Guntheritettigini Cadena-Castañeda, 2025
publication ID |
https://doi.org/10.11646/zootaxa.5597.1.1 |
publication LSID |
lsid:zoobank.org:pub:E8B87293-0CCD-469D-9F2F-17F1AB4919BF |
persistent identifier |
https://treatment.plazi.org/id/542B87FD-FF18-04A6-9FDE-C477FC1CFAD3 |
treatment provided by |
Plazi (2025-03-04 12:56:25, last updated 2025-03-04 13:25:28) |
scientific name |
Guntheritettigini Cadena-Castañeda |
status |
trib. nov. |
Tribe Guntheritettigini Cadena-Castañeda , trib. nov.
Type genus: Guntheritettix Cadena-Castañeda & Tavares gen. nov.
Description. Body slender or moderately robust (few taxa robust); small to medium size (11–23 mm.). Head little exserted. In frontal view, face subcircular, almost as wide as high; upper margin of the vertex at the same level as the lateral carinae; fastigium rounded; medial and lateral carinae not elevated; vertex wide, two or three times as wide as an eye. Scutellum narrow and short, reaching only a quarter (or less) of the height of the face; frontal costa short and forking generally slightly above the middle of the eyes. Eyes rounded, slightly straight at lower margin, medium in size, protruding to the sides and slightly above the vertex ( Rehnitettix with almost pedunculated eyes ( Fig. 130C View FIGURE 130 )), occupying one-third of the cephalic capsule. Lateral ocelli between the middle part or close to the upper margin of the eyes, near the base from where each branch of fascial carinae diverges; medial ocellus close to the lower margin of the scutellum. Antennal groves at the level of the lower margin of the eyes, antennae usually mid-sized, as long as the mid femur or longer, with 12 or 13 segments ( Andriana has some flattened segments, especially the distal ones). Last three segments of palpi flattened, and the first two short and nearly cylindrical ( Figs. 126C View FIGURE 126 , 129C View FIGURE 129 , 131B View FIGURE 131 ). In lateral view, frons almost straight; medial carinae not protruding beyond the eyes, slightly tapering ( Figs. 126A View FIGURE 126 , 129A View FIGURE 129 ); anterior margin of the vertex truncated, dorsum without fossulae ( Figs. 126B View FIGURE 126 , 129B View FIGURE 129 ).
Thorax. Pronotum slender or robust, moderately granulated ( Guntheritettix gen. nov. with conspicuous granules on the pronotal disc ( Figs. 136A View FIGURE 136 , 137A View FIGURE 137 , 138C View FIGURE 138 )), surpassing the tip of the abdomen and apex of the hind femur. Pronotal disc with a straight anterior margin and a pointed or truncated posterior margin, dorsally variable, with several modifications: almost flat, raised promedial projection like a spine on the median carina in the prozone ( Figs. 126A View FIGURE 126 , 127B View FIGURE 127 ), internal lateral and median carinae projected or wavy ( Figs. 128A View FIGURE 128 , 129A View FIGURE 129 ), or bearing conspicuous spine-like projections of the lateral carinae ( Figs. 131A View FIGURE 131 , 132A View FIGURE 132 ). Lateral lobes of pronotum quadrangular in lateral view, lower edge well projected to the sides, with acute apex ( Figs. 128B View FIGURE 128 , 129B View FIGURE 129 , 132B View FIGURE 132 ); tegminal sinus absent; infrascapular area thin and of variable length, projecting between the second or third abdominal segment, or reaching close to the apex of abdomen; lateral area slightly wider than the infrascapular area, arising above the dorsal undulation of the infrascapular area, projecting to the apex of the pronotum in lateral view; if with modifications, such as undulations or spines, lateral area wide in those sections, subtly simulating the upward curvature of those structures. Wings. All known species winged; tegmina ovoid and short, at rest, almost or completely covered by the dorsal half of the pronotum ( Figs. 128A View FIGURE 128 , 129A View FIGURE 129 ). Hind wings reaching the apex of the pronotum or slightly exceeding it. Legs. Fore and mid femur elongated and thin, with dorsal and ventral margins almost straight and carinated. Hind femur with antegenicular and genicular teeth developed, with external surface without tubercles or lappets. Hind tibia scarcely ampliated near the apex; the first segment of the hind tarsi longer than the third one. Pulvilli of posterior tarsi rounded. Abdomen. Male: last segments, between eighth and ninth, moderately constricted. Subgenital plate cupuliform, as long as or slightly longer than the last abdominal sternite, with apex rounded, angled, or pointed. Cerci conical. Female: epiproct ovoid or subtriangular. Subgenital plate mainly triangular, with the posterior edge rounded or angled. Ovipositor valves narrow, with serrulations of medium length; inferior valves not conspicuously covered by the lateral edges of the subgenital plate.
Genera included. Guntheritettix Cadena-Castañeda & Tavares , gen. nov., Andriana Rehn, 1929 , Bara Rehn, 1929 , Eurybiades Rehn, 1929 , Holocerus Bolívar, 1887, Hybotettix Hancock, 1900 , Notocerus Hancock, 1900 , Rehnitettix Günther, 1939 , and Silanotettix Günther, 1959 .
Distribution. Madagascar (Maps 9–12).
Remarks. This tribe includes nine genera with 19 species, which in the past was considered the group of “ Metrodorinae of Madagascar ”. Several species have colorful bodies that, in some cases could be aposematic and that, unfortunately, do not preserve in museum specimens. The taxa with the most conspicuous spines are Eurybiades , Holocerus , and Notocerus , known as pygmy devil’s grasshoppers ( Skejo et al. 2020). Others have humps like Guntheritettix gen. nov. or undulations like the other genera.
The genera included here are well described in Rehn (1929) and Günther (1939, 1959), so it is not necessary to redescribe any of them. A key for identifying the genera is provided below.
Bolivar, I. (1887) Essai sur les Acridiens de la tribu des Tettigidae. Annales de la Societe Entomologique de Belgique, 31, 175-313.
Gunther, K. (1939) Revision der Acrydiinae (Orthoptera), III. Sectio Amorphopi (Metrodorae Bol. 1887, aut.). Abhandlungen und Berichte aus den Staatlichen Museen fur Tierkunde und Volkerkunde in Dresden, Series A: Zoology, N. F., 20 (NF Bd. 1), 16-335.
Gunther, K. (1959) Die Tetrigidae (Orthopt., Caelifera) von Madagascar mit einer Erorterung ihrer zoogeographischen Beziehungen und ihrer phylogenetischen Verwandtschaften. Abhandlungen und Berichte aus den Staatlichen Museen fur Tierkunde und Volkerkunde in Dresden, Series A: Zoology, N. F., 24, 3-56.
Rehn, J. A. G. (1929) New and little known Madagascar grouselocusts (Orthoptera: Acrididae, Acrydiinae). Proceedings of the Academy of Natural Sciences, Philadelphia, 81, 477-519.
Skejo, J., Medak, K., Pavlovic, M., Kitonic, D., Miko, R. J. C. & Franjevic, D. (2020) The story of the Malagasy devils (Orthoptera, Tetrigidae): Holocerus lucifer in the north and H. devriesei sp. nov. in the south? Zookeys, 957, 1-15. https://doi.org/10.3897/zookeys.957.52565
FIGURE 126. Andriana hancocki (Bruner, 1910). Male holotype. A. Habitus in lateral view. B. Habitus in dorsal view. C. Frons. D. Labels. Photos: S. Ingrisch.
FIGURE 127. Eurybiades cerastes Rehn, 1929. Male holotype. A–B. Habitus in lateral view. C. Frons. D. Habitus in dorsal view. Photos: J. Tumbrinck.
FIGURE 128. Hybotettix humeralis Hancock, 1900. Female habitus. A. Lateral view and, B. Dorsal view. Photos: S. Ingrisch.
FIGURE 129. Bara turgida Rehn, 1929. Female paratype. A. Habitus in lateral view. B. Habitus in dorsal view. C. Frons. Photos: S. Ingrisch.
FIGURE 130. Rehnitettix olsufieffi Günther, 1939. Female holotype. A. Habitus in lateral view. B. Habitus in dorsal view. C. Frons. D. Labels. Photos: S. Ingrisch.
FIGURE 131. Holocerus lucifer (Serville, 1838). Female holotype. A. Habitus in lateral view. B. Frons. C. Habitus in dorsal view. D. Labels. Photos: Christophe Hervé (MNHN).
FIGURE 132. Notocerus cornutus Hancock, 1900. Female holotype. A. Habitus in lateral view. B. Habitus in dorsal view. C. Frons. Photos: J. Tumbrinck.
FIGURE 136. Guntheritettix formidbilis (Günther, 1974) comb. nov. Female holotype. A. Habitus in lateral view. B. Habitus in dorsal view. C. Frons. D. Labels. Photos: C. Hervé (MNHN).
FIGURE 137. Guntheritettix formidbilis (Günther, 1974) comb. nov. Male not a type. A. Habitus in lateral view. B. Habitus in dorsal view. C. Frons. D. Labels. Photos: S. Hugel.
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