The genus Koskinonodon was formerly named Buettneria by Case in 1922, but in 2007, B.D. Mueller realized that the name Buettneria had already been given to a bush cricket from the Republic of Congo by Karsch (1889), so he made the genus Koskinonodon the earliest available unpreoccupied name for the temnospondyl.
Lucas et al. (
2007), however, petitioned the ICZN to suppress Karsch's name in favor of Case's name, citing evidence that the amphibian name is much more well known and widely used (the authors cited 75 uses of the name in scientific literature and books over the last 85 years), and that the bush cricket name had been seldom used in technical literature.
However, ICZN Opinion 2255 issued in 2010 rejected the petition.

Known Koskinonodon fossils have been found in the United States, especially the Chinle Formation of Petrified Forest National Park and the Placerias Quarry in Arizona, the Garita Creek Formation of central New Mexico (the quarry at Lamy), the Petrified Forest Member of northern New Mexico, the Bluewater Creek Formation of western New Mexico, the New Oxford Formation of Pennsylvania, the Tecovas Formation of western Texas, and the Popo Agie Formation of the Chugwater Group of Wyoming.

Synonymy of Koskinonodon with Anaschisma started when Romer (1947) proposed that Anaschisma was a senior synonym of Buettneria, Koskinonodon, and Borborophagus.
This was followed by Gee et al. (
2019), where they redescribed the holotypes of the two nominal Anaschisma species, and then synonymized Koskinonodon, Buettneria and Borborophagus with Anaschisma.
The genus Koskinonodon was formerly named Buettneria by Case in 1922, but in 2007, B.D. Mueller realized that the name Buettneria had already been given to a bush cricket from the Republic of Congo by Karsch (1889), so he made the genus Koskinonodon the earliest available unpreoccupied name for the temnospondyl. Lucas et al. (2007), however, petitioned the ICZN to suppress Karsch's name in favor of Case's name, citing evidence that the amphibian name is much more well known and widely used (the authors cited 75 uses of the name in scientific literature and books over the last 85 years), and that the bush cricket name had been seldom used in technical literature. However, ICZN Opinion 2255 issued in 2010 rejected the petition.
Known Koskinonodon fossils have been found in the United States, especially the Chinle Formation of Petrified Forest National Park and the Placerias Quarry in Arizona, the Garita Creek Formation of central New Mexico (the quarry at Lamy), the Petrified Forest Member of northern New Mexico, the Bluewater Creek Formation of western New Mexico, the New Oxford Formation of Pennsylvania, the Tecovas Formation of western Texas, and the Popo Agie Formation of the Chugwater Group of Wyoming.
Synonymy of Koskinonodon with Anaschisma started when Romer (1947) proposed that Anaschisma was a senior synonym of Buettneria, Koskinonodon, and Borborophagus. This was followed by Gee et al. (2019), where they redescribed the holotypes of the two nominal Anaschisma species, and then synonymized Koskinonodon, Buettneria and Borborophagus with Anaschisma.
Anaschisma