Lutosa morsellii Cadena-Castañeda, 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 : 352-353

Lutosa morsellii Cadena-Castañeda n. sp.

( Fig. 1 )

http://lsid.speciesfile.org/urn:lsid: Orthoptera .speciesfile.org:TaxonName:518400

http://zoobank.org/ urn:lsid:zoobank.org:act:C2A7DD75-ABA9-4F1B-8920-263B0CFBF323

Type material. Holotype. Female. Brazil, Minas Gerais, Serra do Mantiqueira, Barrerira do Piquete. 1500 m. 11- I-1962 P. R. San Martín ( FCMU).

Etymology. Dedicated to João Paulo Morselli, Brazilian orthopterist, in recognition of his valuable contribution to the knowledge of the genus Lutosa (yet to be published), in addition to being a devoted teacher, who contributes to the education of Brazilian youth.

Description. In addition to the characters of the genus: Female. Medium size (20 mm), body dorsally black, laterally dark yellowish-brown, legs, and body ventrally ochre ( Fig. 1A ). Face with four brown stripes ( Fig. 1B ). Lateral lobes of pronotum with ventral half ochre ( Fig. 1C ). Head. Fastigium of vertex rounded and not projected. Fastigium of frons rounded, touching fastigium of vertex. Clypeus as wide as high, subtriangular, lateral margin gradually narrowing towards the apical margin, slightly curved. Eyes completely pigmented and ocelli ovoid ( Fig. 1B ). Thorax. Pronotum not very high and without hairs. Anterior and posterior edges of pronotal disc straight ( Fig. 1C ). Legs. Fore tibia with ovoid and mid-sized tympana on both sides, dorsal margin with a dorsal spur on each side of the middle of the tibia, the longest being the inner spur; apex with two dorsal spurs of similar size, one on each side; ventrally with four 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 the outer and three on the inner margin. Hind femur with ten chevron stripes on the outer face; ventral margin with five undulations. Hind tibia straight and with eight spines on each dorsal margin, apical dorsal spur two times longer than the preapical spur. Abdomen without denticulations in the first tergites. Ninth tergite slightly covering the tenth tergite. Tenth tergite narrow, with the dorsal region covered by the ninth tergite, lateral region visible in lateral view, with the posterior border with an obtuse angle formed by two straight margins. Epiproct like a semicircle; cerci slender and medium-sized; paraprocts dorsoventrally compressed and surrounding the epiproct ( Fig. 1D ). Ovipositor as long as three-quarters of the length of the hind femur, curving progressively from the mesal region towards the apex ( Fig. 1E ). Subgenital plate rectangular, wider than long, posterior edge with a notch, which in turn has an additional notch in the central part ( Fig. 1F ).

Male. Unknown.

Measurements (mm): LB: 20. Pr: 8. HF: 20. HT: 17. SP: 2.5 / 2 – 3. Ov: 14.

Comparison. Of all the species described so far with known females, no female has a subgenital plate with a wide notch on the posterior margin. The other females have a triangular subgenital plate (the most common form) or rectangular like L. goeldiana . Of the currently known species, the most similar is L. marginalis , differing in the shape of the subgenital plate, epiproct, and ovipositor. L. marginalis has a triangular subgenital plate, the ovipositor curves upward from the base, and the epiproct is hexagonal. In contrast, L morselli n. sp. has a conspicuous notch on the subgenital plate, the ovipositor does not curve from the base, and the epiproct is semicircular in shape.

Figures

FIGURE 1. Lutosa morselli n. sp. female. A. Habitus in lateral view. B. Face. C. Head and pronotum in lateral view. D. Terminalia in axial and E. lateral views respectively. F. Subgenital plate.