Polygnathus
# Polygnathus

Polygnathus is an extinct genus of conodonts.

## Species

* †Polygnathus acrinodosus Aboussalam 2003
* †Polygnathus alkhovikovae Baranov, Slavík & Blodgett 2014
* †Polygnathus angustipennatus Bischoff and Ziegler 1957
* †Polygnathus aragonensis Martínez-Pérez & Valenzuela-Ríos 2014
* †Polygnathus arthuri Baranov, Slavík & Blodgett 2014
* †Polygnathus bardashevi Baranov, Slavík & Blodgett 2014
* †Polygnathus bicristatus Mossoni et al. 2015
* †Polygnathus burretti Savage 2013
* †Polygnathus chongqingensis Wang in Gong et al. 2012
* †Polygnathus carlsi Martínez-Pérez & Valenzuela-Ríos 2014
* †Polygnathus communis
   * †Polygnathus communis hanensis Savage 2013
   * †Polygnathus communis longanensis Qie et al. 2014
   * †Polygnathus communis namdipensis Savage 2013
   * †Polygnathus communis phaphaensis Savage 2013
* †Polygnathus costatus Klapper 1971
   * †Polygnathus costatus partitus
* †Polygnathus crassulus
   * †Polygnathus crassulus salapensis Savage 2013
* †Polygnathus damelei Vodrazkova et al. 2011
* †Polygnathus dujieensis Qie et al. 2014
* †Polygnathus efimovae Kononova et al. 1996
* †Polygnathus extralobatus phoensis Savage 2013
* †Polygnathus hemiansatus
* †Polygnathus hemipennatus Aboussalam 2003
* †Polygnathus hojedki Gholamalian et al. 2013
* †Polygnathus holynensis Vodrazkova et al. 2011
* †Polygnathus housei Aboussalam 2003
* †Polygnathus ivanowskyii Baranov, Slavík & Blodgett 2014
* †Polygnathus karsteni Baranov, Slavík & Blodgett 2014
* †Polygnathus kitabicus
* †Polygnathus lezhoevi Baranov, Slavík & Blodgett 2014
* †Polygnathus ilmenensis Zhuravlev 2003
* †Polygnathus linguiformis Hinde
* †Polygnathus michaelmurphyi Baranov, Slavík & Blodgett 2014
* †Polygnathus nuragicus Mossoni et al. 2015
* †Polygnathus pollocki Druce 1976
* †Polygnathus postvogesi Plotitsyn & Zhuravlev 2017
* †Polygnathus praeinversus Lu et al. 2018
* †Polygnathus pseudocommunis Wang et al. 2016
* †Polygnathus pseudocostatus Klapper & Vodrážková 2013
* †Polygnathus ramoni Martínez-Pérez & Valenzuela-Ríos 2014
* †Polygnathus robertensis Vodrazkova et al. 2011
* †Polygnathus rossicus Zhuravlev 2000
* †Polygnathus salixensis Vodrazkova et al. 2011
* †Polygnathus settedabanicus Baranov, Slavík & Blodgett 2014
* †Polygnathus sharyuensis Ovnatanova et al. 2019
* †Polygnathus varcus Stauffer 1940
* †Polygnathus wapanuckensis Harlton 1933
* †Polygnathus yakutensis Baranov, Slavík & Blodgett 2014

## Use in stratigraphy

The Tournaisian, the oldest age of the Mississippian (also known as Lower Carboniferous), contains eight conodont biozones, one of which is defined by a Polygnathus species:

* the zone of Gnathodus pseudosemiglaber and Scaliognathus anchoralis
* the zone of Gnathodus semiglaber and Polygnathus communis
* the zone of Dollymae bouckaerti
* the zone of Gnathodus typicus and Siphonodella isosticha
* the zone of Siphonodella quadruplicata and Patrognathus andersoni (upper zone of Patrognathus andersoni)
* the lower zone of Patrognathus andersoni
* the zone of Patrognathus variabilis
* the zone of Patrognathus crassus
