SCANNING ELECTRON-MICROSCOPY OF CYPRIS LARVAE OF BALANUS AMPHITRITE (CIRRIPEDIA, THORACICA, BALANOMORPHA)
SCANNING ELECTRON-MICROSCOPY OF CYPRIS LARVAE OF BALANUS AMPHITRITE (CIRRIPEDIA, THORACICA, BALANOMORPHA)
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DOI：
10.2307/1548772
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发表时间：
1995-08-01
影响因子：
1.1
通讯作者：
HOEG, JT
中科院分区：
文献类型：
--
作者：
GLENNER, H;HOEG, JT
本文用扫描电子显微镜观察了达尔文两栖鱼鲤鱼幼虫的外部形态。两面体的鲤鱼一般类似于半条鱼的，但在一些形态细节上不同。在甲壳上，两性半边莲的塞浦路斯比半边莲在甲壳上携带较少的毛孔和刚毛。我们发现触角和尾支在形态上有微小但一致的差异。后者2节，具6个刚毛。胸足类显示出最显著的差异。内足类和外足类都是2节的，但有迹象表明祖先在内足类中分成三节。其近端具1个羽状刚毛，远端具3个羽状刚毛。在胸足类1中，外足类在近端节段ANT的外侧带有短的、镰刀状的刚毛，在远端节段3羽状的刚毛和单个的双锯齿状刚毛。胸足类2-6在远端节段有一个额外的羽状刚毛。我们强调大多数现有描述的不足，只有扫描电子显微镜才能提供未来鲤科形态比较研究所需的形态细节水平。
We describe the external morphology of the cypris larvae of Balanus amphitrite Darwin using scanning electron microscopy. The cyprid of B. amphitrite generally resembles that of Semibalanus balanoides, but differs in a number of morphological details. Cyprids of B. amphitrite carry fewer pores and setae on the carapace than Semibalanus balanoides. We found minor but consistent differences in morphology of the antennules and the caudal rami. The latter are 2-segmented and carry 6 setae. The thoracopods exhibit the most significant differences. The endopods and exopods are both 2-segmented, but with indications of an ancestral division into three segments in the endopod. The endopod carries a single plumose seta on the proximal segment and 3 plumose setae on the distal segment. In thoracopod 1, the exopod carries a short, sickle-shaped seta laterally on the proximal segment anti on the distal segment 3 plumose setae and a single biserrate seta. Thoracopods 2-6 have an additional plumose seta on the distal segment. We emphasize the insufficiency of most existing descriptions and that only scanning electron microscopy allows the level of morphological detail needed for future comparative studies on cyprid morphology.