Pristimantis aureoventris Kok, Means & Bossuyt, 2011
|Species Description: Kok PJT, Means DB, Bossuyt FY 2011 A new highland species of Pristimantis Jimenez de la Espada, 1871 (Anura: Strabomantidae) from the Pantepui region, northern South America. Zootaxa 2934: 1-19.|
This species can be distinguished from 21 other species in the genus Pristimantis that are found in the Pantepui region by the following characteristics: finger I is shorter than finger II, presence of a visible tympanum, lack of vocal slits, presence of fringes on fingers and toes, presence of nuptial pads in males, and smaller adult female size. This species is additionally differentiated from the closest geographically located species in this genus, P. yuruaniensis, because it possesses much more polymorphism in color and pattern and its internal organs are significantly less visible from its ventral side (Kok et al. 2011).
In life, dorsal skin varies from golden brown to dark brown. A W-shaped mark may appear on the shoulder blade. The snout may be lighter in color than the body but contains dark markings. Several specimens had a postocular stripe dark that runs along the tympanum. Some specimens possess two light brown stripes running down the back with dark brown spots and outlined in a thin eggshell-colored line. Similar bands that range from light grayish brown to dark brown were present on some specimens, but not all. Often the flanks are characterized by light brown and dark brown bands with similar but faint cross bands on the legs. The ventrum is golden yellow in color with reddish-brown or dark brown mottling. The skin is slightly translucent to opaque, but the internal organs are barely visible. The arms and legs are reddish-orangish brown and the groin is black or brown. Individuals may also possess a red-orange flash mark in the groin area directly in front of the hind legs and the groin may possess golden spots. Preservation led to the darkening of pigment and fading of patterns in all specimens. The orange-flash mark found on a male’s flank turned white after preservation (Kok et al. 2011).
Variation in coloration and pattern make up the majority of intraspecific variation. Sexual dimorphism is limited; females are larger than males and males posess two nuptial pads that are whitish in color and lack spines (Kok et al. 2011).
Distribution and Habitat
Country distribution from AmphibiaWeb's database: Brazil, Guyana, Venezuela
Life History, Abundance, Activity, and Special Behaviors
Males call at night from concealed locations in the lower leaves of Orectanthe sceptrum. Calls consist of a single note with a duration of 0.017 - 0.023 s and a rate of approximately 18 calls per minute. The fundamental frequency of the call ranges from 2180 - 2430 Hz and the inter-call interval is 2.73 - 3.51 s. The call has three harmonics, with the third containing more sound energy than the second. To the human ear, the call resembles a droplet falling into water (Kok et al. 2011).
Clutches of 4 - 5 eggs were found in early November in the crevices of dead marsh pitcher plants, Heliamphora nutans. They ranged in size from 5.25 - 6.1 mm and were yellow in color with a translucent membrane (Kok et al. 2011).
Similar to other frogs in this genus, this species exhibits direct development (Kok et al. 2011).
Trends and Threats
Possible reasons for amphibian decline
Climate change, increased UVB or increased sensitivity to it, etc.
Pristimantis aureoventris was assigned to the genus based on preliminary molecular phylogenetic information. However, the phylogenies were not published with the species description (Kok et al. 2011). The closest geographical Pristimantis species, P. yuruaniensis, which is also found on the Kukenán Tepui, was identified as the closest related species to P. aureoventris (Jablonski et al. 2017).
The species epithet, “aureoventris” is a Latin reference to their golden ventral face with “aureus” meaning “golden” and “ventris” meaning “venter” (Kok et al. 2017).
IUCN SSC Amphibian Specialist Group. (2021). "Pristimantis aureoventris." The IUCN Red List of Threatened Species 2021: e.T46086220A86255408. https://dx.doi.org/10.2305/IUCN.UK.2021-1.RLTS.T46086220A86255408.en
Jablonski, D., Grula, D., Barrio-Amoros, C., Kok, P. (2017). "Molecular phylogenetic relationships among Pristimantis summit populations in the eastern tepui chain: insights from P. aureoventris (Anura: Craugastoridae)." Salamandra 53(3): 473-478. [link]
Kok, P. J. R., Means, D. B., Bossuyt, F. (2011). "A new highland species of Pristimantis Jiménez de la Espada, 1871 (Anura: Strabomantidae) from the Pantepui region, Northern South America." Zootaxa 2934(1): 1-19. [link]
Originally submitted by: Julianna Porter, Kerill Moseychuk (2022-07-29)
Description by: Julianna Porter, Kerill Moseychuk (updated 2022-07-29)
Distribution by: Julianna Porter, Kerill Moseychuk (updated 2022-07-29)
Life history by: Julianna Porter, Kerill Moseychuk (updated 2022-07-29)
Trends and threats by: Julianna Porter, Kerill Moseychuk (updated 2022-07-29)
Comments by: Julianna Porter, Kerill Moseychuk (updated 2022-07-29)
Edited by: Ann T. Chang (2022-07-29)
Species Account Citation: AmphibiaWeb 2022 Pristimantis aureoventris <https://amphibiaweb.org/species/7693> University of California, Berkeley, CA, USA. Accessed Feb 6, 2023.
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Citation: AmphibiaWeb. 2023. <https://amphibiaweb.org> University of California, Berkeley, CA, USA. Accessed 6 Feb 2023.
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