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Fig. 2 | Helgoland Marine Research

Fig. 2

From: Range extension and morphological characterization of rhodolith-forming species (Corallinales, Rhodophyta) from shallow water in the Mexican South Pacific

Fig. 2

Lithothamnion muelleri. Vegetative morphology and anatomy (longitudinal sections: bi). a Fructicose growth form. b Flared epithallial cells (arrow) and subepithallial initials cells (double arrow). c Perithallial filaments with cell fusions between cells of adjacent filaments (arrow). d Multiporate tetrasporangial conceptacle roof shows a densely stained pore plug (arrow). e Pore canals (double arrow), note that roof cells adjacent to pore canals are similar in size and shape to other roof cells (arrow). f Zonated tetrasporangium. g Multiporate tetrasporangial conceptacle with zonated tetraspores (arrow). h Multiporate tetrasporangial conceptacle (arrow) is raised in relation to the surrounding vegetative thallus surface. i Senescent conceptacle in the central region of the thallus (arrow)

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