File:Martesia striata bivalves in wood borings (driftwood on marine beach, Cayo Costa Island, Florida, USA) 14 (25568858664).jpg
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[edit]DescriptionMartesia striata bivalves in wood borings (driftwood on marine beach, Cayo Costa Island, Florida, USA) 14 (25568858664).jpg |
Martesia striata (Linnaeus, 1758) - "wood piddocks" in Florida, USA (December 2013). Bivalves are bilaterally symmetrical molluscs having two calcareous, asymmetrical shells (valves) - they include the clams, oysters, and scallops. In most bivalves, the two shells are mirror images of each other (the major exception is the oysters). They occur in marine, estuarine, and freshwater environments. Bivalves are also known as pelecypods and lamellibranchiates. Bivalves are sessile, benthic organisms - they occur on or below substrates. Most of them are filter-feeders, using siphons to bring in water, filter the water for tiny particles of food, then expel the used water. The majority of bivalves are infaunal - they burrow into unlithified sediments. In hard substrate environments, some forms make borings, in which the bivalve lives. Some groups are hard substrate encrusters, using a mineral cement to attach to rocks, shells, or wood. The fossil record of bivalves is Cambrian to Recent. They are especially common in the post-Paleozoic fossil record. Shown above are several Martesia striata "wood piddocks", which are famous examples of boring bivalves. These individuals bored into driftwood, but they are also known to excavate other firm and hard substrates. Classification: Animalia, Mollusca, Bivalvia, Heterodonta, Myoida, Pholadidae Locality: marine beach at the southern tip of Cayo Costa Island, Gulf of Mexico coast of southwestern Florida, USA (vicinity of 26° 36' 48.74" North latitude, 82° 13' 19.91" West longitude) More info. at: en.wikipedia.org/wiki/Pholadidae |
Date | |
Source | Martesia striata bivalves in wood borings (driftwood on marine beach, Cayo Costa Island, Florida, USA) 14 |
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@N05/25568858664. It was reviewed on 14 August 2016 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
14 August 2016
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current | 17:32, 14 August 2016 | ![]() | 3,968 × 2,976 (4.38 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via Flickr2Commons |
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Camera manufacturer | OLYMPUS IMAGING CORP. |
Camera model | TG-1 |
Exposure time | 1/320 sec (0.003125) |
F-number | f/4.2 |
ISO speed rating | 320 |
Date and time of data generation | 10:46, 16 December 2013 |
Lens focal length | 13.47 mm |
Latitude | 26° 36′ 48.67″ N |
Longitude | 82° 13′ 19.9″ W |
Width | 3,968 px |
Height | 2,976 px |
Bits per component |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 314 dpi |
Vertical resolution | 314 dpi |
Software used | Adobe Photoshop Elements 13.0 (Macintosh) |
File change date and time | 13:45, 1 April 2016 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.3 |
Date and time of digitizing | 10:46, 16 December 2013 |
Meaning of each component |
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APEX shutter speed | 8.321928 |
APEX aperture | 4.140779 |
APEX exposure bias | −0.3 |
Maximum land aperture | 2 APEX (f/2) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Manual exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 74 mm |
Scene capture type | Standard |
Scene control | High gain up |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Receiver status | Measurement in progress |
Reference for direction of image | Magnetic direction |
Direction of image | 52 |
Name of GPS area | Captiva Island Golf Club |
GPS tag version | 0.0.3.2 |
Serial number of camera | BCA539215 |
Date metadata was last modified | 07:45, 1 April 2016 |
Unique ID of original document | 233E69DA0BE1B871F6A6781920DF6342 |