Bibliographic Detail

Tseng, C.K., Dong, M. & Lu, B., 2004

Reference:
Tseng, C.K., Dong, M. & Lu, B. (2004). New species and records of the genus Avrainvillea (Udoteaceae, Chlorophyta) from South China Sea. Studia Marina Sinica 46: .

Abstract:
This paper reports four species including a new species, Avrainvillea xishaensis Tseng, Dong et Lu sp. nov. are recorded for the first time from China.The new species is Avrainvillea xishaensis Tseng, Dong et Lu sp. nov.(Fig.4, P1.1:4). Frond dark brown, about 9 cm tall, holdfast cylindrical, 3 cm long,1.4 cm in diameter, several flabella arising from the holdfast, lateral flabellum adhering to each other below the middle part, usually vertically splitting to the middle part, forming lobes, slightly denticular at the apices, zonate on the surface and lacking stipe. Filaments of flabellum dichotomously branched, and constrictions above the forks, sometimes secondary constriction also present, Cortical filament tapering in surface, with pseudocortex, clavate at the apex, cortical filaments of the lower part of the flabellum irregularly torulose, sometimes cylindrical, 17-30m in diameter, but near the surface, thin, 7-20m in diameter; cortical filament of the middle part of the flabellum cylindrical, sometimes torulose,13-25m in diameter, but near the surface, thin, 7-16m in diameter; cortical filament of the upper part of the flabellum cylindrical, 10-20m in diameter, but near the surface, thin, usually torulose, 5-13m in diameter.Habitat: On corallite in the subtidal region.Holotype: AST 75-0975, collected by Lu Baoren, on April 23,1975, at Jinqingdao, Xisha Islands.The present species is mainly characterized by its flabellum vertically splitting to the middle, part, forming many lobes; its apices slightly denticular, zonate on the surface, and filaments tapering in surface, clavate in apex, with pseudocortex and without stipe. It is closely related to Avrainvillea obscura (C. Agardh) J. Agardh but differing in its apices being slightly denticular, and zonate on the surface, and with pseudocortex. Three other species are newly recorded for the first time from China, Avrainvillea amadelpha (Mont.) A. Gepp et E.S.Gepp, A. hollenbergii Trono and A. obscura (C. Agardh) J. Agardh.