Myotrioza eremi Taylor

Taylor, Gary S., Fagan-Jeffries, Erinn P. & Austin, Andy D., 2016, A new genus and twenty new species of Australian jumping plant-lice (Psylloidea: Triozidae) from Eremophila and Myoporum (Scrophulariaceae: Myoporeae), Zootaxa 4073 (1), pp. 1-84 : 36-39

Myotrioza eremi Taylor , sp. nov.

( Figs 27–34 , 41–42 , 46 ; Tables 1–8 )

Types. AUSTRALIA, Western Australia: Holotype: 1 ♂ (dried), Credo Station Reserve, Coolgardie North Rd, 30º13.298'S, 120º38.508'E, G.S. Taylor, 5.ix.2011, Swept, Eremophila sp. (no flowers), 2011 167, CR48 (WAM). Paratypes: 1 ♀ (dried), 4 ♂, 4 ♀ (slide,), 2 ♀ (ethanol), same data as holotype (WAM, WINC); 1 ♂ (ethanol), same data except, Credo Station Reserve W, 30º12.355'S, 120º42.360'E, 2011 172, CR53 (WAM, WINC). South Australia: 1 ♂, 2 ♀ (ethanol), Bon Bon Station 30º26'26''S, 135º42'34''E, (SAM, WINC).

Description. Adult ( Figs 27–30 ). Colouration. Male: [specimens in ethanol] Yellow-brown with dark brown to black markings: vertex with dark brown subapical band (lobes of vertex pale yellow brown) and extensive dark brown marking in vicinity of fovea; eyes reddish brown; antennal segments 8–10 progressively dark brown to black; genal processes dark brown to black; pronotum with thin dark brown medial stripe and a dark brown marking anteriorly and posteriorly; mesopraescutum with a pair of broad orange brown to dark brown submedial markings; mesoscutum with a medial and two pairs of orange brown to dark brown submedial markings; mesoscutellum orange brown to dark brown; fore and hind wings clear; fore wing veins R+M+Cu, R and R1 pigmented distinctly darker brown than other wing veins; legs yellow-brown with brown to dark brown infuscation on dorsal femora, most extensive on hind femur; abdominal tergites 1–5 dark brown to black; sternites brown to black laterally (each segment with pale medial marking of diminishing size); abdominal membrane colouration orange; proctiger and subgenital plate dark brown to black with pale apices; parameres yellow brown basally, with brown infuscation posteriorly and apices black. Female: [specimens in ethanol] considerably paler than male, yellow brown; vertex with brown subapical band and small brown marking in vicinity of fovea; pronotum with dark brown marking restricted to posterior margin; mesopraescutum with a pair of diffuse orange brown submedial markings; mesoscutum with an orange brown medial stripe a pair of orange brown submedial markings; mesoscutellum pale yellow brown; abdominal tergites 1–5 yellow brown with each segment with anterior and posterior transverse brown infuscation; sternites pale yellow brown with similar anterior and posterior infuscation; proctiger grey brown to brown; subgenital plate pale yellow brown to orange brown with lateral brown infuscation and brown apex.

Structure. Measurements as in Tables 4–8 . Body large, compact ( Figs 27–30 ). Head ( Figs 31–32 ); vertex with prominent medial suture, deeply sunk in vicinity of fovea; genal processes moderate in length, 0.39–0.48 times as long as vertex; antenna short, 0.68–0.80 times width of head, with 2–3 subapical rhinaria on segment 3, 2 on segment 4 and a single subupical rhinarium on each of segments 6, 8 and 9; segment 10 with a long bluntly rounded and a short bluntly rounded seta. Fore wing ( Figs 33–34 ) 5.00–5.96 times as long as head width, 2.62–2.95 times as long as wide, short, broad with distinctly pointed apex; vein Rs evenly curved to costa, terminating well short of wing apex, considerably shorter than vein M, RsM: 0.67–0.75; medial cell smaller than cubital cell; veins M1+2 and M3+4 short, broadly diverging with corresponding low m1 cell value: 1.17–1.44; veins Cu1a long, weakly arched and Cu1b short, widely divergent with corresponding moderate cu1 cell value: 1.68–2.12; metatibia 0.82– 1.02 times as long as width of head, little longer than metafemur, with 2 inner and 1 outer sclerotised apical spurs. Male terminalia ( Figs 41–42 ); proctiger conoid, short, with weakly expanded lateral lobes; subgenital plate broadly rounded; parameres ( Fig. 42 ) short, broad, blade-like, evenly tapering to incurved sclerotised apices; distal portion of aedeagus moderate in length, with asymmetrical apical expansion ( Fig. 41 ). Female terminalia ( Fig. 46 ): proctiger short, triangular, posterior margin flat from lateral aspect and with strongly sclerotised sharply pointed apex; subgenital plate, triangular with tapering, strongly sclerotised sharply pointed apex; distal portion of proctiger with dense short pale setae and subapical dense brush of short dark sclerotised hooked setae; subgenital plate with very sparse short setae.

Comments. Myotrioza eremi sp. nov. can be distinguished by the following unique combination of characters: habitus as in Figs 27–30 , antenna with supernumerary rhinaria (2–3 on antennal segment 3 and 2 on segment 4), fore wing short, broad with distinctly pointed apex, fore wing veins R+M+Cu, R and R1 pigmented darker than other wing veins, Rs considerably shorter than vein M ( Figs 33–34 ), female proctiger short, high with subapical dense field of hooked setae, valvula ventralis little curved, ventral profile of female subgenital plate flat ( Fig. 46 ), male proctiger conoid, with lateral lobes expanded distally, aedeagus long, paramere broad, trapezoid, blade-like ( Figs 41–42 ), host Eremophila , with eremean distribution. For diagnosis from closely related species, see Comments for M. desertorum sp. nov.

Etymology. Named after L. eremi , of the desert.

Host-plant association and distribution. ( Tables 2–3). Myotrioza eremi sp. nov. is recorded from an undetermined species of Eremophila from Credo Station, near Coolgardie, Western Australia and from Eremophila paisleyi F.Muell. from Bon Bon Station in northern South Australia. It is one of 11 species of Myotrioza gen. nov. and 17 species of Triozidae recorded for Western Australia and one of 10 species of Myotrioza gen. nov. and 24 species of Triozidae recorded for South Australia. It is the only species to occur on E. paisleyi . Eremophila paisleyi is a rounded broom-like shrub 1–2 m high. It occurs in mulga and Casuarina woodlands on red sand plain and dune systems in central and northern South Australia and central-western Western Australia ( Chinnock 2007).

Figures

FIGURES 27 – 34. Myotrioza eremi, sp. nov. (27), habitus, male, (dorsal aspect); (28), habitus, female (dorsal aspect); (29), habitus, male (lateral aspect); (30), habitus, female (lateral aspect); (31), head, male (dorsal aspect, from slide); (32), head, female (dorsal aspect); (33), fore wing, male (from slide); (34), fore wing, female. Scale = 1.0 mm.

FIGURES 35 – 42. Figs 35 – 36: Myotrioza clementsiana, sp. nov. (35), male terminalia (lateral aspect); (36), paramere (inner face, lateral aspect); Figs 37 – 38: M. darwinensis, sp. nov. (37), male terminalia (lateral aspect); (38), paramere (inner face, lateral aspect); Figs 39 – 40: M. desertorum, sp. nov. (39), male terminalia (lateral aspect); (40), paramere (inner face, lateral aspect); Figs 41 – 42: M. eremi, sp. nov. (41), male terminalia (lateral aspect); (42), paramere (inner face, lateral aspect). Scale = 0.2 mm for male terminalia, 0.1 mm for parameres.

FIGURES 43 – 46. Female terminalia (43), Myotrioza clementsiana, sp. nov.; (44), M. darwinensis, sp. nov.; (45), M. desertorum, sp. nov.; (46), M. eremi, sp. nov. Scale = 0.5 mm (all at same scale).