| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Dichotomites (Prodichotomites)
Taxonomy
Prodichotomites was named by Kemper (1971).
It was synonymized subjectively with Polyptychites by Bogomolov (1989); it was reranked as Dichotomites (Prodichotomites) by Alsen (2006).
It was assigned to Polyptychitinae by Jeletzky and Kemper (1988), Lukeneder (2004); and to Dichotomites by Alsen (2006).
It was synonymized subjectively with Polyptychites by Bogomolov (1989); it was reranked as Dichotomites (Prodichotomites) by Alsen (2006).
It was assigned to Polyptychitinae by Jeletzky and Kemper (1988), Lukeneder (2004); and to Dichotomites by Alsen (2006).
Subtaxa
Dichotomites (Prodichotomites) amundensis, Dichotomites (Prodichotomites) crassus, Dichotomites (Prodichotomites) ellefensis, Dichotomites (Prodichotomites) flexicosta (syn. Polyptychites gradatus, Neocraspedites speetonensis), Dichotomites (Prodichotomites) mackneyi, Dichotomites (Prodichotomites) polytomus (syn. Polyptychites ramulosus), Prodichotomites complanatus, Prodichotomites fissuratus, Prodichotomites glaber, Prodichotomites grotriani (syn. Olcostephanus obsoletecostatus), Prodichotomites ivanovi, Prodichotomites perovalis, Prodichotomites pfaffi, Prodichotomites robustus, Prodichotomites undulatus, Ringnesiceras (Ringnesiceras)
Species lacking formal opinion data
Synonyms
|
Synonymy list
| Year | Name and author |
|---|---|
| 1971 | Prodichotomites Kemper |
| 1979 | Ringnesiceras Kemper and Jeletzky p. 5 |
| 1988 | Prodichotomites Jeletzky and Kemper p. 130 |
| 1988 | Ringnesiceras Jeletzky and Kemper p. 198 |
| 2004 | Prodichotomites Lukeneder p. 51 |
| 2006 | Dichotomites (Prodichotomites) Alsen p. 113 |
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.
Subg. †Dichotomites (Prodichotomites) Kemper 1971
show all | hide all
†Dichotomites (Prodichotomites) amundensis Kemper and Jeletzky 1979
†Dichotomites (Prodichotomites) crassus Kemper 1978
†Dichotomites (Prodichotomites) ellefensis Kemper and Jeletzky 1979
†Dichotomites (Prodichotomites) flexicosta Koenen 1902
hide
Invalid names: Neocraspedites speetonensis Spath 1924 [synonym], Polyptychites gradatus Koenen 1902 [synonym]
†Dichotomites (Prodichotomites) mackneyi Alsen 2006
†Dichotomites (Prodichotomites) polytomus Koenen 1902
hide
Invalid names: Polyptychites ramulosus Koenen 1902 [synonym]
†Prodichotomites complanatus Koenen 1902
†Prodichotomites fissuratus Koenen 1902
†Prodichotomites glaber Jeletzky and Kemper 1988
†Prodichotomites grotriani Neumayr and Uhlig 1881
hide
Invalid names: Olcostephanus obsoletecostatus Neumayr and Uhlig 1881 [synonym]
†Prodichotomites ivanovi Aristov 1974
†Prodichotomites perovalis Koenen 1902
†Prodichotomites pfaffi Jeletzky and Kemper 1988
†Prodichotomites robustus Jeletzky and Kemper 1988
†Prodichotomites undulatus Koenen 1902
Invalid names: Ringnesiceras Kemper and Jeletzky 1979 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
|
|
||||
|
|
||||
|
|
||||
|
|
||||
| Source: o = order, c = class | |||||
| References: Kiessling 2004, Kiessling 2003 | |||||
Age range: Early/Lower Valanginian or 137.05000 to 132.60000 Ma
Collections (21 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Valanginian | Canada (Northwest Territories) | Ringnesiceras amundense (87554) | |
| Late/Upper Valanginian | Austria | Prodichotomites sp. (64831) | |
| Late/Upper Valanginian | Greenland | Dichotomites sp., Dichotomites crassus (83708) | |
| Late/Upper Valanginian | Poland (Gmina Tomaszów Mazowiecki) | Prodichotomites complanatus (192523 192524 192525 192526 192527 192528 192529 192530 192531 192532 192533) | |
| Late/Upper Valanginian | Russian Federation | Dichotomites polytomus (65459) | |
| Late/Upper Valanginian | Canada (Northwest Territories) | Ringnesiceras amundense (87552) | |
| Valanginian | Greenland | Dichotomites petschorensis (83712) | |
| Valanginian | Svalbard and Jan Mayen | Polyptychites perovalis (211954 212036) | |
| Valanginian | Poland | Craspedites complanatus (2081) Polyptychites gradatus (2097) |