Myotrioza longifoliae 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 : 53-55

Myotrioza longifoliae Taylor , sp. nov.

( Figs 107–114 , 129–130 , 135 , 138 ; Tables 1–8 )

Types. AUSTRALIA, South Australia: Holotype: 1 ♂ (dried) Moorunde Wildlife Reserve, 34º26.807'S, 139º28.717'E, G.S. Taylor, 9.vi.2013, swept Eremophila longifolia, 2013 0 15 (SAM). Paratypes: 1 ♀ (dried), 3 ♂, 3 ♀ (slide), 1 ♀ (ethanol), same data as holotype (SAM, WINC); 1 ♂, 3 ♀ (dried) Moorunde Wildlife Reserve, 34º26.800’S, 139º28.726'E, G.S. Taylor & L. Krogmann, 8.xii.2013, swept Eremophila longifolia, 2013 153 SE119 (WINC).

Description. Adult ( Figs 107–110 ). Colouration. Male: Pale yellow brown: vertex with indistinct brown marking in vicinity of fovea, extending to a second, sometimes paler anterior marking; eyes greyish brown; antennal segments 8–10 progressively dark brown; mesopraescutum with a pair of pale orange brown anterior submedial markings; mesoscutum with two pairs of pale orange brown submedial markings; fore and hind wings clear; fore wing veins equally pigmented brown; legs pale yellow-brown; abdominal tergites 1–5 dark brown to black with pale medial stripe; abdominal membrane colouration pale green; proctiger yellow brown with dark brown anterior face, subgenital plate and parameres yellow-brown; apices of parameres black. Female: as for male except proctiger yellow-brown with dark brown infuscation proximally and dorsally and with dark brown to black apex; and subgenital plate pale yellow-brown with apex dark brown to black.

Structure. Measurements as in Tables 4–8 . Body short, compact ( Figs 107–110 ). Head ( Figs 111–112 ); vertex with weak medial suture, moderately sunk in vicinity of fovea; genal processes short, 0.32–0.40 times as long as vertex; antenna very short, 0.58–0.74 times width of head, with a single subapical rhinarium on each of segments 4, 6, 8 and 9; segment 10 with a bluntly rounded seta and a shorter bluntly rounded seta. Fore wing ( Figs 113–114 ) 4.32–4.55 times as long as head width, 2.66–2.79 times as long as wide, short, broad with slightly pointed apex; vein Rs straight, slightly upturned distally, terminating well short of wing apex, somewhat shorter than vein M, RsM: 0.78–0.87; medial cell smaller than cubital cell; veins M1+2 and M3+4 short, broadly diverging with corresponding low m1 cell value: 1.06–1.58; veins Cu1a short, arched and Cu1b short, each widely divergent with corresponding low cu1 cell value: 0.78–1.39; metatibia 0.80–0.98 times as long as width of head, similar length to metafemur, with 2 inner and 1 outer indistinct, unsclerotised apical spurs. Male terminalia ( Figs 129–130 ); proctiger conoid, with weakly expanded lateral lobes; subgenital plate broadly rounded; parameres ( Fig. 130 ) short, narrow, blade-like, evenly tapering to incurved sclerotised apices; distal portion of aedeagus short, with asymmetrical apical expansion ( Fig. 129 ). Female terminalia ( Figs 135 , 138 ): proctiger short, triangular, posterior margin rounded from lateral aspect and with sclerotised apex; subgenital plate short, triangular with tapering, sclerotised apex; distal portion of proctiger with long pale setae and sparse field of pale weakly hooked setae; subgenital plate with sparse long pale setae.

Comments. Myotrioza longifoliae sp. nov. can be distinguished by the following unique combination of characters: habitus as in Figs 107–110 , antenna with normal arrangement of rhinaria, fore wing broad with slightly pointed apex, Rs somewhat shorter than vein M ( Figs 113–114 ), female proctiger with sparse field of weakly hooked setae, short rounded profile without terminal upward inflection, valvula ventralis curved, ventral profile of female subgenital plate convex ( Fig. 135 ), male proctiger conoid aedeagus thin, short, paramere triangular with bluntly pointed apex and recurved setae on posterior margin ( Figs 129–130 ).

Myotrioza longifoliae sp. nov. forms a sister clade to ((( M. eremophili sp. nov. + M. darwinensis sp. nov.) M. flindersiana sp. nov.) + ((( M. oppositifoliae sp. nov. + M. interstantis sp. nov.) M. scopariae sp. nov.) M. remota sp. nov.)) ( Fig. 1 ). It is not particularly closely related to any species (COI sequence divergence>11% to its closest congeners) ( Table 1 ). It differs from all these species by the short, rounded profile of the female proctiger, a character that is shared only with M. platycarpi sp. nov., but in the latter the setae on the female proctiger are short, without hooks (cf. Figs 138, 141 ). The male paramere for the latter differs in that it is short, broad, without hooked setae (cf. Figs 129–130 , 180–181 ).

Etymology. Named after Eremophila longifolia , the host species.

Host-plant association and distribution. ( Tables 2–3). Myotrioza longifoliae sp. nov. is recorded from Eremophila longifolia (R.Br.) F.Muell. (Berrigan, Emubush) at a single locality in mallee woodlands near Blanchetown, South Australia. It is one of 10 species of Myotrioza gen. nov. and 24 species of Triozidae recorded for South Australia. It is considered endemic to that state, although it is likely to occupy a broad distribution given that its host is widely distributed in eremean southern and central Australia. It is the only species of Myotrioza gen. nov. to occur on E. longifolia . Eremophila longifolia is a large spreading shrub to small tree to 8 m in height. It occurs widely in a broad range of habitats in inland WA, NT, SA, Qld, NSW and Vic ( Chinnock 2014).

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 107 – 114. Myotrioza longifoliae, sp. nov. (107), habitus, male, (dorsal aspect); (108), habitus, female (dorsal aspect); (109), habitus, male (lateral aspect); (110), habitus, female (lateral aspect); (111), head, male (dorsal aspect, from slide); (112), head, female (dorsal aspect); (113), fore wing, male (from slide); (114), fore wing, female. Scale = 1.0 mm.

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.

FIGURES 133 – 136. Female terminalia (133), Myotrioza interioris, sp. nov.; (134), M. interstantis, sp. nov.; (135), M. longifoliae, sp. nov.; (136), M. markmitchelli, sp. nov. Scale = 0.5 mm (all at same scale).

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 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.