Acuthana transgressa, Domahovski & Cavichioli, 2018

Domahovski, Alexandre C. & Cavichioli, Rodney R., 2018, Two new remarkable genera and two new species of Gyponini (Hemiptera: Cicadellidae: Iassinae) from Brazil, European Journal of Taxonomy 476, pp. 1-17 : 7-8

Acuthana transgressa gen. et sp. nov.

urn:lsid:zoobank.org:act:4D49EB9F-BCF4-441E-8BC5-4ED024F970C0

Figs 2 –22, 44–45

Diagnosis

As for genus.

Etymology

The new species name comes from the Latin word ‘ transgressus ’ and means ‘crossed’. It refers to the process of both styles, which overlap in dorsal view.

Material examined

Holotype

BRAZIL: ♂, Central-West Region, Mato Grosso, Sinop, “ Brasil Mato Grosso \ Sinop \ X.1975 \ M. Alvarenga Leg ” ( DZUP 215369 ).

Paratype

BRAZIL: 1 ♀, “ Brasil, MT, Nova Ubiratã,\ E.S.E.C. Rio Ronuro ,\ 13.1122º S, 54.4436º W, 330 m \ light trap, 11-16.vi.2017, RR\ Cavichioli & AC Domahovski ” ( DZUP 215370 ).

Description

MORPHOLOGY. External morphological characters as in generic description.

COLORATION (male and female). Head and thorax ( Figs 44 –45) yellowish brown. Crown, pronotum and mesonotum ( Figs 2, 4 ) without maculae. Face ( Fig. 3 ) without maculae. Pronotum ( Fig. 2 ) with disk dark-brown. Mesonotum ( Figs 2 , 45) with lateral angles dark brown. Forewing ( Figs 5 , 45) yellowishbrown; anterior half opaque with many punctuate dark-brown spots; apex of 2A vein, apex of clavus and posterior half of wing dark brown; appendix light yellow with two black maculae on base and midportion. Legs ( Figs 44 –45) yellowish brown. Foreleg with black maculae on anterior surface near apex.

MALE TERMINALIA. Sternite VIII ( Fig. 6 ), triangular, very long, longer than wide; anterolateral angles excavated, posterolateral margins straight; apex narrow and rounded. In ventral view, valve ( Fig. 7 ), 1.6 times as wide as long; integument thickening present only on dorsal margin; ventral margin rounded. Pygofer ( Fig. 8 ), 1.7 times as long as maximum height laterally; anteroventral margin lobed and rounded; apex rounded; macrosetae dispersed on posterodorsal quadrant and some setae near ventral margin. In lateral view, subgenital plate ( Fig. 8 ), produced posteriorly as far as pygofer apex; ventrally ( Fig. 9 ), 3.7 times as long as wide, wider near base and tapered toward apex; setae on ventral surface and external margin; apex very narrow. Connective ( Fig. 10 ) T-shaped dorsally, slightly wider than long; arms wide; stalk very elongate, slightly curved laterally; apex broadened; laterally ( Fig. 11 ), arms wide and high, about half of style length; stalk with translucent and conspicuous keel dorsally. In dorsal view, style ( Fig. 10 ) very elongated, narrow; outer lobe conspicuous and rounded; blade with long process on apical third, narrower than blade on base and wider at mid-length, apex acute directed posteromesad; microsetae present near outer lobe; laterally ( Fig. 12 ), ventral margin not serrated; blade process straight, with some concavities on ventral surface, longer than style apex; apex of blade curved dorsolaterally. Aedeagus ( Figs 13–14 ) with preatrium developed; dorsal apodeme strongly developed dorsolaterally; atrial processes very short, directed posterad; shaft short, flattened laterally, pair of slender and membranous processes at mid-length of shaft, as long as shaft; posterior margin with single process adjacent to shaft, shorter than shaft, apex acute; shaft apex blunt, without processes.

FEMALE TERMINALIA. Sternite VII ( Fig. 15 ) 1.6 times as wide as long; posterior margin slightly excavated near lateral angles and with small V-shaped notch at middle. Sternite VIII membranous. Pygofer ( Figs 15 – 16) elongate, about two times as long as maximum height; apex truncated; macrosetae dispersed on posterior half, with some larger macrosetae near ventral margin. First valvifer (Fig. 17) 1.5 times as high as long, anterior and dorsal margins straight, posterior margin rounded. First valvula (Fig. 17) straight; about 7.5 times as long as high; higher at mid-length; gradually tapered toward apex; apex (Fig. 18) acute, sculptured area strigate. Second valvula (Fig. 19) elongated; approximately seven times as long as high; with rounded tubercle at mid-length; apical portion (Fig. 20) with irregular teeth; apex tapered and acute. Gonoplac (Fig. 21) 3.8 times as long as high; ventral margin straight, dorsoapical margin slightly rounded; apex acute.

Figures

Figs 15─22. Acuthana transgressa gen. et sp. nov., paratype, ♀ (DZUP 215370), terminalia. 15. Sternite VII and pygofer, ventral view. 16. Pygofer and valvulae, lateral view. 17. First valvifer and first valvula, lateral view. 18. Apex of first valvula, lateral view. 19. Second valvula, lateral view. 20. Apex of second valvula, lateral view. 21. Second valvifer and gonoplac, lateral view. 22. Apex of gonoplac. Scale bars: 15–16 = 1.0 mm; 17, 19, 21 = 0.5 mm; 18, 20, 22 = not to scale.

Figs 44─47. Type material, habitus. 44–45. Acuthana transgressa gen. et sp. nov. 44. Holotype, ♂ (DZUP 215369), dorsal view (upper) and lateral view (lower). 45. Paratype, ♀ (DZUP 215370), dorsal view (upper) and lateral view (lower). 46–47. Rectapona nigrifascia gen. et sp. nov. 46. Holotype, ♂ (DZUP 215371), dorsal view (upper) and lateral view (lower). 47. Paratype, ♀ (DZUP 215369), dorsal view (upper) and lateral view (lower). Scale bars: 2.0 mm.

Figs 2–14. Acuthana transgressa gen. et sp. nov., holotype, ♂ (DZUP 215369). 2. Head and thorax, dorsal view. 3. Head, frontal view. 4. Head and thorax, lateral view. 5. Forewing. 6–14. Male terminalia. 6. Sternite VIII, ventral view. 7. Valve, anterior view. 8. Pygofer, valve and subgenital plate, lateral view. 9. Subgenital plate, ventral view. 10. Style and connective, dorsal view. 11. Connective, lateral view. 12. Style, lateral view. 13. Aedeagus, lateral view. 14. Aedeagus, posterior view. Scale bars: 2–4 = 1.0 mm; 5 = 2.0 mm; 6–10, 12 = 0.5 mm; 11, 13–14 = 0.25 mm.