Pseudosycidium

views updated May 23 2018

Pseudosycidium The first of the charophytes, a distinct, new, evolutionary line of green algae which arose during the Silurian and whose method of reproduction was sexual. Well-developed male (antheridia) and female (oogonia) organs can be identified, the secretion of calcium carbonate around the female organs assisting preservation.

Pseudosycidium

views updated May 08 2018

Pseudosycidium The first of the Charales, a distinct evolutionary line of green algae which arose during the Upper Silurian and whose method of reproduction was sexual. Well-developed male (antheridia) and female (oogonia) organs can be identified, the secretion of calcium carbonate around the female organs assisting preservation. See also CHAROPHYCEAE; and GYROGONITE.

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