玲珑坚藤壶

Solidobalanus ciliatus   Hoek
   

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形态描述

壳圆锥形,稍侧扁,壳板光滑,白色到淡粉红色,有紫红色纵条纹,有时有模糊的淡紫红色斑块散布,吻板色略淡,峰板高而尖。幅部宽阔,较厚,顶缘斜,白色、橙色到粉红色,常有褐色到紫红色纵条纹断续相交,有横沟纹,侧缘有锯齿。翼部白色或淡粉红色,薄,顶缘稍斜。壳口大,菱形到五角形,边缘呈锯齿状。
盖板内膜外部为污白色,有紫色斑点,内部紫红色。楯板呈窄三角形,顶端较尖,外表污白色,有模糊淡红色纵条纹,生长脊不清楚,开闭缘有齿;内面污白色,关节脊不突出,长度超过背缘之半,下端斜截,关节沟较窄,闭壳肌脊不明显。背板通常较窄长,峰缘较短,上部稍突出,楯缘直或内弯,外面生长脊不清楚,有时在板的峰侧有褐色模糊条纹,中央沟不明显下凹。内面污白色,关节脊清楚,关节沟浅,上端有三角形顶叶;矩末端钝圆或斜截,有时具几个小齿,侧缘到基楣角的距离较小,侧压肌脊发达,5~7条。
鞘部略短,有横生长纹。鞘下有纵肋直到基底,肋下端两侧为圆齿状。
基底薄,有从中央放射的沟。
上唇中央缺刻的每侧具3~4齿,唇的前缘稍直。大颚5齿,第1~3齿尖锐。小颚上下大对刺间有4~5个中型刺。第2小颚上叶较尖,下叶半圆形,触须略成方形,上缘直,前缘拱,下缘有细短毛。

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