Florideophyceae

Florideophyceae
Temporal range:
Neoproterozoic–present
"Florideae" from Ernst Haeckel's Kunstformen der Natur, 1904
Scientific classification
(unranked): Archaeplastida
Division: Rhodophyta
Subdivision: Eurhodophytina
Class: Florideophyceae
Cronquist, 1960
Subgroups

See text.

Florideophyceae is a class of exclusively multicellular red algae. They were once thought to be the only algae to bear pit connections, but these have since been found in the filamentous stage of the Bangiaceae. They were also thought only to exhibit apical growth, but there are genera known to grow by intercalary growth. Most, but not all, genera have three phases to the life cycle.

Classification

A Laurencia red alga from Hawaii

There are various classification schemes; see red algae. One option is to use the following:

Subclass Hildenbrandiophycidae

Subclass Nemaliophycidae

Subclass Corallinophycidae

The subclass Corallinophycidae was introduced in 2007.

Subclass Ahnfeltiophycidae

Subclass Rhodymeniophycidae

According to molecular clock analysis, Florideophyceae diverged from other red algae about 943 (817–1,049) million years ago. It split into Hildenbrandiophycidae ca. 781 (681–879) mya, Nemaliophycidae ca. 661 (597–736) mya and Corallinophycidae ca. 579 (543–617) mya, and ca. 508 (442–580) mya the split between Ahnfeltiophycidae and Rhodymeniophycidae occurred.


This page was last updated at 2023-12-27 21:23 UTC. Update now. View original page.

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