Percyella gomerita 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 : 56

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

( Figs 83–85 , 274–276 , 302–305 )

urn:lsid:zoobank.org:act:03F07695-48AA-4179-ABA4-F34BA7A62A94

Material examined. Holotype ♂, La Gomera: Agulo, 28.1933 N, 17.1978 W, 240 m alt., 15.i.2022, Convolvulus floridus (S. Bastin) ( NHMB, dry mounted).

Paratypes. La Gomera: 7 ♂, 3 ♀, 24 immatures, Agulo, Chorro de Agulo , 28.1848 N, 17.1934 W, 260 m alt., 14.i.2022, C. floridus (S. Bastin) ( SBPC, slide mounted, 70% ethanol) ; 1 immature, Hemigua, La Poyatas, 28.1488 N, 17.1935 W, 310 m alt., 14.i.2022, C. floridus (S. Bastin) ( SBPC, 70% ethanol); 5 ♂ , 1 ♀, 8 immatures, Agulo, 28.1933 N, 17.1978 W, 240 m alt., 15.i.2022, C. floridus (S. Bastin) ( SBPC, slide mounted, 70% ethanol); 1 ♂ , 1 ♀, same data but ( MUSA, slide mounted, 70% ethanol); 1 ♂ , 1 ♀, 4 immatures, same data but ( NHMB, 70% ethanol) ; 2 immatures, Vallehermoso, 28.1792 N, 17.2628 W, 210 m alt., 15.i.2022, C. floridus (S. Bastin) ( SBPC, 70% ethanol) ; 2 ♀, Alajeró, Targa, 28.0612 N, 17.2258 W, 670 m alt., 16.i.2022, C. floridus (S. Bastin) ( SBPC, slide mounted, 70% ethanol) .

Description. Adult. Colouration of dry material. General body colour dark brown to black. Vertex green to brown yellowish, genal processes brown yellowish. Antenna brown yellowish with 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 black with pronotum white, and 2 white spots on each side of mesoscutum. Forewing transparent, veins brown. Abdominal sclerites dark brown, intersegmental membranes white. Male proctiger brown yellowish with black apex, paramere light brown yellowish with black apex, subgenital plate light brown yellowish, sometimes black basally. Female terminalia brown yellowish.

Structure. Body length 1.7–2.3. Vertex 0.6–0.8 times as long as broad. Genal processes 0.3–0.4 times as long as vertex. Antenna 2.5 times as long as head width. Metatibia 1.0–1.1 times as long as head width. Forewing 4.6–5.3 times as long as head width, 2.6–2.8 times as long as wide; vein M 1.9–2 times longer than vein M 1+2; m 1 cell value 1.4–1.8; vein Cu 1a 1.4–2.1 times longer than vein Cu 1; cu 1 cell value 1.0–1.2. Male terminalia as in Figs 83–85 . Proctiger 0.6 times as long as head width. Paramere 0.5 times as long as proctiger, with anterior margin curved, posterior margin straight basally, slightly curved apically and digitiform apical process with posterior margin straight, 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 ♂, 4 ♀). Head width ♂ 0.51, ♀ 0.52 – 0.56; vertex length ♂ 0.29 – 0.30, ♀ 0.30 – 0. 31; vertex width ♂ 0.19–0.23, ♀ 0.19–0.23; antenna length ♂ 1.29, ♀ 1.28 – 1.41; metatibia length ♂ 0.54 – 0.57, ♀ 0.52 – 0.57; forewing length ♂ 2.35 – 2,53, ♀ 2.62 – 2.86; forewing width ♂ 0.89 – 0.92, ♀ 1.0 – 1.11; male proctiger length 0.29 – 0.3; paramere length 0.14 – 0.15; distal segment of aedeagus length 0.17; female proctiger length 0.42; female anal ring length 0.14 – 0.15.

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

Etymology. Named after the Gomeros, the first settlers who inhabited La Gomera before the Castillian conquest in the 15 th century.

Host plant CI. Convolvulus floridus (Convolvulaceae) .

Distribution CI. La Gomera.

Biology. In the galls, we observed the presence of immatures and adults of a psyllid predator, Anthocoris salicis ( Fig. 306 ); also individuals of an ectoparasitic mite belonging to the family Trombidiidae , attached to the body of the adults and immatures.

Comments: Percyella gomerita differs from the other Percyella species in the paramere shape: the posterior margin is straighter than in the other three species and the posterior margin of the apical process is straight, without a hump (almost straight in P. benahorita , slightly sinuate in P. canari , sinuate in P. guanche ). Percyella gomerita also differs from the other species in its distribution, as it is found only in La Gomera. No characters were found to separate the females and immatures of P. gomerita 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.

FIGURES 297–307. (297–300) Percyella benahorita galls. (301) Percyella canari gall. (302–305) Percyella gomerita galls. (305) Anthocoris salicis. (307) Pseudococcidae sp.