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首页> 外文期刊>Russian journal of marine biology >Morphological Characters And Classification Of The Subclassmonilifera (pogonophora) And The Problem Of Evolution of The Bridle In Pogonophorans
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Morphological Characters And Classification Of The Subclassmonilifera (pogonophora) And The Problem Of Evolution of The Bridle In Pogonophorans

机译：go猴亚纲的形态特征，分类和的进化问题

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摘要

This paper presents the results of the revision of the subclass Monilifera (Pogonophora) based on an analysis of all currently known morphological features. The most important diagnostic characters of Monilifera are the presence of two tentacles without pinnules, a neurotroch on the forepart, a fragmented bridle, a transparent rigid tube, the lack of postannular region, and spermatophores. A few characters are newly proposed for the systematics of Monilifera: the length of tentacles, cephalic lobe, and forepart relative to the forepart diameter, average forepart diameter, paired coelom I, the presence of multicellular glands in the prefrenular region of first segment, the lack of muscular ridges of girdles, unfolded and nonconcave opisthosomal growth zone, teethed opisthosomal setae being arranged in four transverse rows or in a circle on each setigerous segment. The modified and expanded differential diagnoses of subclass Monilifera, order Sclerolinida, family Sclerolinidae, and genus Sclemlinum are given. Archeolinum gen. n. is erected to accommodate all moniliferan species, except for Sclemlinum sibogae Southward, 1961, on the basis of bridle and tube structure, as well as the most important morphometrie parameters of forepart. All data on the morphology and evolution of the bridle as one of the most peculiar organs of pogonophorans are systematized. A complete series of transformations of the bridle structure is proposed: from plesiomorphic simple cuticular plaques scattered on the forepart dorsal surface to regular plaques with a thickened edge, ridge, and rodlike bodies. The merging of individual cuticular plaques and the reduction of their membranes resulted in the formation of a fused bridle. However, the traces of rodlike bodies and their derivates (the so-called blocks) can be found in many apomorphic bridles. Finally, total reduction of all elements of the initial cuticular plaque, except the thickened edge, led to the formation of a homogenous bridle, which is characteristic of most pogonophorans.
机译：本文基于对所有当前已知的形态学特征的分析，介绍了Monilifera（Pogonophora）子类的修订结果。 Monilifera最重要的诊断特征是存在两个没有针尖的触手，前额神经支，tro裂，透明的硬管，缺乏环后区域和精原细胞。新提出了一些针对Monilifera系统的特征：触角，头状叶和前额的长度相对于前额直径，平均前额直径，成对的腔突I，在第一节的前肾区域中存在多细胞腺，缺乏腰带的肌肉脊，未折叠的凹形的阿胶体生长区，齿状的阿胶体刚毛以四个横向行或在每个硬毛节上成一圈排列。修改和扩展的鉴别诊断亚类Monilifera，巩膜纲目，巩膜纲目科和Sclemlinum属。古细菌。根据bri和管的结构以及前部最重要的形态参数，竖立可容纳所有moniliferan物种，但1961年的Sclemlinum sibogae Southward除外。有关po作为最独特的器官之一的bri的形态和进化的所有数据都被系统化了。提出了the形结构的完整系列转换：从散布在前背表面的多形简单角质层斑块到边缘，脊和杆状体变厚的规则斑块。单个表皮斑块的合并及其膜的减少导致融合bri的形成。但是，杆状体及其衍生物（所谓的块）的痕迹可以在许多不规则形的bri中找到。最后，最初的表皮斑块的所有元素（增厚的边缘除外）全部减少，导致形成均质的bri绳，这是大多数pogonophorans的特征。

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