Palmatolepis Explained

Palmatolepis is an extinct conodont genus in the family Palmatolepidae. It was the most abundant genus of conodonts of the Late Devonian, disappearing during the Devonian/Carboniferous crisis.^[1]

Species

• †Palmatolepis glabra
• †Palmatolepis hassi^[2]
• †Palmatolepis khaensis Savage 2013
• †Palmatolepis marki Savage 2013
• †Palmatolepis spallettae
• †Palmatolepis subperlobata
  • †Palmatolepis subperlobata lapoensis Savage 2013
• †Palmatolepis triangularis
• †Palmatolepis unicornis

Use in stratigraphy

The Famennian (372.2 ± 1.6 mya) is defined by a GSSP Golden Spike located at Coumiac quarry, Montagne Noire, France where there is a biologic abundant occurrence of Palmatolepis triangularis.

During that stage, a biologic event occurred (Upper Kellwasser Extinction of all Ancyrodella and Ozarkodina and most Palmatolepis, Polygnathus and Ancyrognathus.

References

• Morphological variation of Palmatolepis Devonian conodonts: species versus genus. Catherine Girard, Sabrina Renaud and Aurélie Sérayet, Comptes Rendus Palevol, Volume 3, Issue 1, January 2004, Pages 1–8, (article in French)
• Shape Analysis of Frasnian Species of the Late Devonian Conodont Genus Palmatolepis. Gilbert Klapper and C. T. Foster, Jr., Memoir (The Paleontological Society), Vol. 32, Supplement to Vol. 67, no. 4 of the Journal of Paleontology (Jul., 1993), pages 1–35 (Stable URL, retrieved 2 May 2016)

External links

• • Palmatolepis at fossilworks.org (retrieved 2 May 2016)

Notes and References

1. Disparity Changes in 370 Ma Devonian Fossils: The Signature of Ecological Dynamics? Girard C and Renaud S (2012), PLoS ONE, 7(4): e36230,
2. Locality and horizon: Upper part of the Grey Member, Ferques Formation, La Parisienne quarry (now flooded), Pas-de-Calais, France. Specimen from lowermost Ag. triangularis Conodont Zone, equivalent to late Palmatolepis hassi Zone (ca. 373 Ma, Frasnian).