Arytaina insularis Loginova, 1976

Bastin, Saskia, Burckhardt, Daniel, Reyes-Betancort, Alfredo, Hernández-Suárez, Estrella & Ouvrard, David, 2023, A review of the jumping plant-lice (Hemiptera: Psylloidea) of the Canary Islands, with descriptions of two new genera and sixteen new species, Zootaxa 5313 (1), pp. 1-98 : 31-32

* Arytaina insularis Loginova, 1976 , stat. nov.

( Figs 51–54 , 136–140 )

Arytaina devia insularis Loginova, 1976: 16 ; Percy 2003: 443.

Material examined. Lectotype (designated by Percy 2003: 444). 1 ♂, La Palma : El Paso, 26.v.1947 (H. Lindberg) ( FMNH, dry mounted).

La Palma: 1 ♂, El Paso, 6.viii ( R. Frey) ( FMNH, dry mounted); 10 ♂, 8 ♀, road to La Cumbrecita, 28.6583 N, 17.8458 W, 900 m alt., 16.v.1998, Chamaecytisus proliferus ssp. palmensis (D. Percy) ( DMPC, 70% ethanol, slide mounted); 2 ♂ , 2♀, 4 immatures, same data but ( NHMB, slide mounted) #DP-189; 1 ♂ , 1 ♀, parque nacional de la Caldera de Taburiente, Barranco de Risco Liso , 850 m alt., 31.viii.1999, C. proliferus (T. Domingo-Quero) ( NHMB, dry mounted); 5 ♂ , 5 ♀, parque nacional de la Caldera de Taburiente, playa de Taburiente, 750 m alt., 3.iv.2000 ( T. Domingo-Quero) ( NHMB, dry mounted) .

Redescription. Adult. Colouration. Described by Percy (2003); apical cells of forewing with dark or light brown spot at margin of cells cu 1, m 1 and m 2.

Structure. Body length 2.0–3.0 mm. Head in dorsal view, wider than thorax. Vertex ( Fig. 136 ) subtriangular, 0.4–0.6 times as long as broad, covered with fine microsculture and very short setae; coronal suture fully developed. Genal processes short, 0.4–0.6 times as long as vertex, rounded, covered with long setae and and with the longest seta present subapically along exterior margin ( Fig. 137 ), at least 2 times longer than others. Antenna ( Fig. 138 ) 2.0–2.3 times as long as head width; segment 10 with 2 apical setae, 1 thinner and a little longer than the other. Metatibia 0.8–0.9 times as long as head width, with 1+3+1 apical spurs. Metabasitarsus with 1 black lateral spur. Forewing ( Figs 139, 140 ) elongate oval, 3.1–3.5 times as long as head width and 2.3–2.5 times as long as wide, with broad, evenly rounded apex; widest in apical third; vein C+Sc convex; pterostigma thin; vein Rs long, slightly sinuate; vein M slightly arched, 1.5–1.6 times longer than vein M 1+2; m 1 cell value 1.8–2.0; vein Cu 1a arched, 1.3–1.4 times longer than vein Cu 1; vein Cu 1b short, straight, rounded in apical third; cu 1 cell value 1.9–2.2; surface spinules absent. Male terminalia as in Figs 51–53 . Proctiger slender, 0.5 times as long as head width, tubular, widest in basal third close to middle, anterior margin sinuate, covered with moderately long setae, excluding basal part and fine microsculture in apical fourth. Paramere 0.7–0.8 times as long as proctiger, slender, in lateral view digitiform, more-or-less parallel sided and narrow with weakly pronounced posterior bulge at base, apex forming a strongly sclerotised small forward-directed tooth; with outer face covered with short setae in apical two thirds near posterior margin, moderately long setae in middle and near anterior margin, which are thicker and a little longer than the others; inner face densely covered with moderately long setae in basal third, mainly in middle, long and thick setae present along anterior margin, sparse moderately long setae in apical third. Distal segment of aedeagus as long as paramere, with relatively small hooked apical dilatation and with posterior margin rounded basally; sclerotised end tube of ductus ejaculatorius curved and projecting above dorsal margin. Subgenital plate almost as long as high, in lateral view broadly subglobular, sparsely covered with short setae and with a group of long setae on ventral and posterior margins. Female terminalia long, slender ( Fig. 54 ). Proctiger as long as head width, slightly longer than subgenital plate, dorsal margin, in lateral view, weakly concave; bearing long setae on dorsal margin, mainly on apical part, moderately long setae sparse in anterior half, also with conate setae present in apical third and a few short setae on apical part. Subgenital plate long, pointed apically, covered with conate setae and short setae, mainly in apical two thirds, and with moderately long setae along ventral margin. Valvula ventralis lacking ventral teeth.

Measurements (in mm) (3 ♂, 4 ♀). Head width ♂ 0.77–0.80, ♀ 0.84–0.87; vertex length ♂ 0.18–0.21, ♀ 0.22–0. 31; vertex width ♂ 0.46–0.47, ♀ 0.50–0.51; antenna length ♂ 1.72–1.74, ♀ 1.40–1.70; metatibia length ♂ 0.70–0.73, ♀ 0.66–0.74; forewing length ♂ 2.42–2,58, ♀ 2.80–3.06; forewing width ♂ 1.01–1.04, ♀ 1.20–1.29; male proctiger length 0.40–0.41; paramere length 0.28–0.31; distal segment of aedeagus length 0.27–0.30; female proctiger length 0.84–0.91; female anal ring length 0.23–0.25.

Fifth-instar immature. Percy (2003).

Host plant CI. Chamaecytisus proliferus ssp. proliferus var. palmensis (Fabaceae) .

Distribution CI. La Palma ( Loginova 1976; Percy 2003; both recorded as Arytaina devia insularis ).

Comments. Arytaina insularis resembles morphologically A. devia and A. meridionalis sp. nov. in the shape of the genal processes, the female terminalia and the forewing, as well as the body colour. These three species also share the same host species, Chamaecytisus proliferus . It differs in the male terminalia and the shape and the pattern of the forewing. Arytaina insularis differs from A. devia in having a slender paramere and a less pronounced posterior bulge that is widest basally (widest in the middle in A. devia ); and the brown spot on the margin of cells m 1, m 2 and cu 1 (black in A. devia ). Arytaina insularis differs from A. meridionalis in having a thinner paramere, a less pronounced basal posterior bulge, and a rounded posterior margin of the apical dilatation of the distal segment of the aedeagus (angled in A. meridionalis ). It differs also from A. devia and A. meridionalis in lacking the dark spot on the margin of cells m 1, m 2 and cu 1, and in having longer female terminalia (proctiger length: A. insularis > 0.84 mm, A. devia and A. meridionalis <0.80 mm). The three species also differ in their distributions: A. devia is present in Tenerife and La Gomera, A. meridionalis in Gran Canaria, and A. insularis in La Palma.

Figures

FIGURES 46–58. (46–50) Diaphorina gonzalezi: (46) male terminalia, lateral view; (47) paramere, inner surface, lateral view; (48) basal segment of aedeagus, lateral view; (49) distal segment of aedeagus, lateral view; (50) female terminalia, lateral view. (51–54) Arytaina insularis: (51) male terminalia, lateral view; (52) paramere, inner surface, lateral view; (53) distal segment of aedeagus, lateral view; (54) female terminalia, lateral view. (55–58) Arytaina meridionalis: (55) male terminalia, lateral view; (56) paramere, inner surface, lateral view; (57) distal segment of aedeagus, lateral view; (58) female terminalia, lateral view.

FIGURES 132–141. (132–135) Arytaina devia: (132) paramere, inner surface, lateral view; (133) distal segment of aedeagus, lateral view; (134) female terminalia, lateral view; (135) forewing. (136–140) Arytaina insularis: (136) head, dorsal view; (137) setae of paramere; (138) antenna; (139, 140) forewing. (141) Arytaina meridionalis, forewing.