Evolutionary Process from <i>Mockina bidentata</i> to <i>Parvigondolella andrusovi</i>: Evidence from the Pizzo Mondello Section, Sicily, Italy

Yixing Du; Tetsuji Onoue; Viktor Karádi; Ian S. Williams; Manuel Rigo

doi:10.1007/s12583-020-1362-2

Volume 32 Issue 3

Jun 2021

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Journal of Earth Science > 2021 > 32(3): 667-676.

Yixing Du, Tetsuji Onoue, Viktor Karádi, Ian S. Williams, Manuel Rigo. Evolutionary Process from Mockina bidentata to Parvigondolella andrusovi: Evidence from the Pizzo Mondello Section, Sicily, Italy. Journal of Earth Science, 2021, 32(3): 667-676. doi: 10.1007/s12583-020-1362-2

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Yixing Du, Tetsuji Onoue, Viktor Karádi, Ian S. Williams, Manuel Rigo. Evolutionary Process from Mockina bidentata to Parvigondolella andrusovi: Evidence from the Pizzo Mondello Section, Sicily, Italy. Journal of Earth Science, 2021, 32(3): 667-676. doi: 10.1007/s12583-020-1362-2

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Evolutionary Process from Mockina bidentata to Parvigondolella andrusovi: Evidence from the Pizzo Mondello Section, Sicily, Italy

doi: 10.1007/s12583-020-1362-2

1.
Department of Geosciences, University of Padova, 35131 Padova, Italy
2.
Department of Earth and Planetary Sciences, Kyushu University, Fukuoka, Japan
3.
Department of Palaeontology, Eötvös Loránd University, Budapest 1117, Hungary
4.
Research School of Earth Sciences, The Australian National University, ACT 2601 Canberra, Australia
5.
Institute of Geosciences and Earth Resources, National Research Council of Italy, 35131 Padova, Italy

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Corresponding author: Yixing Du, yixing.du@outlook.com
Received Date: 15 Jun 2020
Accepted Date: 29 Oct 2020
Publish Date: 01 Jun 2021

Abstract

Abstract

During their last phase of evolution, the pectiniform conodont elements manifested an evident trend of simplification and miniaturization. This phase started from the late Norian (Sevatian) in the Late Triassic and the evolutionary process of genus Mockina to Parvigondolella, in particular between Mockina bidentata and Parvigondolella andrusovi, is one of the most significant examples. Parvigondolella has been reported worldwide since it was first described in the early 1970s. However, it has recently been suggested that genus Parvigondolella is an ecostratigraphic morphotype of genus Mockina, and thus a phenotype controlled by the environmental conditions, and not an independent taxon. In the Pizzo Mondello Section (Sicily, Italy), transitional forms between M. bidentata and P. andrusovi have been found at different evolutionary stages. We have investigated the oceanic conditions at the time by using redox-sensitive elements (Mn, Fe, V, Cr, and Ni) and seawater temperatures from biogenetic δ¹⁸O_phos to understand the possible environmental influences on the phylogenetic evolution between Mockina and Parvigondolella. T he geochemical and isotope analyses indicate that the redox condition and temperature were stable during the evolution of genus Parvigondolella in Pizzo Mondello, confirming that genus Parvigondolella is a real taxon and not a phenotype. A new conodont species named Parvigondolella ciarapicae n. sp. is described here for the first time.
- conodont,
- Late Triassic,
- evolution,
- oxygen isotope,
- geochemistry

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Evolutionary Process from Mockina bidentata to Parvigondolella andrusovi: Evidence from the Pizzo Mondello Section, Sicily, Italy

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