Camposgryllacris Cadena-Castañeda, 2024

Cadena-Castañeda, Oscar J. & Quintana-Arias, Ronald Fernando, 2024, Studies of Raspy Crickets: The Status of the Wingless American gryllacridines (Orthoptera: Gryllacrididae), Zootaxa 5419 (4), pp. 563-583 : 578

Camposgryllacris Cadena-Castañeda n. gen.

Type species. Camposgryllacris australis ( Rehn, 1907) n. comb., here designated.

Etymology. This new genus is dedicated to our dear friend and orthopterist Lucas Denadai de Campos (Universidade de São Paulo). The gender of the name is being established as neuter.

Description. Small to medium size (body length 13.5–16 mm). Coloration. Body ocher, without distinctive spots or stripes ( Figs. 9A–C ). Head. Space between antennal sockets 2.5 times wider than the antennal scape; ocelli rounded, small, and diffuse; maxillary palps elongated, third and fourth segments similar in size, fifth segment a little longer than the previous ones, and dilated at the apex; labial palpi slim, apex of the last segment noticeably dilated and with rounded apex ( Fig. 9A ). Thorax. Pronotum narrow and smooth, with quadrangular disc, anterior and posterior margins rounded ( Fig. 9B ); lateral lobes rectangular, wider than high, with shallow v-sulcation; auditory spiracle below the lower margin of the lateral lobe of the pronotum, armed with a conical fold, attached on the mesothorax ( Figs. 9A ). Sternum lobes are rounded and narrow, without prolongations; mesosternum quadrangular with the anterior margin 1.5 wider than the posterior one; metasternum triangular and narrow. Legs. Fore coxa armed with a spine-like tubercle dorsally. Fore and mid femora unarmed; fore and middle tibiae with three medium-sized spurs on each ventral margin and one spur on each side of the ventral apex; hind femur very robust, ventrally armed with 3–4 small spines; hind tibia armed with small spines dorsally, apex with three spurs on each side, being the upper and mid one the longer and similar in length ( Fig. 9A ). Wings. Alar rudiments small on meso- and metanotum present. Abdomen. Stridulatory apparatus present on the sides of first and second tergites. Last tergite moderately inflated ( Fig. 9A ), posterior margin rounded, and a median longitudinal carina present on the distal half ( Figs. 9A, B ). Cerci almost cylindrical, and short ( Figs. 9A, B ). Paraprocts and epiproct unmodified. Subgenital plate short, posterior margin produced and subtriangular shaped.

Female. Tenth tergite without modification ( Figs. 10A, B ). Cerci cylindrical and thin; ovipositor almost as long as the hind femur, curving upward, margins smooth, apex acute ( Figs. 10A ). Subgenital plate broad trigonal, and apex narrowly and shallowly emarginate ( Figs. 10C ).

Distribution. Paraguay, Argentina (Misiones and Entre Ríos), and Southern Brazil (Rio Grande do Sul and Paraná) ( Map 2 ).

Comparison. Camposgryllacris n. gen., in addition to the comparison with Fiancogryllacris n. gen., differs for space between antennal sockets is wider to Camposgryllacris n. gen. than Fiancogryllacris n. gen. Both genera also differ in the shape and length of the ovipositor, for Camposgryllacris n. gen. is shorter and more curved than the females of Fiancogryllacris n. gen. The two genera are similar in their uniform coloration and the presence of wing rudiments.

The new genus is differentiated from Neortus stat. resurr., because it lacks the denticulations of the posterior margin of the last tergite. The two genera are similar in space between antennal sockets and have three spurs on each ventral margin of the fore and middle tibia.

Camposgryllacris n. gen., do not have brown or black bands on the thorax and abdomen, as occurs in Camptonotus species. The new genus differs from Neoeremus by the number of spurs on the fore and middle tibiae, which are lesser in the new genus. It also differs in that the projection of the posterior margin of the subgenital plate of males is rounded in Neoeremus , and angulated in Camposgryllacris n. gen.

Comments. The type species of this new genus was originally included in Camptonotus , so it is proposed here as a new combination, becoming effective: C. australis ( Rehn, 1907) n. comb. (= Camptonotus australis Rehn, 1907 ). There is no data on the species since its original description; only the specimens of the type series are known from Sapucay, Paraguay. Additional species records have been observed from iNaturalist photographs ( Table 2 , Fig. 11 ), expanding the known distribution to Misiones, Argentina, and Southern Brazil ( Map 2 ).

Figures

MAP 2. Camposgryllacris australis n. comb. and Fiancogryllacris rivimeridionalis n. comb., distribution.

FIGURE 9. Camposgryllacris australis (Rehn, 1907) n. comb., male holotype. A. Habitus in lateral, B. dorsal and C. ventral views. D. Labels. (© L. Campos).

FIGURE 10. Camposgryllacris australis (Rehn, 1907) n. comb., female paratype. A. Habitus in lateral, B. dorsal and C. ventral views. (© L. Campos).

FIGURE 11. Camposgryllacris australis (Rehn, 1907) n. comb. Male alive from Concepción del Uruguay, Entre Ríos, Argentina. (© L. Rubio).