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      TAXONOMY AND BIOSTRATIGRAPHIC RECORD OF THE UPPER TRIASSIC CONODONTS OF THE PIZZO MONDELLO SECTION (WESTERN SICILY, ITALY), GSSP CANDIDATE FOR THE BASE OF THE NORIAN

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          Abstract

          <p class="abstract-testo">New taxonomic and biostratigraphic investigations on the late Carnian to Rhaetian (Upper Triassic) platform conodonts from the Pizzo Mondello section (Western Sicily, Italy, Sicano basin) are here presented. Pizzo Mondello is one of the two GSSP candidates for the Carnian/Norian boundary; the section is a 430 m thick continuous succession of upper Carnian to upper Norian marine limestones (Scillato Formation), characterized by uniform facies and high sedimentation rates, and ca. 20 m of Rhaetian white calcilutites (Portella Gebbia limestone). Pizzo Mondello offers one of the most complete conodont records for this time interval in the Tethys. The conodont faunas are characterized by a large variety of species, belonging to the genera <em>Carnepigondolella</em>, <em>Epigondolella</em>, <em>Metapolygnathus</em>, <em>Misikella</em>, <em>Mockina</em>, <em>Neocavitella</em>, <em>Norigondolella</em>, <em>Paragondolella,</em> and <em>Parvigondolella</em>. The richness of the populations allowed a detailed revision and description of all the Upper Triassic species and morphotypes recovered. The revision of the problematic species <em>Carnepigondolella</em> nodosa and "<em>Metapolygnathus</em> communisti B" was thus possible, leading to the establishment of two new species: <em>Carnepigondolella</em> tuvalica n.sp. and <em>Carnepigondolella</em> gulloae n.sp. The latter species would be a good proxy for the Carnian/Norian boundary in the case that the FAD of <em>Halobia</em> austriaca (sample FNP135a) will be selected as the primary biomarker for the base of the Norian.</p><p class="abstract-testo"> </p>

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          Author and article information

          Journal
          Rivista Italiana di Paleontologia e Stratigrafia
          Università degli Studi di Milano
          01 March 2012
          : 118
          : 1
          Article
          070da6d8e271423d8f84a0b7a7eddbf4
          10.13130/2039-4942/5993

          RIPS is published under a Creative Commons Attribution-NonCommercial-NoDerivatives Licence 4.0 International (CC BY-NC-ND 4.0). The journal allows the author(s) to hold the copyright without restrictions. To view a copy of this license, visit https://creativecommons.org/licenses/by-nc-nd/4.0/

          Categories
          Geology
          QE1-996.5
          Paleontology
          QE701-760

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