| growth line |
Impressed lines on the shell-surface due to growth-stages and rest periods.
출처: www.fish.washington.edu/naturemapping/mollusks/glo...
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|---|---|
| growth line |
concentric line marking a stationary or slow period of shell growth.
출처: gmbis.marinebiodiversity.ca/BayOfFundy/glossE-H.ht...
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