碩士 / 國立臺灣海洋大學 / 海洋生物研究所 / 102 / Halymenia is one of the large marine red algal genera and is widely distributed in subtidal zones of the tropical, subtropical and temperate regions; it distribution widely in Taiwan and occurs throughout the year, but western coast is more scarce. The genus comprises about 69 species around the world. Based on the thallus morphology, this genus can be grouped into two types: Feathery-type and Prostrate -type. The generic morphology include mostly dark red, soft slimy, with a discoid holdfast. Previous studies on the taxonomy of Halymenia from Taiwan were mainly focused on morphological observations and cause to some taxonomic confusion and synonymy. In this study, the taxonomy of Halymenia is revised based on comparative anatomy, inter- specific relationships inferred using rbcL sequence analyses, and description of the auxiliary cell ampullae. The molecular analyses showed that there are four species identified: 1）Halymenia durvillei, a previously recorded species in Taiwan; 2）Halymenia tondoana, a new record in Taiwan; 3）Halymenia“dilatata-1＂and 4） Halymenia“dilatata-2＂, two new species. The four Halymenia species are easily mistaken for known species, because these Halymenia have similar gross morphological, but the use of molecular and morphology characteristics can successfully distinguish these algal species.Base on the morphology and molecular phylogenetic analyse of the four Halymenia species：1）H.durvillei and H. tondoana both are the Feathery-type, with similar morphology features, but the blade and stipe are different. H.durvillei expressed diverse morphology due to environmental manual exerted in the geography of the habitat. In this study, we investigated Halymenia durvillei collection from four areas (Taiwan northeastern, southern, Orchid Island, Green Island). Molecular sequence analysis suggested that the H. ceylanica, H. formosa, H. floresia, H. microcarpa, previously recorded in Taiwan are H. durvillei; 2）Both H.“dilatata-1＂ and H.“dilatata-2＂belong to the Prostrate-type, the two algal species are different in morphology, H.“dilatata-1＂ is bigger, soft slimy, margin lacerate, stipes more conspicuous than H.“dilatata-2＂. In the past, the occurring of the Prostrate-type only H.“dilatata＂in Taiwan, and similar of describes with H.“dilatata-1＂, but can not found the same sequence when use molecular compare other country species, if want to make sure, we need to compare a lot more other place with Halymenia. 3）Molecular phylogenetic analysis of the study showed that Halymenia is polyphyletic. more genes are required to define the Halymenia group in the future.
| Identifer | oai:union.ndltd.org:TW/102NTOU5270005 |
| Date | January 2014 |
| Creators | Lin, Wen-Chien, 林文謙 |
| Contributors | Lin Showe-Mei, 林綉美 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 116 |
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