Petropedetes johnstoni

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Petropedetes johnstoni
Petropedetes johnstoni (10.3897-zookeys.765.24764) Figure 1.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Amphibia
Order: Anura
Family: Petropedetidae
Genus: Petropedetes
Species:
P. johnstoni
Binomial name
Petropedetes johnstoni
(Boulenger, 1888)
Synonyms [2]
  • Cornufer johnstoni Boulenger, 1888 "1887"

Petropedetes johnstoni is a species of frog in the family Petropedetidae. It is endemic to coastal Cameroon and known with certainty only from few localities. For a period, Petropedetes newtonii was considered a junior synonym of this species, leading to a much broader distribution. The two species are now considered distinct, but information on Petropedetes johnstoni sensu stricto is limited. [2] [3] Common name Johnston's water frog has been coined for this species. [2] [4]

Contents

Etymology

The specific name johnstoni honours Harry Johnston, a British explorer and naturalist [5] who collected the holotype. [4]

Description

Adult males measure about 32 mm (1.3 in) and adult females about 38 mm (1.5 in) in snout–vent length. The snout is slightly rounded. The tympanum is distinct, smaller than the eye in the male; the supratympanic fold is distinct. The finger and the toe tips are expanded into discs; the fingers have no webbing whereas the toes may have rudimentary webbing. Dorsal skin bears only relatively small warts. The male lacks the hypertrophied forearm and the keratinised spicules on the skin of the throat and on the basis of the arms seen in Petropedetes newtonii. [3]

Habitat and conservation

Petropedetes johnstoni, as the species was circumscribed in 2004, occurs in lowland forest and mangrove forests. Males can call in forest far from water, and it appears that this species does not depend on water for its reproduction; the larvae are presumably terrestrial. Males guard a nest of eggs on large leaves slightly above the ground. At the time, loss of its forest habitat due to agricultural development, logging and expanding human settlements was considered as the major threat. It was present in the Korup National Park. [1]

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References

  1. 1 2 IUCN SSC Amphibian Specialist Group (2020). "Petropedetes johnstoni". IUCN Red List of Threatened Species . 2020: e.T58079A3065109. doi: 10.2305/IUCN.UK.2020-3.RLTS.T58079A3065109.en . Retrieved 16 November 2021.
  2. 1 2 3 Frost, Darrel R. (2018). "Petropedetes johnstoni (Boulenger, 1888)". Amphibian Species of the World: an Online Reference. Version 6.0. American Museum of Natural History. Retrieved 18 October 2018.
  3. 1 2 Sánchez-Vialas, Alberto; Calvo-Revuelta, Marta; Castroviejo-Fisher, Santiago & De la Riva, Ignacio (2018). "The taxonomic status of Petropedetes newtonii (Amphibia, Anura, Petropedetidae)". ZooKeys (765): 59–78. doi: 10.3897/zookeys.765.24764 . PMC   5999683 . PMID   29904270.
  4. 1 2 "Petropedetes johnstoni (Boulenger, 1888 "1887")". African Amphibians. Retrieved 18 October 2018.
  5. ↑ Beolens, Bo; Watkins, Michael & Grayson, Michael (2013). The Eponym Dictionary of Amphibians. Pelagic Publishing. p. 106. ISBN   978-1-907807-42-8.
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