Three new species of the spider genus Plato and the new genus Cuacuba from caves of the states of Pará and Minas Gerais, Brazil (Araneae, Theridiosomatidae)

Cuacuba mariana sp. n. A embolus, cut out B same, detail of embolic apophysis C same, cut out D same, detail of embolic opening E same, detail of embolic opening F same, detail of embolic opening. Abbreviations: E embolus; EA embolic apophysis; O embolic opening; PP pars pendula. Scale bars: A 0.1; B 0.05; C 0,1 D 0.02; E 0.01; F 0.005 mm.