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Description

provided by AmphibiaWeb articles
Leptodactylus mystacinus is a moderately sized species of frog, ranging from 44-65 mm SVL in adult males and 54-67 mm SVL in adult females. The two genders can be distinguished from from one another by the flatter snouts and lack of asperities on the thumbs and chest of adult males. Both genders have heads that are proportionally as long as they are wide. This species has relatively short back legs with narrow, smooth toe tips. Much of the lower leg is covered in white tubercles, and among most individuals, these nodules continue down across the top and bottom of the foot. As the specific epithet suggests, a light stripe of color covers the upper lip like a mustache. Coloration differs among individuals; the dorsal region can be a solid brown, or it may be striped or dotted with dark brown. The ventral region is usually either a solid light color or mottled with different shades of brown. In individuals with mottled bellies, the coloring is more intense around the arm insertions.In the larval stage, the dorsal fin and body length of Leptodactylus mystacinus are clearly differentiated; the dorsal fin ends where the body begins. Larvae are usually 46-48 mm long, with 17-18 mm of that length taken up by the body. Eye diameters are about 10% of this body size, while oral disks are almost 23%. L. mystacinus larvae have brown bodies and brown and cream mottled tails (Heyer et al. 2003).In Greek, "mystax" means upper lip or mustache. The light coloration covering the lip of Leptodactylus mystacinus is distinct in most individuals, giving the appearance of a mustache (Heyer et al. 2003).

Reference

Heyer, M.M., Heyer, W. R., Spear, S., and de Sa, R. O. (2003). ''Leptodactylus mystacinus.'' Catalogue of American Amphibians and Reptiles. Society for the Study of Amphibians and Reptiles, 767.1-767.11.

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Distribution and Habitat

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Leptodactylus mystacinus is found in subtropical arid and mesic regions throughout much of the mideastern portion of South America. It ranges from the Yungas Mountains in northwestern Argentina to the eastern slopes of the Andes Mountains in Bolivia, and over into Uruguay and around Bahia, Brazil. L. mystacinus usually inhabits forests with closed canopies, but has also been found in clearings throughout the central and southern Atlantic Forests in Brazil (Heyer et al. 2003).
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Life History, Abundance, Activity, and Special Behaviors

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The advertising call of L. mystacinus consists of a single note repeated an average of 250-400 times per minute for a length of 0.04-0.06 seconds. When recorded, it was found that this call had very little amplitude or frequency modulation. The frequency is generally 2050-2500 Hz, with a minimal rise of 50 Hz possible from the start to the end of the call (Heyer et al. 2003).
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Comprehensive Description

provided by Smithsonian Contributions to Zoology
Leptodactylus mystacinus (Burmeister)

MATERIAL.—USNM 241303 (single specimen dissected, stage 37, SVL 12.2 mm). Collected from a temporary pond in a clearing at Fazenda do Veado, Serra da Bocaina, São Paulo, Brazil, 3 January 1977.

REFERENCE.—Sazima (1975) described and figured the external larval morphology.

GENERAL
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bibliographic citation
Wassersug, Richard J. and Heyer, W. Ronald. 1988. "A survey of internal oral features of Leptodactyloid larvae (Amphibia: Anura)." Smithsonian Contributions to Zoology. 1-99. https://doi.org/10.5479/si.00810282.457

Leptodactylus mystacinus

provided by wikipedia EN

Leptodactylus mystacinus is a species of frog in the family Leptodactylidae. It is found in eastern Bolivia and eastwards to Brazil, Paraguay, and Uruguay and southwards to central Argentina.[1][2][3] It is also known as the mustached frog.[2][3]

Description

Adult males measure 44–65 mm (1.7–2.6 in) and adult females 54–67 mm (2.1–2.6 in) in snout–vent length. The snout in males is more spatulate than in females. A pair of dorsolateral folds runs from behind the eye to the upper groin; a second pair is either incomplete or interrupt and starts from the forearm insertion and runs along the flanks. The toes lack fringes and fleshy ridges, the toe tips are narrow. The dorsum is uniform, striped, or bears small dark spots. The upper pair of dorsolateral folds is lined with a distinct dark brown stripe or band below and usually with a light pinstripe above; the latter becomes often broader and more distinct posteriorly. The lower dorsolateral folds along the flanks may have dark or cream highlights, or both. The upper lip typically has a distinct light stripe. The venter ranges from being immaculate to mottled.[3]

Habitat and conservation

Leptodactylus mystacinus is a terrestrial frog found in grasslands near standing bodies of water, its breeding habitat. Reproduction takes place in under-ground foam nests; the tadpoles develop in water. Some populations are found in forests and formerly forested areas. It is found at elevations below 1,800 m (5,900 ft). It is a common species that adapts well to human disturbance. It occurs in several protected areas and is not considered threatened by the International Union for Conservation of Nature (IUCN).[1]

References

  1. ^ a b c Ronald Heyer, Débora Silvano, Steffen Reichle, Esteban Lavilla, Ismael di Tada (2010). "Leptodactylus mystacinus". IUCN Red List of Threatened Species. 2010: e.T57147A11591930. doi:10.2305/IUCN.UK.2010-2.RLTS.T57147A11591930.en. Retrieved 15 November 2021.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  2. ^ a b c Frost, Darrel R. (2019). "Leptodactylus mystacinus (Burmeister, 1861)". Amphibian Species of the World: an Online Reference. Version 6.0. American Museum of Natural History. Retrieved 4 February 2019.
  3. ^ a b c Heyer, Miriiam Muedeking; Heyer, W. Ronald; Spear, Stephen & de Sá, Rafael O. (2003). "Leptodactylus mystacinus". Catalogue of American Amphibians and Reptiles. 767: 1–9. doi:10.15781/T2RR1PR7C.
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Leptodactylus mystacinus: Brief Summary

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Leptodactylus mystacinus is a species of frog in the family Leptodactylidae. It is found in eastern Bolivia and eastwards to Brazil, Paraguay, and Uruguay and southwards to central Argentina. It is also known as the mustached frog.

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