Brachycephalus Fitzinger, 1826
Brachycephalus Fitzinger, 1826, Neue Class. Rept.: 39. Type species: Bufo ephippium Spix, 1824, by monotypy.
Ephippipher Cocteau, 1835, Mag. Zool., Guérin, 5: 12. Replacement name for Brachycephalus Fitzinger, 1826.
Ephippifer — Agassiz, 1845, Nomencl. Zool., Fasc. 7 & 8: 17. Incorrect subsequent spelling of Ephippipher Cocteau, 1835.
Psyllophryne Izecksohn, 1971, Bol. Mus. Nac., Rio de Janeiro, N.S., Zool., 280: 2. Type species: Psyllophryne didactyla Izecksohn, 1971, by original designation. Synonymy by Kaplan, 2002, Amphibia-Reptilia, 23: 227.
Saddleback Toads (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 38).
Three-toed Toadlets (Halliday and Adler, 2002, New Encyclop. Rept. Amph.: 85).
Flea Toads (Napoli, Caramaschi, Cruz, and Dias, 2011, Zootaxa, 2739: 33).
Izecksohn's Toads (Psyllophryne [no longer recognized]: Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 38).
See comments on the status of the former nominal genera Brachycephalus and Psyllophryne by Pombal, Wistuba, and Bornschein, 1998, J. Herpetol., 32: 70–74, as well as by Kaplan, 2002, Amphibia-Reptilia, 23: 227. See comments under Adelophryne and Euparkerella. Alves, Ribeiro, Haddad, and Reis, 2006, Herpetologica, 62: 221–233, provided considerable information on the external morphology and osteology of the species of Brachycephalus. Silva, Campos, and Sebben, 2007, Zootaxa, 1422: 59–68, commented on the auditory region and the monophyly of the genus. Heinicke, Duellman, and Hedges, 2007, Proc. Natl. Acad. Sci. USA, 104: 10092–10097, provided additional evidence for Brachycephalus being imbedded within the former Eleutherodactylinae. See comment under Brachycephalidae. Pombal, 2010, Bol. Mus. Nac., Rio de Janeiro, N.S., Zool., 526: 1–12, redelimited the species of Brachycephalus. Clemente-Carvalho, Klaczko, Perez, Alves, Haddad, and Reis, 2011, Mol. Phylogenet. Evol., 61: 77–89, reported on molecular phylogenetics and phenotypic diversity. Pyron and Wiens, 2011, Mol. Phylogenet. Evol., 61: 543–583, in their study of Genbank sequences, confirmed the sister taxon relationship of Brachycephalus and Ischnocnema. Padial, Grant, and Frost, 2014, Zootaxa, 3825: 50–51, summarized the literature of the systematics of the group and corroborated the results of Clemente-Carvalho, Klaczko, Perez, Alves, Haddad, and Reis, 2011, Mol. Phylogenet. Evol., 61: 79–89, that two major clades exist in the genus: 1) a southern clade formed by locally endemic species restricted to the high and humid Atlantic Forest of Paraná (Brachycephalus brunneus, Brachycephalus ferruginus, Brachycephalus izecksohni, Brachycephalus pernix, and Brachycephalus pombali) and the northern clade, allopatric to the first, distributed from farther north in Paraná to Espírito Santo (Brachycephalus alipioi, Brachycephalus didactylus, Brachycephalus ephippium, Brachycephalus garbeanus, Brachycephalus hermogenesi, Brachycephalus nodoterga, Brachycephalus pitanga, Brachycephalus toby, and Brachycephalus vertebralis), with the two species of the former Psyllophryne placed separately in the second clade. Ribeiro, Bornschein, Belmonte-Lopes, Firkowski, Morato, and Pie, 2015, PeerJ, 3 (e1011): 1–35, formalized the two arguably monophyletic groups as the a) Brachycephalus ephippium group (found in the states of Rio de Janeiro, Sao Paulo, and Espirito Santo), b) Brachycephalus pernix group (Parana and Santa Catarina), and c) the Brachycephalus didactylus group for former Psyllophryne.
Contained taxa (30 sp.):
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