<P> Many species of poison dart frogs are dedicated parents . Many poison dart frogs in the genera Oophaga and Ranitomeya carry their newly hatched tadpoles into the canopy; the tadpoles stick to the mucus on the backs of their parents . Once in the upper reaches of the rainforest trees, the parents deposit their young in the pools of water that accumulate in epiphytic plants, such as bromeliads . The tadpoles feed on invertebrates in their nursery, and their mother will even supplement their diet by depositing eggs into the water . Other poison frogs lay their eggs on the forest floor, hidden beneath the leaf litter . Poison frogs fertilize their eggs externally; the female lays a cluster of eggs and a male fertilizes them afterward, in the same manner as most fish . Poison frogs can often be observed clutching each other, similar to the manner most frogs copulate . However, these demonstrations are actually territorial wrestling matches . Both males and females frequently engage in disputes over territory . A male will fight for the most prominent roosts from which to broadcast his mating call; females fight over desirable nests, and even invade the nests of other females to devour competitor's eggs . </P> <P> The operational sex ratio in the poison dart frog family is mostly female biased . This leads to a few characteristic behaviors and traits found in organisms with an uneven sex ratio . In general, females have a choice of mate . In turn, males show brighter coloration, are territorial, and are aggressive toward other males . Females select mates based on coloration (mainly dorsal), calling perch location, and territory . </P> <P> Dart frogs are the focus of major phylogenetic studies, and undergo taxonomic changes frequently . The family Dendrobatidae was revised taxonomically in 2006 and contains 13 genera, with about 170 species . </P> <Table> <Tr> <Th> Genus name and authority </Th> <Th> Common name </Th> <Th> Species </Th> </Tr> <Tr> <Td> Adelphobates (Grant, et al., 2006) </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Andinobates (Twomey, Brown, Amézquita & Mejía - Vargas, 2011) </Td> <Td> </Td> <Td> 13 </Td> </Tr> <Tr> <Td> Ameerega (Bauer, 1986) </Td> <Td> </Td> <Td> 31 </Td> </Tr> <Tr> <Td> Colostethus (Cope, 1866) </Td> <Td> Rocket frogs </Td> <Td> 21 </Td> </Tr> <Tr> <Td> Dendrobates (Wagler, 1830) </Td> <Td> Poison dart frogs </Td> <Td> 5 </Td> </Tr> <Tr> <Td> Epipedobates (Myers, 1987) </Td> <Td> Phantasmal poison frogs </Td> <Td> 6 </Td> </Tr> <Tr> <Td> Excidobates (Twomey and Brown, 2008) </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Hyloxalus (Jiménez de la Espada, 1870) </Td> <Td> </Td> <Td> 58 </Td> </Tr> <Tr> <Td> Minyobates (Myers, 1987) </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Oophaga (Bauer, 1994) </Td> <Td> </Td> <Td> 9 </Td> </Tr> <Tr> <Td> Phyllobates (Duméril and Bibron, 1841) </Td> <Td> Golden poison frogs </Td> <Td> 6 </Td> </Tr> <Tr> <Td> Ranitomeya (Bauer, 1986) </Td> <Td> Thumbnail dart frogs </Td> <Td> 21 </Td> </Tr> <Tr> <Td> Silverstoneia (Grant, et al., 2006) </Td> <Td> </Td> <Td> </Td> </Tr> </Table>

How many types of poison dart frogs are there