Arbaciidae皇冠海膽科 - Coelopleurus undulatus 棘刺的特徵 (feature of Primary spines)
1. 一級棘刺呈高度彎曲、無環節,遠端末稍為紅色,往近端處漸轉為綠色。
2. 一級棘刺領環背面中脊兩邊無脊但有許多小顆粒。
3. 一級棘刺領環腹面有許多縱脊。
4. 二級刺皆呈球棒狀。
1. 一級棘刺呈高度彎曲、無環節,遠端末稍為紅色,往近端處漸轉為綠色。
Coelopleurus undulatus:
Primary spines are highly curved and unbanded; red distally (on the dorsal surface) blending into green proximally, typically just above the spine's collar.
2. 一級棘刺領環背面中脊兩邊無脊但有許多小顆粒。
Coelopleurus undulatus:
The collar's dorsal surface is highly granular with no ridges either side of the central dorsal ridge.
3. 一級棘刺領環腹面有許多縱脊。
Coelopleurus undulatus:
The collar's ventral surface has many longitudinal ridges.
4. 二級刺皆呈球棒狀。
Coelopleurus undulatus
All secondary spines are club-shaped.
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