| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Atlantoceratodus iheringi
Taxonomy
Ceratodus iheringi was named by Ameghino (1906). It is not extant. Its type specimen is MLP 21-967, a tooth (left upper tooth plate). Its type locality is Par-Aik, Río Sehuen, which is in a Cenomanian terrestrial sandstone in the Mata Amarilla Formation of Argentina.
It was recombined as Ameghinoceratodus iheringi by Apesteguia et al. (2007); it was recombined as Atlantoceratodus iheringi by Cione et al. (2007), Panzeri (2023), Agnolín et al. (2023).
It was recombined as Ameghinoceratodus iheringi by Apesteguia et al. (2007); it was recombined as Atlantoceratodus iheringi by Cione et al. (2007), Panzeri (2023), Agnolín et al. (2023).
Synonymy list
| Year | Name and author |
|---|---|
| 1906 | Ceratodus iheringi Ameghino |
| 1987 | Ceratodus iheringi Cione |
| 2004 | Ceratodus iheringi Schultze p. 489 |
| 2007 | Ameghinoceratodus iheringi Apesteguia et al. p. 29 |
| 2007 | Atlantoceratodus iheringi Cione et al. p. 8 |
| 2023 | Atlantoceratodus iheringi Agnolín et al. |
| 2023 | Atlantoceratodus iheringi Panzeri p. 155 |
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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.
†Atlantoceratodus iheringi Ameghino 1906
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. L. Cione et al. 2007 | (based only on tooth plates). Atlantoceratodus iheringi differs from the other species, A. madagascariensis in the smaller size (less than 25mm); the mediolingual keel absent; the lingual edge straight; deeper clefts that originate more medially and appear to be higher; the inner angle larger (usually 130o) | |
| K. M. Panzeri 2023 | Placas dentarias que alcanzan un tamaño pequeño a medio (1,61 cm de borde medial y 1,35 cm de borde lingual). Placas pterigopalatinas con cinco denticulaciones y prearticulares con cuatro. Denticulaciones de base levemente angosta con ápices redondeados y hendiduras decrecen en profundidad anterocaudalmente. Patrón de desgaste en vida escaso y sobre surcos y borde mediolingual. Borde medial es más largo que el lingual, en placas pterigopalatinas igualmente curvos y en prearticulares tendiendo a rectos. Borde lingual de las placas dentarias pterigopalatinas forma un ángulo levemente obtuso con el plano sagital. Bisectriz del ángulo interno situado a nivel de la segunda denticulación en las placas dentarias pterigopalatinas, y a nivel de la primera hendidura en las placas dentarias prearticulares. Primera denticulación de las placas dentarias pterigopalatinas delgada, dirigida anterolabialmente, sin faceta anterior y ligeramente curvada posteriormente. Primera denticulación de las placas dentarias prearticulares recta y delgada. Quinta y cuarta denticulación de longitud y anchura similares en placas pterigopalatinas; quinta cresta en las placas dentarias pterigopalatinas implicada en la formación del escalón; cuarta cresta en las placas dentarias prearticulares formando el espolón. Sínfisis pterigopalatina más larga que ancha y homogénea en espesor, convexa dorsalmente y plana ventralmente. Capa de dentina circundenteonal doble (externa monorrefringente). Placas dentarias con crecimiento isométrico. |
Measurements
No measurements are available
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| Source: c = class, subp = subphylum | |||||
| References: Hendy et al. 2009, Carroll 1988 | |||||
Age range: base of the Cenomanian to the top of the Campanian or 100.50000 to 72.20000 Ma
Collections (6 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Cenomanian | Argentina (Santa Cruz) | Ceratodus iheringi (49095) | |
| Coniacian | Argentina (Santa Cruz) | Atlantoceratodus iheringi (210976 210977) | |
| Campanian | Argentina (Santa Cruz) | Atlantoceratodus iheringi (237047) Ceratodus iheringi (191154) | |
| Late/Upper Campanian - Early/Lower Maastrichtian | Argentina (Río Negro) | Ceratodus iheringi (45087) |