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Marine Algae of the St. Martin’s Island, Bangladesh. Vi. New Records of Species of the Genus Kallymenia J. Ag. (rhodophyta)

Abdul Aziz
Department of Botany, University of Dhaka, Dhaka 1000, Bangladesh

A.K.M. Nurul Islam
Department of Botany, University of Dhaka, Dhaka 1000, Bangladesh

A. Jahan
Department of Botany, University of Dhaka, Dhaka 1000, Bangladesh

Abstract/ Executive Summary:

Four species of the genus Kallymenia J. Ag. such as K. cribrosa Harvey, K. rosea Womersley & Norris, K. rubra Womersley & Norris K. tasmanica Harvey have been reported for the first time from St. Martin’s Island, Bangladesh.

Keywords: Seaweeds, Marine algae, Kallymenia spp., St. Martin's Is., Bangladesh

Location: St. Martin’s Is., Bangladesh

Start Date: 01-03-1997

End Date: 31-03-1997

Program Area: Conservation and Biodiversity

Commodity: Plant

Objectives:

To determine the Marine Algae of the St. Martin’s Island, Bangladesh. Vi. new Records of Species of the Genus Kallymenia j. Ag. (Rhodophyta)

Methodology:

Red macro-algal genus Kallymenia J. Ag. collected from the St. Martin’s Is., Bangladesh, on examination was found to be composed of four species. Four red macro-algae collected as drifted and or live, two from south-east and two from north-west during fourth week of March 1997 have been studied. The samples were preserved in 5% formalin in the sea water. Harberia were prepared within a few days of collections and photographs were taken.

Source of Information: Bangladesh J. Bot. 37(2): 173-178, 2008 (December)

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Thallus expanded, sub-simple or divided in to broad lobes, without mid-rib or veins, beautifully-membranous, formed internally of three layers: an inner layer of elongated, branched, anastomosing filaments called medulla which is bounded on both sides by a layer of large triangular to polygonal cells called sub-cortex, followed by a dense layer of smaller, rounded to short cylinder chromatophore bearing assimilatory cells to the surface called outer-cortex; sporangia scattered in the cortical layer, tetrapartite, on separate thalli; cystocarps wart-like, sunk in the thallus or projecting as swollen spots, surrounded by rhizoidal outgrowths from the neighbouring cells. Thallus foliose, 30 cm or more high, 50-60 cm wide, pink-red in colour, stipe short which produces as many as five short stalked wide leafy branches; branches delicate and mucilaginous, lobed with uneven and undulate margins; tongue-like propagules arise from the margins of leafy branches; herbarium materials corrugated; thallus 50 - 113 µm thick, cortex 2 layered, compact with spheroidal epidermal or outer cortical cells, 7-17 µm in diam., inner cortical cells spheroidal to triangular; medulla with loosely arranged hyphae-like cells. Cystocarps wart-like, 250 - 300 µm broad, numerous and scattered on both sides of the thallus just below the cortex. Tetraspores not found. Thallus about 35 cm high and wider than the height, large expanded into several broad blades with short stipe, margins moderately wavy, perforations large and few (many for small ones); short adventitious marginal branches common; rosy-red in colour, gelatinous but fairly firm when fresh; cortex consists of 3 - 4 layers of cells, outer two layer of cells cylindric to conical, 10 - 14 µm long, 5 - 7 µm in diam., followed by triangular to polygonal inner cortical cells, 8 - 18 µm broad which perhaps act as the tetrasporangial mother cells, medulla loosely arranged; tetrasporangia scattered among the cortical cells, cruciately divided; tetraspores 13 - 15 µm long.

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