodge 1965).

Female. Described and illustrated in Dodge (1965).

Distribution (Neotropical). Bahamas.

Comments. This species exhibits the diagnostic characters of the subgenus Titanogrypa , as previously discussed. Titanogrypa ( T.) rubrigaster closely resembles T. ( T.) alata because of its globose distiphallus and vesica without proximal projection, but differs from other species of Titanogrypa ( s. s.) by the characteristic abdominal colour and the shapes of the cercus, paraphallus and vesica ( Figure 8 (e,f)).