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troglobites in the caves of Mexico and Belize. Theseare currently placed in the genera Caecoa, Cynortina,Hoplobunus, Mexotroglinus, Stygnomma, and Troglostygnopsisand are discussed below.Silhavy (1977) described three genera for speciescollected in caves in Chiapas (see Fig. 47). Arganotuswas described to include Phalangodinus macrochelisGoodnight and Goodnight; this species, previouslyknown from Ocosingo, Chiapas, was collected inCueva del Sabin, Chiapas. Akdalima vomeroi was describedfrom Cueva del Sabin, Chiapas. SbordoniLJwas described to include Paramitraceras paroulaGoodnight and Goodnight, an epigean species fromChiapas, and SbordoniLJ armigera n. sp. from Sotanode Malpaso, Chiapas. Silhary (1979) described Arganotusstrinatii from Cueva Chirrepeck, Alta Verapaz,Guatemala.Goodnight and Goodnight (1971) described fivenew species of the genus Karos from Mexican caves:K. depressus from Sumidero del Llano Conejo, Queretaro;K. gratiosus from caves in the Xilitla andAgua Buena regions of San Luis Potosi and from acave near Huautla de Jimenez, Oaxaca; K. parousfrom caves in the Sierra de EI Abra, Tamaulipas, andthe Micos and Valle de los Fantasmas regions of SanLuis Potosi; K. projectus from Cueva del AhuateMEXICOGUATEMALA/.//rr·'-.".-'Fig. 47.-Distribution of troglophilic phalangodid opilionids of the genera Pe/lobunus, Paramitraceros, Sbordonia, Arganotus,and Akda/ina: 1, Pe/lobunus mexicanus; 2, Paramitraceros granulotus; 3, Paramitraceros femora/is and Sbordoniaarmigera; 4, Arganotus macroche/is and Akdalina vomeroi; 5, Paramitraceros hispidu/us; 6, Arganotus strinatii.161