Notocerus devriesei Cadena-Castañeda & Quintana-Arias & Infante & Silva & Tavares 2025, comb. nov.
Year: 2025
Type: other
Abstract: Notocerus devriesei (Skejo, Medak, Pavlović, Kitonić, Miko & Franjević, 2020), comb. nov. (Figs. 133–135) Holocerus devriesei Skejo et al., 2020: 8. Holotype. Male. MADAGASCAR: Toamasina: Analamazaotra (Map 10). Depository: MNCN, catalogue number MNCN_Ent 26936. Remarks. Here a new combination is proposed for the reasons given above. Genus Guntheritettix Cadena-Castañeda & Tavares, gen. nov. Type species: Notocerus formidabilis Günther, 1974, here designated. Description. Body robust and with surface granulated (more conspicuous in the anterior half of the pronotal disc) (Figs. 136A, B, 137A, B). Head little exserted. In frontal view, vertex as wide as 2.5 times the width of an eye, anteriorly rounded, slightly lower than the eyes; medial and lateral carinae not elevated; frontal costa bifurcation a little above the middle of the eyes; scutellum narrow, fascial carinae slightly elevated; antennal groves located slightly lower than the lower margin of the eyes, in the middle length of each branch of the fascial carinae; antennae incomplete in all known specimens; lateral ocelli placed between the middle of the eyes, near the middle length of each branch of the fascial carinae; medial ocellus located close to the lower margin of the scutellum; palpi with last three segments flattened, first two segments short and nearly cylindrical (Figs. 136C, 137C). In lateral view, face almost straight; carinae of the vertex not produced between the eyes; fastigio-fascial angle truncated; fascial carinae slightly emerging between the antennae, not surpassing the pedicelus length and rounded, above and below slightly sinuated; eyes mid-sized, rounded, with rounded dorsal surface, ventral margin somewhat straight and more elevated than vertex (Figs. 136A). Thorax. Pronotum reaching or exceeding the apex of the abdomen; dorsally with a large and almost straight anterior edge and slightly truncated apex; humeral spots absent; pronotal disc with a conspicuous hump in the middle section of the pronotum, covered by conspicuous and subconical granules (some specimens may have moderately developed granules, others very conspicuous and almost pointed); median carinae poorly visible; metalateral projections (humeral angles or shoulders) surpassing the apices of the lateral lobes (Fig. 137A). Lateral lobes of pronotum quadrangular, lower edge flattened and projected to the sides, triangularly rounded produced, with acute apex; posterior margin of lateral lobes with a mid-undulation (Fig. 137B); infra-scapular area short and narrow ending at the level of the first to second abdominal segments; lateral area extending to the apex of the pronotum and wider than the infrascapular area in lateral view (Fig. 137A). Wings. Tegmina ovoid and hind wings reaching the apex of the pronotum (Fig. 136A). Legs elongated, with the dorsal and ventral margin slightly wavy, almost straight (Fig. 137A). Hind femur with antegenicular and genicular teeth developed. Hind tibia scarcely ampliated near the apex; first segment of the hind tarsi longer than the third one (Fig. 137B). Abdomen. Last segments, between the eighth and ninth, moderately constricted; cerci conical; penultimate sternite mid-sized, almost as long as the subgenital plate, slightly rounded in lateral view; subgenital plate triangular-shaped in ventral view, slightly upcurved, almost straight, and apex pointed-angulated. Female. Similar in shape and size to the male, a little more robust (Figs. 136, 138), differing in ambisexual characters:thin ovipositor valves, with the ventral margin almost straight, and the dorsal margin slightly curved, armed with small serrulations (Figs. 136A, 138A). Subgenital plate rectangular, with the posterior margin rounded. Species included. Guntheritettix formidabilis (Günther, 1974), comb. nov. only. Distribution. Madagascar (Map 9). Comparison. The morphology of the pronotum mainly differentiates the genera of this tribe. Notocerus s. str. has similarities in the extension of the lateral carina, forming conspicuous triangular spines similar to Holocerus. Although Eurybiades shares similarity in this character, it has an additional spine near the anterior margin of the pronotum, on the median carina, absent in Notocerus and Holocerus but present in Andriana (with moderate development) and as an undulation in Bara, Hybotettix, and Rehnitettix. Guntheritettix gen. nov. is distinguished from the other genera of the tribe by its robust appearance and the impressive hump in the mesal section of the pronotal disc, armed with conspicuous tubercles and metalateral projections. This is not observed in the other genera. Only Silanotettix have a crest on the same region, laterally flattened, differing from the striking hump of the new genus. The new genus is differentiated from Notocerus s. str. because they do not have the hump or conspicuous tubercles. In addition, the last segments of the abdomen of the females of N. cornutus are conspicuously constricted, and the valves of the ovipositor, although thin, are thicker than Guntheritettix gen. nov. The scapular area is narrower in Notocerus s. str. than in the new genus. Remarks. This new genus is proposed due to the differences observed with Notocerus cornutus (type species of Notocerus) and Guntheritettix formidabilis (originally included in Notocerus). MAP 9. Distribution of Andriana, Guntheritettix gen. nov. and Eurybiades species. MAP 10. Distribution of Holocerus and Notocerus species. Etymology. This genus is dedicated to the memory of the illustrious orthopterist Klaus Günther, who extensively studied tetrigids from different world regions. It adds the ending - tettix, common in many genera of pygmy grasshoppers. The gender of the name is being established as neuter.
Authors: Cadena-Castañeda, Oscar J., Quintana-Arias, Ronald Fernando, Infante, Ivette Coque, Silva, Daniela Santos Martins, Tavares, Gustavo Costa
Language: English
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W6930662606
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