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Plesiacanthoceratoides
Taxonomy
Plesiacanthoceratoides was named by Kennedy (1990) [Sepkoski's age data: K Ceno-m K Ceno-u Sepkoski's reference number: 901]. Its type is Plesiacanthoceratoides vetula.
It was assigned to Acanthoceratinae by Kennedy and Cobban (1990) and Wright et al. (1996).
It was assigned to Acanthoceratinae by Kennedy and Cobban (1990) and Wright et al. (1996).
Species
P. vetula (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 1990 | Plesiacanthoceratoides Kennedy p. 158 |
| 1990 | Plesiacanthoceratoides Kennedy and Cobban pp. 75-154 figs. Plate 9, figures 1-25, 28; Text figure 24E |
| 1996 | Plesiacanthoceratoides Wright et al. p. 158 |
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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. †Plesiacanthoceratoides Kennedy 1990
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†Plesiacanthoceratoides vetula Cobban 1987
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. W. Wright et al. 1996 | Progenetic dwarf derivative of Plesiacanthoceras; homeomorph of Protacanthoceras. Constrictions present or not |
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Kiessling 2003 | |||||
Age range: Middle Cenomanian or 99.60000 to 93.50000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Cenomanian | USA (Montana) | P. alzadense (175422) | |
| Middle Cenomanian | USA (Texas) | P. vetula (198573) |