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Botanical Studies
Figure 10 | Botanical Studies

Figure 10

From: Conspecificity of two morphologically distinct calcified red algae from the northwest Pacific Ocean: Galaxaura pacifica and G. filamentosa (Galaxauraceae, Rhodophyta)

Figure 10

Developmental sequence of the male structure of Galaxaura pacifica Tanaka from Small Port, KNP, southern Taiwan. (A) Young spermatangial branch (spb) replaces one of the dichotomous vegetative cortical (co) branches bearing few primary spermatangial filaments (arrows); (B) Young primary spermatangial filaments further bearing several spermatangial filaments (arrows) at early stage of the spermatangial development; (C) Highly branched spermatangial filaments (arrows) produced from the spermatangial branch (spb) at a younger stage of spermatangial development; (D) Numerous spermatangial filaments (arrows) issued from spermatangial branch (spb) during spermatangial development; (E) Cross section of immature spermatangial conceptacle showing primary (arrows) and secondary (arrowheads) spermatangial filaments; (F) Cross section of mature spermatangial conceptacle showing primary (arrows) and secondary (arrowheads) spermatangial filaments, as well as the spermatangial mother cell (spm) terminally produced from the secondary spermatangial filaments; (G) Magnification of spermatangial mother cell (spm) terminally produced from the secondary spermatangial filaments.

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