Aacanthocnema luehmannii Taylor

Taylor, Gary S., Jennings, John T., Purcell, Matthew F. & Austin, Andy D., 2011, A new genus and ten new species of jumping plant lice (Hemiptera: Triozidae) from Allocasuarina (Casuarinaceae) in Australia, Zootaxa 3009, pp. 1-45 : 23

Aacanthocnema luehmannii Taylor , sp. nov.

Figs 43–50 , 60–62 , 133 ; Tables 1–5, 8

Types. AUSTRALIA, Queensland: Holotype: 13 (slide) 10 km W Millmerran, 27º54.025'S, 151º11.944'E, G.S. Taylor, 5.x.2008, Allocasuarina luehmannii , ABCL 2008 587 (QMBA). Paratypes: 2 Ƥ (slide) same data as holotype (QMBA).

Other material examined. AUSTRALIA, South Australia: from Allocasuarina luehmannii : 1 3 (slide) 14 km E Bordertown ( WINC).

Description. Adult ( Figs 43–50 ). Colour: Male: general colour pale cream to ochraceous with orange-brown to brown markings. Vertex pale with thin black transverse line on anterior margin and a pair of pale brown spots in vicinity of fovea; genal processes with pale grey infuscation towards apices; antennal segments 1–2 ochraceous to brown; segment 3 darker apically; segments 4–10 dark brown to black; pronotum pale with a pair of pale brown lateral spots; mesopraescutum with a pair of short broad triangular markings confluent with anterior margin; mesoscutum with two pairs of orange-brown to brown longitudinal submedial stripes; mesoscutellum ochraceous; wings clear with anterior half of vein Cu1a distinctly suffused dark brown to black; legs pale with dorsal brown infuscation; fore- and mid-tarsi dark brown to black; hind basitarsi with dorsal infuscation, distal segment of hind tarsi dark brown to black; abdominal tergites with a broad dark brown to black longitudinal medial stripe, and a pair of thin dark brown longitudinal lateral stripes; proctiger and subgenital plate ochraceous; parameres with brown to dark brown apices; proximal segment of aedeagus dark brown to black, distal segment pale. Female: as for male, except with slightly paler markings; proctiger with dark brown to black infuscation confluent with lateral margins of circum-anal pore ring; subgenital plate with pale brown infuscation towards apex.

Structure: measurements and ratios as in Tables 1–5. Antennae moderate in length, 1.60 times width of head; genal processes elongate, conical with rounded apices, anterior margin of vertex rounded from dorsal aspect, delineated from genal processes by prominent ridge; vertex with weak medial suture; pronotum with weak anterior, medial node; thorax weakly arched, head little wider than pronotum and mesoscutum, fore wings short with broadly rounded apex; Rs short, mostly straight except distally, terminating well short of wing apex; vein M1+2 terminating short of wing apex; cell m1 short, broadly triangular, m1 cell value 0.70–0.86; cell cu1 short triangular, cu1 cell value 1.03–1.18; vein Cu1a weakly arched; radular areas prominent, elongate triangular in cells m2 and cu1; male terminalia as in Fig 60–61 ; proctiger long, thin, without lateral expansions; parameres short, with basal expansion, strongly incurved towards apices. Female terminalia as in Fig. 62 ; proctiger short broad with angular dorso-posterior margin from lateral aspect; subgenital short, broadly rounded, triangular from lateral aspect.

Nymph. Unknown.

Etymology. Named after the host plant, Allocasuarina luehmannii .

Distribution. Recorded from two widely separated localities in inland south-eastern Queensland and inland south-eastern South Australia ( Fig. 137 ).

Host plant. Recorded from Allocasuarina luehmannii (R. Baker) L.A.S.Johnson (bull oak). Allocasuarina luehmannii occurs as a 5–15 m tree in woodland in non-calcareous soils from Mareeba, Queensland through central Queensland and New South Wales, to north-western Victoria and eastern South Australia to S of Bordertown ( Wilson & Johnson 1989).

Comments. This species has been collected rarely from only two, widely separated localities: three specimens from south-eastern Queensland, and one from south-eastern South Australia. Both series were collected from A. luehmannii . Aacanthocnema luehmannii is very close morphologically to Aa. dobsoni , Aa. huegelianae and Aa. torulosae (see Comments under Aa. dobsoni for diagnoses).

Figures

FIGURES 43 – 50. Aacanthocnema luehmannii sp. nov.: (43), habitus, male (dorsal aspect); (44), habitus, female (dorsal aspect); (45), habitus male (lateral aspect); (46), habitus female (lateral aspect); (47), fore wing, male; (48), fore wing, female; (49), head, male (dorsal aspect); (50), head, female (dorsal aspect). Scale = 0.5 mm.

FIGURES 60 – 65. Aacanthocnema luehmannii sp. nov. and Aa. torulosae sp. nov.: Aa. luehmannii: (60), male terminalia (lateral aspect); (61), paramere (inner face, lateral aspect); (62), female terminalia (lateral aspect); Aa. torulosae: (63), male terminalia (lateral aspect); (64), paramere (inner face, lateral aspect); (65), female terminalia (lateral aspect). Scale = 0.2 mm.

FIGURES 127 – 135. Acanthocasuarina muellerianae sp. nov., Ac. tasmanica sp. nov. and Ac. verticillatae sp. nov.: Ac. muellerianae: (127), male terminalia (lateral aspect); (128), paramere (inner face, lateral aspect); (129), female terminalia (lateral aspect); Ac. tasmanica: (130), male terminalia (lateral aspect); (131), paramere (inner face, lateral aspect); (132), female terminalia; Ac. verticillatae: (133), male terminalia (lateral aspect); (134), paramere (inner face, lateral aspect); (135), female terminalia (lateral aspect). Scale = 0.2 mm.

FIGURES 136 – 137. Distribution for species of Aacanthocnema in Australia: (136),, Aa. burckhardti sp. nov.;, Aa. casuarinae (Froggatt);, Aa. dobsoni (Froggatt); (137),, Aa. huegelianae sp. nov.;, Aa. luehmannii sp. nov.;, Aa. torulosae sp. nov.