Abstract
Gracilaria tenuistipitata var. liui Zhang et Xia 1988 from sand-flat at Nuniachara, Cox’s Bazar, Ulva linza Lin. from west coast of Naf R. at Noapara, Teknaf and Fishary Ghat in River Bakkhali, at Cox’s Bazar, and Caulerpa fergusonii Murray from St. Martin’s Island (SMI), have been newly recorded and illustrated from Bangladesh. C. chemnitzschi (Esper) Weber-van Bosse var. irregulare Aziz & Alfasane var. nov. and C. sertularioides (S.G. Gmelin) M. Howe var. robusta Aziz & Alfasane var. nov. from SMI, Cox’s Bazar District, Bangladesh are new to science. Total number of marine algal taxa so far recorded from Bangladesh coasts is now 210.
 Bangladesh J. Plant Taxon. 27(2): 335-343, 2020 (December)
Highlights
In the last quarter of 20th century significant contributions have been made on the seaweed flora of the Indian subcontinent and adjacent regions
Islam adding 65 seaweed taxa including sub-littoral seaweeds collected with the help of Bangladesh Navy in 2013 till 2015 making the total number of taxa 205 along Bangladesh coasts mainly St. Martin’s Island (SMI) (Aziz, 2015)
Billah et al (2018) investigated relative abundance of 11 greens, 14 browns and 12 red sub-littoral seaweeds collected from January to June in 2007 (but five seaweeds reported as new records were all reported earlier by Islam (1976) and Aziz et al (2015)
Summary
In the last quarter of 20th century significant contributions have been made on the seaweed flora of the Indian subcontinent and adjacent regions. Ulva linza Lin.: (a) Leafy plants on upper littoral clayey sandy soil, Noapara, during lowest tide; (b) Plants of different ages on a brick surface, 0.4× Bakkhali R.; (c) A bunch of 8 thalli from the brick surface spread on herbarium sheet (scale in mm); (d) Three plants aggregated and attached by haptera (arrow) in culture; inset showing numerous haptera at the base; (e) Herbarium of a mature plant with decomposed upper part producing spores, four young plants developed at the base, 1.5×; (f) Fully developed slender fronds inflated with ruffled edges from old laboratory cultures spread on a Petri dish immersed in culture medium, 1.5× (Figs 2d-f, after PCR, 2019).
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