Arytinnis nigralineata (Loginova) Percy Csiro, 2003

Percy Csiro, Diana M., 2003, Legume-feeding psyllids (Hemiptera, Psylloidea) of the Canary Islands and Madeira, Journal of Natural History 37, pp. 397-461 : 413-414

Arytinnis nigralineata (Loginova) comb. n.

(figures 2H, C, 17C)

Arytainilla nigralineata Loginova, 1976: 19 ; Hodkinson and Hollis, 1987: 42.

Adult

Colour. Bright green, lacking the darker coloration in mature specimens characteristic of A. proboscidea ; head and genal cones with darkly pigmented setae. Forewing cells with faint brown patches, veins with numerous short, light and dark bands.

Description. Loginova (1976).

Nymph

Colour. First and second instars pale orange or cream, 3rd-5th instars pale green to bright green or orange and cream, with or without black tergites.

Fifth instar structure. Antennal segments nine.

Fifth instar measurements. (Specimens 7) BL: 1.55–1.85; BW: 0.98–1.13; WL: 0.51–0.55; CPL: 0.46–0.51; CPW: 0.62–0.7; RW: 0.17–0.19; HW: 0.69–0.74; AL: 0.99–1.18.

Fifth instar chaetotaxy. Head setae simple; ocular seta simple, dark, conspicuous; primary and secondary post-ocular setae simple or narrowly capitate. Dorsal thoracic setae long, simple and narrowly capitate. Forewing and hindwing pads with simple or narrowly capitate setae; each pad with two macrosetae, marginal (one apical, one proximal); hindwing pad apical seta paired with small simple seta; simple microsetae scattered on the wing pad surfaces. Dorsal abdominal pre-caudal macrosetae present on anterior tergites, long simple and narrowly capitate, caudal plate macrosetae, usually four simple or narrowly capitate; sectasetae three pairs; marginal abdominal setae (other than sectasetae) three pairs, distinctly capitate; pleurite setae paired simple or slightly capitate. Legs with simple setae only.

Host plant. Adenocarpus foliolosus .

Distribution. Canary Islands: Gran Canaria, Tenerife and La Gomera.

Notes. Occurs on the two central islands and one western island, where it is restricted to lower altitudes and more humid habitats than the other Adenocarpus - feeding species, A. proboscidea . It can also be found sympatrically with A. proboscidea in the extensive host hybrid zone between Adenocarpus foliolosus and Adenocarpus viscosus on Tenerife, and occasionally on Adenocarpus viscosus where this host is found at lower altitudes on the humid, northern pine forest slopes.

Biology. Eggs were found in inflorescences on the inner surface of bracts. Nymphs were frequently observed on inflorescences.

Material examined. Canary Islands, Gran Canaria: 26 W, 20 X, 50 nymphs, 1–2 km S of Cruz de Tejeda, 27°59∞30◊N, 15°36∞W, 1480 m, 5 July 1997 (DP 36). 9 W, 10 X, 1 nymph, just below Pinos de Gáldar, 28°2∞30◊N, 15°37∞30◊W, 1400 m, 6 July 1997 (DP 43). 19 W, 14 X, rd Moya to San Bartolomé de Fontanales, 28°5∞45◊N, 15°35∞15◊W, ca. 700 m, 19 April 1998 (DP 170). Tenerife: 20 WX, La Esperanza, 1 July 1966, Guichard and Ward (BMNH). 5 W, 9 X, 2 nymphs, 5 km NE of Las Canteras, 28°31∞N, 16°18∞W, 700 m, 30 June 1997 (DP 29). 4 W, rd La Laguna to El Teide, ca. 20 m before turning to Arafo, 28°23∞30◊N, 16°26∞30◊W, 1650 m, ex Adenocarpus hybrids, viscosus x foliolosus , 9 July 1997 (DP 52). 31 W, 16 X, 8 nymphs, 3–5 km above Las Raíces, 28°25∞N, 16°23∞30◊W, 1350 m, 11 April 1998 (DP 156). La Gomera: 112 W, 72 X, 30 nymphs, rd from Arure to Las Hayas, 28°7∞30◊N, 17°18∞30◊W, 900 m, 13 July 1997 (DP 67). 30 W, 30 X, 23 nymphs, nr Tamagarda and Las Rosas, 28°11∞30◊N, 17°13∞30◊W, ca. 600 m, 26 May 1998 (DP 223).