Magnana, Domahovski & Cavichioli, 2021

Domahovski, Alexandre Cruz & Cavichioli, Rodney Ramiro, 2021, Magnana, a new genus of Gyponini from Southeastern Brazil (Hemiptera: Cicadellidae: Iassinae), Papéis Avulsos de Zoologia (Pap. Avulsos Zool., S. Paulo) 61, pp. 1-5 : 2

Magnana gen. nov.

Figs. 1-17

Type species: Magnana splEndida sp. nov.

Diagnosis: Large-sized and robust ( Figs. 16, 17 ); head, in dorsal view, distinctly narrower than humeral pronotal width, moderately produced anterad, crown surface strongly rugose ( Figs. 1 , 16 ); frons rugose ( Fig. 2 ); crown-face transition distinct, slender but not foliaceous ( Figs. 3 , 17 ); appendix of forewing very narrow ( Fig. 4 ); metatarsomere I with two double rows of setae, setae not cuculate ( Fig. 5 ); pygofer lacking processes ( Fig. 8 ); connective Y-shaped ( Fig. 11 ); aedeagus bearing atrial processes ( Figs. 14, 15 ).

Description: Large-sized and robust. Head, dorsal view ( Figs. 1 , 16 ): distinctly narrower than pronotum, transocular width seven-tenths of pronotal humeral width, moderately produced anterad, median length longer than half interocular width, anterior margin of crown subtriangular, surface strongly rugose, slightly concave near anterior margin;ocellus small-sized,approximately equidistant between median line and eye margin, and between anterior and posterior margins of crown; coronal suture indistinct. Head, ventral view ( Fig. 2 ): face slightly wider than long; frontogenal sutures distant from eye margins by slightly less than maximum width of clypeus, surpassing antennal ledges, extended to anterior margin of crown; antennal ledge carinate, obliquely descending and slightly extended over frons; frons 1.6× longer than wide, texture rugose; epistomal suture indistinct; gena with deep striae, lateral margin excavated just below eyes, ventrolateral margin straight; maxillary plates reaching apex of clypeus; lora striate and rugose; clypeus 1.3× longer than its maximum width, lateral margins parallel, apex straight and carinated. Head, lateral view ( Figs. 3 , 17 ): crown-face transition distinct, slender but not foliaceous, irregular striae laterally, middle portion smooth; frons and clypeus not inflated.

Pronotum, dorsal view ( Fig. 1 ): deep transverse striae on disc and posterior half, anterior portion rugose; lateral margins long, 1.5× longer than eye length, carinate and convergent anterad; anterior margin broadly round; posterior margin excavated; lateral view ( Fig. 3 ): moderately declivous, head and pronotum in continuous slope; proepimeron with transverse striae. Mesonotum, dorsal view ( Fig. 1 ): longer than wide, rugose, lateral angles shagreen; scutellum flat in lateral view ( Fig. 3 ).

Forewing opaque, wide, 2.7× longer than maximum width ( Fig. 4 ); venation distinct, extra cross-veins or veinlets absent; texture finely rugose; three anteapical cells and five apical, vein R1 present; appendix very narrow.

Profemur: AD, AM and PD rows reduced and poorly defined, except for apical setae AD₁, AM₁ and PD₁, respectively; AV and PV including 3-4 and 3 setae respectively; IC row formed by slightly arched comb of fine setae,from distal third of femur to AM₁. Protibia: dorsal surface concave, round longitudinal carina adjacent to PD row; AV row formed by short setae, slightly longer and thicker toward apex, apical setae shorter than maximum diameter of protibia; AD and PD rows formed by undifferentiated setae, bearing few slightly longer and thicker intercalary setae; PV row with 7 longer setae intercalated by undifferentiated setae. Hind leg femoral setal formula 2:2:1. Metatibia: AD row lacking intercalary setae between macrosetae; PD, AD and AV rows bearing 20, 12 and 16 macrosetae, respectively. Metatarsomere I ( Fig. 5 ): two double rows of setae, base not cucullate; apex with 6 platellae. Metatarsomere II ( Fig. 5 ): apex with 4 platellae.

Male terminalia: Pygofer ( Fig. 8 ) lacking processes. Connective Y-shaped ( Fig. 11 ). Aedeagus bearing atrial processes ( Figs. 14, 15 ).

Female: Unknown.

Etymology: The generic name Magnana (feminine noun) is derived from the Latin word “magnus” meaning great or large. It refers to the fact this is one of the largest leafhoppers presently recorded for the tribe Gyponini . The suffix – ana is common in Gyponini genus names.

Distribution: Rio de Janeiro, Brazil.

Notes: As noted in the genus diagnosis, Magnana gen. nov. exhibits a singular combination of morphological features which readily separates this group from other genera in the tribe. Magnana gen. nov. shares a few traits with DEclivara DeLong & Freytag, 1971 and FlExana DeLong & Freytag, 1971 , such as: a large body; a rugose crown; a very narrow forewing appendix; and atrial processes in the aedeagus. However, Magnana gen. nov. differs in having a much narrower head as compared to the humeral width of pronotum; crown moderately produced anterad; crown-face transition distinct and slender; slightly declivorous pronotum; forewing lacking extra cross-veins; first tarsomere with two double rows of simple setae on ventral surface; and processes absent in the pygofer. In contrast, DEclivara and FlExana have a distinctly wide head; short crown, not produced; crown-face transition indistinct and thick; pronotum strongly declivous; forewing with extra cross-veins; first tarsomere with two simple rows of cucullate setae; and pygofer bearing processes.

Despite the similarities between these genera, their phylogenetic relationship still needs to be investigated based on morphological and/or molecular data.

Figures

Figures 1-15. Magnanasplendida sp.nov.,holotype male.(1) head and thorax,dorsalview.(2) head,ventral view.(3) head andthorax,lateralview.(4) forewing. (5) metatarsus, ventral view. (6) sternite VIII, ventral view. (7) valve, ventral view. (8) pygofer, valve and subgenital plate, lateral view. (9) Enlarged view of apical portionof pygofer,dorsal view.(10) subgenitalplate,ventral view.(11) connective,dorsalview.(12)style,dorsalview.(13)style,lateralview.(14) aedeagus,lateral view.(15) aedeagus,posterior view.

Figures 16-17. Magnana splendida sp.nov., holotype male,habitus.(16) dorsal view.(17) lateral view.