Siphonodella Knowpia

Siphonodella; Temporal range: Late Devonian–Tournaisian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	†Conodonta
Genus:	†Siphonodella; Branson and Mehl 1944
Species
	†Siphonodella banraiensis; †Siphonodella carinata; †Siphonodella duplicata (type); †Siphonodella isosticha; †Siphonodella kalvodai; †Siphonodella nandongensis; †Siphonodella quadruplicata; †Siphonodella sulcata; †Siphonodella uralica;

Siphonodella is an extinct genus of conodonts.

Siphonodella banraiensis is from the Late Devonian of Thailand.^[4] Siphonodella nandongensis is from the Early Carboniferous of the Baping Formation in China.^[5]

Use in stratigraphy edit

The Tournaisian, the oldest age of the Mississippian (also known as Lower Carboniferous) contains eight conodont biozones, two of which are characterized by Siphonodella species:

the zone of Gnathodus typicus and Siphonodella isosticha
the zone of Siphonodella quadruplicata and Patrognathus andersoni (upper zone of Patrognathus andersoni)

The GSSP Golden Spike for the Tournaisian is in La Serre, Montagne Noire, France with the first appearance of Siphonodella sulcata. In 2006 it was discovered that this GSSP has biostratigraphic problems.

References edit

^ Conodonts. EB Branson and MG Mehl, in HW Shimer and RR Shrock, Index Fossils of North America. 1944
^ Andrey V. Zhuravlev (2017). "A new species of the conodont genus Siphonodella Branson & Mehl (late Tournaisian)". Estonian Journal of Earth Sciences. 66 (4): 188–192. doi:10.3176/earth.2017.15.
^ Sandra I. Kaiser; Tomáš Kumpan; Vojtěch Cígler (2017). "New unornamented siphonodellids (Conodonta) of the lower Tournaisian from the Rhenish Massif and Moravian Karst (Germany and Czech Republic)". Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen. 286 (1): 1–33. doi:10.1127/njgpa/2017/0684.
^ Late Devonian conodonts from northwestern Thailand. Norman M. Savage (2013). Bourland Printing / Trinity Press. pages 1–48, ISBN 978-0-578-11919-9
^ New material of the Early Carboniferous conodonts from the lower member of the Baping Formation in Nandong, Guangxi, China. Zhihong Li, Zhongqin Peng, Long Cheng, Chuanshang Wang and Baozhong Wang, Acta Micropalaeontologica Sinica, 2014, volume 31, issue 3, pages 271–284