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First record of late Eocene ascidians (Ascidiacea, Tunicata) from southeastern Australia

Magdalena Lukowiak
First record of late Eocene ascidians (Ascidiacea, Tunicata) from southeastern Australia
Journal of Paleontology (May 2012) 86 (3): 521-526

Abstract

Ascidian spicules are reported for the first time from the upper Eocene (Paleogene) biosiliceous marls and mudstones of the Blanche Point Formation in the St. Vincent Basin, southeastern Australia. The spicules that belong to the family Polycitoridae are identified as a Recent species Cystodytes cf. dellechiajei, and Cystodytes sp. and spicules of the family Didemnidae are indentified as representing genera Lissoclinum, Didemnum, and Polysyncraton. Five other different morphological spicule types which can be classified only at the family level also belong to the Didemnidae. This study demonstrates that ascidians had a very wide distribution by the late Eocene and that ascidian fauna was already of a modern character.


ISSN: 0022-3360
EISSN: 1937-2337
Coden: JPALAZ
Serial Title: Journal of Paleontology
Serial Volume: 86
Serial Issue: 3
Title: First record of late Eocene ascidians (Ascidiacea, Tunicata) from southeastern Australia
Author(s): Lukowiak, Magdalena
Affiliation: Polish Academy of Sciences, Institute of Paleobiology, Warsaw, Poland
Pages: 521-526
Published: 201205
Text Language: English
Publisher: Paleontological Society, Lawrence, KS, United States
References: 54
Accession Number: 2012-056739
Categories: Vertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: strat. col., 1 plate, sketch map
S35°08'60" - S35°08'60", E138°28'00" - E138°28'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, The Paleontological Society. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201229
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