Amplicephalus (Nanctasus) paralbivenosus

Duan, Yani & Dietrich, Christopher H., 2018, Notes on the Neotropical leafhopper subgenus Amplicephalus (Nanctasus) Linnavuori (Hemiptera: Cicadellidae: Deltocephalinae: Deltocephalini) with description of two new species, Zootaxa 4455 (3), pp. 555-562: 558-559

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Amplicephalus (Nanctasus) paralbivenosus

sp. n.

Amplicephalus (Nanctasus) paralbivenosus  sp. n.

( Figs 4–6View FIGURE 4View FIGURE 5View FIGURE 6)

Length. Male: 3.6 mm; female: 3.9–4.1 mm.

Coloration and morphology. Ground color pale brown marked with brown, dark brown ( Fig. 4A–D View Figure ). Crown white with brown, dark brown marks ( Fig. 4A–C View Figure ). Pronotum with irregular T-shaped white medial marking surrounded by orange brown pigment, four dark brown anterior spots and six orange brown posterior stripes ( Fig. 4A–C View Figure ). Mesonotum with symmetrical orange brown markings ( Fig. 4A–C View Figure ). Face mostly brown, with paired white marks ( Fig. 4E View Figure ). Forewing pale brown, veins white, cell borders dark brown ( Fig. 4A–D View Figure ). Most of abdominal sternites dark brown. Femora and tibiae with dark brown marks ( Fig. 4D–E View Figure ).

Head wider than pronotum, anterior margin angulate in dorsal view ( Fig. 4A–C View Figure ). Crown shorter medially than distance between eyes ( Fig. 4A–C View Figure ). Anteclypeus tapering apically, not extended to ventral margin of face. Lorum semicircular, narrower than anteclypeus, well separated from lateral margin of face ( Fig. 4E View Figure ). Pronotum slightly longer than crown ( Fig. 4A–C View Figure ). Forewing exposing apex of pygofer or not, with numerous extra crossveins ( Fig. 4A–D View Figure ).

Male genitalia. Pygofer lobe apex rounded, with numerous macrosetae in distal half ( Fig. 5A–B View Figure ). Valve angulate caudally ( Fig. 5C View Figure ). Subgenital plate subtriangular, lateral margin incurved, with macrosetae arising laterally ( Fig. 5D View Figure ). Style with articulatory arm short; preapical lobe angulate; apophysis claw-like, short, apex not acute, slightly laterally curved ( Fig. 5E View Figure ). Connective slightly shorter than aedeagus. Aedeagus apex with relatively shallow, narrow V-shaped emargination, shaft curved 30° dorsad in lateral view, dorsal surface with small triangular subapical lobe on either side, dorsal membranous hood at base weakly developed, amorphous, with numerous conspicuous microtrichia, gonopore poorly delimited on dorsal surface ( Fig. 5F–G View Figure ).

Female. Sternite VII posterior margin with broad median weakly trilobed flap overlapping pair of lateral lobes ( Figs 4F View Figure , 6E View Figure ). Sternite VIII partially sclerotized, folded dorsad of sternite VII at rest, with pair of ovoid submedial sclerites not visible in uncleared specimens ( Fig. 6E View Figure ). First valvula with dorsal sculpturing imbricate, merging with short strigate ventral sculptured area distally ( Fig. 6A–B View Figure ). Second valvula moderately slender and nearly same width through most of length, dorsal margin with several small irregularly spaced teeth alternating between sides in distal half, toothed section horizontal, apex gradually and evenly tapered to acute point ( Fig. 6C–D View Figure ).

Material examined. Holotype: ♂, Argentina: Chaco P.N. Chaco, 70 m, 26° 48′ 50"S, 59°36′ 52"W, 10 Jan 2008, C.H. Dietrich, vacuum, AR10–5 ( MLPAbout MLP)GoogleMaps  . Paratypes: 1♀, Argentina: Chaco P.N. Chaco, 70 m, 26° 48′ 50"S, 59°36′ 52"W, 10 Jan 2008, C.H. Dietrich, vacuum, AR10–6 ( INHSAbout INHS)GoogleMaps  ; 1♀, Argentina: Chaco P.N. Chaco, 70 m, 26° 48′ 30"S, 59°36′ 23"W, 11–13 Jan 2008, Dietrich et al. Malaise trap, AR10–3 ( INHSAbout INHS)GoogleMaps  .

Etymology. The specific epithet is based on the similarity of this species to Amplicephalus (Amplicephalus) albivenosus (Osborn)  .

Remarks. This species resembles A. (N.) bolivicus Linnavuori  in coloration and shape but the latter differs in its larger size, truncate female sternite VII, and aedeagus with shaft more deeply split and nearly straight in lateral view. Its placement in A. ( Nanctasus  ) is supported by the presence of numerous extra crossveins on the forewing and a membranous hood covering the base of the aedeagus dorsally (see also Discussion below).


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Illinois Natural History Survey