File:Pollicipes polymerus (gooseneck barnacles) (Yaquina Head, Oregon, USA) 4.jpg
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Summary
[edit]DescriptionPollicipes polymerus (gooseneck barnacles) (Yaquina Head, Oregon, USA) 4.jpg |
English: Pollicipes polymerus (Sowerby, 1883) - gooseneck barnacles in Oregon, USA.
Crustaceans are a large group of arthropods that inhabit marine, marginal marine, freshwater, and terrestrial habitats. The group include crabs, lobsters, shrimp, crayfish, barnacles, ostracods, and other organisms. The oldest fossil crustaceans are in the Cambrian. Crustaceans experienced a significant radiation in the oceans during the Mesozoic Marine Revolution. The organisms seen here are barnacles, which are sessile, benthic, filter-feeding, marine crustaceans - they are obligate hard substrate encrusters. They are particularly common in intertidal, rocky shore environments. Barnacles 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. For many barnacles, the body is enclosed in a small, cinder cone volcano-shaped carapace composed of overlapping calcareous plates. Gooseneck barnacles are stalked and relatively large, with a vaguely bird head-shaped set of calcareous plates. Fossil barnacles first appear in Cambrian rocks. These individuals are encrusting rocks of the Ginkgo Basalt, one of many lava flows in the Miocene-aged Columbia River Flood Basalt. Classification: Animalia, Arthropoda, Crustacea, Maxillopoda, Cirripedia, Pollicipedomorpha, Pollicipedidae Locality: low tide rocky shoreline on the southern side of Yaquina Head, coastal Oregon, USA Info. at: en.wikipedia.org/wiki/Pollicipes_polymerus and en.wikipedia.org/wiki/Barnacle |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/53274104648/ |
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@N05/53274104648. It was reviewed on 25 October 2023 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
25 October 2023
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current | 17:36, 25 October 2023 | 4,288 × 2,848 (7.96 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/53274104648/ with UploadWizard |
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Exposure time | 1/160 sec (0.00625) |
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ISO speed rating | 320 |
Date and time of data generation | 13:47, 3 August 2012 |
Lens focal length | 250 mm |
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Bits per component |
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Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Adobe Photoshop Elements 20.0 (Macintosh) |
File change date and time | 06:17, 21 October 2023 |
Y and C positioning | Co-sited |
Exposure Program | Not defined |
Exif version | 2.21 |
Date and time of digitizing | 13:47, 3 August 2012 |
Meaning of each component |
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APEX shutter speed | 7.321928 |
APEX aperture | 6 |
APEX exposure bias | 0 |
Maximum land aperture | 5.3 APEX (f/6.28) |
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Light source | Unknown |
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DateTimeDigitized subseconds | 00 |
Supported Flashpix version | 1 |
Color space | sRGB |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 375 mm |
Scene capture type | Standard |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
GPS tag version | 2.2.0.0 |
Serial number of camera | 3562538 |
Lens used | TAMRON AF 18-270mm F3.5-6.3 Di II VC PZD B008N |
Date metadata was last modified | 02:17, 21 October 2023 |
Unique ID of original document | 504D4EE6B803F700D1A504290EF80A51 |