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family. Clarence and Marie Goodnight, however,place all of these species,in the family Phalangodidae.The latter family is used in this report, but the mostrecent generic allocations are used until a thoroughrevisionary study is made of this group.Family CosmetidaeThe family Cosmetidae includes no troglobites,but a total of seven cave inhabiting species are knownfrom Mexico and Belize (see Fig. 46). Goodnight andGoodnight (1973) described Cynorta guadalupensisfrom one cave in San Luis Potosi and C. jamesonifrom numerous caves in San Luis Potosi and Tamaulipas.Goodnight and Goodnight (1977) reported thepresence of Vonones compressus (Cambridge) andErginulus roeweri (Goodnight and Goodnight) fromcaves in Yucatan; E. bimaculata Goodnight andGoodnight from caves in Campeche and Yucatan;and E. serratipes (Cambridge) from Rio Frio Cave,Belize.Family PhalangodidaeThe most frequently found group of opilionids intropical American caves are those belonging to thefamily Phalangodidae (including the Stygnopsidae).Thirteen species of phalangodids are believed to be\"-" "-"-\)\",,-i,}-/I'\'\\\I" \.)." ~\\\..~, ",~-- -_.;,MEXICOr f -- \..'-- /-- \ )I,' .....1-- -'-IiI'. I,,- I 7"- I-'- '\'., I, !I/GUATEMALAIII\I.­~/r\r"/Fig. 46.-Distribution of troglobitic and troglophilic opilionids of the families Cosmetidae and Sironidae: 1, Cynortajamesoni; 2, C. guadalupensi3; 3, Neogovea mexasca; 4, Erginulus bimaculata; 5, E. roeweri; 6, Vonones compressus; 7, E.serratipes.160