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Rediscovery and Range Extension of the Malatgan River Caecilian (Ichthyophis Weberi Taylor, 1920) in Palawan, Philippines

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Beijnen, J.V. and Jose, E.D., 2021. Rediscovery and Range Extension of the Malatgan River Caecilian (Ichthyophis Weberi Taylor, 1920) in Palawan, Philippines. United International Journal for Research & Technology (UIJRT), 2(11), pp.87-90.


A herpetological survey was undertaken in the Cleopatra’s Needle Mountain Range in Palawan, Philippines, on December 3-12, 2015 organized by the Center for Sustainability – a non-government, non-profit environmental organization in Palawan. The survey aimed to gather initial data on wildlife, including reptiles and amphibian populations from this biogeographically distinct region as supplementary requirements for its declaration as an officially protected area. The survey led to the rediscovery of Malatgan River Caecilian (Ichthyophis Weberi Taylor, 1920) in Palawan, Philippines – an elusive caecilian that has not been observed since 1961. We described here several aspects of the biogeography of the species in Palawan biogeographic region, Philippines.

Keywords: River Caecilian, Palawan, Amphibians, Palawan, Ichthotophis Webri Taylor.


  1. Beijnen, van, J. & Jose, E.D. (2020). Notes on the Rediscovery and Range Extension of the Palawan Wolf Gecko (Luperosaurus palawanensis, Brown and Alcala, 1978) in Palawan, Philippines. International Journal of Innovative Science and Research Technology. Volume 5, Issue 3, March – 2020. ISSN No: -2456-2165.
  2. Brown, R. M. & Iskandar, D. T.  (2000).  Nest site selection, larval hatching, and advertisement calls of Rana arathooni (Amphibia; Anura; Ranidae) from southwestern Sulawesi (Celebes) Island, Indonesia.  Journal of Herpetology 34: 404–413.
  3. Diesmos, A. C., Watters, J. L., Huron, N. A., Davis, D. R., Alcala, A. C., Crombie, R. I., Afuang, L. E., Gee-Das, G., Sison, R. V., Sanguila, M. B., Penrod, M. L., Labonte, M. J., Davey, C. S., Leone, E. A., Diesmos, M. L., Sy, E. Y., Welton, L. J., Brown, R. M. & Siler, C. D. (2015). Amphibians of the Philippines, part I: checklist of the species. Proceedings of the California Academy of Sciences 62: 451–531.
  4. Diesmos, A. C., Alcala, A. C., Siler, C. D. & Brown, R. M. (2014). Status and Conservation of Philippine Amphibians.  Conservation Biology of Amphibians of Asia, Status of Conservation and Decline of Amphibians: Eastern Hemisphere. 19: 310-336.
  5. Diesmos, A. C. (2012). The Status status of Philippine Caecilians (Amphibia: Ichthyophiidae).  FrogLog. 20:104: 46-47.
  6. Eekhout, X. (2010). Sampling amphibians and reptiles. Volume 8 – Manual on field recording techniques and protocols for all taxa biodiversity inventories, 530–557.
  7. Hoevenaars K. & van, Beijnen, J. (2013). The proposed Cleopatra’s Needle Forest Reserve, Palawan, Philippines – version 2015. Centre for Sustainability.
  8. Institute for Biodiversity Science & Sustainability, California Academy of Sciences (http://researcharchive.calacademy.org)
  9. (2012). IUCN Red List Categories and Criteria: Version 3.1. Second edition. Gland, Switzerland and Cambridge, UK: IUCN. iv + 32pp.
  10. Jose E.D. & van, Beijnen, J. (2017) Notes on the forest frogs of Cleopatra’s Needle Mountain Range, with special reference to the newly defined and expanded geographical range of Pelophryne albotaeniata (Barbour, 1938): fuel for the conservation of the forests of northern Palawan Island, Philippines. Journal of Natural History – National Museum of the Philippines 2: 33–37.
  11. Nishikawa, K., Matsui, M., Yong, H. S., Ahmad, N., Yambun, P., Belabut, D. M., Sudin, A., Hamidy, A., Orlov, N. L., Ota, H., Yoshikawa, N., Tominaga, A. & Shimada, T. (2012). Molecular Phylogeny and Biogeography of caecilians from Southeast Asia (Amphibia, Gymnophiona, Ichthyophiidae), with Special Reference to High Cryptic Species Diversity in Sundaland. Molecular Phylogenetics and Evolution. 63:3; 714-723.
  12. (2015). State of the Environment 2015 Updates, Province of Palawan, Philippines. Palawan Council for Sustainable Development. Puerto Princesa City, Palawan, Philippines. 76pp.
  13. Siler, C. D., Welton, L. J., Siler, J. M., Brown, J., Bucol, A., Diesmos, A. C. & Brown, R. M. (2011).  Amphibians and Reptiles, Luzon Island, Aurora Province and Aurora Memorial National Park, Northern Philippines: New island distribution records.  Check List 7: 182–195.
  14. Siler, C. D., Oaks, J. R., Welton, L. J., Linkem, C. W., Swab, J., Diesmos, A. C. & Brown, R. M.  (2012).  Did geckos ride the Palawan raft to the Philippines?  Journal of Biogeography 39: 1217–1234.
  15. Supsup, C.E. & Carestia, Jr., U.V. (2020) Rediscovery, new island record, and clarification of the geographic distribution of Oligodon perkinsi (Taylor, 1925) (Squamata, Colubridae), a poorly known endemic snake from the Palawan faunal region of western Philippines. Check List 16(4): 877–881.
  16. Taylor, E. H.  (1920). Taylor: Philippine Amphibia Phil. Jour. Sci., 16: 227-228.
  17. Taylor, E. H.  (1923). Amphibians. Phil. Jour. Sci., 22: 516-517.
  18. Taylor, E. H. (19687). The Caecilians of the World- A Taxonomic Review. Lawrence: University. of Kansas Press, Lawrence, Kansas. 848 pp. 181–187.

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