Takiyaella sexguttata ( Chiamolera & Cavichioli, 2003 ) Gonçalves & Domahovski, 2021

Gonçalves, Clayton C. & Domahovski, Alexandre C., 2021, A new genus and five new species of Neocoelidiinae leafhoppers from Brazil (Insecta: Hemiptera: Cicadellidae) with a key to males, European Journal of Taxonomy 775, pp. 34-61 : 53-57

Takiyaella sexguttata ( Chiamolera & Cavichioli, 2003) gen. et comb. nov.

Figs 10–11 , 12K–M , 13

Xenocoelidia sexguttata Chiamolera & Cavichioli, 2003: 199 : figs 1–7.

Diagnosis

Male pygofer ( Fig. 10D ) expanded apically, dorsal margin with small rounded lobe, caudal margin with ventral rounded lobe. Aedeagus ( Fig. 10I–K ) with atrial processes slender, curved dorsally, not following the curvature of shaft; shaft expanded apically, spatulate, with small lateral spiniform projections; anal tube ( Fig. 10L ) with basiventral process triangular.

Material examined

Holotype BRAZIL • ♂; Rio de Janeiro, Silva Jardim ; Mar. 1974; F.M. Oliveira leg.; DZUP-082927 ; DZUP. Paratypes BRAZIL – Rio de Janeiro • 1 ♂; same collection data as for holotype; DZUP-492337 ; DZUP • 1 ♀; same collection data as for holotype; VIII.1975; DZUP-492336 ; DZUP .

Description

MEASUREMENTS (mm). Holotype (♂): total length 6.1. Paratypes (♂): 6.1 (n = 1); (♀) 6.7 (n = 1). COLORATION. Pale yellow ( Fig. 12K–L ). Forewing ( Fig. 12K–L ) translucent, with three dark maculae on claval comissure: first, between base and second anal vein; second, between anal veins and third on apex of clavus and extending to brachial cell.

HEAD AND THORAX. External morphological characters as in generic description.

MALE TERMINALIA. Pygofer, in lateral view ( Fig. 10D ), 1.7 × as long as maximum height, expanded apically; dorsal margin concave medially with small preapical rounded lobe; caudal margin truncated with small ventral rounded lobe; ventral tooth slightly rounded; apical portion with inner integument thickening. Subgenital plate, in lateral view ( Fig. 10E ), subtriangular, 3.6 × as long as maximum height, narrowing at apical fourth; in ventral view ( Fig. 10F ), subrhomboid, lateral margins converging towards apex; ventral surface with pair of uniseriate rows of 4–5 macrosetae; apex acutely rounded. Connective ( Fig. 10G ) V-shaped, total length approximately ⅔ length of style; stem short. Style ( Fig. 10G–H ) with dorsal margin of apodeme rounded; apophysis elongated and robust. Aedeagus ( Fig. 10I–K ) with pair of atrial processes curved dorsally, with ⅓ length of shaft, anterior to curvature of shaft and not following its curvature broad at base and tapering towards apex; shaft slightly flattened dorsoventrally, apical portion expanded laterally, spatulate, lateral margins with some small spiniform projections. Anal tube ( Fig. 10L ) with sternite X long and tubular, basal portion with basiventral process triangular, with few denticles.

FEMALE TERMINALIA. Sternite VII ( Fig. 11A ) slightly wider than long; lateral margins constricted medially; posterior margin slightly emarginated. First valvula of ovipositor ( Fig. 11D ) with dorsal sculptured area areolate-strigate. Other characters as in generic description.

Remarks

Xenocoelidia sexguttata was described by Chiamolera & Cavichioli (2003) based on two males and one female from Rio de Janeiro, Brazil. Our study of the X. sexguttata types ( Figs 10–11 , 12K–L ) indicated the following morphological incongruities with the other species of Xenocoelidia : (1) male pygofer with caudal margin with small lobe without robust setae ( Fig. 10D ), whereas in other species of Xenocoelidia the caudal margin of pygofer is broadly rounded bearing several small and robust setae; (2) subgenital plates fused to each other in the basal two-thirds, with only the apical third being free ( Fig. 10F ), while in other species the subgenital plates are fused only at base, being free for most of its length; (3) connective with stem short ( Fig. 10G ), while in other species the connective is Y-shaped, with stem long; (4) style with preapical lobe moderately developed and slightly produced posterad ( Fig. 10H ), whereas other species of Xenocoelidia have the preapical lobe strongly developed and expanded laterally; and (5) aedeagus with shaft moderately long, wider at base, bearing atrial processes ( Fig. 10I ), while in other species of Xenocoelidia the aedeagus lacks atrial process, and the aedeagal shaft is very long and narrow in almost all its length. Based on these differences, we propose the transfer of X. sexguttata to Takiyaella gen nov.

Figures

Fig. 10. Takiyaella sexguttata (Chiamolera & Cavichioli, 2003) gen. et comb. nov., ♂, holotype (DZUP-082927). A. Head and thorax, dorsal view. B. Head, frontal view. C. Head and thorax, lateral view. D. Pygofer, lateral view. E. Valve and subgenital plate, lateral view. F. Valve and subgenital plate, ventral view. G. Styles and connective, dorsal view. H. Style, lateral view. I. Aedeagus, lateral view. J. Aedeagus, caudal view. K. Aedeagus, ventral view. L. Anal tube, lateral view. Scale bars: A–C = 1.0 mm; D–H, L = 0.5 mm; I–K = 0.4 mm.

Fig. 11. Takiyaella sexguttata (Chiamolera & Cavichioli, 2003) gen. et comb. nov., ♀, paratype (DZUP-492337). A. Sternite VII, ventral view. B. Pygofer and anal tube, lateral view. C. First valvula of ovipositor, lateral view. D. Apex of first valvula, lateral view. E. Second valvula of ovipositor, lateral view. F. Apex of second valvula, lateral view. G. Second valvifer and gonoplac, lateral view. H. Apex of gonoplac, lateral view. Scale bars: A–C, E, G = 0.5 mm; D, F, H = 0.3 mm.

Fig. 12. Habitus of type specimens, dorsal and lateral view, respectively. A–B. Takiyaella anomala gen. et sp. nov., ♂, holotype (DZRJ-AUCH #238). C–D. T. cavichiolii gen. et sp. nov., ♂, holotype (DZUP 492451). E–F. T. coelhomarquesae gen. et sp. nov., ♂, holotype (DZUP-083605). G–H. T. daniela gen. et sp. nov., ♂, holotype (DZRJ-AUCH #244). I–J. T. mejdalanii gen. et sp. nov., ♂, holotype (DZRJ- AUCH #246). K–L. T. sexguttata (Chiamolera & Cavichioli, 2003) gen. et comb. nov., ♂, holotype (DZUP-082927). M. Labels of the holotype of Xenocoelidia sexguttata. Scale bars: A–L = 2.0 mm.

Fig. 13. Distribution map of all known species of Takiyaella gen. nov.