A new shallow-water species, Polycyathus chaishanensis sp nov (Scleractinia: Caryophylliidae), from Chaishan, Kaohsiung, Taiwan

Lin, Mei-Fang, Kitahara, Marcelo V., Tachikawa, Hiroyuki, Keshavmurthy, Shashank, and Chen, Chaolun Allen (2012) A new shallow-water species, Polycyathus chaishanensis sp nov (Scleractinia: Caryophylliidae), from Chaishan, Kaohsiung, Taiwan. Zoological Studies, 51 (2). pp. 213-221.

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Abstract

A small population of a new species of zooxanthellate scleractinian coral, Polycyathus chaishanensis sp. nov., is described from shallow water (< 3 m) off Chiashan, Kaohsiung, an uplifted Pleistocene reef located on the southwest coast of Taiwan. Polycyathus chaishanensis sp. nov. is a zooxanthellate coral associated with Symbiodinium Cl and forms small encrusting colonies. Polycyathus chaishanensis sp. nov. differs from other Polycyathus by having (1) the smallest corallites (2.0-3.7 mm in calicular diameter) reported in the genus Polycyathus; (2) septa hexamerally arranged in 4 incomplete cycles displaying dentate or laciniate axial edges; (3) crispate and well-developed pali before the secondary septa; and (4) light brown pigmented pali/columellar elements. When expanded, vivid-red to brown polyps rise considerably above the calice, and long and slender tentacles are covered with white nematocyst batteries. Polycyathus chaishanensis is the only species of Polycyathus known from Taiwanese waters and appears to be endemic to a small region at Chaishan. The small population of this new species raises concerns as to its vulnerability to natural and anthropogenic threats.

Item ID: 22645
Item Type: Article (Refereed Research - C1)
Keywords: scleractinia, Polycyathus chaishanensis, zooxanthellae, Chaishan, shallow water
ISSN: 1021-5506
Funders: Biodiversity Research Center, Academia Sinica (BRCAS), National Science Council, Taiwan
Projects and Grants: (NSC94-2621-B-001-005)
Date Deposited: 01 Aug 2012 09:21
FoR Codes: 06 BIOLOGICAL SCIENCES > 0603 Evolutionary Biology > 060309 Phylogeny and Comparative Analysis @ 50%
06 BIOLOGICAL SCIENCES > 0608 Zoology > 060808 Invertebrate Biology @ 50%
SEO Codes: 96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960808 Marine Flora, Fauna and Biodiversity @ 100%
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