| 词条 | Petropedetes johnstoni |
| 释义 |
| image = | status = NT | status_system = IUCN3.1 | status_ref = [1] | taxon = Petropedetes johnstoni | authority = (Boulenger, 1888) | synonyms = {{species list | Cornufer johnstoni | Boulenger, 1888 "1887" }} | synonyms_ref = [2] }}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][4] Common name Johnston's water frog has been coined for this species.[2] EtymologyThe specific name johnstoni honours Harry Johnston, a British explorer and naturalist[7] who collected the holotype. DescriptionAdult males measure about {{convert|32|mm|in|1|abbr=on}} and adult females about {{convert|38|mm|in|1|abbr=on}} 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.[4] Habitat and conservationPetropedetes 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]References1. ^1 {{cite journal | author = Amiet, J.-L. | title = Petropedetes johnstoni | journal = IUCN Red List of Threatened Species | volume= 2004 | page = e.T58079A11714941 | year = 2004 | url = https://www.iucnredlist.org/species/58079/11714941 | doi = 10.2305/IUCN.UK.2004.RLTS.T58079A11714941.en | accessdate = 18 October 2018}} [2][3][4]2. ^1 {{cite book |last1 = Beolens | first1 = Bo | last2 = Watkins | first2 = Michael | last3 = Grayson | first3 = Michael |last-author-amp=yes |title=The Eponym Dictionary of Amphibians |url=https://books.google.com/books?id=QJY3BAAAQBAJ&pg=PA106 |date=2013 |publisher=Pelagic Publishing |isbn=978-1-907807-42-8 |page=106}} 3. ^1 2 3 {{cite web |url=http://research.amnh.org/vz/herpetology/amphibia/Amphibia/Anura/Petropedetidae/Petropedetes/Petropedetes-johnstoni |title=Petropedetes johnstoni (Boulenger, 1888) |author=Frost, Darrel R. |year=2018 |work=Amphibian Species of the World: an Online Reference. Version 6.0 |publisher=American Museum of Natural History |accessdate=18 October 2018}} 4. ^1 2 {{Cite journal |last=Sánchez-Vialas |first=Alberto |last2=Calvo-Revuelta |first2=Marta |last3=Castroviejo-Fisher |first3=Santiago |last4=De la Riva |first4=Ignacio |last-author-amp=yes |date=2018 |title=The taxonomic status of Petropedetes newtonii (Amphibia, Anura, Petropedetidae) |url=https://zookeys.pensoft.net/articles.php?id=24764 |journal=ZooKeys |volume=765 |pages=59–78 |doi=10.3897/zookeys.765.24764 |pmc=5999683 |pmid=29904270}} }}{{Taxonbar|from=Q2245099}} 7 : Petropedetes|Frogs of Africa|Amphibians of Cameroon|Endemic fauna of Cameroon|Amphibians described in 1888|Taxa named by George Albert Boulenger|Taxonomy articles created by Polbot |
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