González-Pisani Ximena, Gaspar Dellatorre Fernando, López-Greco Laura
National Patagonian Center (CENPAT-CONICET), Puerto Madryn, Chubut, Argentina.
Zootaxa. 2013;3718:301-16. doi: 10.11646/zootaxa.3718.4.1.
The embryonic development of the spider crabs Leurocyclus tuberculosus and Libinia spinosa was divided into five periods based on the differentiation of: (I) cleavage, (II) embryonic primordium, III) optic lobes, (IV) optic lobes pigmented and (V) chromatophores presence. Different traits such as spines, setae and telson morphology distinguish the two species from period III until hatching. Egg volume was greater in Leurocyclus tuberculosus than in Libinia spinosa. The duration of each period was different during development. Whereas in Leurocyclus tuberculosus period II (morphogenesis) is the longest, in Libinia spinosa the period IV is the longest. Complete embryonic development at 14'C lasted 36.7 +/- 3.1 days in Leurocyclus tuberculosus and 57.4 +/- 4.4 days in Libinia spinosa.
基于以下分化，将蜘蛛蟹Leurocyclus tuberculosus和Libinia spinosa的胚胎发育分为五个时期：（I）卵裂，（II）胚胎原基，（III）视叶，（IV）色素沉着视叶和（V）色素细胞出现。从第三期到孵化，诸如刺、刚毛和尾节形态等不同特征区分了这两个物种。Leurocyclus tuberculosus的卵体积大于Libinia spinosa。发育过程中每个时期持续时间不同。在Leurocyclus tuberculosus中，第二期（形态发生）最长，而在Libinia spinosa中，第四期最长。在14℃下，Leurocyclus tuberculosus的胚胎完全发育持续36.7±3.1天，Libinia spinosa则为57.4±4.4天。
