Arytaina meridionalis Bastin, Burckhardt & Ouvrard, 2023

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 : 32-33

* Arytaina meridionalis Bastin, Burckhardt & Ouvrard sp. nov.

( Figs 55–58 , 141 )

urn:lsid:zoobank.org:act:E3F66617-2289-466A-8B5F-B51C430EDB86

Material examined. Holotype ♂, Gran Canaria: 1 ♂, Tejeda, iv.1986, brooms (E. Heiss) ( MHNG, dry mounted).

Paratypes. Gran Canaria: 1 ♂, 1 ♀, Pinar Tamadaba , 1230 m alt., 12.v.1993 (C. Lienhard) ( MHNG, dry mounted); 1 ♂ , 1 ♀ same data but ( NHMB, dry mounted); 7 ♂ , 5 immatures, Tejeda , Chamaecytisus proliferus ssp. meridionalis (D. Percy) ( DMPC, 70% ethanol); 16 ♂ , 14 ♀, 25 immatures, San Bartolome de Tirajana , 27.9083 N, 15.5750 W, 920 m alt., 16.iv.1998, C. proliferus ssp. meridionalis (D. Percy) ( DMPC, 70% ethanol) .

Description. Adult. Colouration as in Arytaina devia and A. insularis but apical cells of forewing without dark spots at the margin of cells m 1, m 2 and cu 1.

Structure. Body length 2.2–3.0 mm. Head in dorsal view, wider than thorax. Vertex subtriangular, 0.4–0.5 times as long as broad, covered with fine microsculture and very short setae; coronal suture fully developed. Genal processes short, 0.5–0.6 times as long as vertex, rounded, covered with long setae and with 1 long subapical seta along exterior margin at least 2 times longer than the others. Antenna 2.0–2.1 times as long as head width; segment 10 with 2 apical setae, 1 thinner and a little longer than the other. Metatibia 0.8 times as long as head width, with 1+3+1 apical spurs. Metabasitarsus with one black lateral spur. Forewing ( Fig. 141 ) elongate oval, 2.9–3.3 times as long as head width, 2.3–2.4 times as long as wide, with broad, evenly rounded apex, widest in apical third; vein C+Sc convex; pterostigma thin; vein Rs long, straight or slightly sinuate; vein M slightly arched, 1.3–1.5 times longer than vein M 1+2; m 1 cell value 1.8–2.1; vein Cu 1a arched, 1.6–1.8 times longer than vein Cu 1; vein Cu 1b short, straight, rounded in apical third; cu 1 cell value 1.6–1.8; surface spinules absent. Male terminalia as in Figs 55–57 . Proctiger slender, 0.4–0.5 times as long as head width, tubular, widest in basal half close to middle, anterior margin sinuate, covered with moderately long setae, excluding basal part and fine microsculpture in apical quarter. Paramere 0.7–0.8 times as long as proctiger, slender, in lateral view digitiform, gradually narrowing to apex, with pronounced posterior bulge at base, widest in basal third; apex forming a strongly sclerotised small forward-directed tooth; 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 mainly on basal half, though excluding base; long and thick setae present along anterior margin, sparse short setae on apical part. Distal segment of aedeagus as long as paramere, with relatively small hooked apical dilatation and with posterior margin angled basally; sclerotised end tube of ductus ejaculatorius curved. 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 as in Fig. 58 . Proctiger 0.9 times as long as head width; slightly longer than subgenital plate; dorsal margin, in lateral view, weakly concave, apex rounded; bearing long setae on apical half, mainly dorsally; with moderately long, sparse setae in proximal half, conate setae in apical third and a few short setae apically. Subgenital plate long, pointed apically, covered with conate setae and short setae, mainly in apical two thirds, and with moderately long setae ventrally. Valvula ventralis lacking ventral teeth.

Measurements (in mm) (4 ♂, 4 ♀). Head width ♂ 0.80–0.83, ♀ 0.81–0.84; vertex length ♂ 0.19–0.22, ♀ 0.20–0. 21; vertex width ♂ 0.48–0.50, ♀ 0.47–0.51; antenna length ♂ 1.59–1.71, ♀ 1.54–1.52; metatibia length ♂ 0.63–0.67, ♀ 0.63–0.65; forewing length ♂ 2.37–2.41, ♀ 2.69–2.71; forewing width ♂ 1.01–1.04, ♀ 1.11–1.14; male proctiger length 0.34–0.36; paramere length 0.26–0.27; distal segment of aedeagus length 0.27–0.28; female proctiger length 0.76–0.79; female anal ring length 0.21–0.23.

Fifth-instar immature. Similar to that of Arytaina insularis . Body 1.7–1.8 times as long as wide. Antenna twice as long as forewing pad. Caudal plate 0.7 times as long as wide.

Measurements (in mm) (3 individuals). Body length 2.1–2.3 mm; length of forewing pad 0.60–0.63.

Etymology. Named after its host plant, Chamaecytisus proliferus ssp. meridionalis .

Plant host. Chamaecytisus proliferus ssp. meridionalis (Fabaceae) .

Distribution CI. Gran Canaria.

Comments. Arytaina meridionalis resembles A. devia and A. insularis in the shape of the genal processes and the female terminalia, as well as in the body colour. The three species also share the same host species, Chamaecytisus proliferus . Arytaina meridionalis differs in the male terminalia and the shape and pattern of the forewing. It differs from A. devia in having a slender paramere and a less pronounced posterior bulge that is widest basally (bulge located in the middle in A. devia ), and in lacking the black spot on the margin of cells m 1, m 2 and cu 1 (present in A. devia ). Arytaina meridionalis differs from A. insularis in having a thicker paramere and a more pronunced basal posterior bulge. It differs also from the two other species in having an angled posterior margin of the apical dilatation of the distal segment of the aedeagus (rounded in A. devia and A. meridionalis ), in lacking the dark spot on the margins of cells m 1, m 2 and cu 1, and in having a straight or only slightly sinuate vein Rs (clearly sinuate in A. devia and A. insularis ), and vein Cu 1a more than 1.5 times longer than vein Cu 1 (<1.5 in A. devia and A. insularis ). The three species also differ in their distributions: A. devia occurs in Tenerife and La Gomera, A. meridionalis in Gran Canaria, and A. insularis in La Palma.

Material reported from Gran Canaria as A. devia insularis ( Loginova 1976; Percy 2003) concerns A. meridionalis sp. nov.

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.