Linnavuoria, Dai, Wu & Dietrich, Christopher H., 2015

Dai, Wu & Dietrich, Christopher H., 2015, A new genus of Iassinae (Hemiptera: Cicadellidae) from Peru and a new species of Daveyoungana Blocker & Webb, Zootaxa 3946 (2), pp. 285-295 : 286-291

publication ID 10.11646/zootaxa.3946.2.10

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gen. nov.

Linnavuoria View in CoL gen. nov.

Type species: Linnavuoria tingomariaensis sp. nov., here designated.

Description. Medium-sized, robust leafhoppers. Color dull stramineous with numerous red or brown markings or spots.

Head in dorsal view ( Fig. 1A View FIGURE 1. A – D ) wider than pronotum; crown short, flat, more than six times wider than long, anterior and posterior margins parallel; transition from crown to face narrow but without distinct transverse carina ( Fig. 1B View FIGURE 1. A – D ). Face ( Fig. 1 View FIGURE 1. A – D E) in anterior view coarsely punctate, without distinct transverse striations, slightly broader than tall, nearly flat in profile but with anteclypeus strongly convex ventrally ( Fig. 1B View FIGURE 1. A – D ); ocelli large, just mesad of antennal pits, approximately equidistant from eyes and midline and slightly closer to dorsal margin of face than to antennal pit, not visible from above ( Fig. 1 View FIGURE 1. A – D E); frontoclypeus in anterior view ( Fig. 1 View FIGURE 1. A – D E) approximately circular; frontal sutures complete, arcuate, extended from antennal ledges to midline; antennal ledge closer to anteroventral than to anterodorsal corner of eye, represented by prominent carina, slightly oblique, nearly horizontal, not concealing antennal base; antenna length one third width of head; gena broad, obtusely incised ventrad of eye, with obtuse ventrolateral projection almost completely concealing proepisternum; lorum narrow, well separated from lateral and ventral margins of gena, with basal fourth of mesal margin bordering frontoclypeus; anteclypeus strongly convex, broadened basally, gradually narrowed by 2/3 apically, apical margin carinate, slightly concave medially, extended slightly beyond ventral margin of gena, subapical margin depressed, forming distinct shelf in lateral view; rostrum short, narrow, not extended beyond front trochanters.

Pronotum ( Fig. 1A, B View FIGURE 1. A – D ) convex, strongly declivous anteriorly, with indistinct transverse depression preapically, anterior margin produced, posterior margin weakly concave, lateral margin shorter than eye, carinate; texture transversely rugulose and with numerous minute pits. Exposed part of mesonotum and scutellum as long as pronotum; scutellar suture strongly arcuate, apex acuminate. Forewing ( Fig. 1A, B View FIGURE 1. A – D ) membrane hyaline except costal field and clavus; venation moderately well delimited, conspicuously marked with numerous small black spots distributed over entire surface, with erect setae conspicuous, appendix absent; three closed anteapical cells present; apical cells 2–4 short, parallel-sided.

Front femur anterior surface ( Fig. 2 View FIGURE 2 A, B) with numerous scattered, poorly differentiated setae, AV with few long, fine setae basally; tibia ( Fig. 2 View FIGURE 2 A, C) with dorsal surface flattened but not expanded, dorsal rows undifferentiated, ventral rows with few stout preapical macrosetae. Hind femur ( Fig. 3 View FIGURE 3 A, B) with setal formula 2+1+1+1, with distal three stout and basal two smaller than others; tibial rows PD, AD, and AV with 17, 11, and 11 macrosetae, respectively ( Fig. 3 View FIGURE 3 A, E); tarsomere I long, pecten with 5 platellae medially flanked by longer tapered lateral setae, plantar (ventral) surface with two longitudinal rows of macrosetae and two longitudinal rows of fine setae, medial row cucullate ( Fig.3 View FIGURE 3 A, D); tarsomere II less than 1/3 length of tarsomere I, pecten with 2 platellae medially and 2–3 tapered lateral setae, plantar (ventral) surface with two macrosetae and several fine setae ( Fig. 3 View FIGURE 3 A, C).

Male abdomen with tergite I transverse, acrotergite small, elliptical; ventral apodemes absent. Sternite VIII longer than sternite VII, posterior margin roundly produced. Genital capsule with ventral part completely concealed by sternite VIII in repose, with only anal tube visible. Pygofer ( Fig.4 View FIGURE 4 A) as tall as long, with numerous scattered setae of various sizes distributed in distal third; elongate ventral process arising from base and extended distad along ventral margin. Anal tube moderately long, well sclerotized dorsally, without processes. Valve very short, straplike, narrowly fused to pygofer ( Fig. 4 View FIGURE 4 A). Subgenital plates ( Fig. 4 View FIGURE 4 B) elongate, medial margin slightly concave and then straight to apex; lateral margin rounded, broadened to 2/5 length, thence narrowed to bluntly rounded apex; with numerous scattered setae ventrally, more densely distributed toward apical half. Style ( Fig. 4 View FIGURE 4 D) apodeme massive, expanded apically; apophysis elongate, slender, apex footlike. Connective ( Fig. 4 View FIGURE 4 C) shieldlike, stem broad, anterior arms visible but fused by intervening sclerotization. Aedeagus ( Fig. 4 View FIGURE 4 E–G) with atrium and preatrium large, shaft tubular, tapered distally, gonopore subapical on posterior surface.

Distribution. Peru.

Etymology. The genus is named in honor of Prof. Rauno Linnavuori, in recognition of his excellent contributions to knowledge of the South American leafhopper fauna.

Notes. This genus is similar to Pachyopsis in overall structure, including wing venation and male genitalia, but differs as follows: head with crown flat and forming a distinct angle with face in profile (crown rounded to face in Pachyopsis ); face coarsely punctate, without distinct transverse striations or rugae (face transversely striate or rugose in Pachyopsis ); lateral frontal sutures extended from antennal ledge to midline and joining with distinct coronal suture (lateral frontal suture extended only short distance above antennal ledge in Pachyopsis ); forewing with numerous dark pigment spots corresponding to setal sockets (absent in Pachyopsis ); hind femur with macrosetal formula 2+1+1+1 (2+2+ 1 in Pachyopsis ).











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