Classification of planktonic stages of extant brachiopods

Q2 Agricultural and Biological Sciences

Invertebrate Zoology Pub Date : 2021-01-01 DOI:10.15298/invertzool.18.2.04

V. Malakhov, T. Kuzmina, A. Madison

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引用次数: 2

Abstract

Brachiopods are characterized by a pelago-benthic life cycle and strongly differ in their planktonic stages. However, the planktonic stages in brachiopod ontogeny still do not have special names. Here we propose names for all planktonic stages of extant brachiopods. The chaetotrocha is a larva consisting of a round anterior lobe with a ciliary band and a body with three pairs of larval setae bundles. Lecithotrophic chaetotrocha is a larva of extant Craniiformea. The cephalula is a larva divided into the anterior lobe bearing the apical ciliary tuft and a marginal ciliary band, a mantle lobe with larval setal bundles, and a pedicle lobe. Lecithotrophic cephalula is the only larval stage of recent Rhynchonelliformea. The development of Discinidae includes three planktonic stages succeeding each other. The first is the cephalula. Second developmental stage of Discinidae is the chaetolopha with a rudimentary lophophore and larval spinose setae. The third stage of discinid development is the tegulolopha with a lophophore and a shell. The only planktonic stage of extant Lingulidae is the tegulolopha. Larvalization and embryonization are the main trends in the evolution of larval development of brachiopods. How to site this article: Malakhov V.V., Kuzmina T.V., Madison A.A. 2021. Classification of planktonic stages of extant brachiopods // Invert. Zool. Vol.18. No.2. P.95–104. doi: 10.15298/invertzool.18.2.04

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现存腕足动物浮游阶段的分类

腕足动物的特点是深海底栖生命周期，在浮游阶段有很大的不同。然而，腕足动物个体发育中的浮游阶段仍然没有专门的名称。在这里，我们为现存的腕足动物的所有浮游阶段提出了名称。chaetotrocha是一种幼虫，由一个圆形的前叶和一个纤毛带和一个具有三对幼虫刚毛束的身体组成。卵泡营养型毛囊虫是现存颅形目的一种幼虫。头虫是一幼虫，分为有顶端纤毛簇和边缘纤毛带的前叶、有幼虫刚毛束的衣叶和蒂叶。卵泡营养性头虫是最近的头虫形目唯一的幼虫期。棘虫科的发展包括三个相互接替的浮游阶段。第一个是头足。discinides科的第二个发育阶段是毛体虫，具有初级的叶柄和幼虫的棘刚毛。鉴别发育的第三个阶段是有光导体和壳的条螈。现存Lingulidae的唯一浮游阶段是tegulolopha。幼虫化和胚胎化是腕足动物幼虫发育进化的主要趋势。本文网址:Malakhov v.v.， Kuzmina t.v.， Madison A.A. 2021。现存腕足动物浮游阶段的分类// Invert。黑旋风。研究概述。第二。p.95 - 104。doi: 10.15298 / invertzool.18.2.04

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来源期刊

Invertebrate Zoology Agricultural and Biological Sciences-Animal Science and Zoology

CiteScore

2.40

自引率

0.00%

发文量

期刊介绍： Scientific peer-reviewed journal INVERTEBRATE ZOOLOGY publishes original papers, reviews and brief communications on morphology, anatomy, embryology, taxonomy, phylogeny, and ecology of any group of invertebrates from protistans to lower chordates. INVERTEBRATE ZOOLOGY accepts manuscripts in English or Russian and publishes them in printed and electronic versions. The Russian translations of English titles, abstracts and figure captions of the papers written by non-Russian authors can be provided by the editors. Invertebrate Zoology invites authors to publish extended monographic manuscripts after usual reviewing procedure. The monographic manuscripts can include up to 400 thousand letters and be prepared in English or in Russian. Accepted monographic manuscripts will have priority to be published in the nearest issue of the journal.