Kryptolebiasinae .

This is a clade composed by a single genus with seven valid non-annual species, distributed in theAtlantic coastal basins and estuaries from Florida (USA) to southern Brazil. Three androdioecius species conform a monophyletic unit within the genus (Vermeulen, Hrbek, 2005; Costa et al., 2010) that inhabit mangroves; two of them with clear evidence of self-fertilization (Tatarenkov et al., 2011). Costa (2004) proposed two synapomorphies for Kryptolebias: a dorsally expanded flange on dorsal tip of the autopalatine (Fig. 1a) and a vestigial or absent anterodorsal process of urohyal (Fig. 2a).