Physalaemus riograndensis Milstead, 1960

Class: Amphibia > Order: Anura > Family: Leptodactylidae > Subfamily: Leiuperinae > Genus: Physalaemus > Species: Physalaemus riograndensis

Physalaemus riograndensis Milstead, 1960, Copeia, 1960: 87. Holotype: FMNH 82578, by original designation. Type locality: "small pond flooded by rains . . . . 4 kilometers southeast of Osório, Rio Grande do Sul, Brazil".

English Names

Rio Grande Dwarf Frog (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 83).


Corrientes, Formosa, Santa Fé, Misiones, and Entre Rios provinces (Argentina), Uruguay, southern Paraguay (itapúa and Presidente Hayes provinces), and Rio Grande do Sul (Brazil).


In the Physalaemus henselii group of Nascimento, Caramaschi, and Cruz, 2005, Arq. Mus. Nac., Rio de Janeiro, 63: 310. Tomatis, Baldo, Kolenc, and Borteiro, 2009, J. Herpetol., 43: 555-560, rejected this group as nonmonophyletic. See account by Cei, 1980, Monit. Zool. Ital., N.S., Monogr., 2: 402-404. Achaval and Olmos, 2003, Anf. Rept. Uruguay, ed. 2: 32, provided a brief account and photograph for the Uruguay population. Brusquetti and Lavilla, 2006, Cuad. Herpetol., 20: 18, briefly discussed the range in Paraguay. Chebez, Krauczuk, and Bosso, 1995, Cuad. Herpetol., 9: 58-59, reported the species in Misiones Province, Argentina, and Céspedez, 1996, Cuad. Herpetol., 10: 75-77, reported the species in Formosa, Argentina. Borteiro and Kolenc, 2007, Zootaxa, 1638: 1–20, described larval morphology from the Uruguay population. Weiler, Núñez, Airaldi, Lavilla, Peris, and Baldo, 2013, Anf. Paraguay: 106, provided a brief account, image, and dot map for Paraguay.  In the Physalaemus cuvieri clade, Physalaemus biligonigerus species group, of Lourenço, Targueta, Baldo, Nascimento, Garcia, Andrade, Haddad, and Recco-Pimentel, 2015, Mol. Phylogenet. Evol., 92: 204–216. Hepp and Pombal, 2020, Zootaxa, 4725: 1–106, discussed this species as part of a genus-wide discussion of bioacoustical traits among the species. 

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