File:Ctenizidae Cork-lid Trapdoor spider dwelling IMG 4025s.JPG
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DescriptionCtenizidae Cork-lid Trapdoor spider dwelling IMG 4025s.JPG |
English: Ctenizidae, probable genus: Stasimopus. Cork-lid Trapdoor spider burrow saved intact in baking powder tin ca late 19th century |
Date | |
Source | Own work |
Author | JonRichfield |
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This specimen of an intact Cork-lid Trapdoor spider burrow was dug out about a century ago and kept among the effects of a South African naturalist who was killed in WWI, Edward Stuart Cardinal Dyke (c. 1873-1915)[1]. The probable location of the nest in the wild would be somewhere in the rural Eastern Cape. The diameter of the tin was about 50 mm. The depth might be about 100 mm. This shot shows the depth and texture of the inside of the burrow. The ring of punctures on the inside of the lid shows where the spider had held the lid closed from within, suggesting that the burrow had been occupied for some years.
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 16:03, 12 January 2012 | 2,057 × 2,283 (1.04 MB) | JonRichfield (talk | contribs) |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot A650 IS |
Exposure time | 1/20 sec (0.05) |
F-number | f/2.8 |
ISO speed rating | 160 |
Date and time of data generation | 16:04, 12 January 2012 |
Lens focal length | 7.4 mm |
Orientation | Normal |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
File change date and time | 17:40, 12 January 2012 |
Y and C positioning | Centered |
Exif version | 2.2 |
Date and time of digitizing | 16:04, 12 January 2012 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 4.3125 |
APEX aperture | 2.96875 |
APEX exposure bias | 0 |
Maximum land aperture | 2.96875 APEX (f/2.8) |
Metering mode | Spot |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 13,745.704467354 |
Focal plane Y resolution | 13,698.630136986 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |