Physalaemus jordanensis is a small frog (SVL 24 mm in males) that belongs to the P. gracilis species group (Nascimento et al. 2005). Its body is elongated. Head narrow, snout pointed and rounded. Tympanum not well defined. Vomerine teeth absent, maxillary teeth present. Vocal sac well developed. Anterior members short. Dorsal color light brown with yellow vertebral. There is also a black inguinal gland. Venter with dense black pigments. The advertisement call is pulsed, with a call duration of 1.4-1.6 sec (Bokermann 1967).
The tadpole was described recently by Gomes et al. (2010). The body is ovoid and globular. Snout rounded. Dorsal fin origin at the body-tail junction. Oral disc antero-ventral, with a single row of marginal papillae. LTRF 2(2)/3(1). A detailed description of the buccopharyngeal morphology is available in Gomes et al. (2010).
Distribution and Habitat
Country distribution from AmphibiaWeb's database: Brazil
This species occurs in the Serra da Mantiqueira range in southeastern Brazil. Like other members of the P. gracilis species group, P. jordanensis is restricted to high elevation areas. It is known from the type locality in Campos do Jordão (1,628 m a.s.l.), State of São Paulo, in addition to Poços de Caldas (1,196 m a.s.l.) and Airuoca (1,800 m a.s.l.) in Southern Minas Gerais State, all in southeastern Brazil. P. jordanensis lives in swamps in open areas.
Life History, Abundance, Activity, and Special Behaviors
The calling activity takes place at night in the rainy season, between November and March (Tolledo et al. 2009) in swamps and flooded areas in open areas or near secondary forests (Tolledo et al. 2009), where it builds a floating foam nest. The tadpole is found in temporary ponds in highland grasslands (Gomes et al. 2010). More information is needed about its natural history and habitat requirements.
Trends and Threats
The species is locally abundant and its range is inside protected areas, such as Parque Estadual de Campos do Jordão, in the State of São Paulo and Parque Estadual da Serra do Papagaio, in the State of Minas Gerais.
Possible reasons for amphibian decline
General habitat alteration and loss
Habitat modification from deforestation, or logging related activities
Intensified agriculture or grazing
Subtle changes to necessary specialized habitat
A distribution map and a picture of an adult male can be found in Tolledo et al. (2009).
Bokermann, W. C. A. (1967). ''Três novas espécies de Physalaemus do sudeste brasileiro (Amphibia, Leptodactylidae).'' Revista Brasileira de Biologia, 27(3), 135-143.
Gomes, F. B. R., Provete, D. B., and Martins, I. A. (2010). ''The tadpole of Physalaemus jordanensis Bokermann, 1967 (Anura, Leiuperidae) from Campos do Jordão, Serra da Mantiqueira, Southeastern Brazil.'' Zootaxa, 2327(3), 65-68.
Nascimento, L.B., Caramaschi, U., and Cruz, C.A.G. (2005). ''Taxonomic review of the species groups of the genus Physalaemus Fitzinger, 1826 with revalidation of the genera Engystomops Jiménez-de-la-Espada, 1872 and Eupemphix Steindachner, 1863 (Amphibia, Anura, Leptodactylidae).'' Arquivos do Museu Nacional, 63, 297-320.
Tolledo, J, Oliveira, E.F., Feio, R.N., and Weber, L.N. (2009). ''Amphibia, Anura, Leiuperidae, Physalaemus jordanensis Bokermann, 1967: distribution extension and geographic distribution map.'' Check List, 5(3), 422-424.
Written by: Diogo B. Provete (2010-01-14)
Edited by: Kellie Whittaker (2010-03-22)
Species Account Citation: AmphibiaWeb 2010 Physalaemus jordanensis: Jordans Dwarf Frog <https://amphibiaweb.org/species/3403> University of California, Berkeley, CA, USA. Accessed Apr 11, 2021.
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Citation: AmphibiaWeb. 2021. <https://amphibiaweb.org> University of California, Berkeley, CA, USA. Accessed 11 Apr 2021.
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