Trioza tripodanthi, Burckhardt, Daniel, Diaz, Fiorella & Queiroz, Dalva L., 2017

Burckhardt, Daniel, Diaz, Fiorella & Queiroz, Dalva L., 2017, Four new neotropical Trioza species associated with Loranthaceae (Santalales) and comments on mistletoe inhabiting psyllids (Hemiptera, Psylloidea), Alpine Entomology 1, pp. 91-108 : 95-97

Trioza tripodanthi sp. n. Figs 3, 4, 11, 12, 20-22, 33-35, 43, 45, 49)

Material examined.

Brazil: holotype ♀, Santa Catarina, Urubici, Estrada Morro da Igreja, ‒28.0439 ‒49.4865, 950 m, 29.vi.2017, Mimosa - Baccharis scrub along road, Tripodanthus acutifolius (D. Burckhardt & D.L. Queiroz) DB&DLQ#242(4) (MZSP, dry).

Paratypes: Brazil: 1 ♀, Paraná, Curitiba, Centro Politécnico, UFPR, -25.4467 -49.2317, 890 m, 5‒6.ii.2016, park with planted trees, remnants of Araucaria forest (D. Burckhardt & D.L. Queiroz) DB&DLQ#192(-) (NHMB, ethanol 70%, NMB-PSYLL0004509; 1 ♀, same but Praça Brigadeiro do Ar M. C. Eppinghaus, -25.4155 -49.2531, 4.i.2012, park, DB&DLQ#28(-) (NHMB, ethanol 70%, NMB-PSYLL0004507); 1 ♂, same but Tibagi, Parque Estadual Guartelá, ‒24.5683 ‒50.2553, 940 m, 10-12. vii.2017, cerrado vegetation, DB&DLQ#245(-) (NHMB, dry, NMB-PSYLL0004505); 3 ♀, Rio Grande do Sul, Cambará do Sul, Parque Nacional de Aparados da Serra, Macieira, -29.1333 -50.1333, 980 m, 24‒27.i.2016, edge of Araucaria forest, Atlantic forest, Baccharis scrub, swamp (D. Burckhardt & D.L. Queiroz) DB&DLQ#186(-) (NHMB, ethanol 70%, NMB-PSYLL0004508); 1 ♂, 4 ♀, 3 immatures, Santa Catarina, same data as holotype (NHMB, dry, slide, ethanol 70%, NMB-PSYLL0004448-NMB-PSYLL0004454).

Diagnosis.

Member of the Trioza struthanthi -group. Body of adult orange with conspicuously black genal processes. Genal processes 0.7 times as long as vertex along mid-line, strongly tapering near base, then tubular with blunt apex. Forewing subacute apically, 2.8 times as long as wide. Paramere about three times as long as broad, straight. Dorsal margin of female proctiger distal of circumanal ring evenly curved down to process; valvula ventralis with three apico-ventral teeth. Fifth instar immature with following numbers of marginal sectasetae (one side only): head 29-31, forewing bud 86-88, hindwing bud 13-15, precaudal abdominal margin 1-2, caudal plate 79; distal portion of sectasetae on forewing bud 1.5 times as long as wide.

Description.

Adult (Fig. 3). Colouration. Orange, intersegmental membranes red. Genal processes black; eyes grey, ocelli reddish. Antennal segments 1‒3 yellowish, remainder of flagellum brown, gradually becoming darker towards apex. Thorax indistinctly brownish dorsally, yellow ventrally. Tibiae indistinctly brownish at base, basitarsi yellow. Veins of forewing brown basally, yellow otherwise, membrane colourless, transparent. Hindwing transparent, colourless. Abdominal tergites brown, sternites yellow, intersegmental membranes yellowish to orange.

Structure. Body length ♂ 2.5-2.6 mm (2.55 ± 0.07 mm), ♀ 2.7-2.8 mm (2.78 ± 0.05 mm) (2 ♂, 4 ♀). Genal processes 0.7 times as long as vertex along mid-line, strongly tapering near base, then tubular with blunt apex (Fig. 4). Antenna 1.5 times as long as head width; segments 4 and 6 not inflated apically. Forewing (Fig. 11) narrowly lanceolate, subacute apically, 4.3-4.8 times as long as head width, 2.8 times as long as wide; surface spinules present in all cells except for cells c+sc and r1, leaving broad spinule-free stripes along the veins, arranged in squares or rhombs (Fig. 12). Metatibia 0.7-0.8 times as long as head width, genual tooth prominent. - Terminalia as in Figs 20-22, 33-35. Male: setae on male proctiger covering a narrow stripe along posterior margin arranged in two irregular longitudinal rows as well as on apex. Paramere slightly longer than proctiger, in profile, about three times as long as broad; outer lobe distinctly shorter than inner lobe; outer lobe digitiform, lacking sclerotised subapical tooth; inner lobe with sclerotised, forward directed point; inner surface with long setae, in basal half with a group of thick bristles. Distal segment of aedeagus with short, abruptly expanded apical dilatation. Female: dorsal outline of proctiger distal of circumanal ring evenly curved down to apical process; apical process bearing 4-5 uneven dorsal teeth. Subgenital plate, in ventral view, truncate apically, without well-separated apical group of setae. Oblique apex of ventral valvula with three large teeth. - Measurements see Table 2.

Fifth instar immature (Fig. 43). Colouration. Irregularly yellow. Eyes light reddish, antennae brown. Tips of tarsi brown. Bacteriome orange.

Structure. Outer circumanal ring (Fig. 49) with a single row of 84-87 pores (one side only); distance between posterior margins of circumanal ring and of caudal plate 1.3 times as long as outer circumanal ring in longitudinal body axis. Marginal truncate sectasetae present in following numbers (one side only): head 29-31, forewing bud 86-88, hindwing bud 13-15, precaudal abdominal margin 1-2, caudal plate 79; distal portion of sectasetae on forewing bud 1.5 times as wide (Fig. 45).

Etymology.

The species is named after its host plant genus Tripodanthus ; tripodanthi is a noun in the genitive case.

Distribution.

Brazil ( Paraná, Rio Grande do Sul, Santa Catarina).

Host plant.

Tripodanthus acutifolius (Ruiz & Pav.) Tiegh. ( Loranthaceae ).

Discussion.

Trioza tripodanthi differs from the other six members of the T. struthanthi -group in light body colour with the very conspicuous dark genal processes and details of the male and female terminalia. The fifth instar immatures of T. tripodanthi differ from those of T. struthanthi in the smaller number of marginal sectasetae and from those of T. tristericis in the shorter and broader marginal sectasetae. The immatures of T. vagata and of the North American species of the T. struthanthi -group are unknown.