Arytaina Foerster, 1848

Percy Csiro, Diana M., 2003, Legume-feeding psyllids (Hemiptera, Psylloidea) of the Canary Islands and Madeira, Journal of Natural History 37, pp. 397-461 : 441-442

Arytaina Foerster

Arytaina Foerster, 1848: 69 ; Loginova, 1977: 66; Hodkinson and Hollis, 1987: 10. Type species: Psylla spartii Hartig, 1841 (= Psylla genistae Latreille, 1804 ), designated by Oshanin, 1912: 128.

Amblyrhina Löw, 1879: 599 ; Loginova, 1977: 66. Type species: Psylla torifrons Flor , by monotypy; synonymized by Hodkinson and Hollis, 1987.

Psyllopa Crawford, 1911: 628 . Type species: Psyllopa magna Crawford , by original designation; synonymized by Crawford, 1914: 122.

Fifth instar structure. Forewing pads and abdomen broadly rounded apically. Antennal segments seven. Tergites extensively reduced on the thorax, typically not extending to the lateral margin on the abdomen. Arolium pad long, broadly expanded apically, usually with a distinct medial groove and long petiole. Circumanal ring broadly crescent-shaped with well-rounded anterior lobes, outer ring not contiguous with the apical abdominal margin and with a single row of pores.

Comment. Two of the Canary Island species originally described in Arytaina ( A. devia and A. nubivaga ) by Loginova (1976) were transferred to Arytainilla by Hodkinson and Hollis (1987) based on forewing shape and the peculiar forms of the male paramere. However, these species are now returned to Arytaina based on the following characters: absence of a costal break or pterostigma, shape of the male proctiger and the female genitalia, and reduced number of sectasetae in fifth instar nymphs. The two larger species, A. nubivaga and A. vittata sp. n., are most similar to A. genistae in general body and wing coloration, in the shape of the hindwing costal margin and the aedeagus hook, and in the relative segment lengths of the hind leg. In the same respects A. devia is more similar to A. adenocarpi . Any similarity in the paramere shape between A. devia and A. nubivaga may therefore be due to convergence.

Key to adults of the three Canary Island species of Arytaina 1 Forewing short and broad, length less than 2.5× width, widest in the apical third with

a broadly rounded apex, veins and apical cells (cu, m and m) with small dark

1 1 2

patches at the margin of the wing; hindwing costal margin slightly concave, not darkly

pigmented; antennae shorter than 1.9 mm; genal cones short (<0.14 mm); male

paramere apex with a single anteriorly and interiorly directed hook; hind leg tibia longer than the femur, tibia length 0.75× head width, apical and metatarsi relatively short, each about 0.25–0.35× tibia length (on Chamaecytisus ; Gran Canaria, Tenerife,

La Gomera, La Palma)............. devia Loginova – Forewing long and narrow, length greater than 2.5× width, margins more or less parallel, apex more acutely rounded, veins and apical cells without small dark patches

at the wing margin, but with extensive brown patches in the apical half of the wing; hindwing costal margin markedly concave and darkly pigmented; antennae long (> 1.9 mm); genal cones long (> 0.14 mm); male paramere apex with an interiorly directed double claw; hind leg tibia shorter than the femur, tibia length about 0.5× head width, apical and metatarsi long, each about 0.5× tibia length (figure 2D, F). 2

2 Abdomen without dark, longitudinal dorsal stripe; male paramere shorter (<0.33 mm) and broader, length less than 0.9× subgenital plate height, interior medial ridge weakly developed and supporting relatively long setae (visible clearly only in posterior view) (on Spartocytisus supranubius ; Tenerife) (figure 16B).... nubivaga Loginova

– Abdomen with dark, longitudinal dorsal stripe (more distinct in females); male paramere longer (> 0.33 mm) and narrower, length greater than 0.9× subgenital plate height, interior medial ridge extended inwards, such that inner margins of the ridge are virtually straight and nearly contiguous when parameres close, supporting short setae (visible clearly only in posterior view) (on Spartocytisus ; La Gomera, La Palma, El Hierro) (figures 15, 16A)............. vittata sp. n.

Key to 5th instars nymphs of the three Canary Island species of Arytaina

1 Antennae shorter than 1.1 mm; forewing pad shorter than 0.63 mm; dorsal thoracic setae short simple and long capitate; forewing and hindwing pads each with five or more capitate macrosetae on both wing pad surface and margins, proximal setae distinctly capitate; marginal abdominal pleurite setae paired capitate and simple; foreleg tibia with capitate setae present (on Chamaecytisus ; Gran Canaria, Tenerife, La Gomera, La Palma) (figure 22B)........... devia Loginova

– Antennae longer than 1.1 mm; forewing pad longer than 0.63 mm; dorsal thoracic setae short simple; forewing and hindwing pads typically each with one or two capitate (occasionally simple) macrosetae on the wing pad margin, surface and proximal setae small simple; marginal abdominal pleurite setae paired simple; foreleg tibia without capitate setae.................... 2

2 Abdominal sectasetae two pairs (in third and fourth positions); forewing pad length (> 0.7 mm) greater than 0.87× head width; circumanal ring width less than 0.25× caudal plate width; dorsal caudal plate with six macrosetae; middle and hind tibiae each with more than two capitate setae (on Spartocytisus supranubius ; Tenerife) (figure 22D)................ nubivaga Loginova

– Abdominal sectasetae one pair (in third position, apical pair small simple or rod setae); forewing pad length (<0.7 mm) less than 0.87× head width; circumanal ring width more than 0.25× caudal plate width; dorsal caudal plate with two macrosetae; middle and hind tibiae each with one capitate seta distally (on Spartocytisus ; La Gomera, La Palma, El Hierro) (figure 22C)............ vittata sp. n.