Myotrioza remota Taylor, sp. nov.

Myotrioza remota Taylor, sp. nov.

(Figs 186–188, 219; Tables 1–8)

Types. AUSTRALIA, Western Australia: Holotype: 1 ♀ (slide) Credo Station Reserve, W, 30°12.355'S, 120°42.360'E, G.S. Taylor, 5.ix.2011, swept Eremophila sp. (no flowers) 2011 172, CR53 (WAM); 2 ♀ (slide), same data as holotype (WAM, WINC). Other material examined. Western Australia: 1 ♂ (slide), same data as holotype (WINC).

Description. Adult. Colouration. Female: [specimens in ethanol] Pale yellow brown: vertex with indistinct pale orange brown marking in vicinity of fovea; eyes greyish brown; antennal segments 8–10 progressively dark brown; mesopraescutum with a pair of pale orange brown anterior submedial markings; mesoscutum with a narrow medial and two pairs of pale orange brown submedial markings; fore wings with brown infuscation;hind wings clear; fore wing veins equally pigmented brown; legs pale yellow-brown; abdominal tergites 1–5 with greyish infuscation; proctiger and subgenital plate pale yellow-brown with a brown to dark brown marking anteriolaterally and apices dark brown.

Structure. Measurements as in Tables 4–8. Body short, compact. Head (Figs 186–187); vertex with weak medial suture, little sunk in vicinity of fovea; genal processes short, 0.26–0.35 times as long as vertex; antenna very short, 0.57–0.70 times width of head, with a single subapical rhinarium on each of segments 4, 6, 8 and 9; segment 10 with a short bluntly rounded seta and a minute bluntly rounded seta. Fore wing (Fig. 188) 3.65–5.13 times as long as head width, 2.77–2.85 times as long as wide, short, broad with rounded apex; vein Rs straight, slightly upturned distally, terminating short of wing apex, little shorter than vein M, RsM: 0.86–0.89; medial cell short, a little shorter than cubital cell; veins M1+2 and M3+4 short, broadly diverging with corresponding low m1 cell value: 1.13–1.46; veins Cu1a short, arched and Cu1b short, each widely divergent with corresponding low cu1 cell value: 0.87–1.33; metatibia 0.65–0.88 times as long as width of head, similar length to metafemur, without sclerotised apical spurs. Male indistinguishable from male of M. scopariae sp. nov.: proctiger distinctly triangular, narrow basally, with expanded lateral lobes bearing a prominent row of long equidistant setae on dorsoposterior margin; subgenital plate broadly rounded; parameres very long, narrow, acicular, evenly tapering to incurved sclerotised apices; distal portion of aedeagus long, with asymmetrical apical expansion. Female terminalia (Fig. 219): proctiger moderate in length, triangular, posterior margin with a weak subterminal lobe from lateral aspect and with sclerotised apex; subgenital plate triangular with tapering sclerotised apex; distal portion of proctiger with sparse long pale setae and a sparse field of pale, very weakly hooked setae; subgenital plate with sparse short setae.

Comments. Myotrioza remota sp. nov. can be distinguished by the following unique combination of characters: habitus as in M. oppositifoliae sp. nov. (Figs 150–153) and M. scopariae sp. nov. (Figs 189–192); antenna with normal arrangement of rhinaria, fore wing broad with rounded apex, Rs little shorter than vein M (Fig. 188), female proctiger with sparse setae, dorsoposterior margin without subapical lobe and with weak terminal upward inflection, valvula ventralis elongate, curved, subgenital plate weakly pointed, ventral profile of female subgenital plate curved (Fig. 219).

The single male specimen has been excluded from the type series as it is almost indistinguishable from the males of M. scopariae sp. nov. (requiring additional specimens to adequately correlate the sexes of this species and to assess intraspecific variation. However, it differs from the males of M. oppositifoliae sp. nov. that have longer hind tibia. The hind tibia of both M. remota sp. nov. and M. scopariae sp. nov. are short, about equal in length to the hind femur. For diagnosis from closely related species, see Comments for M. interstantis sp. nov.

Etymology. Named after L. remota, remote, distant.

Host-plant association and distribution. (Tables 2–3). Myotrioza remota sp. nov. is recorded from an undetermined species of Eremophila, from a single locality at Credo Station, near Coolgardie, Western Australia. It is one of 11 species of Myotrioza gen. nov. and 17 species of Triozidae recorded for Western Australia. It is considered endemic to that state.