Digestive structures in Middle Ordovician trilobite Prionocheilus Rouault 1847, from the Barrandian area of Czech Republic.

IF 1.3 4区 地球科学 Q2 GEOLOGY
O. Fatka, P. Budil
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引用次数: 3

Abstract

Remains of a digestive system from a slightly damaged articulated specimen of the comparatively rare bathycheilid trilobite Prionocheilus vokovicensis (Snajdr, 1956) are described for the first time. The specimen comes from the Middle Ordovician Sarka Formation of the Prague Basin and contains the midgut region of the digestive system preserved through the axial region of glabella and six anterior thoracic segments. The anterior-most part of the digestive system is unknown as the anterior glabellar lobes are not preserved in the studied specimen. In the cephalic shield, the remains of two pairs of gut diverticulae are seen in the posterior region of the glabella. Remains of five pairs of small cavities developed in the axis of the first six thoracic segments represent the remains of thoracic gut diverticulae. The discussed specimen possess the first undoubted remain of digestive structures established within the family Bathycheilidae (PŘibyl, 1953).
捷克巴兰地地区中奥陶统三叶虫Prionocheilus Rouault 1847的消化结构。
首次描述了相对罕见的三叶虫Prionocheilus vokovicensis(Snaidr,1956)的一个轻微受损的铰接标本的消化系统残骸。该标本来自布拉格盆地的中奥陶世Sarka组,包含通过眉间轴区和六个前胸段保存的消化系统中肠区。消化系统的最前部是未知的,因为研究标本中没有保存眉间前叶。在头罩中,在眉间后部可见两对肠道憩室的残骸。在前六个胸段的轴线上发育的五对小空腔的残余物代表了胸腔肠道憩室的残余物。所讨论的标本拥有第一个在蝙蝠科内建立的毫无疑问的消化结构遗迹(PŘibyl,1953)。
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来源期刊
Geologica Acta
Geologica Acta 地学-地质学
CiteScore
2.50
自引率
6.70%
发文量
13
审稿时长
>12 weeks
期刊介绍: - Relevant conceptual developments in any area of the Earth Sciences. - Studies presenting regional synthesis. - Thematic issues or monographic volumes presenting the results from one or more research groups. - Short papers reflecting interesting results or works in progress. - Contributions and results from Research Projects, Workshops, Symposiums, Congresses and any relevant scientific activity related to Earth Sciences. - Geologica Acta aims to stimulate rapid diffusion of results and efficient exchange of ideas between the widespread communities of Earth Science researchers (with special emphasis on Latinamerica, the Caribbean, Europe, the Mediterranean
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