Adriaens D, Verraes W, Taverne L
University of Ghent, Institute of Zoology, Belgium.
Eur J Morphol. 1997 Jul;35(3):181-208. doi: 10.1076/ejom.35.3.181.13070.
The cranial lateral-line system, as well as the canal bones are well developed in the African clariid catfish Clarias gariepinus. A generalised cranial lateral-line pattern is present (supraorbital, infraorbital, preoperculo-mandibular, otic, postotic and temporal canals). The supratemporal commissure, however, is missing, although a supraorbital commissure is present (formed through the fusion of the epiphysial branches). In addition to canals, some pit-lines are present which cover both canal regions and non-canal regions (vertical, horizontal, oral, anterior, middle and posterior pit-lines). In this paper, several ontogenetic stages of the canal related bones in C. gariepinus were studied. A description of the canal bones, as well as some considerations concerning their nomenclature are given. All canal bones develop, whereas the parietal bone seems to have fused with the supraoccipital bone during ontogeny, as has been observed in some siluroids. The extrascapulars (= supratemporals) are missing in C. gariepinus, as is the case in many siluroids. The posttemporal and supracleithral bones have fused as well. Surprisingly, some separate splenial bones, enclosing the distal part of the mandibular canal are present. Some secondary modifications indicate the apomorphic features of the Clariidae. The infraorbital bones, from which the antorbital bone has lost the antorbital commissure, and the suprapreopercular bone are enlarged, plate-like bones. The nasal bone has undergone some secondary, plate-like extensions as well.
在非洲胡子鲶（Clarias gariepinus）中，颅侧线系统以及管骨发育良好。存在一种普遍的颅侧线模式（眶上、眶下、前鳃盖 - 下颌、耳、耳后和颞管）。然而，虽然存在眶上连合（通过松果体分支融合形成），但颞上连合缺失。除了管道外，还存在一些凹坑线，其覆盖管道区域和非管道区域（垂直、水平、口部、前部、中部和后部凹坑线）。本文研究了非洲胡子鲶中与管道相关骨骼的几个个体发育阶段。给出了管骨的描述以及关于其命名的一些考虑。所有管骨都发育，而顶骨在个体发育过程中似乎与枕骨融合，这在一些鲶形目鱼类中已被观察到。非洲胡子鲶中没有肩胛外骨（=颞上骨），许多鲶形目鱼类也是如此。颞后骨和上匙骨也已融合。令人惊讶的是，存在一些分离的夹板骨，包围着下颌管的远端部分。一些次生变化表明了胡子鲶科的近裔性状。眶下骨（其中眶前骨失去了眶前连合）和眶上前骨是扩大的板状骨。鼻骨也经历了一些次生的板状延伸。
