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Type-locality.-Cueva de Apoala, Santiago Apoala,20 km N Asuncion Nochixtlan, Oaxaca, Mexico.Distrihution.-Known only from the type-locality.See Fig. 50.Discussion.-This species has very small eyes whichappear to have lost the retinas. It was collected fromwalls and silt hanks in a moist room above the streampassage.Hoplobunus boneti (Goodnight and Goodnight)Serrobunus boneti Goodnight and Goodnight, 1942:2-3, fig. 7-11; Goodnight and Goodnight, 1945:3-4; Bonet, 1946a:115.Opilion, troglobio: Anonymous, 1942a:221.Serrobunus: Goodnight and Goodnight, 1953:20.Hoplobunus: Goodnight and Goodnight, 1953:20.Hoplobunus boneti: Goodnight and Goodnight,1971:38,40, fig. 18-19; Mitchell, 1971a:392-394;Reddell, 1971b:35; Reddell and Mitchell, 1971a:149, fig. 21-22; Goodnight and Goodnight, 1973:87; Reddell and Elliott, 1973a:I71, 174; Reddelland Elliott, 1973b:181, 184; Silhary, 1974:176,178,182, fig. 1(5-8); Vomero, 1974:345;FernandezRuiz, 1976:716, 717; Goodnight and Goodnight,1976:662.MEXICO////II,,GUATEMALA, , , /, /'/ IIIIII: i\",.-, ~-"--L. ·_·-·LJ·I......·/[ ,,- ~ t 1,./ \..-' \12 '-. I• .12 '-', i'-"1iI L./r'r\r'.... '.--r/Fig. SO.-Distribution of troglobitic and troglophilic phalangodid opilionids of the genera Hoplobunus, Troglostygnopsis,and Stygnopsis: 1, Hoplobunus osorioi; 2, Troglostygnopsis inops; 3, H. mexicanus and T. inops; 4, H. boneti; 5, H. planus;6, T. queretarius; 7, Stygnopsis robustus; 8, H. mexicanus; 9, H. spinooculorum; 10, H. apoalensis; 11, H. oaxacensis; 12, T.anophthalma; 13, H. %ullinii.164