Didemnoides Bonet y Benveniste-Velasquez (didemnid ascidian spicules) in the Tithonian–lower Berriasian of the Neuquén Basin and its sequence stratigraphic significance

Main Article Content

Diego A. Kietzmann

Abstract

In this work, specimens of the genus Didemnoides Bonet and Benveniste-Velásquez are described from different sections of the Tithonian-Berriasian interval of the Neuquén Basin (Vaca Muerta Formation). Didemnoides has been interpreted as spicules of ascidians related to the family Didemnidae Giard, so this record represents the first documentation of tunicates for the Tithonian – Berriasian of the Neuquén Basin. The presence of spicules of didemnid ascidians allow to infer the development of hard substrates, high availability of nutrients, low water turbidity and low fresh water influx. The location of the Didemnoides-bearing levels within the sequence stratigraphic framework of the Vaca Muerta Formation evidences its development during transgressive system tracts, where these conditions prevail.

Article Details

How to Cite
Kietzmann, D. A. (2024). Didemnoides Bonet y Benveniste-Velasquez (didemnid ascidian spicules) in the Tithonian–lower Berriasian of the Neuquén Basin and its sequence stratigraphic significance. Revista De La Asociación Geológica Argentina, 81(3). Retrieved from https://revista.geologica.org.ar/raga/article/view/1790
Section
Articles

Most read articles by the same author(s)