Myotrioza myopori 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 : 59-62

Myotrioza myopori Taylor , sp. nov.

( Figs 142–149 , 174–175 , 182 ; Tables 1–8 )

Types. AUSTRALIA, South Australia: Holotype: 1 ♂ (dried), Moorunde Wildlife Reserve, 34º25.184'S, 139º31.246'E, G.S. Taylor, 9.vi.2013, Swept Myoporum platycarpum, 2013 0 16 (SAM). Paratypes: 3 ♂, 1 ♀ (dried), 2 ♂, 3 ♀ (slide), same data as holotype (SAM, WINC); 3 ♂, 1 ♀ (slide), 1 ♂, 1 ♀ (ethanol), same data except 30.iii.2013, 2013 0 0 5 (SAM); 1 ♂, 1 ♀ (ethanol), same data except 34º27.845'S, 139º28.208'E, 25.iv.2011, 2011 112 (WINC); 2 ♀ (slide) 10 km SW Blanchetown [Moorunde WR], G.S. Taylor, 2.v.1982, on Myoporum platycarpum , WINC 028603–028604 (WINC); 1 ♂, 2 ♀ (ethanol), Moorunde Wildlife Res, nr Blanchetown, G.S. Taylor, 20.iv.1997, on Myoporum platycarpum (WINC); 1 ♂ (ethanol), Hiltaba Station Reserve, 32º06.145'S, 135º12.375’E, G.S. Taylor, 14.xi.2012, Swept Myoporum platycarpum, 2012 109 (H23); 1 ♂, 2 ♀ (ethanol), Hiltaba Station Reserve, 32º22.270'S, 135º17.532'E, G.S. Taylor, 16.xi.2012, swept Myoporum platycarpum, 2012 116 (H30); 19 ♂, 19 ♀ (dried) Moorunde Wildlife Reserve, 34º25.185’S, 139º31.240'E, G.S. Taylor & L. Krogmann, 8.xii.2013, swept Myoporum platycarpum, 2013 154 SE120 (WINC). Other specimens examined. South Australia: 10 immatures (slide), Moorunde Wildlife Res, nr Blanchetown, G.S. Taylor, 20.iv.1997, on Myoporum platycarpum (WINC).

Description. Adult ( Figs 142–145 ). Colouration. Male: [specimens point-mounted] Light yellow-brown with dark brown markings: vertex with dark brown stripe along medial suture and extensive dark brown marking in vicinity of fovea; eyes reddish brown; antennal segments 8–10 progressively dark brown; pronotum with thin dark brown medial stripe and a dark brown laterally; mesopraescutum with a pair of broad dark brown submedial markings (thin yellow brown medial stripe); mesoscutum with a narrow medial and two pairs of dark brown welldefined submedial markings; mesoscutellum with a thin dark brown medial stripe; 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 infuscation on dorsal femora, most extensive on hind femur; abdominal tergites 1–5 dark brown to black; sternites light brown with brown markings laterally; abdominal membrane colouration pale orange; proctiger, subgenital plate and parameres dark brown to black; subgenital plate light yellow brown posteriorly; parameres dark brown basally, apices black. Female: [specimen point-mounted] considerably paler than male, yellow brown; vertex with thin medial stripe and small brown marking in vicinity of fovea; pronotum with thin medial stripe and dark brown lateral marking restricted to posterior margin; mesopraescutum with a pair of diffuse brown submedial markings; mesoscutum with an indistinct narrow medial stripe a pair of orange brown to brown submedial markings; mesoscutellum with a medial stripe; abdominal tergites 1–5 dark brown to black; sternites with brown posterior band; proctiger and subgenital plate with anteromedial dark brown marking and dark brown to black apices.

Structure. Measurements as in Tables 4–8 . Body large, compact ( Figs 142–145 ). Head ( Figs 146–147 ); vertex with prominent medial suture, deeply sunk in vicinity of fovea; genal processes moderate in length, 0.39–0.50 times as long as vertex; antenna short, 0.73–0.89 times width of head, with 2 subapical rhinarium on each of segments 3 and 4, and a single subapical rhinaria on each of segments 6, 8 and 9; segment 10 with a bluntly rounded seta and a very short bluntly rounded seta. Fore wing ( Figs 148–149 ) 4.28–5.55 times as long as head width, 2.55–2.74 times as long as wide, short, broad with distinctly pointed apex; vein Rs straight, slightly upturned distally, terminating well short of wing apex, considerably shorter than vein M, RsM: 0.72–0.87; medial and cubital cells subequal; veins M1+2 and M3+4 short, broadly diverging with corresponding low m1 cell value: 1.24–1.51; veins Cu1a long, weakly arched and Cu1b short, widely divergent with corresponding moderate cu1 cell value: 1.07–1.60; metatibia 0.79–0.92 times as long as width of head, little longer than metafemur, with 2 inner and 1 outer sclerotised apical spurs. Male terminalia ( Figs 174–175 ); proctiger conoid, short, with weakly expanded lateral lobes; subgenital plate broadly rounded; parameres ( Fig. 175 ) short, broad, blade-like, evenly tapering to incurved sclerotised apices; distal portion of aedeagus moderate in length, with asymmetrical apical expansion ( Fig. 174 ). Female terminalia ( Fig. 182 ): 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 setae; subgenital plate with very sparse short setae.

Final instar immature. Triozine in type: dorsal surface outline broadly ovate (as in Fig. 123 ); cephalothorax entire; fore wing pad produced anteriorly to anterior margin of eye; abdominal tergites fused to form a caudal plate; caudal plate short, broad; circumanal pore field ventral and distant from posterior margin of abdomen; sectasetae short, closely and evenly spaced on anterior margin of head, fore and hind wing margins and margin of caudal plate; dorsum with evenly spaced short truncate setae. Colouration (specimens in ethanol): dark brown with mottled black markings. Measurements and ratios (n=3): AL 0.20–0.24; HW 0.69–0.74; BL 2.01–2.46; BW 1.65– 1.98; WL 1.12–1.37; CPL 0.89–1.09; CPW 1.14–1.47 CPRW 0.20–0.21; AL:HW 0.28–0.33; AL:WL 0.15–0.20; HW:BL 0.29–0.34; BL:BW 1.22–1.29; CPL:CPW 0.75–0.81; CPRW:CPW 0.13–0.18.

Comments. Myotrioza myopori sp. nov. can be distinguished by the following unique combination of characters: habitus as in Figs 142–145 , antenna with supernumerary rhinaria (2 on each of antennal segment 3 and 4), fore wing short, broad with slightly pointed apex, fore wing veins R+M+Cu, R and R1 pigmented darker than other wing veins, Rs considerably shorter than vein M ( Figs 148–149 ), female proctiger short, high with subapical dense field of hooked setae, valvula ventralis little curved, ventral profile of female subgenital plate flat ( Fig. 182 ), male proctiger conoid, with lateral lobes expanded medially, aedeagus long, paramere short, broad, blade-like with rounded apex ( Figs 174–175 ), host Myoporum , with eremean distribution. For diagnosis from closely related species, see Comments for M. desertorum sp. nov.

Etymology. Named after Myoporum , the host genus.

Host-plant association and distribution. ( Tables 2–3). Myotrioza myopori sp. nov. is recorded from Myoporum platycarpum R.Br. (Sugarwood, False Sandalwood) at widely separated localities at Hiltaba Station near the Gawler Ranges and near Blanchetown in eremean South Australia. It is one of 10 species of Myotrioza gen. nov. and 24 species of Triozidae recorded for South Australia. It is likely to occupy a broad distribution given that its host is widely distributed in southern and central Australia. It is one of 4 species of Myotrioza gen. nov., namely M. clementsiana sp. nov., M. flindersiana sp. nov., M. myopori sp. nov. and M. platycarpi sp. nov. from M. platycarpum and the only species from E. sturtii . For distribution of M. platycarpum , refer to M. clementsiana sp. nov.

Figures

FIGURES 142 – 149. Myotrioza myopori, sp. nov. (142), habitus, male, (dorsal aspect); (143), habitus, female (dorsal aspect); (144), habitus, male (lateral aspect); (145), habitus, female (lateral aspect); (146), head, male (dorsal aspect, from slide); (147), head, female (dorsal aspect); (148), fore wing, male (from slide); (149), fore wing, female. Scale = 1.0 mm.

FIGURES 174 – 181. Figs 174 – 175: Myotrioza myopori, sp. nov. (174), male terminalia (lateral aspect); (175), paramere (inner face, lateral aspect); Figs 176 – 177: M. oppositifoliae, sp. nov. (176), male terminalia (lateral aspect); (177), paramere (inner face, lateral aspect); Figs 178 – 179: M. pantonii, sp. nov. (178), male terminalia (lateral aspect); (179), paramere (inner face, lateral aspect); Figs 180 – 181: M. platycarpi, sp. nov. (180), male terminalia (lateral aspect); (181), paramere (inner face, lateral aspect). Scale = 0.2 mm for male terminalia, 0.1 mm for parameres.

FIGURES 182 – 185. Female terminalia (182), Myotrioza myopori, sp. nov.; (183), M. oppositifoliae, sp. nov.; (184), M. pantonii, sp. nov.; (185), M. platycarpi, sp. nov. Scale = 0.5 mm (all at same scale).

FIGURES 123 – 124. Myotrioza markmitchelli, sp. nov. (123), immature (dorsal aspect); (124), anterior margin of head and lateral margin of fore wing pad showing sectasetae. Scale = 1.0 mm in Fig 123, 0.05 mm in Fig. 124.