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Metaceratodus
Taxonomy
Metaceratodus was named by Chapman (1914).
It was assigned to Neoceratodontidae by Apesteguia et al. (2007); to Ceratodontoidei by Czepiński et al. (2021); and to Ceratodontidae by Schultze (2004), Previtera and González Riga (2008), Cione and Gouiric-Cavalli (2012), Louys and Price (2015), Panzeri et al. (2020), Panzeri (2023), Agnolin et al. (2025).
It was assigned to Neoceratodontidae by Apesteguia et al. (2007); to Ceratodontoidei by Czepiński et al. (2021); and to Ceratodontidae by Schultze (2004), Previtera and González Riga (2008), Cione and Gouiric-Cavalli (2012), Louys and Price (2015), Panzeri et al. (2020), Panzeri (2023), Agnolin et al. (2025).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1914 | Metaceratodus Chapman |
| 2004 | Metaceratodus Schultze p. 474 |
| 2007 | Metaceratodus Apesteguia et al. |
| 2008 | Metaceratodus Previtera and González Riga p. 354 |
| 2012 | Metaceratodus Cione and Gouiric-Cavalli p. 205 |
| 2015 | Metaceratodus Louys and Price p. 553 |
| 2020 | Metaceratodus Panzeri et al. p. 4–5 |
| 2021 | Metaceratodus Czepiński et al. |
| 2023 | Metaceratodus Panzeri |
| 2025 | Metaceratodus Agnolin et al. p. 226 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
G. †Metaceratodus Chapman 1914
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†Metaceratodus baibianorum Panzeri et al. 2020
†Metaceratodus bonei Kemp 1997
†Metaceratodus ellioti Kemp 1997
†Metaceratodus kaopen Apesteguia et al. 2007
†Metaceratodus palmeri Krefft 1874
†Metaceratodus wichmanni Apesteguía and Agnolin 2007
†Metaceratodus wollastoni Chapman 1914
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| K. M. Panzeri et al. 2020 | Modified slightly from Kemp (1997a): wide pulp cavity, ridges originating medially, all ridges robust; first ridge obtuse or acute in pterygopalatine plates, acute in prearticular tooth plates; remaining ridges acute; pterygopalatine tooth plates close or contiguous, prearticular tooth plates extensively separated; upper symphysis oblong or elliptical, lower symphysis oblong; distinctive parasphenoid groove; pterygopalatine process present; double prearticular groove; occlusal pits present. | |
| K. M. Panzeri 2023 | Cavidad pulpar ancha. Dentina del manto limitada. Crestas que se originan medialmente y todas las denticulaciones son robustas. La primera denticulación obtusa o aguda en placas pterigopalatinas y la primera denticulación aguda en placas prearticulares; denticulaciones restantes con ápices agudos. Placas pterigopalatinas cercanas o contiguas y placas prearticulares muy separadas. Sínfisis superior oblonga o elíptica y sínfisis inferior oblonga. Surco del paraesfenoides notorio. Proceso ascendente del pterigopalatino presente (a nivel de la segunda denticulación). Surco prearticular dividido. Puntuaciones simples y patrón de desgaste producto de la oclusión. |
Measurements
No measurements are available
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| Source: c = class, subp = subphylum | |||||
| References: Carroll 1988, Kiessling 2004, Hendy et al. 2009 | |||||
Age range: base of the Norian to the top of the Maastrichtian or 227.30000 to 66.00000 Ma
Collections (9 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Norian | Poland (Opole) | M. sp. (140077) | |
| Cenomanian - Early/Lower Turonian | Australia (Queensland) | M. ellioti (226547) | |
| Santonian | Argentina (Río Negro) | Ceratodus kaopen (84309) | |
| Late/Upper Campanian - Early/Lower Maastrichtian | Argentina (Mendoza) | Ceratodus sp. (185024) M. sp. (85081) | |
| Late/Upper Campanian - Early/Lower Maastrichtian | Argentina (Río Negro) | Ptychoceratodus wichmanni (45087) | |
| Maastrichtian | Argentina (Chubut) | M. baibanorum (99438 208435 216698) |