| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Ptychoceratodus
Taxonomy
Ptychoceratodus was named by Jaekel (1926). Its type is Ceratodus serratus.
It was assigned to Ptychoceratodontinae by Apesteguia et al. (2007); to Ceratodontidae by Schultze (2004) and Apesteguía et al. (2012); to Ceratodontoidei by Skrzycki (2015); and to Ptychoceratodontidae by Martin (1982), Cuny and Ramboer (1991), Agnolin et al. (2017) and Panzeri (2023).
It was assigned to Ptychoceratodontinae by Apesteguia et al. (2007); to Ceratodontidae by Schultze (2004) and Apesteguía et al. (2012); to Ceratodontoidei by Skrzycki (2015); and to Ptychoceratodontidae by Martin (1982), Cuny and Ramboer (1991), Agnolin et al. (2017) and Panzeri (2023).
Synonymy list
| Year | Name and author |
|---|---|
| 1926 | Ptychoceratodus Jaekel |
| 1982 | Ptychoceratodus Martin p. 612 |
| 1991 | Ptychoceratodus Cuny and Ramboer p. 72 |
| 2004 | Ptychoceratodus Schultze p. 474 |
| 2007 | Ptychoceratodus Apesteguia et al. |
| 2012 | Ptychoceratodus Apesteguía et al. |
| 2015 | Ptychoceratodus Skrzycki p. 3 |
| 2017 | Ptychoceratodus Agnolin et al. |
| 2023 | Ptychoceratodus Panzeri p. 167 |
Is something missing? Join the Paleobiology Database and enter the data
|
|
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. †Ptychoceratodus Jaekel 1926
show all | hide all
†Ptychoceratodus acutus Priem 1924
†Ptychoceratodus cionei Apesteguia et al. 2007
†Ptychoceratodus concinnus Meyer and Plieninger 1844
†Ptychoceratodus cuyanus Agnolin et al. 2017
†Ptychoceratodus donensis Vorobyeva and Minikh 1968
†Ptychoceratodus gracilis Vorobyeva and Minikh 1968
†Ptychoceratodus ornatus Broom 1913
†Ptychoceratodus phillipsi Agassiz 1838
†Ptychoceratodus rectangulus Linck 1936
†Ptychoceratodus roemeri Skrzycki 2015
†Ptychoceratodus serratus Agassiz 1838
†Ptychoceratodus szechuanensis Young 1942
†Ptychoceratodus virapa Oldham 1859
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| P. Skrzycki 2015 | Dipnoan with massive skull having three single median bones and three mediolateral bones; E and C separated by an anterior fenestra; I and AB forming the posterior calvarium, but emarginated along the posterior edge; descending process of KLM having a single deep-angled slot for articulation with the ascending pterygopalatine process, which is covered laterally; no articulation between the ascending process and bones of the medial series; calvarial bones heavy and of even thickness throughout; ornament on calvarial bones absent; tooth plates triangular and high-crowned with wide pulp cavity; limited mantle dentine visible on occlusal surface; short radiating ridges originate anteriorly; five to six ridges on upper tooth plate, four
to six on lower; upper tooth plates close or contiguous in the midline, lower close; upper symphysis oblong, lower linear; ascending process of pterygopalatine bone originating above the second ridge of upper tooth plate or between second and third ridges; petrodentine absent. |
Measurements
No measurements are available
|
|
||||
|
|||||
|
|
||||
| Source: c = class, subp = subphylum | |||||
| References: Hendy et al. 2009, Carroll 1988 | |||||
Age range: base of the Katian to the top of the Early/Lower Maastrichtian or 453.00000 to 66.00000 Ma
Collections (17 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Katian | China | P. donensis (211602) | |
| Olenekian | Russian Federation (Volgograd) | Ceratodus donensis (27343) | |
| Olenekian | South Africa (Free State) | P. sp. (98617) | |
| Longobardian | Germany (Baden-Württemberg) | P. serratus (101873) | |
| Carnian | Argentina | P. cuyanus (123008) | |
| Carnian | Germany (Baden-Württemberg) | P. concinnus (106462) | |
| Carnian - Norian | Poland (Opole) | P. roemeri (61448) | |
| Norian | Thailand (Chaiyaphum) | Ceratodontidae indet. (89992) | |
| Norian | Germany (Baden-Württemberg) | Ceratodus concinnus (138865) | |
| Norian | France | P. rectangulus (117821) | |
| Rhaetian | France (Lorraine) | P. phillipsi (36106) | |
| Middle Jurassic | Thailand (Changwat Nakhon Si Thammarat) | Ferganoceratodus szechuanensis (137735) | |
| Tithonian | China (Sichuan) | Ceratodus szechuanensis (47076 159590) | |
| Albian | Niger (Agadez) | P. sp. (228823) | |
| Late/Upper Campanian - Early/Lower Maastrichtian | Argentina (Río Negro) | P. cionei (45087) | |
| Maastrichtian | Argentina (Chubut) | Ceratodus sp. (191131) |