File:Barnacles on beach clast (Hulls Cove, Mt. Desert Island, Maine, USA) 2.jpg
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| Description |
English: The whitish spots on this rock are barnacles, an odd group of crustacean arthropods. Crustaceans are a large group of invertebrates that inhabit marine, marginal marine, freshwater, and terrestrial habitats. The group includes crabs, lobsters, shrimp, crayfish, barnacles, ostracods, and other organisms. The oldest fossil crustaceans are in the Cambrian. The group experienced a significant radiation in the oceans during the Mesozoic Marine Revolution.
Barnacles are sessile, benthic, filter-feeding, marine crustaceans that are obligate hard substrate encrusters. They are particularly common in intertidal, rocky shore environments. They can tolerate subaerial exposure during low tides but have to be in water at least occasionally. When submerged, they extend their feathery limbs to filter feed. The barnacle body is enclosed in a small, cinder cone volcano-shaped carapace composed of overlapping calcareous plates. Fossil barnacles first appear in Cambrian rocks. Classification: Animalia, Arthropoda, Crustacea, Maxillopoda, Cirripedia Locality: coastline at Hulls Cove, eastern side of Route 3, northeastern Mt. Desert Island, coastal Maine, USA (44° 24.940’ North latitude, 68° 15.047’ West longitude) |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/50607291223/ |
| Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/50607291223. It was reviewed on 18 November 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 01:00, 18 November 2020 | | 3,008 × 1,689 (3.3 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/50607291223/ with UploadWizard |
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