Tenucephalus manuensis, Zahniser, 2021

Zahniser, James N., 2021, Revision of the New World leafhopper tribe Faltalini (Hemiptera: Cicadellidae: Deltocephalinae) and the evolution of brachyptery, Zootaxa 4954 (1), pp. 1-160 : 113-115

Tenucephalus manuensis n. sp.

( Figs. 70 , 84 )

Diagnosis. T. manuensis can be identified by a combination of the – interstinctus color pattern, crown without dark markings near anterior margin, male pygofer with apical thorn-like process, connective-aedeagus with pair of relatively short basal processes, aedeagus with two pairs of apical processes, apical aedeagal processes directed dorsally, and ventral pair of apical aedeagal processes with preapical tooth.

Body. Male, 3.5–3.6 mm. Female, 3.9–4.1 mm to wing apex, 4.1–4.4 mm to ovipositor tip.

Color. With the – interstinctus color pattern. Crown without dark markings near anterior margin.

Male. Pygofer length more than 2x height at midlength; expanded subapically in lateral view; with ~15 long macrosetae posteriorly; with narrow thorn-like process apically, exceeding apex of pygofer side. Valve width about equal to 2x median length. Subgenital plate triangular; with ~8 single row of ~8 macrosetae near lateral margin; with numerous fine setae laterally. Style preapical lobe acutely angled, apex rounded; apophysis shaft thick; apex narrowly pointed, directed laterally, with dark callosity on posterior margin. Connective-aedeagus with pair of short symmetrical processes fused near aedeagal base, processes not reaching midlength of aedeagus, pointed apically. Aedeagus shaft broad in lateral view; with two pairs of apical processes about as long as aedeagus shaft directed dorsally and slightly posteriorly; ventral pair of processes slightly longer than dorsal pair, with preapical tooth on dorsal margin. Phragma membranous, with some indistinct setae. Segment X membranous.

Female. Sternite VII width less than 2x median length; posterior margin slightly produced along median 1/3; apex flat. Sternite VIII mostly membranous; irregularly wrinkled and exceeding anterior margin of stVII.

Material examined. HOLOTYPE: 1♂, PERU: Madre de Dios, Manu, Pakitza , 12°7’S 70°58’W, 250m., 9–14- IX-1988, O. Flint & N. Adams, trail 2, 1 st stream, malaise trap [ USNM] . PARATYPES: 4♂, 8♀, same data as ho- lotype . 7♂, 16♀, same data, except trail 1 . 13♂, 47♀, same data as holotype except 14–23-IX-1988 . 4♂, PERU: Madre de Dios, Manu, Pakitza , 11°56’S 71°18’W, 250m, 19–23-IX-1989, O. Flint & N. Adams, malaise trap . 3♂, 10♀, PERU: Madre de Dios, Rio Tambopata Res. , 30 air km SW Pto. Maldonado, 290m, 6–10-XI-1979, J.B. Hep- pner, subtropical moist forest. [ USNM]

Etymology. This species is named for its occurrence Manu National Park, Peru.

Distribution. T. manuensis is currently known only from the Madre de Dios region of Peru.

Remarks. T. manuensis was resolved as sister to T. interstinctus in the phylogenetic analyses here ( Fig. 91 ).

Figures

FIGUIRE 70. Tenucephalus manuensis n. sp. (A–B, D–H, J) standard views; A1 & B2, female; A2 & B1, male.

FIGUIRE 84. Distribution of Tenucephalus spp. and Virganana danasensis in northwestern South America.

FIGUIRE 91. Strict consensus tree from MP analysis of 51 morphological characters. Numbers below branches are MP bootstrap scores. The plesiomorphic condition is macroptery for both males and females (Hecalocorica bidentata ♂ shown in up- per left). Key stepwise transitions leading to brachyptery occur on clades A (char. 20; forewing of Hecullus bracteatus ♀ and hindwing of Acrolithus brevis ♀ shown), B (char. 22; Acrolithus brevis ♂ shown), and C (chars. 20 & 22; Dietrichana pampas ♀ shown).