Department of Anatomy and Neuroscience, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan.
Center for Marine Environmental Studies, Ehime University, Matsuyama, Japan.
J Comp Neurol. 2019 Mar 1;527(4):874-900. doi: 10.1002/cne.24547. Epub 2018 Dec 5.
Gobiida is a basal subseries of percomorphs in teleost fishes, holding a useful position for comparisons with other orders of Percomorpha as well as other cohort of teleosts. Here, we describe a telencephalic atlas of a Gobiida species Rhinogobius flumineus (Mizuno, Memoirs of the College of Science, University of Kyoto, Series B: Biology, 1960; 27, 3), based on cytoarchitectural observations, combined with analyses of the distribution patterns of neurochemical markers and transcription factors. The telencephalon of R. flumineus shows a number of features distinct from those of other teleosts. Among others, the followings were of special note. (a) The lateral part of dorsal telencephalon (Dl), which is known as a visual center in other teleosts, is composed of as many as seven regions, some of which are conspicuous, circumscribed by cell plates. These subdivisions of the Dl can be differentiated clearly by differential soma size and color with Nissl-staining, and distribution patterns of neural markers. (b) Cell populations continuous with the ventral region of dorsal part of ventral telencephalon (vVd) exhibit extensive dimension. Especially, portion 1 of the central part of ventral telencephalon appears to represent a cell population laterally translocated from the vVd, forming a large cluster of small cells that penetrate deep into the central part of dorsal telencephalon. (c) The magnocellular subdivision of dorsal part of dorsal telencephalon (Ddmg) contains not only large cells but also vglut2a-positive clusters of small cells that cover a wide range of the caudal Ddmg. Such clusters of small cells have not been observed in the Ddmg of other teleosts.
古比鱼是硬骨鱼类的一个基础亚目，在与其他硬骨鱼目以及其他硬骨鱼类类群的比较中具有重要地位。本文描述了一种古比鱼 Rhinogobius flumineus（三隅，京都大学理学部纪要，生物学，1960；27，3）的端脑图谱，该图谱基于细胞构筑学观察，并结合神经化学标志物和转录因子的分布模式进行了分析。古比鱼的端脑具有许多与其他硬骨鱼类不同的特征。其中，特别值得注意的是以下几点。(a) 背侧端脑的外侧部分（Dl），在其他硬骨鱼类中被认为是一个视觉中心，由多达七个区域组成，其中一些区域由细胞板围成的边界明显，界限分明。这些 Dl 的细分可以通过 Nissl 染色和神经标志物的分布模式来区分，通过不同的体细胞大小和颜色来区分。(b) 与腹侧端脑腹侧部（vVd）的腹侧部分连续的细胞群体具有广泛的维度。特别是，腹侧端脑的中央部分的第 1 部分似乎代表了从 vVd 侧向迁移而来的细胞群体，形成了一个大的小细胞群，深入到背侧端脑的中央部分。(c) 背侧端脑的背侧部分（Ddmg）的大细胞亚区不仅包含大细胞，还包含 vglut2a 阳性的小细胞簇，这些小细胞簇覆盖了 Ddmg 的尾侧广泛区域。这种小细胞簇在其他硬骨鱼类的 Ddmg 中尚未观察到。
