Boreognathus pogorevichi, a remarkable new polychaete annelid from the lower Permian of the Pechora Basin, Russia

IF 2.3 2区 地球科学 Q1 PALEONTOLOGY
D. Shcherbakov, A. Tzetlin, A. Zhuravlev
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引用次数: 1

Abstract

The sclerotized jaw elements (scolecodonts) of polychaete annelids are rarely preserved as articulated jaw apparatuses. Here we describe a morphologically unusual, rather large, and symmetrical jaw apparatus, assigned to the new taxon Boreognathus pogorevichi gen. et sp. nov., from the Kungurian (lower Permian) of the Pechora Coal Basin, northern Cis‐Urals, Russia. Whereas the specimen is mainly preserved as a three‐dimensional external mould of the near‐complete dorsal maxillary apparatus, some organic matter comprising the original jaw wall is also retained. The new taxon combines edentate, pincer‐like first maxillae (MI) typical of the extant Labidognatha apparatus type with long slender carriers common in the Prionognatha type. Unlike the smooth MI, MII are consistently and prominently denticulated. The new genus represents a hitherto unknown type of polychaete jaw apparatus and is assigned to the Palaeozoic family Atraktoprionidae.
俄罗斯佩科拉盆地下二叠世一种新发现的多毛纲环节动物
多毛纲环节动物的硬化颌骨元件(骨节)很少作为关节颌骨装置保存下来。在这里,我们描述了一个形态上不寻常的、相当大的、对称的颚器,归属于来自俄罗斯Cis - Urals北部Pechora煤盆地Kungurian(下二叠世)的新分类群Boreognathus pogorevichi gen. et sp. nov.。虽然标本主要被保存为接近完整的上颌背器官的三维外模,但也保留了一些组成原始颌壁的有机物。这个新分类群结合了现有唇舌龙器官类型典型的有齿钳状第一上颌骨(MI)和唇舌龙类型常见的细长载体。与平滑的MI不同,MII具有一致性和显著的齿状。这一新属代表了一种迄今未知的多毛纲颚器类型,并被分配到古生代Atraktoprionidae科。
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来源期刊
Papers in Palaeontology
Papers in Palaeontology PALEONTOLOGY-
CiteScore
4.50
自引率
4.30%
发文量
55
期刊介绍: Papers in Palaeontology is the successor to Special Papers in Palaeontology and a journal of the Palaeontological Association (www.palass.org). The journal is devoted to the publication of papers that document the diversity of past life and its distribution in time and space. Papers in Palaeontology is devoted to the publication of papers that document the diversity of past life and its distribution in time and space. As a sister publication to Palaeontology its focus is on descriptive research, including the descriptions of new taxa, systematic revisions of higher taxa, detailed biostratigraphical and biogeographical documentation, and descriptions of floras and faunas from specific localities or regions. Most contributions are expected to be less than 30 pp long but longer contributions will be considered if the material merits it, including single topic parts. The journal publishes a wide variety of papers on palaeontological topics covering: palaeozoology, palaeobotany, systematic studies, palaeoecology, micropalaeontology, palaeobiogeography, functional morphology, stratigraphy, taxonomy, taphonomy, palaeoenvironmental reconstruction, palaeoclimate analysis, biomineralization studies.
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