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Higher TaxaGekkonidae, Gekkota, Sauria, Squamata (lizards: geckos) 
Common NamesSadan cave bent-toed gecko 
SynonymCyrtodactylus sadanensis GRISMER, WOOD JR, THURA, ZIN, QUAH, MURDOCH, GRISMER, LIN, KYAW & LWIN 2017: 83 
DistributionMyanmar (Hpa-an District, Kayin State)

Type locality: Sadan Cave 17 km south-east of Hpa-an, Hpa-an District, Kayin State, Myanmar (N16°44.605, E97°29.493; 26 m in elevation).  
TypesHolotype: LSUHC 12839, Adult male, collected on 5 October 2016 at 1700 h by L. Lee Grismer, Evan S. H. Quah, Perry L. Wood, Jr., Myint Kyaw Thura, Thaw Zin, Matthew L. Murdoch, Marta S. Grismer and Htet Kyaw.
Paratypes: Adult males BYU 52218 and LSUHC 12848, adult females BYU 52216–17, 52219, LSUHC 12841–47, 12849 and 12853 bear the same collection data as the holotype. 
CommentSympatry: The fact that Cyrtodactylus sadanensis sp. nov. is sympatric but not syntopic with C. sinyineensis from Sin Yine Cave is an indication of the degree of niche partitioning that may occur in many of the karst habitats we explored. The hillside walls outside Sadan Cave are continuous with those of Sin Yine Cave and would enable these two species to share the same microhabitat. Yet the larger C. sinyineensis sp. nov. (maximum SVL = 91.6 mm) was only found inside the cave at least 100 m from the opening and the smaller C. sadanensis sp. nov. (maximum SVL = 73.8 mm) was abundant on the karst walls outside the cave. Additionally, these two species do not occur in the same species group, indicating that this karst system has been invaded multiple times. 
EtymologyThe specific epithet, sadanensis, is a noun in apposition in reference to the type locality of Sadan Cave. 
  • GRISMER, L. LEE; PERRY L. WOOD, JR., MYINT KYAW THURA, THAW ZIN, EVAN S. H. QUAH, MATTHEW L. MURDOCH, MARTA S. GRISMER, AUNG LIN, HTET KYAW and NGWE LWIN 2017. Twelve new species of Cyrtodactylus Gray (Squamata: Gekkonidae) from isolated limestone habitats in east- central and southern Myanmar demonstrate high localized diversity and unprecedented microendemism Zoological Journal of the Linnean Society 182: 862-959
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