Abstract

The osteological description of the ocular head region and the pectoral girdle (using alizarin-stained preparations) of Ipnops agassizii Garman, 1899 (family Ipnopidae) was made based on material collected from bathyal and ultra-abyssal depths (3020–5410 m). A detailed description of the axial skeleton is provided and features of the fin skeleton are analyzed (using X-ray images). The morphological transformations in the skeleton that occurred as a result of living at great depths are considered. The wide range of functional and morphological specializations, which have an adaptive pattern aimed at adaptation to deep-sea habitats in contact with the bottom, are shown. The fin rays of the unpaired fins and their supporting elements (respectively, interneuralia and interhaemalia) have reinforced bony heads. The pelvic fins are located at the vertical line through the tips of the pectoral fin rays, slightly anteriorly of the mid-body level. The dorsal fin is located far anteriorly of the anal fin. The caudal peduncle is equally flattened both laterally and dorsoventrally.

中文翻译：

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来自澳大利亚-新西兰地区深海和深海深处的Ipnops agassizii Garman，1899年（食足类：Ipnopidae）的骨学特征，并着重说明了这些发现的生物地理意义

摘要

Ipnops agassizii的眼头区域和胸带（使用茜素染色的制剂）的骨学描述Garman，1899年（I科）是根据从海底和深渊（3020–5410 m）深度收集的材料制成的。提供了轴向骨架的详细说明，并分析了鳍骨架的特征（使用X射线图像）。考虑了由于生活在很深的深度而发生的骨骼形态变化。显示了范围广泛的功能和形态专长，这些专长具有适应模式，旨在适应与海底接触的深海生境。不成对的鳍及其支撑元件（分别是神经间膜和血液间膜）的鳍射线增强了骨头的头部。骨盆鳍位于垂直线，穿过胸鳍射线的尖端，在身体中部水平的前面。背鳍位于肛门鳍的前方。尾柄在侧面和背面均等地变平。