File:Gastropod shell measuring.png
From Infogalactic: the planetary knowledge core
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Summary
Schematic representation/drawing of the apical, apertural and basal view of the shell (probably Trochulus sp.) shows of the 14 measurements. Dotted lines represent orientation axes.
- N complete whorls
- P partail whorls
- NTW computed as the number of complete whorls plus the partial whorl (in degrees; divided by 360)
- APX the width of the apex
- SP1 the width of the first whorl
- SP2 the width of the second whorl
- SP3 the width of the third whorl
- DWL the diameter of the spire without the last whorl
- HSP the height of the spire
- HFW the height of the first whorl
- DPR the diameter of the peristome
- HPR the height of the peristome
- DSP the diameter of the spire
- AES the shape, measured as the angle formed by the apex and the most external sutures
- DOM the diameter of the umbilicus
- WWO the width of the shell without the opening
Licensing
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 14:52, 15 January 2017 | | 300 × 746 (57 KB) | 127.0.0.1 (talk) | Schematic representation/drawing of the apical, apertural and basal view of the shell (probably <i>Trochulus</i> sp.) shows of the 14 measurements. Dotted lines represent orientation axes. <ul> <li> N complete whorls</li> <li> P partail whorls</li> <li> NTW computed as the number of complete whorls plus the partial whorl (in degrees; divided by 360)</li> <li> APX the width of the apex</li> <li> SP1 the width of the first whorl</li> <li> SP2 the width of the second whorl</li> <li> SP3 the width of the third whorl</li> <li> DWL the diameter of the spire without the last whorl</li> </ul> <ul> <li> HSP the height of the spire</li> <li> HFW the height of the first whorl</li> <li> DPR the diameter of the peristome</li> <li> HPR the height of the peristome</li> <li> DSP the diameter of the spire</li> <li> AES the shape, measured as the angle formed by the apex and the most external sutures</li> </ul> <ul> <li> DOM the diameter of the umbilicus</li> <li> WWO the width of the shell without the opening</li> </ul> |
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