Metacostana cornuta, Domahovski & Cavichioli, 2023

Domahovski, Alexandre C. & Cavichioli, Rodney R., 2023, Eight new species of Costanana DeLong & Freytag (Hemiptera: Cicadellidae: Gyponini): taxonomic changes, key to males, and description of Metacostana gen. nov., European Journal of Taxonomy 889 (1), pp. 1-53 : 47-50

Metacostana cornuta gen. et sp. nov.

urn:lsid:zoobank.org:act:CBEDB543-D441-462A-87CE-035A9549A54D

Figs 26–28

Diagnosis

Pygofer ( Fig. 26G ), with robust process on ventroposterior margin, extending posterad and surpassing pygofer apex. Style ( Fig. 26K ), in lateral view, blade slender, evenly curved dorsally, with uniform height to near apex. Aedeagus ( Fig. 26L–M ) apodemal processes broad at base, curved dorsally, apex tapered, not surpassing apex of aedeagus; shaft with pair of short subapical processes extending laterally and abruptly curving anterad.

Etymology

The new species epithet comes from de Latin word ‘ cornutus ’ meaning ‘horned’. It alludes to the hornshaped process of the male pygofer.

Material examined

Holotype BRAZIL • ♂; “ Brasil, PR [Paraná], Antonina, \ R.P.P.N. [ Reserva Particular do Patrimônio Natural ] Guaricica , 25.316ºS 46.696ºW \ 31.I-04.II.2022, Luz solo, \ Entomologia UFPR”; DZUP 215498 .

Paratypes BRAZIL – Paraná • 5 ♂♂, 3 ♀♀; same collection data as for holotype; DZUP 215499 to 215511 • 3 ♂♂; same collection data as for holotype; DZRJ • 1 ♂; same collection data as for holotype; MNRJ • 1 ♂; same collection data as for holotype; MZSP • 4 ♂♂, 1 ♀; same collection data as for holotype, except “ 23-27.I.2023 ”; DZUP 214298 to 214304 • 1 ♂, 1 ♀; same collection data as for holotype, except “ 23-27.I.2023 ”; DZRJ • 1 ♀; “Brasil, PR, Antonina, R.P.P.N.\ Guaricica, 25.318963ºW, \ 48.653769ºW, 100m, 23-27.I.2023, Malaise susp. [suspensa], Trilha dos \ Pinheiros , Entomologia - UFPR”; DZUP 214297 • 1 ♂; “Antonina - PR [Paraná] \ Reserva Sapitanduva \ Brasil 19.I.1988 \ Lev. [Levantemento] Ent. [ Entomológico ] PROFAUPAR \ Lâmpada ”; DZUP 215512 • 1 ♀; “Morretes - PR [Paraná] Brasil \ (IAPAR) [Instituto Agronômico do Paraná] \ 21.I.1985 \ C.I.I.F. [Centro de Identificação de Insetos Fitófagos] ( Luminosa )”; DZUP 215513 • 1 ♀; same collection data as preceding, except “ 30.I.1985 ”; DZUP 215514 .

Other material

BRAZIL • 1 ♂, 1 ♀ (stored in ethanol); same collection data as for holotype; DZUP .

Description

MEASUREMENTS. Holotype male: 6.3 mm. Paratypes: males (n = 16), 6.3–6.5 mm; females (n = 8), 7.0– 7.1 mm.

COLORATION. Head and thorax ( Figs 26A–C , 28 ) yellowish-brown. Crown ( Fig. 26A ) with pair of round black spots behind ocelli, near posterior margin; eyes and ocelli red. Pronotum ( Fig. 26A ) with pair of small round black spots behind eyes, near anterior margin. Face ( Fig. 26B ) without maculae. Proepimeron ( Fig. 26C ) without maculae. Forewing ( Fig. 26D ) costal margin with pair of black maculae near base and midlength, yellow macula between black maculae, and white macula at level of outer anteapical cell and third and fourth apical cells; veins outlined by black; cross veins of inner discal cell black; apex of anal veins, first to third apical cells and appendix smoky; appendix with whitish macula on basal third. Legs yellowish-brown with basal half of mesotibia black.

MALE TERMINALIA. Sternite VIII ( Fig. 26E ) 1.1× as long as wide; lateral margins with triangular projection near base; apex broad, truncated, and weakly emarginated. Valve ( Fig. 26F ) 1.8× as wide as long; integument thickening present only on anterior margin; posterior margin rounded. Pygofer ( Fig. 26G ), in lateral view, 1.7× as long as maximum height; basodorsal process absent; ventral margin broadly rounded; posterodorsal margin rounded; robust process on ventroposterior margin, extending posterad and surpassing pygofer apex, with transverse thin rugae, apex abruptly tapered and acute; macrosetae distributed on posterodorsal quadrant; apex subtruncated. Anal tube (segment X) membranous, without processes. Subgenital plate ( Fig. 26G ), in lateral view, not surpassing apex of pygofer; in ventral view ( Fig. 26H ), 4× as long as wide, wider near base than apically; inner margin straight; outer margin rounded near base; apex abruptly tapered, subacute, well sclerotized. Connective ( Fig. 26I ) linear-shaped; arms not produced laterally; stalk almost as wide as width of arms, long, 2× as long as maximum width of arms; median keel well developed. Style ( Fig. 26J ), in dorsal view, with outer lobe strongly developed, parallel to blade, rounded; in lateral view ( Fig. 26K ), blade slender, evenly curved dorsally, with uniform height to near apex; ventral margin not serrated; apex tapered and subacute. Aedeagus ( Fig. 26L–M ) preatrium not developed; dorsal apodeme produced dorsally but not laterally, dorsal margin excavated, dorsolateral corners rounded; apodemal processes broad at base, curved dorsally, apex tapered, not surpassing apex of aedeagus; shaft cylindrical, curved dorsally, gradually tapering to apex; apical portion with pair of short subapical processes extending laterally and abruptly curving anterad.

FEMALE TERMINALIA. Sternite VII ( Fig. 27A–C ) 1.8× as wide as long; posterior margin roundly excavated near lateral angles, median third produced and bearing V-shaped notch at middle. Sternite VIII membranous. Pygofer ( Figs 27A–B ) about 2× as long as maximum height; apex broad and truncated; macrosetae dispersed on posteroventral quadrant and apex of dorsal portion. First valvifer ( Fig. 27D ) 1.5× as high as long, anterior and dorsal margins straight, posterior margin weakly produced medially, surface with dentiform cuticular projections. First valvula ( Fig. 27D ) slightly curved ventrally, 7.3× as long as high; ventral interlocking device long, reaching apical fourth; dorsal sculptured area strigate; apical portion ( Fig. 27E ) gradually tapered toward acute apex, with striations continuous with dorsal sculptured area. Second valvula ( Fig. 27F ) distinctly curved ventrally, 9× as long as high; dorsal prominence small, located before half length of blade; apical portion ( Fig. 27G ) with eight teeth; ventral margin without teeth or denticles. Gonoplac ( Fig. 27H ) 3.8× as long as high; ventral margin straight; external surface with dentiform cuticular projections and short macrosetae near apex; dorsoapical margin slightly rounded; apex abruptly tapered and subacute.

Figures

Fig. 26. Metacostana cornuta gen. et sp. nov., holotype, ♂ (DZUP 215498). A. Head and thorax, dorsal view. B. Head, ventral view. C. Head and thorax, lateral view. D. Forewing. E–M. Male terminalia. E. Sternite VIII, ventral view. F. Valve, anterior view. G. Pygofer, valve and subgenital plate, lateral view.H. Subgenital plate, ventral view. I. Connective, dorsal view. J. Style, dorsal view. K. Style, lateral view. L. Aedeagus, posterior view. M. Aedeagus, lateral view. Scale bars in mm.

Fig. 27. Metacostana cornuta gen. et sp. nov., paratype, ♀ (DZUP 215513). A. Apical portion of abdomen, ventral view. B. Apical portion of abdomen, lateral view. C. Sternite VII, ventral view. D. First valvifer and first valvula, lateral view. E. Apical portion of first valvula. F. Second valvulae, lateral view. G. Apical portion of second valvulae. H. Second valvifer and gonoplac, lateral view. I. Apical portion of gonoplac. Scale bars in mm.

Fig. 28. Metacostana cornuta gen. et sp. nov., holotype, ♂ (DZUP 215498). A. Habitus, dorsal view. B. Habitus, lateral view. Scale bar in mm.