Percyella guanche 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 : 57

* Percyella guanche Bastin, Burckhardt & Ouvrard sp. nov.

( Figs 86–88 , 277–280 )

urn:lsid:zoobank.org:act:8281DBD3-3224-4062-BB06-20E3898EC10A

Material examined. Holotype ♂, Tenerife: Puerto de la Cruz, 28.5519 N, 16.3430 W, 70 m alt., 22.iii.2022, Convolvulus floridus (S. Bastin) ( NHMB, dry mounted).

Paratypes. La Palma: 1 ♂, 4 ♀, 3 immatures, El Paso, 28.6493 N, 17.9015 W, 390 m alt., 8.i.2022, C. floridus (S. Bastin) ( SBPC, slide mounted, 70% ethanol). Tenerife : 1 ♀, parque rural de Anaga, Base of Roque de En medio, above town of Taganana, 300 m alt., 25.iv.1998, C. floridus (D. Percy) ( DMPC, slide mounted) ; 8 immatures, Masca, Barranco de Masca , 400 m alt., 23.ii.2005, C. floridus (D. Burckhardt) ( NHMB, slide mounted); 7 ♂ , 8 ♀, 2 immatures, Tegueste, 28.5211 N, 16.3353 W, 410 m alt., 20.viii.2020, C. floridus (S. Bastin) ( SBPC, 70% ethanol); 1 ♂ , 22 immatures Buenavista del Norte , 28.3694 N, 16.8495 W, 130 m alt., 1.iii.2022, C. floridus (S. Bastin) ( SBPC, slide mounted, 70% ethanol); 1 ♂ , 9 immatures, El Tanque, 28.3664 N, 16.7749 W, 320 m alt., 1.iii.2022, C. floridus (S. Bastin) ( SBPC, slide mounted, 70% ethanol) ; 2 immatures, Garachico, El Guincho, 28.3735 N, 16.7451 W, 70 m alt., 1.iii.2022, C. floridus (S. Bastin) ( SBPC, 70% ethanol). 1 ♂ , 3 ♀, 20 immatures, Puerto de la Cruz, 28.5519 N, 16.3430 W, 70 m alt., 22.iii.2022, C. floridus (S. Bastin) ( SBPC, slide mounted, 70% ethanol) ; 1 ♀, 5 immatures, same data but ( NHMB, 70% ethanol); 1 ♂ , 2 immatures, Taganana, 28.5651 N, 16.2143 W, 100 m alt., 6.iii.2022, C. floridus (S. Bastin) ( SBPC, 70% ethanol) ; 22 immatures, Las Gaviotas, 28.5159 N, 16.1768 W, 130 m alt., 16.iii.2022, C. floridus (S. Bastin) ( SBPC, 70% ethanol) ; 15 immatures, Bajamar, 28.5527 N, 16.3431 W, 64 m alt., 16.iii.2022, C. floridus (S. Bastin) ( SBPC, slide mounted, 70% ethanol) .

Description. Adult. Colouration of dry material. General body colour dark brown. Vertex brown yellowish, genal processes brown yellowish. Antenna brown yellowish, segments 3–6 each with black apex, segments 7 and 8 each with apical half black, and segments 9 and 10 entirely black. Thoracic dorsum dark brown yellowish to dark brown with two light yellow spots on each side of mesoscutum. Forewing transparent, veins brown. Abdominal sclerites dark brown yellowish to dark brown, intersegmental membranes yellow. Male proctiger brown yellowish; paramere brown yellowish with black apex; subgenital plate brown yellowish, sometimes black basally. Female terminalia brown yellowish.

Structure. Body length 1.5–1.9. Vertex 0.6–0.8 times as long as broad. Genal processes 0.2–0.3 times as long as vertex. Antenna 1.9–2.9 times as long as head width. Metatibia 0.9–1.1 times as long as head width. Forewing 4.4–4.9 times as long as head width, 2.4–2.7 times as long as wide; vein M 1.7–2.3 times longer than vein M 1+2; m 1 cell value 1.3–1.8; vein Cu 1a 1.5–2.3 times longer than vein Cu; cu 1 cell value 0.8–1.2. Male terminalia as in Figs 86–88 . Proctiger 0.6 times as long as head width. Paramere 0.5 times as long as proctiger, sub-parallel with anterior margin slightly curved, posterior margin straight then curved apically, digitiform apical process with posterior margin sinuate, forming a strongly sclerotised small, posteriorly directed tooth. Apical segment of aedeagus 1.1 – 1.2 times as long as paramere. Female proctiger 0.8 times as long as head width; circumanal ring 0.3–0.4 as long as proctiger.

Measurements (in mm) (3 ♂, 5 ♀). Head width ♂ 0.46–0.51, ♀ 0.47–0.58; vertex length ♂ 0.18, ♀ 0.17–0.24; vertex width ♂ 0.27–0.29, ♀ 0.26–0.32; antenna length ♂ 1.34–1.45, ♀ 0.91–1.28; metatibia length ♂ 0.50–0.57, ♀ 0.48–0.54; forewing length ♂ 2.07–2.3, ♀ 2.42–2.541; forewing width ♂ 0.78–0.87, ♀ 0.91–1.05; male proctiger length 0.28–0.30; paramere length 0.14–0.16; distal segment of aedeagus length 0.17; female proctiger length 0.36– 0.41; female anal ring length 0.11–0.14.

Fifth-instar immature. Corresponding to the generic description, see also comments below.

Etymology. Named after the Guanches, the pre-Castillian inhabitants of Tenerife who were defeated in the Battle of Aguere by the Castillians.

Host plant CI. Convolvulus floridus (Convolvulaceae) .

Distribution CI. Tenerife, adventive in La Palma. Percyella guanche is native to Tenerife. Its presence in an urban environment in La Palma suggests an accidental introduction along with the host plant.

Biology. In the galls, we observed immatures and adults of the predator Anthocoris salicis Lindberg ( Hemiptera : Anthocoridae ), also ectoparasitic mites (Prostigmata: Trombidiidae ) attached to both adults and immatures ( Fig. 277 ).

Comments. Percyella guanche differs from the other Percyella species in the paramere shape: the posterior and anterior margins are almost parallel (not parallel in P. benahorita , P. gomerita or P. canari ); also the posterior margin of the apical process is sinuate with a hump (almost straight in P. benahorita , straight in P. gomerita and slightly sinuate in P. canari ). No characters were found to separate the females and immatures of P. guanche from its other congeners.

Figures

FIGURES 76–88. (76–79) Percyella benahorita: (76) male terminalia, lateral view; (77) paramere, inner surface, lateral view; (78) distal segment of aedeagus, lateral view; (79) female terminalia, lateral view. (80–82) Percyella canari: (80) male terminalia, lateral view; (81) paramere, inner surface, lateral view; (82) distal segment of aedeagus, lateral view.(83–85) Percyella gomerita: (83) male terminalia, lateral view; (84) paramere, inner surface, lateral view; (85) distal segment of aedeagus, lateral view. (86–88) Percyella guanche: (86) male terminalia, lateral view; (87) paramere, inner surface, lateral view; (88) distal segment of aedeagus, lateral view.

FIGURES 269–280. (269–271) Lauritrioza laurisilvae: (269, 270) adult, habitus; (269) lateral view; (270) dorsal view; (271) immature. (272, 273) Percyella canari: adult, habitus; (272) lateral view; (273) dorsal view. (274–276) Percyella gomerita, adult, habitus, dorsal view. (277–280) Percyella guanche: (277) Acari attached to the abdomen; (278) adult, habitus, dorsal view; (279, 280) immature. Photographs 269 and 270 by Alfonso Peña Darias.