Arytinnis fortunata, 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 : 420-422

Arytinnis fortunata sp. n.

(figures 5, 10D, 18A)

Adult

Colour. Pale green to mid-green; forewing clear, veins uniform light brown.

Structure. Surface forewing spinules present throughout all cells, but reduced in cell c+sc, medium density: 40–60 per 0.1 mm 2; apical spines in wing cells cu, 1 m and m, and few present in cell r. Antennae mid-length; genal cones short. Male 1 2 2

genitalia as in figure 5F–I; paramere simple, apex in dorsal view contiguous along inner margin (figure 10D). Female genitalia as in figure 5E; proctiger dorsal profile more or less straight.

Adult measurements and ratios. (4 W, 5 X) total length: W 2.92 –3.12, X 3–3.44; WL: W 2.33 –2.5, X 2.39–2.76; HW: W 0.77 –0.79; X 0.76–0.83; AL: 1.52–1.71; GC: 0.1–0.13; PB: 0.14–0.15. WLPT: 2.75–2.99; GCVL: 0.45–0.65; VLW: 0.4–0.49;

WLW: 2.38–2.53; CUR: 1.79–1.93; MR: 0.47–0.54; TLFL: 1.13–1.21. Adult genitalia W: MP: 0.26–0.27; PL: 0.36–0.37; AEL: 0.24–0.25; MSLH: 1.19–1.3; AHS: 0.3–0.31; PLSH: 1.13–1.2. X: FP: 0.61–0.72; FSP: 0.4–0.44; RL: 0.19–0.23; OV: 0.13–0.14; EL: 0.24–0.28.

Nymph

Colour. First and second instars orange and cream, 5th instars bright green.

Fifth instar structure. Antennal segments seven.

Fifth instar measurements. (Specimens 4) BL: 1.5–1.98; BW: 1–1.18; WL: 0.56–0.6; CPL: 0.41–0.56; CPW: 0.64–0.73; RW: 0.18–0.19; HW: 0.65–0.71; AL: 0.9–0.94.

Fifth instar chaetotaxy. Head setae simple; ocular seta simple, inconspicuous; primary post-ocular seta distinctly or occasionally narrowly capitate; secondary post-ocular seta simple. Dorsal thoracic setae short simple. Forewing pad with 9–11 macrosetae, marginal (three to five larger distinctly capitate and up to six smaller narrowly capitate or simple); hindwing pad with two apical macrosetae, distinctly capitate; proximal setae short simple; simple or rod microsetae scattered on the wing pad surfaces. Dorsal abdominal pre-caudal macrosetae present on anterior tergites, short simple, caudal plate macrosetae absent; sectasetae four pairs; marginal abdominal setae (other than sectasetae) three pairs, distinctly capitate; pleurite setae paired capitate and simple. Foreleg without capitate setae; middle leg capitate setae on tibia, one (distal); hind leg capitate setae on femur and tibia or tibia only (femur seta either capitate or simple), on tibia 3 (one larger distal, two smaller proximal and occasionally up to two small rod setae).

Host plant. Teline splendens .

Distribution. Canary Islands: La Palma.

Notes. The host plant distribution is restricted, found only locally in laurisilva habitat, however, A. fortunata sp. n. was relatively abundant in all locations sampled. This is one of two occurrences where a single psyllid species is associated with a single host species, and both psyllid and host plant are endemic to a single island. The other is A. romeria sp. n. on the host plant T. rosmarinifolia on Gran Canaria.

Biology. Eggs were found sparsely scattered on both sides of young leaves but mostly on the glaucous underside, and also scattered on fruit, towards the apex. Small nymphs (1st–2nd instars) were observed on leaf buds and fruit usually under the persistent calyx. Large nymphs (3rd–5th instars) were found in flowers, inside the anther tube on the developing ovary.

Etymology. Named for the ancient reference to the Canary Islands —Fortunatae Insulae—as the ‘Fortunate Islands’ and also because this species occurs on one of the most attractive species of Teline , T. splendens .

Type material. Holotype W (slide mounted), Canary Islands, La Palma: SE rd Santa Cruz to La Caldera, 28°42∞45◊N, 17°46∞W, ca 600 m, 20 May 1998 ( BMNH) . Paratypes 54 W, 57 X, 41 nymphs, as for holotype ( BMNH) . 2 W, 1 X, 5 nymphs, as for holotype ( DZUL) . 3 W, 2 X, 5 nymphs, as for holotype ( NHMB) .

Other material examined. La Palma: 22 W, 14 X, 25 nymphs, SE rd Santa Cruz to La Caldera 28°42∞30◊N, 17°46∞W, 790 m, 16 July 1997 (DP 78).