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Southern Flinders Ranges Froglet

Crinia riparia Littlejohn & Martin 1965

Description

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Crinia riparia is a small frog species from southern Australia. Snout-vent length ranges 19.5-25.2mm. The dorsum is usually covered in fine warts, or is smooth. The snout is short and somewhat pointed. The tympanum is indistinct. Indistinct vocal sac in males. The digits are long and unwebbed, with fringes on the toes. Ventral surface varies in granularity, and may be entirely smooth. Females are larger than the males (Littlejohn and Martin 1965). C. riparia is distinguished from other Crinia species mainly by call, coloration, and larval morphology. The back pattern polymorphism seen in C. signifera and C. parinsignifera is incompletely expressed in C. riparia. C. riparia also has longer feet than either C. signifera or C. parinsignifera, and lacks a tarsal fold (Littlejohn and Martin 1965). Adult C. riparia are morphologically indistinguishable from adult C. flindersensis (Donnellan et al. 2012). Coloration in life: C. riparia are typically brown dorsally, and white or cream ventrally with black mottling. Throat grey in males, flesh colored in females. Color and pattern, however, are highly variable both dorsally and ventrally. Tadpole Morphology: C. riparia tadpoles have small streamlined bodies, which are wider than tall. They can reach a total length of up to 38mm with a minimum body length of 12.9mm (seen in a tadpole at stage 36). The nares open dorsally and have a small flap. The eyes are dorsolaterally located with golden irises. The tail is just over twice the length of the body. (Donnellan et al. 2012). C. riparia and its sister species C. flindersensis are mostly easily distinguished morphologically by their tadpoles. C. riparia tadpoles are less rounded in shape, have a less arched tail fin, a longer tail, and a wider oral disc which is more adapted to fast flowing water (Donnellan et al. 2012). The tadpoles metamorphose in spring (from October to December), with a snout-vent length of 9.7-11.4 mm. Their morphology and coloration is that of a miniature adult, with a translucent grey venter (Donnellan et al. 2012). Tadpole Coloration: C. riparia larvae range from golden brown (Horrock's Pass) to dark brown or black (Alligator Gorge) dorsally. The tadpoles have copper iridophores throughout the body, which increase in number as the larvae grows (Donnellan et al. 2012).The species authorities for C. riparia are M.J. Littlejohn and A.A. Martin. The original paper C. riparia by Littlejohn and Martin (1965) included specimens from the Northern Flinders Ranges as part of C. riparia. These are now identified as C. flindersensis, the Northern Flinders Ranges froglet, described in Donnellan et al. 2012. C. riparia is most closely related to C. flindersensis. Other related species include C. signifera and C. parinsignifera (Donnellan et al. 2012).

References

  • Donnellan, S., Anstis, M., Price, L., and Wheaton, L. (2012). ''A new species of Crinia (Anura: Myobatrachidae) from the Flinders Ranges, South Australia.'' Zootaxa, 3499, 1-26.
  • Littlejohn, M. J. and Martin, A. A. (1965). ''A new species of Crinia (Anura: Leptodactylidae) from South Australia.'' Copeia, 3, 319-324.

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Distribution and Habitat

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The species is found in the southern Flinders Ranges, between Mt. Brown Conservation Park in the north and Napperby Gorge in the south (Donnellan et al. 2012).
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Life History, Abundance, Activity, and Special Behaviors

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The call of C. riparia is a long, harsh, irregularly repeated note which can be described by the sound "kra-a-a-a-ack" (Littlejohn and Martin 1965). Adult C. riparia are found beneath boulders and stones on the edges of rock-strewn creeks. Spawn is laid beneath rocks at the edge of creeks (Barker et al. 1995). The streams inhabited by C. riparia end to have steeper slopes, faster moving water, and less vegetation than the habitats of other Crinia species. The tadpoles are benthic grazers and are adapted to fast moving water, with a flattened body, low fins, and wide oral disc (Donnellan et al. 2012).
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Life History, Abundance, Activity, and Special Behaviors

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No known declines.ThreatsNone known.Conservation MeasuresNone in place.
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Crinia riparia ( Catalan; Valencian )

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Crinia riparia és una espècie de granota de la família Myobatrachidae que viu a Austràlia. El rang d'aquest endèmic d'Austràlia es limita a una petita àrea de la serralada Flinders al centre d'Austràlia del Sud. S'ha registrat a 200-600m des del nivell del mar. L'extensió de la presència de l'espècie és d'aproximadament 56.000km2. Aquesta espècie es troba per sota dels còdols i pedres a les vores de rierols pedregosos. Les cries es posen sota les roques a la vora dels rierols. Els capgrossos s'adapten als rierols de corrent ràpid. Pel que sembla, es reprodueixen a la primavera. No hi ha amenaces significatives per a la supervivència d'aquesta espècie. L'espècie es troba en Flinders Ranges National Park.[1]

Referències

  1. Jean-Marc Hero; Peter Robertson; Frank Lemckert. Crinia riparia. UICN 2008. Llista Vermella d'espècies amenaçades de la UICN, edició 2008, consultada el 15-09-2014.
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Crinia riparia: Brief Summary ( Catalan; Valencian )

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Crinia riparia és una espècie de granota de la família Myobatrachidae que viu a Austràlia. El rang d'aquest endèmic d'Austràlia es limita a una petita àrea de la serralada Flinders al centre d'Austràlia del Sud. S'ha registrat a 200-600m des del nivell del mar. L'extensió de la presència de l'espècie és d'aproximadament 56.000km2. Aquesta espècie es troba per sota dels còdols i pedres a les vores de rierols pedregosos. Les cries es posen sota les roques a la vora dels rierols. Els capgrossos s'adapten als rierols de corrent ràpid. Pel que sembla, es reprodueixen a la primavera. No hi ha amenaces significatives per a la supervivència d'aquesta espècie. L'espècie es troba en Flinders Ranges National Park.

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Streambank froglet

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The streambank froglet or Flinders Ranges froglet (Crinia riparia) is a small, locally common, Australian ground-dwelling frog, of the family Myobatrachidae.

Description

The streambank froglet is a small frog (2.5 centimetres measured from snout to posterior). The colouring can be red, brown, tan, to drab olive green colour with many shades in between. Like its relatives Crinia signifera, this frog is of extremely variable markings, with great variety usually found within confined populations. The dorsal and ventral surfaces are very variable. The dorsal surface may be smooth or warty. The tympanum of this frog is not visible. The colour under the throat is pale grey, the ventral surface backwards from the front legs is white with granular, mottled black.

Distribution

The streambank froglet is found only in the area around the Flinders Ranges and Gammon Ranges National Parks of central South Australia. It is found most often under rocks in springfed waterholes or cobbled pools in intermittently flowing streambeds.

Ecology and behaviour

Because of the seasonality of the rain, and periodic flooding, the tadpoles of these frogs have sucker mouthparts and a streamlined, flattened profile adapted to hold on to the rocks even in canyons where water can be funneled into flowing very rapidly. The call of the male is a barely audible 'creeeak-crek' described as sounding like a creaking hinge.

The diet of the species consists of small insects, much smaller in comparison to their size to most frogs.

References

  1. ^ Jean-Marc Hero, Peter Robertson, Frank Lemckert (2004). "Crinia riparia". IUCN Red List of Threatened Species. 2004: e.T41140A10405051. doi:10.2305/IUCN.UK.2004.RLTS.T41140A10405051.en.{{cite journal}}: CS1 maint: multiple names: authors list (link)
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Streambank froglet: Brief Summary

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The streambank froglet or Flinders Ranges froglet (Crinia riparia) is a small, locally common, Australian ground-dwelling frog, of the family Myobatrachidae.

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Crinia riparia ( Spanish; Castilian )

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Crinia riparia es una especie de anfibios de la familia Myobatrachidae.

Distribución geográfica

Se encuentra Australia.

Estado de conservación

Se encuentra amenazada de extinción por la pérdida de su hábitat natural

Referencias

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Crinia riparia: Brief Summary ( Spanish; Castilian )

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Crinia riparia es una especie de anfibios de la familia Myobatrachidae.

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Crinia riparia ( Basque )

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Crinia riparia Crinia generoko animalia da. Anfibioen barruko Myobatrachidae familian sailkatuta dago, Anura ordenan.

Erreferentziak

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Crinia riparia: Brief Summary ( Basque )

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Crinia riparia Crinia generoko animalia da. Anfibioen barruko Myobatrachidae familian sailkatuta dago, Anura ordenan.

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Crinia riparia ( French )

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Crinia riparia est une espèce d'amphibiens de la famille des Myobatrachidae[1].

Répartition

Cette espèce est endémique du centre de l'Australie-Méridionale. Elle se rencontre entre 200 et 600 m d'altitude dans la chaîne de Flinders[1],[2].

Description

Crinia riparia mesure jusqu'à 25 mm. La coloration de son dos peut prendre différentes teintes allant du rouge au vert-olive en passant par différents tons de brun. Sa peau peut être lisse ou rugueuse. Son ventre est blanchâtre avec des tachetures noires. Sa gorge est gris pâle.

Publication originale

  • Littlejohn & Martin, 1965 : A new species of Crinia (Anura: Leptodactylidae) from South Australia. Copeia, vol. 1965, p. 319-324.

Notes et références

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Crinia riparia: Brief Summary ( French )

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Crinia riparia est une espèce d'amphibiens de la famille des Myobatrachidae.

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