Species Description: Cuevas, C. C., Formas J. R. (2001). "A new species of Alsodes (Amphibia, Anura, Leptodactylidae) from central Chile. Amphibia-Reptilia 22: 187–198.
© 2013 Bert Willaert (1 of 3)
Alsodes hugoi, at larval stage 25 have a total length of 37.9 ± 3.60, body weight of 15.9 ± 1.59, body depth of 6.5 ± 0.89, and fin depth of 6.4 ± 0.62. Their average body length is 16 mm and average 6.5 fin depth. They have ovoid bodies and round snouts. They are are 2.6 times longer than wide. The snout is round. Their small nostrils are located between the tip of their snout and their eyes. Their eyes are antero-dorsolateral, and the distance between their eyes is similar to the distance between their nostrils. These eyes have circular pupils. Their intra-angular oral disc is translucent and its width is 1.4 times the interocular distance of the tadpole. Here a rostral gap is present, but not a mental gap. A line of marginal papillae is found around the periphery of the oral disc with the exception of the rostral region. Sparse intramarginal papillae are found in the disc’s mental region. The labial tooth row formula is (1)(1-1)/(1-1)(2). The spiracle tube is sinistral and laterally located. The proctodeal tube is transparent, wide, and dextrally located. The dorsal fin starts on the posterior third of the body and the ventral fin starts at the end of the proctodeal tube. These transparent fins join to create a tail with a rounded tip. The total fin depth does not exceed the body depth (Cuevas and Formas 2001, Cuevas et al. 2005).
In life, the adult dorsal coloration of back, arms, and legs is light brown with golden tints. Bars are present on the legs and arms with black spots on the dorsum. The thorny excrescences of the first finger are brown in color. Ventral coloration is an off-white (Cuevas and Formas 2001).
The tadpoles’ irises are golden spotted with black reticulations. Many small melanophores are also distributed along the tail fins (Cuevas and Formas 2001, Cuevas et al. 2005).
Distribution and Habitat
Life History, Abundance, Activity, and Special Behaviors
Possible reasons for amphibian decline
General habitat alteration and loss
According to Cuevas and Forma (2001), the species is in the Alsodes monticola group.
Karyotypes show 26 biarmed chromosomes (Cuevas and Formas 2001).
Cuevas, C. C. and Formas, J. R. (2005). ''A new frog of the genus Alsodes (Leptodactylidae) from the Tolhuaca National Park, Andes Range, southern Chile.'' Amphibia-Reptilia, 26, 39-48.
Cuevas, C. C., and Formas, J.R. (2001). ''A new species of Alsodes (Amphibia, Anura, Leptodactylidae) from Central Chile.'' Amphibia-Reptilia, 22, 187-198.
Gosner, K. L. (1960). ''A simplified table for staging anuran embryos and larvae with notes on identification.'' Herpetologica, 16(3), 183-190.
Originally submitted by: Raul E. Diaz (first posted 2004-06-03)
Description by: Daley McGhee, Jenna Turpin, Zoe Merck (updated 2021-07-08)
Distribution by: Daley McGhee, Jenna Turpin, Zoe Merck (updated 2021-07-08)
Life history by: Daley McGhee, Jenna Turpin, Zoe Merck (updated 2021-07-08)
Comments by: Daley McGhee, Jenna Turpin, Zoe Merck (updated 2021-07-08)
Edited by: Kellie Whittaker, Michelle S. Koo, Ann T. Chang (2021-07-08)
Species Account Citation: AmphibiaWeb 2021 Alsodes hugoi <https://amphibiaweb.org/species/5836> University of California, Berkeley, CA, USA. Accessed Dec 4, 2021.
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Citation: AmphibiaWeb. 2021. <https://amphibiaweb.org> University of California, Berkeley, CA, USA. Accessed 4 Dec 2021.
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