Viadana (Viadana) parobliqua, Gorochov, 2018

Gorochov, A. V., 2018, Systematics of the American Katydids (Orthoptera: Tettigoniidae). Communication 8, Proceedings of the Zoological Institute of the Russian Academy of Sciences 322 (4), pp. 398-456 : 415-417

publication ID

https://doi.org/10.31610/trudyzin/2018.322.4.398

persistent identifier

https://treatment.plazi.org/id/AF3387E1-D50D-FFC1-FCCB-FDCEFEE7FA00

treatment provided by

Felipe

scientific name

Viadana (Viadana) parobliqua
status

sp. nov.

Viadana (Viadana) parobliqua View in CoL sp. nov.

( Figs 105–107 View Figs 95–107 , 125)

Etymology. This species is named after V. obliqua , a Peruvian congener similar to the new species in the structure of female genital plate.

Type material. Holotype – female, ECUADOR: ~ 30 km EES of Tena City, “Chuva Urcu” on Rio Cusano , lowlying forest, December 2005, A. Ovtshinnikov, D. Smolnikov.

Description. Female (holotype). General appearance more or less similar to that of V. (V.) obliqua . Body colouration yellowish to greenish (uniformly greenish in living condition?); upper rostral tubercle small, with very narrow (almost vertically lamellar) apical part, with a pair of small inflations (partly fused with each other) at base of this tubercle, and with small but distinct dorsal notch between these inflations and apical part of this tubercle in profile; pronotum with disc moderately narrow, having anterior edge slightly concave, posterior edge clearly convex, and lateral edges subparallel and almost keel-like, as well as with lateral lobes as in Fig. 107 View Figs 95–107 ; tegmina with most part of costal edge almost straight, with anal edge distinctly (but not strongly) arcuate, with five more or less arcuate branches on R, with lateral (anterior) branch of MP+CuA1 rather short and strongly curved near its base ( Fig. 107 View Figs 95–107 ), and without well developed stridulatory apparatus in dorsal field; hind wings with apical portion of costal part somewhat protruding beyond tegminal apices ( Fig. 107 View Figs 95–107 ) and more or less similar to apical tegminal portion in venation; legs very similar to those of V. obliqua ; last tergite rather short (somewhat shorter than other abdominal tergites) and simple; epiproct elongately triangular, with roundly angular apex and median longitudinal groove (fold); cerci unspecialized, typical of Viadana females; genital plate very large, similar to that of V. obliqua ( Fig. 106 View Figs 95–107 ) and having each lateral part with angularly rounded middle projec-

Figs 108–130. Subtribes Anaulacomerina (108–113), Pycnopalpina (114, 115), Viadanina (116, 117, 124, 125) and Phaneropterina (118, 119), and tribes Dysoniini (120), Microcentrini (121) and Scudderiini (122, 123, 126–130), schematically: 108 – Anaulacomera uncinata Heb. ; 109 – Separatula falcata (Giglio-Tos) ; 110 – Abrodiaeta propinqua sp. nov.; 111 – Rostellula santacruzi sp. nov.; 112 – R. minutissima sp. nov.; 113 – Grammadera tricaudata Gor. ; 114 – Pycnopalpa bicordata (Saint-Fargeau et Serv.) ; 115 – Theia carinata Gor. ; 116 – Viadana biloba Gor. ; 117 – Tomeophera semilata Gor. ; 118 – Nephoptera tibialis Uv. ; 119 – Phaneroptera falcata (Poda) ; 120 – Machimoides rehni Gor. ; 121 – Microcentrum retinerve (Burm.) ; 122 – Scudderia mexicana (Sauss.) ; 123 – Euceraia sanguinea Piza ; 124 – V. obliqua Gor. ; 125 – V. parobliqua sp. nov.; 126 – Theudoria melanocnemis (Stål) ; 127 – Th. diversa (Br.-W.); 128 – Th. pyrrhocnemis surinam subsp. nov.; 129 – Ligocatinus paraguay sp. nov.; 130 – L. spinatus (Br.-W.). Stridulatory apparatus of left (108, 109, 111, 112, 114, 115, 116, 118, 121), right (117, 119, 122) or both (110, 113, 120, 123) tegmina; female genital plate from side (124, 125); distal part of cercus (126, 127) and of its lateral branch (128) from below (126), from below/behind (127) and from above/behind (128); male abdominal apex from side/above/ behind (129, 130). Abbreviations: m – mirror; s – stridulatory vein. [130 – after photograph in OSF, modified].

tion directed upwards (in V. obliqua , this projection directed upwards/forwards and with distinct but small notch located before this projection in profile; see Figs 124 and 125); ovipositor short (its shape as in Fig. 105 View Figs 95–107 ).

Male unknown.

Length (mm). Body 16.0; body with wings 30.0; pronotum 3.9; tegmina 24.0; hind femora 13.0; ovipositor 4.8.

Comparson. The new species is most similar to V. obliqua in the shape and size of female genital plate, but it differs from the latter species in the upper rostral tubercle with a distinct notch in profile as well as in the above-mentioned characters of female genital plate. From V. (V.) lobata having the female genital plate also very large, the new species is distinguished by this plate wider and with distinct dorsolateral projections; from V. (V.) rostrata sp. nov., by the apical part of upper rostral tubercle distinctly narrower (almost lamellar); from V. (V.) curvicercata ( Brunner-Wattenwyl, 1891) , by the lateral (anteri- or) branch of tegminal MP+CuA1 distinctly longer; from V. (V.) transversa , by the branches of tegminal R more arcuate and more oblique; from V. (V.) delicatula Piza, 1976 , V. (V.) festae (Giglio-Tos, 1898) and V. (V.) diegomendesi Cadena-Castañeda, 2015 , by the space between tegminal Sc and anal tegminal edge clearly wider; and from all the other species of this subgenus, by the female genital plate larger, and ovipositor shorter. Differences of the new species from V. (V.) hamata Gorochov, 2015 , V. (V.) ultrahamata Gorochov, 2015 and V. (V.) satipo Gorochov, 2015 with only males known are less understandable, but the anal edge of tegmen in V. hamata is distinctly less convex, distal branches on R in the tegmina of V. ultrahamata are more sloping, and dorsal edge of head rostrum in V. satipo is with less distinct notch in profile.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Orthoptera

Family

Tettigoniidae

Genus

Viadana

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