Grandisonia sechellensis (Boulenger, 1911)
Approximately 190 mm in length; tentacle below and anterior to eye, near lip; eyes in socket visible through skin; tentacle twice as far from the nostrils as from eyes; sutural contact between squamosal and parietal; large choanae; narial plugs on tongue; first collar is distinct with an indistinct transverse dorsal groove and none on the ventral surface; 82 primaries and 74 secondaries with a short unsegmented caudal-most region; dorsally, color is black-brown and the ventral surface is more light brown; a light brown spot surrounds each eye, tentacle, nostril, and vent (modified from Talyor 1968).
Distribution and Habitat
Country distribution from AmphibiaWeb's database: Seychelles
Typically all Grandisonia species are fossorial and can be found under leaves, stones, decaying wood, and in wet soil. G. sechellensis is known from 80 m above sea-level to at least 390 m. Distribution is thought to be limited to the availability of moist habitat rather than elevation.
Life History, Abundance, Activity, and Special Behaviors
All species of Grandisonia are believed to be oviparous. It has been reported that G. sechellensis has a larval stage.
Trends and Threats
Possible reasons for amphibian decline
General habitat alteration and loss
Nussbaum, R. A. (1984). ''Amphibians of the Seychelles.'' Biogeography and Ecology of the Seychelles Islands. D.R. Stoddart , eds., Dr. W. Junk Publishers, Boston, 379-415.
Taylor, E.H. (1968). The Caecilians of the World. A Taxonomic Review. University of Kansas Press, Lawrence, Kansas.
Wake, M.H. (1977). ''The reproductive biology of caecilians: an evolutionary perspective.'' Reproductive Biology of Amphibians. D.H. Taylor and S.I. Guttman, eds., Plenum Press, New York., 73-101.
Originally submitted by: David C. Blackburn (first posted 2002-11-13)
Description by: Michelle S. Koo (updated 2021-03-17)
Distribution by: Michelle S. Koo (updated 2021-03-17)
Edited by: Meredith Mahoney (2021-03-17)
Species Account Citation: AmphibiaWeb 2021 Grandisonia sechellensis <https://amphibiaweb.org/species/1893> University of California, Berkeley, CA, USA. Accessed Nov 30, 2022.
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Citation: AmphibiaWeb. 2022. <https://amphibiaweb.org> University of California, Berkeley, CA, USA. Accessed 30 Nov 2022.
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