Revision of the troglomorphic genus Troglostygnopsis Šilhavý, 1974 (Opiliones, Laniatores, Stygnopsidae) Author Cruz-López, Jesús A. 7D2ECD16-DDC3-4DE6-9C15-EF95C478E572 Colección Nacional de Arácnidos, Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México. 3 er. Circuito exterior s / n. Apartado Postal 70 - 153, C. P. 04510, Ciudad Universitaria, Coyoacán, Mexico City, Mexico. & Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP), Campo Experimental Valles Centrales, Oaxaca, Melchor Ocampo No. 7, C. P. 68200, Santo Domingo Barrio Bajo, Etla, Oaxaca, Mexico. thelyphonidito@gmail.com Author Francke, Oscar F. 8E9540FA-BF4F-4C9F-A3D8-D94768BE6C8D Colección Nacional de Arácnidos, Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México. 3 er. Circuito exterior s / n. Apartado Postal 70 - 153, C. P. 04510, Ciudad Universitaria, Coyoacán, Mexico City, Mexico. offb@ib.unam.mx text European Journal of Taxonomy 2021 2021-02-18 735 74 88 journal article 3469 10.5852/ejt.2021.735.1241 b496729a-abd4-4212-af76-b212cb9c2f88 2118-9773 5708138 327CCB1E-31AC-4121-926E-354AA324991C Genus Troglostygnopsis Šilhavý, 1974 Troglostygnopsis Šilhavý, 1974: 182 . ( type species: Troglostygnopsis anophthalma Šilhavý, 1974 , by original designation). Troglostygnopsis – Reddel 1981: 165. — Kury & Cokendolpher 2000: 149 . — Kury 2003: 240 . — Cruz-López & Francke 2013b: 300 ; 2015: 828 ; 2016: 328 ; 2017: 320 ; 2018: 1047 ; 2019b: 226 ; 2020: 433 . — Aguiñaga & Cruz-López 2019: 10 . — Cruz-López et al. 2019: 286. Emended diagnosis Troglomorphic members of Stygnopsinae , eyeless, similar condition as Mexotroglinus Šilhavý, 1977 , Toojah Cruz-López, in press, Chinquipellobunus madlae (Goodnight & Goodnight, 1967) and Serrobunus paulbryanti Aguiñaga & Cruz-López, 2019 . Troglostygnopsis has clear lateral areas on scutum, similar to Panzosus Roewer, 1949 , Paramitraceras , Philora , Sbordonia and Toojah ; however, Troglostygnopsis can be distinguished from other eyeless genera with lateral projections on scutum by the presence of a dorsal row of large spiniform tubercles on pedipalpal femur; in fact, no other genus of the family whether troglobitic or epigean has this protruding row. Male genitalia have the Paramitraceras -pattern sensu Cruz-López & Francke (2013b) : pars distalis tubular, with an apical depression where the follis arises, with many pairs of acute MS C on lateral sides, many pairs of spatulate MS A+B at the base and laterally on the pars distalis, two pairs of MS E, E1 small and in the middle of ventral side, E2 long and external to E1, and one or two pairs of MS D, near the base of follis. Troglostygnopsis can be differentiated from those genera with male genitalia with this pattern ( Paramitraceras , Panzosus , Philora and Sbordonia ) as follows: ocularium not pointing forward, pedipalps strongly armed with long spiniform setiferous tubercles, and males without glandular ventral tubercles on stigmatic area (in this last character similar to Sbordonia armigera Šilhavý, 1977 ). Included species Troglostygnopsis anophthalma Šilhavý, 1974 ( type species) and Troglostygnopsis kalebi sp. nov.