The four-digit toad or dwarf toad (Didynamipus sjostedti) is a species of toad in the family Bufonidae.[1][3][4][5] It is found in Bioko (Equatorial Guinea), southwestern Cameroon, and southeastern Nigeria.[1][3] It is the only species in the genus Didynamipus.[4][6]
Didynamipus sjostedti are very small toads: males grow to 16 mm (0.6 in) and females to 19 mm (0.7 in) in snout–vent length. The snout is sharp in males but rounded in females; males also have a ridge on the top the snout that gives it an upturned appearance. The tympanum is absent. The hands and feet are reduced, with the two outer fingers and toes and the innermost toes present only as tubercles. No webbing is present. The dorsum is brown with lighter and darker mottling.[5]
Habitat and conservationedit
Didynamipus sjostedti occur on forest edges and in clearings in moist forest at elevations of 200–1,200 m (660–3,940 ft) above sea level, often in mixed-sex and mixed-lifestage aggregations. They can occur both in leaf litter and perched atop low vegetation. Individuals found near terretrial egg masses suggest terrestrial breeding and direct development[1] (i.e., there is no free-living larval stage[8]).
This species appears to tolerate some habitat modification and has also been found in secondary forest and farmland, although it is still considered threatened by habitat loss primarily caused by agricultural expansion. It is known from inside or near several protected areas.[1]
Referencesedit
^ abcdeIUCN SSC Amphibian Specialist Group (2017). "Didynamipus sjostedti". IUCN Red List of Threatened Species. 2017: e.T54811A16272990. doi:10.2305/IUCN.UK.2017-2.RLTS.T54811A16272990.en. Retrieved 2 September 2022.
^ abcAndersson, L. G. (1903). "Neue Batrachier aus Kamerun, von den Herren Dr. Y. Sjöstedt und Dr. R. Jungner gesammelt". Verhandlungen der kaiserlich-königlichen zoologisch-botanischen Gesellschaft in Wien. 53: 141–145.
^ abcFrost, Darrel R. (2022). "Didynamipus sjostedti Andersson, 1903". Amphibian Species of the World: An Online Reference. Version 6.1. American Museum of Natural History. doi:10.5531/db.vz.0001. Retrieved 2 September 2022.
^ ab"Bufonidae". AmphibiaWeb. University of California, Berkeley. 2022. Retrieved 2 September 2022.
^ abChanning, Allan & Rödel, Mark-Oliver (2019). Field Guide to the Frogs & other Amphibians of Africa. Cape Town: Struik Nature. p. 94. ISBN978-1-77584-512-6.
^Frost, Darrel R. (2022). "Didynamipus Andersson, 1903". Amphibian Species of the World: An Online Reference. Version 6.1. American Museum of Natural History. doi:10.5531/db.vz.0001. Retrieved 2 September 2022.
^Beolens, Bo; Watkins, Michael & Grayson, Michael (2013). The Eponym Dictionary of Amphibians. Pelagic Publishing. p. 199. ISBN978-1-907807-42-8.
^Vitt, Laurie J. & Caldwell, Janalee P. (2014). Herpetology: An Introductory Biology of Amphibians and Reptiles (4th ed.). Academic Press. p. 166.
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March 01, 2024
four, digit, toad, four, digit, toad, dwarf, toad, didynamipus, sjostedti, species, toad, family, bufonidae, found, bioko, equatorial, guinea, southwestern, cameroon, southeastern, nigeria, only, species, genus, didynamipus, conservation, statusvulnerable, iuc. The four digit toad or dwarf toad Didynamipus sjostedti is a species of toad in the family Bufonidae 1 3 4 5 It is found in Bioko Equatorial Guinea southwestern Cameroon and southeastern Nigeria 1 3 It is the only species in the genus Didynamipus 4 6 Four digit toadConservation statusVulnerable IUCN 3 1 1 Scientific classificationDomain EukaryotaKingdom AnimaliaPhylum ChordataClass AmphibiaOrder AnuraFamily BufonidaeGenus DidynamipusAndersson 1903 2 Species D sjostedtiBinomial nameDidynamipus sjostedtiAndersson 1903 2 Synonyms 3 Didynamipus sjostedti Andersson 1903 Atelophryne minutus Boulenger 1906 1905 Contents 1 Etymology 2 Description 3 Habitat and conservation 4 ReferencesEtymology editThe specific name sjostedti honours Bror Yngve Sjostedt a Swedish entomologist and ornithologist 7 who collected the type series 2 Description editDidynamipus sjostedti are very small toads males grow to 16 mm 0 6 in and females to 19 mm 0 7 in in snout vent length The snout is sharp in males but rounded in females males also have a ridge on the top the snout that gives it an upturned appearance The tympanum is absent The hands and feet are reduced with the two outer fingers and toes and the innermost toes present only as tubercles No webbing is present The dorsum is brown with lighter and darker mottling 5 Habitat and conservation editDidynamipus sjostedti occur on forest edges and in clearings in moist forest at elevations of 200 1 200 m 660 3 940 ft above sea level often in mixed sex and mixed lifestage aggregations They can occur both in leaf litter and perched atop low vegetation Individuals found near terretrial egg masses suggest terrestrial breeding and direct development 1 i e there is no free living larval stage 8 This species appears to tolerate some habitat modification and has also been found in secondary forest and farmland although it is still considered threatened by habitat loss primarily caused by agricultural expansion It is known from inside or near several protected areas 1 References edit a b c d e IUCN SSC Amphibian Specialist Group 2017 Didynamipus sjostedti IUCN Red List of Threatened Species 2017 e T54811A16272990 doi 10 2305 IUCN UK 2017 2 RLTS T54811A16272990 en Retrieved 2 September 2022 a b c Andersson L G 1903 Neue Batrachier aus Kamerun von den Herren Dr Y Sjostedt und Dr R Jungner gesammelt Verhandlungen der kaiserlich koniglichen zoologisch botanischen Gesellschaft in Wien 53 141 145 a b c Frost Darrel R 2022 Didynamipus sjostedti Andersson 1903 Amphibian Species of the World An Online Reference Version 6 1 American Museum of Natural History doi 10 5531 db vz 0001 Retrieved 2 September 2022 a b Bufonidae AmphibiaWeb University of California Berkeley 2022 Retrieved 2 September 2022 a b Channing Allan amp Rodel Mark Oliver 2019 Field Guide to the Frogs amp other Amphibians of Africa Cape Town Struik Nature p 94 ISBN 978 1 77584 512 6 Frost Darrel R 2022 Didynamipus Andersson 1903 Amphibian Species of the World An Online Reference Version 6 1 American Museum of Natural History doi 10 5531 db vz 0001 Retrieved 2 September 2022 Beolens Bo Watkins Michael amp Grayson Michael 2013 The Eponym Dictionary of Amphibians Pelagic Publishing p 199 ISBN 978 1 907807 42 8 Vitt Laurie J amp Caldwell Janalee P 2014 Herpetology An Introductory Biology of Amphibians and Reptiles 4th ed Academic Press p 166 nbsp Wikimedia Commons has media related to Didynamipus sjostedti Retrieved from https en wikipedia org w index php title Four digit toad amp oldid 1163214244, wikipedia, wiki, book, books, library,
