Myotrioza platycarpi, 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 : 66-68

Myotrioza platycarpi, Taylor sp. nov.

( Figs 141 , 166–173 , 180–181 , 185 ; Tables 1–8 )

Types. AUSTRALIA, South Australia: Holotype: 1 ♂ (dried) Moorunde Wildlife Reserve, 34º25.184'S, 139º31.246'E, G.S. Taylor, 30.iii.2013, swept Myoporum platycarpum, 2013 0 0 5 (SAM). Paratypes: 6 ♂, 5 ♀ (dried), 5 ♂, 5 ♀ (slide), 3 ♂, 2 ♀ (ethanol), same data as holotype (SAM, WINC); 1 ♂, 1 ♀ (dried) same data except 9.vi.2013, 2013 0 16 (WINC); 1 ♂ (dried) Flinders Ranges, Beltana Station, 30º48.508'S, 138º25.260'E, R. Kittel, 7.iv.2011, roadside vegetation (WINC); 1 ♀ (dried) Flinders Ranges, 18 km E Blinman, Eregunda Creek, 31º05.604'S, 138º51.940'E, R. Kittel, 8.iv.2011, sweeping Senna artemisioides (WINC); 6 ♂, 4 ♀ (dried), 6 ♂, 2 ♀ (ethanol), Hiltaba Station Reserve, 32º06.145'S, 135º12.375'E, G.S. Taylor, 14.xi.2012, swept Myoporum platycarpum, 2012 109 (H23) (WINC); 2 ♂, 1 ♀ (ethanol), Hiltaba Bush Blitz, 32.10246ºS, 135.20624ºE, R. Kittel, 14.xi.2012, sweeping Myoporum (WINC); 7 ♀ (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). Victoria: 6 ♂, 1 ♀ (ethanol) Sturt Hwy, 100 km W Mildura [~ 34º16'S, 141º02'E], G.S. Taylor, 21.vi.1999, on Myoporum platycarpum (WINC). Northern Territory: 1 ♂ (dried) 3.6 km NW of Henbury homestead, Towards 3 Mile Creek, 1.5 km W Stuart Hwy, 24° 31' 33''S, 133° 13' 59''E, 431m, 16.v.2013, M. Cheng, C. Bayer, M. Colquhoun, beat Eremophila sturtii BBHS13 L15 H24 (WAM); 11 ♂, 7 ♀ (dried), 4 ♂, 2 ♀ (ethanol), Henbury Station, 14 km NE from Henbury homestead, North of Chandler Range, approx 2.3 km from Stuart Hwy, 24° 27' 56''S, 133° 21' 7''E, 549m, 17.v.2013 M. Cheng & C. Duykers, beat Eremophila sturtii BBHS13 L20 H31 (WAM, WINC).

Description. Adult ( Figs 166–169 ). Colouration. Male: Vertex brown with dark brown marking in vicinity of fovea and darker anteriorly (some specimens uniformly dark brown); genal processes dark brown basally, pale brown apically; eyes reddish brown; antennal segments 1–7 yellow-brown, segments 8–10 dark brown to almost black; pronotum brown to dark brown with a pale yellow-brown medial marking and pale yellow-brown on lateral margin; mesopraescutum brown to dark brown with a pale yellow-brown thin medial stripe; mesoscutum with a dark brown medial stripe, two pairs of submedial markings and pale yellow-brown lateral margin (darker specimens uniformly dark brown medially with pale lateral margin); mesoscutellum brown to dark brown; fore and hind wings clear; fore wing veins equally pigmented brown; mesothoracic pleurite pale laterally, dark brown basally; legs pale yellow-brown, femora with medial brown marking, ultimate tarsal segments dark brown to black; meracanthus pale yellow-brown; abdominal tergites 1–5 dark brown to black sternites pale yellow-brown with variable brown submedial marking; proctiger, subgenital plate and parameres yellow-brown; apices of parameres black. Female: as for male except with generally paler brown markings in vicinity of fovea, on mesopraescutum, mesoscutum and abdominal tergites; proctiger and subgenital plate pale yellow-brown with apices dark brown to black; proctiger with additional dark brown infuscation basally, in vicinity of circumanal pore ring and dorsomedially.

Structure. Measurements as in Tables 4–8 . Body short, compact ( Figs 166–169 ). Head ( Figs 170–171 ); vertex with prominent medial suture, deeply sunk in vicinity of fovea; genal processes very short, 0.16–0.20 times as long as vertex; antenna very short, 0.51–0.65 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 172–173 ) 3.78–4.42 times as long as head width, 2.50–2.88 times as long as wide, short, broad with rounded apex; vein Rs straight, slightly upturned distally, terminating short of wing apex, about same length as vein M, RsM: 0.95–1.08; medial and cubital cells subequal; veins M1+2 and M3+4 short, broadly diverging with corresponding low m1 cell value: 1.68–1.93; veins Cu1a short, arched and Cu1b short, each widely divergent with corresponding low cu1 cell value: 1.03–1.49; metatibia 0.86–0.94 times as long as width of head, considerably longer than metafemur, with 2 inner and 1 outer sclerotised apical spurs. Male terminalia ( Figs 180–181 ); proctiger conoid, without lateral lobes; subgenital plate broadly rounded; parameres ( Fig. 181 ) very short, broad, blade-like, evenly tapering to incurved sclerotised apices; distal portion of aedeagus short, with asymmetrical apical expansion ( Fig. 180 ). Female terminalia ( Figs 141 , 185 ): proctiger short, truncate, with sclerotised apex; subgenital plate short, triangular with tapering sclerotised apex; distal portion of proctiger and subgenital plate with short setae.

Comments. Myotrioza platycarpi sp. nov. can be distinguished by the following unique combination of characters: habitus as in Figs 166–169 antenna with supernumerary rhinaria, fore wing elongate with rounded apex, Rs about same length as vein M ( Figs 172–173 ), female proctiger short with short setae, rounded blunt profile without terminal upward inflection, valvula ventralis little curved, ventral profile of female subgenital plate curved ( Fig. 141 , 185 ), male proctiger conoid without lateral lobe, aedeagus short, paramere broadly ovate with rounded apex ( Figs 180–181 ).

Myotrioza platycarpi sp. nov. appears as sister to a clade comprising M. interioris sp. nov., M. myopori sp. nov., M. markmitchelli sp. nov., M. eremi sp. nov., M. desertorum sp. nov. ( Fig. 1 ). On the basis of the presence of supernumerary rhinaria, it is likely that M. serrulatae sp. nov. (not represented in phylogeny) belongs to this clade. Myotrioza platycarpi sp. nov. is not particularly closely related to any species (COI sequence divergence>11% to its closest congeners) ( Table 1 ): M. insularis sp. nov. (COI sequence divergence 11.7–12.4%), M. clementsiana sp. nov. (12.9%), M. longifoliae sp. nov. (13.1–13.8%), M. markmitchelli sp. nov. (14.8%), M. interioris sp. nov. (15.0%) and M. myopori sp. nov. (15.3–15.5%) ( Table 1 ). It differs from these species by the short, rounded profile of the female proctiger, a character that is shared only with M. longifoliae sp. nov., but in the latter the female proctiger has long pale setae and and sparse field of pale weakly hooked setae (cf. Figs 138, 141 ). The male paramere for the latter differs in that it is short, broad, with posterior hooked setae. (cf. Figs 129–130 , 180–181 ). Myotrioza platycarpi sp. nov. differs from M. interioris sp. nov., M. myopori sp. nov., M. markmitchelli sp. nov., M. eremi sp. nov., M. desertorum sp. nov. as it is the only species in this postulated sister clade not to possess pigmented fore wing veins R+M+Cu, R and R1.

Etymology. Named after Myoporum platycarpum , the host species.

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 Beltana Station and Blinman in the Flinders Ranges, Hiltaba Station near the Gawler Ranges, near Blanchetown in eremean South Australia, north-eastern Victoria and from E. sturtii R.Br. at Henbury in the Northern Territory. It is one of 10 species of Myotrioza gen. nov. and 24 species of Triozidae recorded for South Australia; the only species of Myotrioza and one of only 5 species of Triozidae from Victoria; and the only species of Myotrioza and one of only 3 species of Triozidae from Northern Territory. It is likely to occupy a broad distribution given that its host plants are 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. Eremophila sturtii is a multi-stemmed shrub 1–3 m high that occurs on red loamy and sandy soils in Eucalyptus , Acacia and Casuarina woodlands in northern South Australia and southern Northern Territory and in eremean eastern South Australia, south-western Queensland and western New South Wales ( Chinnock 2007). Its record from Senna artemisioides is considered doubtful, being more likely to be vagrant from nearby plants.

Figures

FIGURE 1. Molecular phylogeny constructed from 427 bp region of the mitochondrial gene cytochrome c oxidase subunit I (COI) for the Myotrioza from Eremophila and Myoporum comprising a broad sampling of in-group and 5 out-group taxa. The number of putative species are shown for uncorrected pairwise percent divergences (Table 1) at 2 %, 3 – 5 %, 5 – 6 % and 8 %.

FIGURES 137 – 141. Fig. 137: antenna, male: Myotrioza serrulatae, sp. nov.; Figs 138 – 141: female terminalia: (138), M. longifoliae, sp. nov.; (139), M. markmitchelli, sp. nov.; (140), M. oppositifoliae, sp. nov.; (141), M. platycarpi, sp. nov. Scale = 0.2 mm.

FIGURES 166 – 173. Myotrioza platycarpi, sp. nov. (166), habitus, male, (dorsal aspect); (167), habitus, female (dorsal aspect); (168), habitus, male (lateral aspect); (169), habitus, female (lateral aspect); (170), head, male (dorsal aspect, from slide); (171), head, female (dorsal aspect); (172), fore wing, male (from slide); (173), 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 125 – 132. F igs 125 – 126: Myotrioza interioris, sp. nov. (125), male terminalia (lateral aspect); (126), paramere (inner face, lateral aspect); Figs 127 – 128: M. interstantis, sp. nov. (127), male terminalia (lateral aspect); (128), paramere (inner face, lateral aspect); Figs 129 – 130: M. longifoliae, sp. nov. (129), male terminalia (lateral aspect); (130), paramere (inner face, lateral aspect); Figs 131 – 132: M. markmitchelli, sp. nov. (131), male terminalia (lateral aspect); (132), paramere (inner face, lateral aspect). Scale = 0.2 mm for male terminalia, 0.1 mm for parameres.