Lutosa quaresmai Cadena-Castañeda & Tavares, 2022

Cadena-Castañeda, Oscar J., García, Alexander García, Nos, Maria Del Pilar Castella-, Sarmiento, Juan Pablo Prias & Tavares, Gustavo Costa, 2022, Studies on chevron crickets: Contribution to the knowledge of Lutosinae / ini taxa (Orthoptera: Anostostomatidae), Zootaxa 5178 (4), pp. 347-379 : 354-356

publication ID

publication LSID


persistent identifier

treatment provided by


scientific name

Lutosa quaresmai Cadena-Castañeda & Tavares

n. sp.

Lutosa quaresmai Cadena-Castañeda & Tavares n. sp.

( Figs. 2–4 View FIGURE 2 View FIGURE 3 View FIGURE 4 ) Orthoptera

Type material. Holotype. Male. Brazil, Pará, Melgaço, FLONA Caxiuanã —ECFPn, 47A—ESECAFLOR. 1°43’35”S, 51°26’36”W. Janeiro, 2012. Cunha, D.A. ( MPEG) GoogleMaps . Paratype. Female. Same data as holotype, but collected in April, 2012.

Etymology. Dedicated to the memory of Luiz Augusto Quaresma, member of the curatorial staff of the entomological collection of Museu Paraense Emílio Goeldi, who pased away in January, 2021. Luiz Augusto Quaresma worked in the entolomological collection for many years and always helped all the reserchers of the institution, especially the students who were taking their first steps in science.

Description. Male. Medium-sized (17.7 mm), Head thorax and abdomen dorsally dark brown; legs brown (femora and tibiae). Face, body ventrally, tarsi, and ventral half of pro-, meso-, and metanotum ochre. Face without stripes or spots, mandibles dark ochre at the first half and brown on distal half ( Figs. 2A, B View FIGURE 2 ). Head. Fastigium of vertex rounded, with the lateral margins straight in frontal view; clypeus wider than high and subtriangular-shaped. Eyes not completely pigmented, with the dorsal edge white; lateral ocelli rounded and central ocellus ovoid. Apex of the palps without cuticle ( Fig. 2C View FIGURE 2 ). Thorax. Pronotum not very high and with short triangular hairs on anterior edge. Anterior and posterior edges of pronotal disc rounded. Ventral posterior corner of the lateral lobe of the pronotum slightly curved inward. Ventral posterior corner of mesonotum angulated, and covering the base of the metanotum in lateral view, as the same way the metanotum, which covers the anterior margin of the first abdominal tergite ( Fig. 1A View FIGURE 1 ). Legs. Fore tibia with ovoid and large tympana on both sides, dorsal margin with two dorsal spurs on outer margin and a long dorsal spur on inner margin close to tympana; apex with two dorsal spurs similar in size, one on each side; ventrally with five similar-sized spurs on each margin. Mid-tibia dorsally armed with four spurs on the inner margin and three on the outer one; ventrally with four spurs on both margins. Hind femur with 12–14 chevron stripes on outer face; ventral margin without undulations. Hind tibia straight and with 11 dorsal spines on outer margin and 12 on inner margin, apical dorsal spur 2.5 longer than the preapical spur. Abdomen. Tenth tergite truncated in lateral view ( Fig. 2G View FIGURE 2 ), divided into two ovoid lobes and armed with two conspicuous conical hooks at the middle of the segment in axial view ( Fig. 2E View FIGURE 2 ). Epiproct triangular-shaped, with the apex rounded. Cerci thin and three times longer than the subgenital plate ( Figs. 2D, H View FIGURE 2 ). Paraprocts ovoid with a small and sclerotized hook ( Fig. 2E, H View FIGURE 2 ), almost covered by the epiproct (only the hooks are visible in each side of the epiproct). Subgenital plate quadrangular, posterior edge without sclerotized plates or spines, slightly rounded in ventral view, styli conical and mid-sized ( Fig. 2F View FIGURE 2 ). Phallic complex. In frontal view, lobe dl very large, covered by numerous rounded sclerotized microstructures. Processes ti as sclerotized folds on the ventralmost central portion of the dl, ventrally touching the fold vdl, with some sclerotized microstructures, which connect with several round microstructures of the dl ( Fig. 3A View FIGURE 3 ). The folds of the processes ti are produced anteriorly and can be easily seen in lateral view ( Fig. 3D View FIGURE 3 ), dorsal view ( Fig. 3B View FIGURE 3 ), and even in ventral view ( Fig. 3C View FIGURE 3 ). Sclerites TS flattened and very large; the dorsal border is obliquely truncated and produced to the fold ldl; the ventral portion is curved and ends in an inwaqrd point. Lobe vl small but slightly sclerotized. Fold df thin and extends till the center of the lobe dl. In lateral view, cavity ec largely opened posteriorly and dorsally. Lobe vl conspicuously produced anteriorly and notably inflated, forming a large anterophallic chember ( Fig. 3D View FIGURE 3 ).

Female. Similar to male, but bigger (23.4 mm). The ochre regions of the body lighter than in males ( Figs. 4A, B, C View FIGURE 4 ), as well as the distal half of the hind tibia ( Fig. 4B View FIGURE 4 ). Tenth tergite conspicuously divided into two sub-triangular lateral segments ( Fig. 4E View FIGURE 4 ). Epiproct semicircle-shaped with a rounded posterior edge; paraprocts flexible and without modification ( Fig. 4E View FIGURE 4 ). Cerci slender and medium-sized. Ovipositor as long as three-fifths the length of the hind femur, curving progressively from the base to the apex ( Fig. 4G View FIGURE 4 ). Subgenital plate triangular, longer than wide, and with a moderately pointed apex ( Fig. 4D View FIGURE 4 ).

Measurements (mm) male/female: LB: 17.7/23.4. Pr: 7.9 / 9.7. HF: 19.9/24.4. HT: 19.7/24.4. SP: 2.3/1.5. Ov: 15.

Comparison. Among the currently described species, this new species resembles the male of Lutosa cubaensis . L. quaresmai n. sp. differs from L. cubaensis , by the darker coloration of the body and the constant brown coloration of the body’s dorsal surface. In contrast, L. cubensis has lighter shades, and the abdomen in dorsal view has black stripes along the posterior edges of the tergites. The two lobes of the tenth tergite of L. cubaensis are narrower and the hooks thicker than in the new species. Both species do not have sclerotized plates on the posterior border of the subgenital plate.

The female of L. quaresmai n. sp. is more similar to L. marginalis than to the other currently known females. The new species differs from L. marginalis by the larger size and the shape of the epiproct, wich in L. quaresmai n. sp. is a semicircle, and in L. marginalis is a hexagon. The subgenital plate in both females is triangular, but they differ, for L. marginalis , the apex is truncated, and for the new species, it is not.

Comments. This is the first species of Lutosa , whose generic affiliation is confirmed, and which is outside the Atlantic Forest (discarding females and immatures recorded by Karny (1935) from French Guiana and species with doubtful locality). With this record, the confirmed distribution of the genus here expands considerably, towards the Amazon Forest, suggesting that this genus could be even more specious than that discovered by Morselli (2010).


Museu Paraense Emilio Goeldi