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Principia (alga)
''Principia'' is a genus of alga that has been placed in the coralline stem group on the basis of its slightly differentiated thallus; it forms an "intermediate" between '' Hortonella'', '' Neoprincipia'' and '' Archaeolithophyllum''. {{Taxonbar, from=Q7245133 Fossil algae ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coralline Alga
Coralline algae are red algae in the order Corallinales. They are characterized by a thallus that is hard because of calcareous deposits contained within the cell walls. The colors of these algae are most typically pink, or some other shade of red, but some species can be purple, yellow, blue, white, or gray-green. Coralline algae play an important role in the ecology of coral reefs. Sea urchins, parrot fish, and limpets and chitons (both mollusks) feed on coralline algae. In the temperate Mediterranean Sea, coralline algae are the main builders of a typical algal reef, the ''Coralligène'' ("coralligenous"). Many are typically encrusting and rock-like, found in marine waters all over the world. Only one species lives in freshwater. Unattached specimens (maerl, rhodoliths) may form relatively smooth compact balls to warty or fruticose thalli. A close look at almost any intertidal rocky shore or coral reef will reveal an abundance of pink to pinkish-grey patches, distributed throug ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hortonella
''Hortonella'' is a fossil genus of alga that has been placed deep in the coralline stem group on the basis of its scarcely differentiated thallus Thallus (plural: thalli), from Latinized Greek (), meaning "a green shoot" or "twig", is the vegetative tissue of some organisms in diverse groups such as algae, fungi, some liverworts, lichens, and the Myxogastria. Many of these organisms wer .... References Fossil algae Carboniferous life {{Carboniferous-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archaeolithophyllum
''Archaeolithophyllum'' is a genus of conceptacle-bearing red alga that falls in the coralline stem group. It somewhat resembles ''Lithophyllum.'' As of today, ''Archaeolithophyllum'' is the only Palaeozoic coralline to bear clear conceptacles, although the earlier ''Graticula'' does bear reproductive structures. It mineralized using aragonite Aragonite is a carbonate mineral, one of the three most common naturally occurring crystal forms of calcium carbonate, (the other forms being the minerals calcite and vaterite). It is formed by biological and physical processes, including prec .... Its conceptacles are cone-shaped protrusions that extend outwards from the thallus surface and have a single central opening. It probably encrusted muddy or sandy surfaces. See also References Red algae genera Paleozoic life of Nunavut {{Rhodophyta-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
