THE EARLY ONTOGENY OF THE SENSORY LINES AND THE DERMAL SKULL IN POLYPTERUS1
THE EARLY ONTOGENY OF THE SENSORY LINES AND THE DERMAL SKULL IN POLYPTERUS1
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多鳍鱼感觉线和真皮头骨的早期个体发育1
DOI：
10.1111/j.1463-6395.1958.tb00387.x
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发表时间：
1958
期刊：
影响因子：
1.2
通讯作者：
Torsten Pehrson
中科院分区：
文献类型：
--
作者：
Torsten Pehrson
在作者描述的24毫米标本中，神经颅骨中只有蝶骨和枕骨两处骨化。 9.6 毫米的样本没有显示任何情况。早期软骨膜骨化仅在内脏颅骨中出现。多鳍鱼的典型特征是，感觉管中的感觉器官数量恒定，而坑线系统中的神经丘数量略有不同。在本文描述的四个幼虫阶段中，没有任何迹象表明未来感觉管的形成。感觉器官仍然处于相当表面的位置，未来的管器官和坑线器官之间在大小或结构上没有任何区别。
In the 24 mm specimen described by the author there are only two ossifications in the neural cranium, the sphenoid and the occipital. The 9.6 mm specimen shows none. Incipient perichondral ossification shows only in the splanchnocranium. Typical of Polypterus is, the constant number of sense organs in the sensory canals, whereas the number of neuromasts in the pit line system varies somewhat. In none of the four larval stages described in this article is there any indication of the forming of the future sensory canals. The sense organs are still lying quite superficially, and no difference in size or structure between the future canal organs and the pit line organs can be discerned.