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Caecoa arganoi Silhav-yCaecoa arganoi Silhav-y, 1974:176, 189, 191, fig. 6(38-41), 7(42).Type-locality.-Cueva de Coatepec, Coatepec Harinas,Mexico, Mexico.Distribution.-Known only from the type-locality.See Fig. 49.Discussion.-This eyeless species is the type andonly known species of the genus.Cynortina misteca Goodnight and GoodnightCynortina misteca Goodnight and Goodnight, 1977:142, 143, fig. 3a,3b.Type-locality.-Footprint Cave, 4 km southwest ofCaves Branch, Cayo District, Belize.Distribution.-Known only from the type-locality.See Fig. 49.Discussion.-This pale, eyeless species is mostclosely related to C. acanthotibialis Goodnight andGoodnight from Chiapas, Guatemala, and Belize.Cynortina minutus (Goodnight and Goodnight) wasdescribed from Resumidero del Rio San Geronimo,Guerrero.Hoplobunus apoalensis Goodnight and GoodnightHoplobunus apoalensis Goodnight and Goodnight,1973:84,85,86-87, fig 4-5 ..I -J........._._.,I '\..... ,r '\)-.. \\l".\( ',;>-.., ). \~ \\"-~ '"'---. '-",-,.....;...r-,er,:-../'!'; I) ,... " ' ,- I .-(~ :,-.,/" -,~ L-....-J-.JMEXICO,.1',~".......... '.3 _J' 7.... '~-/-:GUATEMALAI\.-'"-......"i......,iI .•'-------//\I\ i'./'-'-'-"-,I,IIiI/r,... ." r'.-'//Fig. 49.-Distribution of troglobitic opilionids of the family Nemastomatidae and of troglophilic and troglobitic phalangodidopilionids of the genera Stygnomma, Caecoa, Cynortina, and Mexotroglinus: 1, Ortholasma sbordonii; 2, Stygnommatuberculata; 3, Caecoa arganoi; 4, Cynortina minutus; 5, Mexotroglinus sbordonii; 6, Cynortina misteca and S. pecki.163