File:Rhipocephalus phoenix (pinecone alga) (San Salvador Island, Bahamas).jpg
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Summary
| Description |
Rhipocephalus phoenix (Ellis & Solander, 1786) - pinecone alga on shallow, aragonitic sandy seafloor. Rhipocephalus is a calcareous green alga - the nested circlets of flattened blades have tiny particles of aragonite (CaCO3 - calcium carbonate). After the alga dies and the soft parts decay away, the aragonitic portions become clay- & silt-sized seafloor sediments. A significant percentage of shallow seafloor and shoreline sediments in the Bahamas is from calcareous algae. Many carbonate petrologists suggest that ancient fine-grained limestones (micritic limestones; micrites) are diagenetically altered deposits of calcareous green algae. The pale green cup-on-a-stalk on the right side of the photo is Acetabularia, the Mermaid's wine-glass alga. The fuzzy whitish-green organism behind & to the left of the pinecone alga at center is Batophora, a dasyclad green alga. Classification of Rhipocephalus: Chlorophyta, Bryopsidales, Udoteaceae Locality: shallow seafloor just west of North Point Peninsula, southeastern Graham's Harbour, northeastern San Salvador Island, eastern Bahamas |
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| Date | ||||
| Source | Rhipocephalus phoenix (pinecone alga) (San Salvador Island, Bahamas) 1 | |||
| Author | James St. John | |||
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_(San_Salvador_Island,_Bahamas)_1_(15861862249).jpg)
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This image, originally posted to Flickr, was reviewed on 28 December 2014 by the administrator or reviewer Leoboudv, who confirmed that it was available on Flickr under the stated license on that date. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 01:53, 28 December 2014 | | 1,863 × 1,359 (807 KB) | Tillman | Cropped 36 % horizontally and 27 % vertically using CropTool with lossless mode. |
| 01:51, 28 December 2014 |  | 2,928 × 1,868 (1.56 MB) | Tillman | {{Information |Description=Rhipocephalus phoenix (Ellis & Solander, 1786) - pinecone alga on shallow, aragonitic sandy seafloor. Rhipocephalus is a calcareous green alga - the nested circlets of flattened blades have tiny particles of aragonite (CaCO3... |
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