Simulium (Chirostilbia) jefersoni Hamada, Hernández, Luz & Pepinelli

Hernández, Luis Miguel, Shelley, Anthony John, Dias, Antonio Paulino Andrade De Luna & Maia-Herzog, Marilza, 2008, Carcinoma Folicular de Tiroides concomitante con Hiperparatiroidismo Primario. Caso Clínico, Zootaxa 1834, pp. 1-100 : 27-29

publication ID	https://doi.org/ 10.34631/sporl.419
persistent identifier	https://treatment.plazi.org/id/A2708A02-FFB4-FFF8-FF78-5069FC67FD33
treatment provided by	Felipe
scientific name	Simulium (Chirostilbia) jefersoni Hamada, Hernández, Luz & Pepinelli
status

Treatment

Simulium (Chirostilbia) jefersoni Hamada, Hernández, Luz & Pepinelli View in CoL

( Figs. 6 View PLATE 1 , 21 View PLATE 2 , 41 View PLATE 3 –46, 85–87, 111, 127, 142, 162, 163, 185, 199, 211, 224, 237, 251)

This is a newly described species from the state of Bahía.

Simulium (Chirostilbia) jefersoni Hamada et al., 2006: 21 View in CoL View Cited Treatment . HOLOTYPE ♀ (reared, pupal exuviae in a vial with glycerine). BRAZIL, Bahía State, Palmeiras County, Parque Nacional de Chapada Diamantina, Cachoeira da Fumaça GoogleMaps stream (#32), 12 o 36’S 41 o 27’W; 31.vii.2005 (N. Hamada, M. Pepinelli and V.L. Landeiro) (INPA) [Examined.]

Female. General body colour dark brown. Body length (specimens in alcohol) 2.6–.3.0 mm (mean= 2.8 mm, s.d.=0.20, n=3), wing length 1.3–1.8 mm (mean= 1.6 mm, s.d.=0.26, n=3), wing width 0.7–0.8 mm (mean= 0.8 mm, s.d.=0.05, n=3).

Head— dichoptic with dark red eyes and nudiocular area developed ( Fig. 6 View PLATE 1 ). Frons, clypeus and occiput black, with silvery grey pruinosity; clypeus and frons covered with dark, erect setae. Mouthparts dark brown. Antennae with scape and pedicel pale brown, remainder of flagellar segments dark brown. Cibarium without teeth, with well developed, sclerotised cornuae ( Fig. 21 View PLATE 2 ).

Thorax— scutum black covered by evenly arranged recumbent whitish setae; posterior margin with short recumbent whitish setae. Scutal pattern varies with light direction. With anterior illumination, thorax grey pruinose with median and 1+1 divergent submedian black vittae extending from same point on anterior margin and occupying three quarters of scutal length; lateral and posterior margins black and weakly pruinose; humeri pale brown with faint grey pruinosity (Fig. 45). With posterior illumination pattern reverses, with black areas becoming grey pruinose and grey pruinose areas black (Fig. 46). Scutellum dark brown with recumbent, whitish setae interspersed with long, black bristles. Postnotum dark brown with silver pruinosity. Pleura dark brown with silver pruinosity. Costa of wing with sparse distribution of spines and setae. Subcosta with line of approximately seven, sparsely distributed setae along total length of vein. Radius with line of setae intermixed with spines apically; basal section of Radius bare. Basal tuft of long, dark setae. Leg coloration and proportions as in Figs. 85–87 View PLATE 6 . Fore leg with coxa, trochanter, femur and tibiae yellow; apex of tibia weakly pale brown; tarsal segments dark brown. Mid leg pale yellow except coxa, apical articulation of tibia, apical half of basitarsus and tarsal segments II, III and IV dark brown to black. Hind leg pale yellow except coxa, apex of femur, distal half of tibia, apical third of basitarsus and tarsal segments II, III and IV dark brown. Claws curved without basal tooth. Halteres cream with brown bases.

Abdomen— tergites I–IX mottled dark brown to black; tergite II silver pruinose on anterolateral margins. Tergal plates developed; sternal plates undeveloped. Sternites greyish black; genitalia dark brown. Eighth sternite weakly sclerotised with irregularly distributed setae on posterior margin; gonapophyses nearly same length as eighth sternite at mid point, subtriangular, membranous, except extensively sclerotised on internal margins and with few setae basally ( Fig. 111 View PLATE 8 ). Cercus hemispherical, covered with long brown setae; paraproct suboval, ventral extension subtriangular, twice as long as cercus and rounded apically, sclerotised and covered with long setae basally and small hairs apically ( Fig. 127 View PLATE 10 ). Genital fork stout, sclerotised with apical termination of the stem expanded; termination of lateral arms weakly straight, anterior processes developed, rounded apically and posterior processes poorly developed ( Fig. 142 View PLATE 11 ). Spermatheca globular, without external sculpturing and with internal spicules in groups of two or three; area of insertion of spermathecal duct weakly sclerotised.

Male. General body colour dark brown. Body length (specimens in alcohol) 2.2–3.0 mm, wing length 1.6–2.5 mm (mean= 2.1 mm, s.d.=0.43, n=3), wing width 0.9 mm (mean= 0.9 mm, s.d.=0.02, n=3).

Head— holoptic with dark red eyes. Remainder of head coloration as in female.

Thorax— scutum black covered with recumbent whitish hairs. Scutal pattern varies with light direction. With anterior light source thorax black with 1+1 submedian, silver pruinose cunae on anterior half ( Fig. 162 View PLATE 12 ). With light source posterior to specimen thorax black ( Fig. 163 View PLATE 12 ). Humeri pale brown. Scutellum dark brown with recumbent, whitish hairs interspersed with long, erect, black hairs on posterior margin. Postnotum dark brown to black with silvery grey pruinosity. Wing setation as in female. Leg coloration as in female.

Abdomen— tergite I black with posterior margin silver pruinose; tergite II black in median region and pale brown laterally; tergites III–VI black; tergites VII–IX black mesally and greyish lateral margins; tergites II, IV–V with silver pruinosity on ventro-lateral margins [best seen with specimen viewed in lateral view]; basal fringe with long, brown hairs. Genitalia black; tergal plates developed, sternal plates undeveloped. Gonocoxite subrectangular; gonostyle conical, two thirds length of gonocoxite with ridge in median region and two spiniform setae apically [only visible at higher magnification]; gonocoxite and gonostyle covered with long setae ( Fig. 185 View PLATE 14 ). Ventral plate sclerotised, crescent-shaped and covered by small hairs, basal arms short and deeply sclerotised ( Fig. 199 View PLATE 15 ). Median sclerite long, pear-shaped with distinct incision in apical third ( Fig. 211 View PLATE 16 ). Paramere with developed and sclerotised basal process and reduced teeth apically ( Fig. 224 View PLATE 17 ).

Pupa. Cocoon length dorsally 2.8–3.8 mm (mean= 3.2 mm, s.d=0.28, n=10), ventrally 3.8–5.4 mm (mean= 4.5 mm, s.d.=0.39, n=10); pupa length 2.6–3.9 mm (mean= 3.1 mm; s.d.=0.43, n=10); gill length 1.5– 2.5 mm (mean= 1.9 mm, s.d.=0.38, n=8).

Cocoon— shoe-shaped as in Fig. 237 View PLATE 19 , dark brown composed of thick, coalesced fibres with an open weave posteriorly and distinct fenestrations anteriorly, with reinforced rim to anterior aperture, margin of aperture elevated.

Gill— pale yellowish with eight forwardly-directed arranged in the vertical plane, curving at mid point and directed inwards. Gill configuration with main trunk short, giving rise to three sets of primary branches in vertical plane, two internal and one external; dorsal and ventral internal primary branches each consisting of three secondary branches; external primary branch consisting of two secondary branches; all bifurcating at different heights in basal fifth of gill ( Fig. 251 View PLATE 21 ). stout basally and becoming narrower toward apex, rounded distally, without spicules on surface, and edges weakly crenate; all approximately same length.

Head— frontoclypeus with 3+3 long multiramous frontal and 1+1 long multiramous facial trichomes; frontoclypeus with distinct groups of platelets mesally, 1+1 dorso-laterally and 2–3 platelets in two groups laterally in frontal region, respectively; tubercles rounded, densely distributed over entire frontal and facial region.

Thorax— with five long multiramous trichomes near margin of dorsal cleft, 2+2 multiramous and one simple trichome at gill base, one small bifid or simple trichome on ventral margin, and one bifid or trifid trichome in median region of thorax; tubercles rounded, densely distributed over entire surface.

Abdomen— tergite I with 1+1 submedian simple trichomes; tergite II with 4+4 submedian spiniform setae in longitudinal row, 2+2 small simple trichomes anterior to most external spiniform setae, and 1+1 simple trichome on lateral margin; tergites III and IV with 4+4 submedian simple hooks in longitudinal row, 1+1 small simple trichomes anterior to most lateral hooks, and 1+1 small simple trichomes on lateral margin; tergites V with 1+1 sublateral small, simple trichomes, and 1+1 small simple trichomes on anterior margin; tergite VI with 1+1 submedian and 1+1 sublateral small trichomes; tergite VII with 1+1 submedian and 1+1 sublateral, small simple trichomes; tergite VIII with 1+1 submedian simple or bifid, and 1+1 sublateral simple trichomes; tergite IX weakly sclerotised, with 1+1 small spines. Spine combs on anterior margins of tergites VI–IX. Abdominal sternite III with 1+1 submedian and 2+2 sublateral small simple trichomes; sternite IV with 1+1 submedian and 2+2 sublateral smal simple trichomes; sternite V with 2 +2 adjacent bifid hooks in row and 2+2 simple trichomes anterior to most lateral hooks; sternites VI and VII with 2+2 well separated simple bifid or trifid hooks, sternite VII with 1+1 simple trichomes on lateral margin; sternite VIII without hooks; sternite IX weakly sclerotised. All abdominal sternites with spine combs on anterior margin.

Larva. A description of the larva is given by Hamada et al. (2006).