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• W775509745 abstract "Studies on crustose brown algae are relatively few despite a long history of studiesconducted since the 1800s, with temperate species forming the bulk of these studies.There is a need for more focus on crustose brown algae particularly in the tropics asthey are generally different from those in the temperate regions. These algae receivedlittle attention due to their simple appearance (brownish-black spots on rocks) and lackof apparent economic value despite some being the dominant flora of certain habitats.Taxonomic confusion arising from morphological simplicity largely dependent on thereproductive structures and overlap in morpho-anatomical features among speciesnecessitates the use of molecular approach. This study aims to enhance ourunderstanding of the taxonomy and phylogeny of these understudied algae in Malaysiaand Lombok Island by combining morpho-anatomical observations and molecularsequence data [plastid rubisco large subunit (rbcL) and partial mitochondrialcytochrome c oxidase subunit 1 (cox1-5’) gene sequences]. Key diagnosticmorphological characters for identification include relative thickness of the crust,assembly of erect filaments, number of chloroplast(s) and most importantly theorganisation of reproductive structures. Results indicated that the common crustosebrown algae in Malaysia and Lombok Island are species of Mesospora, Diplura andNeoralfsia expansa. Seven species of Mesospora were identified in the present study ofwhich three were formally described (M. schmidtii, M. negrosensis and M. elongata)and four are putative new species to be described (Mesospora sp. C, Mesospora sp. D,Mesospora sp. 1 and Mesospora sp. 2). Partial output from this study leads to the recentdescription of Mesospora elongata Poong, Lim & Phang from Japan and LombokIsland and a new record of M. negrosensis for Malaysia. The presence of M. elongata inMalaysia is reported here for the first time since the initial publication of this taxon.ivMesospora sp. C and M. schmidtii were reported earlier in Malaysia. This study alsomarks the first report of Mesospora sp. D (previously reported in Japan) and fourputative species of Diplura for Malaysia and Indonesia. The taxon provisionally named“Mesospora” sp. 3 and the closely related Mesospora sp. G are likely members of a newgenus. Other crustose brown algae examined in this study include a Ralfsia-like speciesand two yet-to-be identified taxa. The crustose brown algae are polyphyletic and occurin widely divergent clades among the brown algae with the majority placed in Ralfsialeswhile the rest are closely associated with other phaeophyceaen orders such asSphacelariales and Ishigeales. Circumscription of Ralfsiales comprises the Ralfsiaceae,Neoralfsiaceae, Mesosporaceae and a possible new family to accommodate“Mesospora” sp. 3. Establishment of a new family for members of the genus Diplura isunderway pending the collection of the generitype, Diplura simulans. Molecularanalyses incorporating Hapalospongidion saxigenum indicate that Mesospora, currentlysynonymised with Hapalospongidion should be retained as a separate genus. The rbcLmarker performed better in the elucidation of phylogeny at higher classification levels,whereas cox1-5’ is more suited as a barcoding marker for species level identification ofthe crustose brown algae." @default.
• W775509745 created "2016-06-24" @default.
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• W775509745 date "2014-01-01" @default.
• W775509745 modified "2023-09-23" @default.
• W775509745 title "Taxonomy and phylogeny of crustose brown algae (Phaeophyceae) from Malaysia and Lombok Island, Indonesia/ Poong Sze Wan" @default.
• W775509745 hasPublicationYear "2014" @default.
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