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Scientists' concepts of which organisms should be termed algae (alga, singular; algae, plural; algal, adjective) have changed radically over the past two centuries. The term algae originally referred to almost all aquatic, photosynthetic organisms. But, as more has been learned about the evolutionary
| EUKARYOTIC ALGAE | ||||||||
| Division | Common Name | Pigments | Habitats | General Morphology | ||||
| Glaucophyta | Chlorophyll a | Freshwater | Unicellular flagellates | |||||
| Phycocyanin | ||||||||
| Rhodophyta | Red algae | Chlorophyll a | Mostly marine | Unicells, filaments, thalli; no flagellated stages; some calcified, some mucilaginous | ||||
| Phycoerythrin | ||||||||
| Phycocyanin | ||||||||
| Cryptophyta | Cryptomonads | Chlorophyll a | Marine and freshwater | Mostly unicells | ||||
| Chlorophyll c | ||||||||
| Phycocyanin | ||||||||
| Phycoerythrin | ||||||||
| Heterokontophyta | ||||||||
| (Ochrophyta) | ||||||||
| Chrysophyceae | Golden brown algae | Chlorophyll a | Freshwater | Mostly unicells or colonies; biflagellate | ||||
| Chlorophyll c | ||||||||
| Fucoxanthin | ||||||||
| Xanthophyceae Chlorophyll | Chlorophyll a | Mostly freshwater and terrestrial; some marine | Coccoid, flagellate, or amoeboid unicells; colonies, uni- and multinucleate filaments; biflagellate | |||||
| (Tribophyceae) | Chlorophyll c | |||||||
| Eustigmatophyceae | Chlorophyll a | Freshwater and marine | Unicells and coccoid; uni- or biflagellate | |||||
| Violaxanthin | ||||||||
| Bacillariophyceae | Diatoms | Chlorophyll... | ||||||
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This section contains 1,766 words (approx. 6 pages at 300 words per page) |
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