| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Placenticeras
Taxonomy
Placenticeras was named by Meek (1876) [Sepkoski's age data: K Ceno-l K Maes]. Its type is Ammonites placenta.
It was assigned to Ammonoidea by Sepkoski (2002); and to Placenticeratidae by Wiedmann (1978), Summesberger (1979), Cobban and Hook (1983), Kennedy (1984), Klinger and Kennedy (1989), Kennedy and Cobban (1991), Matsumoto and Skwarko (1991), Cobban and Kennedy (1992), Kennedy and Cobban (1993), Kennedy and Cobban (1994), Kennedy (1995), Kennedy and Kaplan (1995), Kennedy et al. (1997), Kennedy et al. (2001), Szives (2007), Kennedy et al. (2008), Mosavinia et al. (2014), Kennedy and Gale (2016), Kennedy (2018).
It was assigned to Ammonoidea by Sepkoski (2002); and to Placenticeratidae by Wiedmann (1978), Summesberger (1979), Cobban and Hook (1983), Kennedy (1984), Klinger and Kennedy (1989), Kennedy and Cobban (1991), Matsumoto and Skwarko (1991), Cobban and Kennedy (1992), Kennedy and Cobban (1993), Kennedy and Cobban (1994), Kennedy (1995), Kennedy and Kaplan (1995), Kennedy et al. (1997), Kennedy et al. (2001), Szives (2007), Kennedy et al. (2008), Mosavinia et al. (2014), Kennedy and Gale (2016), Kennedy (2018).
Species
P. benningi, P. bidorsatum (syn. Diplacomoceras canaliculatum, Ammonites dujardin), P. cumminsi, P. fritschi, P. intercalare, P. kaffrarium (syn. P. umkwelanensis), P. kolbajense, P. maherndli, P. mediasiaticum (syn. Turkmenites gissarensis), P. memoriaschloenbachi, P. orbignyanum, P. paraplanum, P. placenta, P. polyopsis, P. pseudoplacenta, P. semiornatum, P. syrtale (syn. P. intermedium, P. rotundatum, Ammonites guadalupae, Stantonoceras pseudocostatum, P. sancarlosense, P. planum, P. newberryi), P. tamulicum, P. vancouverense, P. vredenburgi, P. whitfieldi
Species lacking formal opinion data
Synonyms
|
Synonymy list
| Year | Name and author |
|---|---|
| 1876 | Placenticeras Meek |
| 1900 | Diplacomoceras Hyatt p. 585 |
| 1978 | Placenticeras Wiedmann p. 666 |
| 1979 | Placenticeras Summesberger p. 152 |
| 1983 | Placenticeras Cobban and Hook p. 8 |
| 1984 | Placenticeras Kennedy p. 38 |
| 1989 | Placenticeras Klinger and Kennedy p. 266 |
| 1991 | Placenticeras Kennedy and Cobban p. 175 |
| 1991 | Placenticeras Matsumoto and Skwarko p. 249 |
| 1992 | Placenticeras Cobban and Kennedy p. 73 |
| 1993 | Placenticeras Kennedy and Cobban p. 834 |
| 1994 | Placenticeras Kennedy and Cobban p. 1288 |
| 1995 | Placenticeras Kennedy p. 410 |
| 1995 | Placenticeras Kennedy and Kaplan p. 28 |
| 1997 | Placenticeras Kennedy et al. p. 4 |
| 2001 | Placenticeras Kennedy et al. p. 4 |
| 2002 | Diplacomoceras Sepkoski |
| 2002 | Karamaiceras Sepkoski |
| 2002 | Placenticeras Sepkoski |
| 2002 | Pseudoplacenticeras Sepkoski |
| 2007 | Placenticeras Szives p. 124 |
| 2008 | Placenticeras Kennedy et al. p. 125 |
| 2014 | Placenticeras Mosavinia et al. p. 82 |
| 2016 | Placenticeras Kennedy and Gale p. 269 |
| 2018 | Placenticeras Kennedy p. 678 |
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. †Placenticeras Meek 1876
show all | hide all
†Placenticeras benningi Stephenson 1956
†Placenticeras bidorsatum Roemer 1841
+
Invalid names: Ammonites dujardin Schluter 1867 [synonym], Diplacomoceras canaliculatum Hyatt 1903 [synonym]
†Placenticeras cumminsi Cragin 1893
†Placenticeras fritschi de Grossouvre 1894
†Placenticeras intercalare Meek and Hayden 1860
†Placenticeras kaffrarium Etheridge 1904
+
Invalid names: Placenticeras umkwelanensis Etheridge 1904 [synonym]
†Placenticeras kolbajense Sokolov 1967
†Placenticeras maherndli Summesberger 1979
†Placenticeras mediasiaticum Luppov 1963
+
Invalid names: Turkmenites gissarensis Ilyin 1975 [synonym]
†Placenticeras memoriaschloenbachi Laube and Bruder 1887
†Placenticeras orbignyanum Geinitz 1849
†Placenticeras paraplanum Wiedmann 1978
†Placenticeras placenta DeKay 1828
†Placenticeras polyopsis Dujardin 1837
†Placenticeras pseudoplacenta Hyatt 1903
†Placenticeras semiornatum d'Orbigny 1850
†Placenticeras syrtale Morton 1834
+
Invalid names: Ammonites guadalupae Roemer 1849 [synonym], Placenticeras intermedium Johnson 1903 [synonym], Placenticeras newberryi Hyatt 1903 [synonym], Placenticeras planum Hyatt 1903 [synonym], Placenticeras rotundatum Johnson 1903 [synonym], Placenticeras sancarlosense Hyatt 1903 [synonym], Stantonoceras pseudocostatum Johnson et al. 1964 [synonym]
†Placenticeras tamulicum Blanford 1862
†Placenticeras vancouverense Meek 1861
†Placenticeras vredenburgi Sarkar 1966
†Placenticeras whitfieldi Hyatt 1903
Invalid names: Diplacomoceras Hyatt 1900 [synonym], Karamaiceras [synonym], Pseudoplacenticeras [synonym]
Diagnosis
No diagnoses are available