DOAJ Open Access 2017

A new marrellomorph euarthropod from the Early Ordovician of Argentina

María J. Aris Jose A. Corronca Sebastián Quinteros Paolo L. Pardo

Abstrak

Marrellomorphs (class Marrellomorpha) are a group of Paleozoic arthropods with a very poor fossil record. Here we describe a new marrellomorph arthropod Mimetaster florestaensis sp. nov. from the Tremadocian (earliest Ordovician) of Argentina. The new species is characterized by the shape and direction of the three pairs of principal spines, and the existence of strong secondary spines only in the proximal two-thirds of the anterolateral spines. As a result of phylogenetic analysis the new species integrates a trichotomy with Mimetaster hexagonalis and a Moroccan unnamed marrellid as sister groups. This discovery increases the known diversity of Marrellomorpha and represents the first occurrence of this group in South America, expanding the spatial distribution of the clade.

Topik & Kata Kunci

Fossil man. Human paleontology Paleontology

Penulis (4)

María J. Aris

Jose A. Corronca

Sebastián Quinteros

Paolo L. Pardo

Format Sitasi

APA MLA BibTeX

Aris, M.J., Corronca, J.A., Quinteros, S., Pardo, P.L. (2017). A new marrellomorph euarthropod from the Early Ordovician of Argentina. https://doi.org/10.4202/app.00240.2016

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Informasi Jurnal

Tahun Terbit: 2017
Sumber Database: DOAJ
DOI: 10.4202/app.00240.2016
Akses: Open Access ✓