Tintiyakus trewicki Cadena-Castañeda, 2020

Mendes, Diego Matheus De Mello, Cadena-Castañeda, Oscar J., Heleodoro, Raphael Aquino, Ramos-Pastrana, Yardany & Rafael, José Albertino, 2020, A new genus of chevron cricket (Orthoptera: Anostostomatidae: Lutosinae) from the Colombian and Venezuelan Amazon Rainforest, Zootaxa 4729 (4), pp. 538-550 : 546-548

Tintiyakus trewicki Cadena-Castañeda sp. nov.

http://lsid.speciesfile.org/urn:lsid: Orthoptera .speciesfile.org:TaxonName:506706

Figures 5–6 and 8

“ F2333 new genus Colombia ” Vandergast et al., 2017: 12.

Diagnosis. Male cercus robust, cylindrical at anterior half, conical at posterior half; anterior and posterior halves with same length ( Figs. 5 D–F). Male subgenital plate almost 2x longer than wide, rugose, posterior margin Ushaped emarginated, with long setae ventrally ( Fig. 5 D–F). Stylus conspicuously inward curved, robust, conspicuously shorter than subgenital plate ( Fig. 5 D–F). Male genitalia titillator’s process with posterior margin light brown, both lobes conspicuously separated and rounded ( Fig. 6 A–D). Ejaculatory vesicles slightly smaller than titillator’s process ( Fig. 6 C–D).

Etymology. The name of the species is dedicated to Dr. Steven Trewick, Massey University, New Zealand, as a recognition for his contributions on wetas and cave crickets and as an acknowledgement by his careful help in previous investigations.

Type material. Holotype ♂: Colombia, Guaviare, San José del Guaviare, La Lindosa ( CAUD).

Description.

Male. Head. General coloration deep black, shiny ( Fig. 5 A–C). Fastigium of vertex not projected, as wide as scapus. Fastigium of frons rounded, touching fastigium of vertex ( Fig. 5 A–C). Clypeus wider than high, subtriangular, lateral margin gradually narrowing towards apical margin, slightly curved; apical margin arched ( Fig. 5C ). Antenna with first basal third dark brown, remaining light brown; scapus two times wider than pedicel ( Fig. 5 A–C). Compound eye oval, black with brown edge ( Fig. 5A and 5C ). Mandibular palp long, exceeding length of anterior tibia, last palpomere rounded, gradually widening from middle to the apex ( Fig. 5C ). Maxillary palp at least three times shorter than mandibular palp, last segment conspicuously widened ( Fig. 5C ).

Thorax. Pronotum with basal and lateral margins rounded, posterior margin straight, lateral lobe wider than high ( Fig. 5 A–B). Mesonotum and metanotum like pronotum, the first wider than latter ( Fig. 5 A–B). Prosternum collar-like, with two lobules armed with a tubercle near the lower margin for each lobe. Mesosternum rectangular, narrow and with a spine with the apex rounded on the middle of the anterior margin of each lobe. Metanotum triangular with a spine (more prominent than those of the other sternal segments) located in the middle of the lateral margin of each lobe.

Legs. Fore and mid femura dorsally rounded, with anterior, posterolateral and ventral margins flattened ( Fig. 5 A–B). Hind femur posteriorly with 19 chevron ridges ( Fig. 5A ).

Abdomen. Cercus robust, cylindrical, light brown at anterior half, conical at posterior half; anterior and posterior halves with same length; posterior half black at basal and medial thirds, remaining light brown, with rounded apex ( Fig. 5 D–F). Paraprocts dorsoventrally flattened, covered by long setae, conspicuously curved towards pleural margin ( Fig. 5D ). Subgenital plate almost twice longer than wide, rugose, posterior margin U-shaped emarginated, with long setae ventrally ( Fig. 5 D–F). Stylus long, wide, with rounded apex, conspicuously inward curved ( Fig. 5 D–F).

Genitalia. Dorsally with anterior margin conspicuously projected; titillator’s process with posterior margin light brown, both lobes conspicuously separated and rounded ( Fig. 6 A–D). Ejaculatory vesicles slightly smaller than titillator’s sclerite ( Fig. 6 C–D).

Coloration. Described based on dry specimen ( Fig. 5 A–B). Body dark brown, with light yellow spots. Legs light brown.

Measurements (mm). TL: 43; WF: 8; PL: 12; PH: 5,5; FF: 14: FT: 16,5; MF: 16: MT: 17,5; HF: 31; HT: 30; Lplac: 3,5; LC: 3,2.

Figures

FIGURE 5. Tintiyakus trewicki sp. nov., holotype male. A: habitus, lateral view; B: habitus, dorsal view; C: head, frontal view; D–F: Terminalia in dorsal, ventral and lateral view respectively. Abbreviations: Cer: cerci; Sty: styli; Pl: subgenital plate.

FIGURE 6. Tintiyakus trewicki sp. nov., male internal genitalia. A–B: phallus, ventral view; C–D: phallus, dorsal view. Abbreviations: TI: titillator process; EV: ejaculatory vesicles; DL: dorsal lobe(s); lw. vl.: lower folds of ventral lobe; up. vl.: upper folds of ventral lobe.

FIGURE 8. Geographical records of species Tintiyakus gen. nov.