Arytinnis umbonata (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 : 436-437

Arytinnis umbonata (Loginova) comb. n.

(figure 21A)

Arytainilla umbonata Loginova, 1976: 30 ; Hodkinson and Hollis, 1987: 42.

Adult

Colour. Grey-green to yellow-green with pale yellow or orange thorax; forewing cells with small brown patches apically, veins uniform mid- or dark brown.

Description. Loginova (1976).

Nymph

Colour. First and third instars cream and orange, 4th–5th instars green or yellow with pink abdomens, with or without black tergites.

Fifth instar structure. Antennal segments seven.

Fifth instar measurements. (Specimens 6) BL: 1.45–1.75; BW: 0.95–1.1; WL: 0.56–0.6; CPL: 0.48–0.51; CPW: 0.65–0.7; RW: 0.16–0.19; HW: 0.61–0.68; AL: 0.95–1.07.

Fifth instar chaetotaxy. Head setae simple; ocular seta simple, inconspicuous, occasionally longer and darker; primary and secondary post-ocular setae narrowly or distinctly capitate. Dorsal thoracic setae short simple and long capitate. Forewing pad macrosetae 8–10, distinctly capitate, marginal (seven to nine outer margin, one proximal); hindwing pad macrosetae distinctly capitate, one or two marginal (one apical, one proximal), apical seta paired with small simple seta; proximal setae simple, narrowly or distinctly capitate; simple microsetae scattered on the wing pad surfaces. Dorsal abdominal pre-caudal macrosetae present on anterior tergites, long simple and capitate, caudal plate macrosetae absent; sectasetae three pairs (occasionally reduced fourth pair present); marginal abdominal setae (other than sectasetae) three pairs, distinctly capitate; pleurite setae paired capitate and simple. Legs with simple setae only.

Host plant. Genista tenera .

Distribution. Madeira.

Notes. Occurs throughout the host plant range from dry lowland to laurisilva habitat.

Biology. Eggs were found scattered on petioles and on the rim of floral bracts. Nymphs (1st–5th instars) observed on the calyx and corolla, and inside the flower on the stylar column.

Comment. Although the form of the adult genitalia is distinct, the 5th instar nymph is extremely similar to A. incuba , the only other Madeiran species, and to A. hakani from the Mediterranean.

Material examined. Madeira: 20 W, 20 X, 13 nymphs, Levada do Furado , W of Balcões, 900 m, 30 June 1998 ( DP 268 ) . 12 W, 15 X, 7 nymphs, just N of Ribeira Brava , ca 100 m, 1 July 1998 ( DP 270 ) . 15 W, 17 X, 3 nymphs, Pico do Gato , ca 1500 m, 2 July 1998 ( DP 272 ) . 26 W, 23 X, 17 nymphs, Encumeada, path to Pico Ruivo , ca 1050 m, 3 July 1998 ( DP 273.1 ) .