Bolton, 1995b: 187; Schmidt & Shattuck, 2014: 196 (species checklist).
Baroni Urbani, 1975b: 298 (all species key); Varghese, 2006b: 90 (all species key); Schmidt & Shattuck, 2014: 194 (diagnosis, synoptic description, distribution, ecology and behavior, phylogenetic and taxonomic considerations).
Extant: 5 valid species
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