E: endemic species,
GA: species only distributed in the Major Antilles,
GLA: species distributed in West Indies
ACA: species distributed in Antilles and Central America,
ANS: species distributed in Antilles, North and South America
ACS: species distributed in Antilles, Central America and SouthAmerica  ,                                                                                                                                                                  AA: species distributed in Antilles and the American continent.
BRK: species that inhabit brackish water,
ED: freshwater species strictly
EDM:  freshwater species that invade the sea in some stage of their cycle of life,
TRO: Troglobitic species .
A: Abundant species,
MA: very abundant species,
SC: scarce species,
RE: rare species.