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首页> 外文期刊>Journal of Molluscan Studies >The anatomy of Pachydermia laevis (Archaeogastropoda : 'Peltospiridae')
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The anatomy of Pachydermia laevis (Archaeogastropoda : 'Peltospiridae')

机译:Pachydermia laevis(Archaeogastropoda:'Peltospiridae')的解剖

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摘要

The anatomy of Pachydermia laevis Waren & Bouchet, 1989 is investigated. It is a deep-sea gastropod and restricted to hydrothermal vents of the East Pacific Rise. Its anatomy resembles that of Melanodrymia aurantiaca Hickman, 1984 (Melanodrymiidae) in most respects, except that its gonopericardial duct opens into the renopericardial duct, not into the pericardial chamber, and that it lacks a copulatory organ. Examination of M. aurantiaca main confirms earlier work. The two species have a cerebral buccal connective fused with the cerebral ganglion (not free from it), a synapomorphy that has not been described for any other archaeogastropod. The investigation suggests that Melanodrymia and Pachydermia are closely related and together with Cyathermiidae and Neomphalidae form a monophyletic group within the Neomphalina. No evidence was found to support earlier speculations about close relations of Neomphalina to Viviparoidea.
机译:研究了Pachydermia laevis Waren&Bouchet,1989的解剖结构。它是一种深海腹足动物,只限于东太平洋上升带的热液喷口。它的解剖学在大多数方面类似于1984年的Aurantiaca Hickman Melanodrymia Hickman(Melanodrymiidae),但它的性心包膜导管通向心包膜导管,而不通向心包腔,并且缺乏交配器官。 M. aurantiaca main的检查确认了较早的工作。这两个物种具有与大脑神经节融合的大脑颊结缔组织(并非游离于此),这是一种突触形态,尚未被其他古足动物描述。调查表明,黑皮病和厚皮病是密切相关的,并且与Cyathermiidae和Neomphalidae一起构成了Neomphalina内的单系群。没有证据支持早期关于新mphalina与Viviparoidea密切关系的推测。

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