A new species, Ozarkodina huenickeni, from the upper Silurian - Lower Devonian in San Juan Precordillera, South America. (June 2021)

• Record Type: Journal Article
• Authors: Gómez, María José; Mestre, Ana; Corradini, Carlo; Heredia, Susana
• Is Part Of: Journal of South American earth sciences. Volume 108(2021)
• Publication Date: 2021-06
• Subjects: Ozarkodina -- Precordillera -- New species -- Silurian -- Phylogeny; Geology -- Latin America -- Periodicals; Earth sciences -- Latin America -- Periodicals; Geology -- Antarctica -- Periodicals; Earth sciences -- Antarctica -- Periodicals; Geology -- Caribbean Area -- Periodicals; Earth sciences -- Caribbean Area -- Periodicals; Géologie -- Amérique latine -- Périodiques; Sciences de la terre -- Amérique latine -- Périodiques; Géologie -- Antarctique -- Périodiques; Sciences de la terre -- Antarctique -- Périodiques; Géologie -- Caraïbes (Région) -- Périodiques; Sciences de la terre -- Caraïbes (Région) -- Périodiques; Earth sciences; Geology; Antarctica; Caribbean Area; Latin America; Periodicals; 550.5
• DOI: 10.1016/j.jsames.2021.103174
• Languages: English
• ISSNs: 0895-9811

Abstract

Abstract: The study on Silurian-Devonian conodonts from the Precordillera has shown a significant increase in the last 5 years. In the new conodont collections, particular specimens of Ozarkodina were obtained from the middle and upper parts of the Los Espejos Formation in the Talacasto region. The taxonomic study allows us to propose a new species of the genus Ozarkodina, named Ozarkodina huenickeni sp. nov., which shows three different morphotypes, α, β and γ, respectively, based on the presence of ornamentation above the platform lobes. The species ranges from the Pedavis latialata - Ozarkodina snajdri interval Zone to the Icriodus hesperius Zone, Ludfordian to early Lochkovian in age. The phylogenetic analysis of Oz. huenickeni sp. nov. allows us to propose that this species could belong to the bohemica lineage, probably representing a South American endemic taxon. Highlights: The taxonomic study allows us to propose a new species of the genus Ozarkodina. The carminate P1 element is characterized by a discrete leaf-shaped platform expanded. The lobes of the platform may or may not be ornamented by nodes and/or ridge. In the middle part of the blade, the denticles have the same height or they are fused.