A new Byronia species from the Late Ordovician of Estonia

A new species of a possible thecate scyphozoan Byronia jaegeri sp. nov. is described from the late Katian of Estonia. This new taxon is distinct as it lacks the longitudinal ornamentation present in other Byronia species. Phosphanullus is a phosphatic attachment disk, which has been considered to be...

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Published inEstonian journal of earth sciences Vol. 65; no. 4; pp. 201 - 206
Main Authors Vinn, Olev, Kirsimäe, Kalle, Parry, Luke A., Toom, Ursula
Format Journal Article
LanguageEnglish
Published Tallinn Teaduste Akadeemia Kirjastus (Estonian Academy Publishers) 20.12.2016
Estonian Academy Publishers
Subjects
Baltica
Cnidaria
microstructure
Ordovician
Scyphozoa
tube composition
Estonia
Online AccessGet full text
ISSN1736-4728
1736-7913
1406-0132
1736-7557
1736-7557
DOI10.3176/earth.2016.17

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Abstract A new species of a possible thecate scyphozoan Byronia jaegeri sp. nov. is described from the late Katian of Estonia. This new taxon is distinct as it lacks the longitudinal ornamentation present in other Byronia species. Phosphanullus is a phosphatic attachment disk, which has been considered to be a junior synonym of Byronia. We report qualitative energy dispersive analysis and scanning electron microscopy of the composition of B. jaegeri, demonstrating that the tube is organic in composition and has a lamellar microstructure. The compositional differences of Phosphanullus and Byronia do not support their synonymy. It is likely that Phosphanullus belongs to a closely related but distinct phosphatic group of thecate scyphozoans, due to their morphological similarity, but differing composition.
AbstractList A new species of a possible thecate scyphozoan Byronia jaegeri sp. nov. is described from the late Katian of Estonia. This new taxon is distinct as it lacks the longitudinal ornamentation present in other Byronia species. Phosphanullus is a phosphatic attachment disk, which has been considered to be a junior synonym of Byronia. We report qualitative energy dispersive analysis and scanning electron microscopy of the composition of B. jaegeri, demonstrating that the tube is organic in composition and has a lamellar microstructure. The compositional differences of Phosphanullus and Byronia do not support their synonymy. It is likely that Phosphanullus belongs to a closely related but distinct phosphatic group of thecate scyphozoans, due to their morphological similarity, but differing composition.
Author Kirsimäe, Kalle
Toom, Ursula
Vinn, Olev
Parry, Luke A.
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Snippet A new species of a possible thecate scyphozoan Byronia jaegeri sp. nov. is described from the late Katian of Estonia. This new taxon is distinct as it lacks...
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SubjectTerms Baltica
Cnidaria
microstructure
Ordovician
Scyphozoa
tube composition
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