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FIRST CARBONIFEROUS THYLACOCEPHALAN FROM EUROPE AND ITS SIGNIFICANCE FOR THE UNDERSTANDING OF FUNCTIONAL MORPHOLOGY OF CONCAVICARIDIDAE SCHRAM, 2014
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FIRST CARBONIFEROUS THYLACOCEPHALAN FROM EUROPE AND ITS SIGNIFICANCE FOR THE UNDERSTANDING OF FUNCTIONAL MORPHOLOGY OF CONCAVICARIDIDAE SCHRAM, 2014
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Journal Article
FIRST CARBONIFEROUS THYLACOCEPHALAN FROM EUROPE AND ITS SIGNIFICANCE FOR THE UNDERSTANDING OF FUNCTIONAL MORPHOLOGY OF CONCAVICARIDIDAE SCHRAM, 2014
2018
Overview
Thylacocephala Pinna, Arduini, Pesarini & Teruzzi 1982 are among the most enigmatic arthropods. Their fossil record is very patchy both geographically and stratigraphically. In this paper we describe the first thylacocephalan known from the Carboniferous (Mississippian) of Europe, Concavicaris viktoryni sp. nov. Until now Carboniferous representatives of Thylacocephala were know exclusively from the U.S.A. We discuss the stratigraphic and geological context of occurrence of this new species as well as form and function of the unique carapace micro- and macro-ornamentation. A shape and assumed function of the characteristic lirae on the C. viktoryni sp. nov. carapace present an important supporting argument for the supposed free-swimming or pelagic mode of life in thylacocephalans. Palaeobiogeographical and evolutionary aspects of surprisingly rich but local occurrence of thylacocephalans in the Lower Carboniferous of the Moravian karst are discussed. Possible sympatric evolution from its predecessor Concavicaris incola is also pointed out.
Les Thylacocephala Pinna, Arduini, Pesarini & Teruzzi 1982 sont parmi les arthropodes les plus énigmatiques. Leur présence en tant que fossiles est très fragmentaire à la fois géographiquement et stratigraphiquement. Dans cette étude, nous décrivons le premier Thylacocephala connu du Carbonifère (Mississippien) d’Europe, Concavicaris viktoryni sp. nov. Jusqu’à présent, les représentants de Thylacocephala du Carbonifère étaient exclusivement connus des U.S.A. Nous discutons le contexte stratigraphique et géologique de la présence de cette nouvelle espèce ainsi que la forme et la fonction de la micro- et de la macro-ornementation uniques de la carapace. Une forme et une fonction supposée des lirae caractéristiques sur la carapace C. viktoryni sp. nov. constituent un argument important en faveur du mode de vie supposé libre ou pélagique chez les Thylacocephala. Les aspects paléobiogéographiques et évolutionnaires de la présence étonnamment riche bien que locale des Thylacocephala dans le Carbonifère inférieur du karst de Moravie sont discutés. Une évolution sympatrique possible à partir de son prédécesseur Concavicaris incola est aussi soulignée.
Publisher
BRILL,Brill Academic Publishers, Inc
Subject
