Euconcordia nom. nov., a replacement name for the captorhinid eureptile Concordia Müller and Reisz, 2005 (non Kingsley, 1880), with new data on its dentition.

Abstract

The oldest known captorhinid reptile, and the only Carboniferous representative of this important clade of early eureptiles was named Concordia cunninghami. This was done on the basis of the cranial material from two specimens, but the name is preoccupied by an extant hippolytid crustacean. We therefore coined the new combination, Euconcordia, as a replacement name for this taxon. In addition, the recent significant increases in our understanding of dental anatomy in early amniotes in general, and captorhinid reptiles in particular, has allowed us to reinterpret the anatomy of the marginal and palatal teeth of this taxon.

Thecodont tooth attachment and replacement in bolosaurid parareptiles

“…This suggests that new teeth formed in a sequential pattern from anterior to posterior in Be. chengi, unlike the alternating replacement waves that characterize most reptilian dentitions (Gordon Edmund, Edmund & Museum, 1960;Reisz, Haridy & Müller, 2016). The thickness of their enamel also gives an indication of their age, indicating that the more posterior replacement teeth along the dentary were less developed than those in the front of the dentary.…”

“…Occasionally as in the holotype, crowns may be damaged, but part of the crown and the roots of the teeth are still present. Uninterrupted marginal tooth rows in the fossil record of Paleozoic tetrapods are rare, usually associated with unusual attachment and replacement cycles, such as in captorhinids (Bolt & DeMar, 1983;Reisz, Haridy & Müller, 2016). Parareptiles typically exhibit polyphyodonty with nearly continual tooth replacement cycles, producing frequent gaps along the tooth row (Gordon Edmund, Edmund & Museum, 1960;Macdougall & Modesto, 2011).…”

A redescription of Orovenator mayorum (Sauropsida, Diapsida) using high‐resolution μCT, and the consequences for early amniote phylogeny

“…the captorhinid Euconcordia , Müller & Reisz ; Reisz et al . ; the synapsid Archaeovenator , Reisz & Dilkes ; the diapsids Petrolacosaurus , Reisz ; and Prolacerta , Camp ; and the parareptile Delorhynchus , Reisz et al . ).…”

A New Captorhinid From the Permian Cave System Near Richards Spur, Oklahoma, and the Taxic Diversity of Captorhinus at This Locality

“…Captorhinids do extend into the Carboniferous, as evidenced by the late Carboniferous basal captorhinid from Kansas, Euconcordia cunninghami (Müller and Reisz, 2005;Reisz et al, 2016). However, no other Carboniferous material can be referred to the clade.…”