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Family AtyidaeThe family Atyidae is entirely freshwater with theexception of two species of Typhlatya which inhabitmarine or brackish water on Ascension Island andIsla de Santa Cruz, Galapagos Islands (Chace andManning, 1972). Troglobitic species of atyid areknown from Europe, Japan, Africa, Madagascar,Australia, Fiji, the United States, Cuba, Puerto Rico,and Mexico.Typhlatya campecheae Hobbs and HobbsTyphlatya campecheae Hobbs and Hobbs, 1976:6-10,14, 15, 16, 20, 21, fig. 3-4; Hobbs et al., 1977:6,8, 11, 12, 24, 32, 33, fig. 7-8; Holthuis, 1977:174; Reddell, 1977b:230, 240, 241, 243, 249;Hobbs, 1979:618, 619-620, 621, 624, 625, 626,629, fig. 1.Typhlatya (part): Hobbs et al., 1977:5, 13, 32.Type-Iocality.-Grutas de Xtacumbilxunam, Bolonchenticul,Campeche, Mexico.Distribution.-Known only from two caves inCampeche. See Fig. 14.Records.-Campeche: Cenote de Cantemo andGrutas de Xtacumbilxunam.Discussion.-This species was found to be extremelyabundant in guano-floored pools at the type-MEXICOI,lGUATEMALAFig. 14.-Distribution of troglobitic shrimps of the families Alphaeidae and Atyidae: 1, Alpheopsis stygicola; 2, Typhlatyacampecheae; 3, T. pearsei; 4, T. mitchelli; 5, T. pearsei and T. mitchelli.106