Myotrioza interstantis 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 : 51-53

Myotrioza interstantis Taylor , sp. nov.

( Figs 99–106 , 127–128 , 134 ; Tables 1–8 )

Types. AUSTRALIA, Western Australia: Holotype: 1 ♂ (dried), Credo Station Reserve, 30º04.240'S, 120º35.709'E, G.S. Taylor, 4.ix.2011, Swept, Eremophila interstans ssp. interstans, 2011 159, CR40 (WAM). Paratypes: 3 ♂, 4 ♀ (dried, pointed), 31 ♂, 63 ♀ (dried, in 4 gel. caps), 6 ♂, 6 ♀ (slide), 8 ♂, 8 ♀ (ethanol), same data as holotype (WAM, SAM, WINC); 2 ♀ (dried, pointed), 84 ♂, 87 ♀ (dried, in 4 gel. caps); 3 ♂, 20 ♀, 2 immatures (ethanol), Credo Station Reserve, SW, 30º28.046'S, 120º43.222'E, G.S. Taylor, 31.viii.2011, Swept, Eremophila sp., 2011 132, CR13 WAM, WINC); 2 ♀ (ethanol), Credo Station Reserve, 30º04.225'S, 120º35.755'E, G.S. Taylor, 4.ix.2011, Swept, Dodonaea lobulata, 2011 158, CR39 (WINC); 2 ♀ (ethanol), 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 (WINC); 4 ♂, 7 ♀ (dried, pointed), 10 ♀ (dried, in 1 gel. cap.), Credo Station Reserve, Coolgardie North Road, - 30°18'28''S, 120°41'21''E GDA94, M. Cheng & C. Symonds, Swept, Eremophila interstans ssp. interstans , MC051 (WAM).

Description. Adult ( Figs 99–102 ). Colouration. Male: [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 indistinct greyish infuscation; abdominal membrane colouration pale orange; proctiger, subgenital plate and parameres yellow-brown; apices of parameres black. Female: [specimens in ethanol] as for male except generally darker with more prominent markings; abdominal tergites and sternites with brown transverse bands, darker medially and laterally; proctiger and subgenital plate pale yellow-brown with apices dark brown to black. Structure. Measurements as in Tables 4–8 . Body short, compact ( Figs 99–102 ). Head ( Figs 103–104 ); vertex with weak medial suture, moderately sunk in vicinity of fovea; genal processes moderate in length, 0.36–0.48 times as long as vertex; antenna very short, 0.55–0.67 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 ( Figs 105–106 ) 3.69–4.38 times as long as head width, 2.06–2.97 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: 0.95–1.07; medial cell smaller than cubital cell; veins M1+2 and M3+4 short, broadly diverging with corresponding low m1 cell value: 1.18–1.50; veins Cu1a short, arched and Cu1b short, each widely divergent with corresponding low cu1 cell value: 0.82–1.11; metatibia 0.53–0.65 times as long as width of head, similar length to metafemur, without sclerotised apical spurs. Male terminalia ( Figs 127–128 ); proctiger distinctly triangular, narrow basally, with expanded lateral lobes bearing a row of setae on dorsoposterior margin; subgenital plate broadly rounded; parameres ( Fig. 128 ) short, narrow, blade-like, evenly tapering to incurved sclerotised apices; distal portion of aedeagus moderate in length, with asymmetrical apical expansion ( Fig. 127 ). Female terminalia ( Fig. 134 ): proctiger short, triangular, posterior margin flat from lateral aspect and with weakly sclerotised apex; subgenital plate short, triangular with tapering, weakly sclerotised apex; distal portion of proctiger with sparse long pale setae and sparse field of pale weakly hooked setae; subgenital plate with sparse short setae.

Comments. Myotrioza interstantis sp. nov. can be distinguished by the following unique combination of characters: habitus as in Figs 99–102 , antenna with normal arrangement of rhinaria, fore wing broad with rounded apex, Rs about same length as vein M ( Figs 105–106 ), female proctiger with sparse field of weakly hooked setae, dorsoposterior margin with flat profile and without terminal upward inflection, valvula ventralis curved, ventral profile of female subgenital plate curved ( Fig. 134 ), male proctiger triangular with long setae along dorsoposterior margin, aedeagus elongate, paramere blade-like with pointed apex ( Figs 127–128 ).

Myotrioza interstantis sp. nov. is most closely related to M. oppositifoliae sp. nov. (COI sequence divergence 6.7– 9.5%), M. remota sp. nov. (COI sequence divergence 7.2–7.9%) and M. scopariae sp. nov. (COI sequence divergence 7.6–10.3%) ( Table 1 ).

Myotrioza interstantis sp. nov. can be separated from M. oppositifoliae sp. nov. by the profile of the female proctiger (short with flat dorsal margin in the former, elongate with a prominent subterminal lobe in the latter (cf. Figs 134 , 183 ) and by the shape of the male proctiger, aedeagus and paramere. In M. oppositifoliae sp. nov. the dorsoposterior margin of the male proctiger has longer evenly spaced setae, the aedeagus is considerably longer and thinner and the paramere is larger, with a prominent anterior subapical lobe (cf. Figs 127–128 , 176–177 ). Myotrioza oppositifoliae sp. nov. is very similar morphologically to M. scopariae sp. nov. but differs from by the profile of the female proctiger (subterminal lobe less distinct, not overhanging in the latter) (cf. Figs 183 , 220 ), shape of the female subgenital plate (more elongate, acute in former, shorter, pointed in latter) (cf. Figs 183 , 220 ) and shape of the paramere (with anterior subapical lobe in former, narrow elongate, without subapical lobe in latter) (cf. Figs 176–177 , 213–214 ).

Myotrioza interstantis sp. nov. can be separated from M. remota sp. nov. by the profile of the female proctiger (cf. Figs 134 , 219 ). Males of M. remota sp. nov. and M. scopulariae sp. nov. could not be morphologically separated, and require additional specimens to more accurately assess species level boundaries.

Etymology. Named after Eremophila interstans , the host species.

Host-plant association and distribution. ( Tables 2–3). Myotrioza interstantis sp. nov. is recorded from Eremophila interstans (S.Moore) Diels , from several nearby sites 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 and is considered endemic to that state. It is the only species of Myotrioza gen. nov. to occur on E. interstans . Eremophila interstans is a broom-like shrub 1–6 m in height with a rounded or flattened top, erect branches, and grey-green leaves. It occurs widely in the Coolgardie region of Western Australia ( Chinnock 2007). Its record from Dodonaea lobulata is considered doubtful, being more likely to be vagrant from nearby plants.

Figures

FIGURES 99 – 106. Myotrioza interstantis, sp. nov. (99), habitus, male, (dorsal aspect); (100), habitus, female (dorsal aspect); (101), habitus, male (lateral aspect); (102), habitus, female (lateral aspect); (103), head, male (dorsal aspect, from slide); (104), head, female (dorsal aspect); (105), fore wing, male (from slide); (106), 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 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 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 219 – 222. Female terminalia (219), Myotrioza remota, sp. nov.; (220), M. scopariae, sp. nov.; (221), M. serrulatae, sp. nov.; (222), M. telowiensis, sp. nov. Scale = 0.5 mm (all at same scale).

FIGURES 213 – 218. Figs 213 – 214: Myotrioza scopariae, sp. nov. (213), male terminalia (lateral aspect); (214), paramere (inner face, lateral aspect); Figs 215 – 216: M. serrulatae, sp. nov. (215), male terminalia (lateral aspect); (216), paramere (inner face, lateral aspect); Figs 217 – 218: M. telowiensis, sp. nov. (217), male terminalia (lateral aspect); (218), paramere (inner face, lateral aspect). Scale = 0.2 mm for male terminalia, 0.1 mm for parameres.