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Palaeoechioceras
Taxonomy
Palaeoechioceras was named by Spath (1929).
It was synonymized subjectively with Echioceras by Bremer (1965).
It was assigned to Echioceratidae by Geczy and Meister (2007), Howarth (2013).
It was synonymized subjectively with Echioceras by Bremer (1965).
It was assigned to Echioceratidae by Geczy and Meister (2007), Howarth (2013).
Species
Species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1927 | Protechioceras Trueman and Williams |
| 1929 | Palaeoechioceras Spath |
| 1956 | Hypechioceras Spath |
| 2007 | Palaeoechioceras Geczy and Meister |
| 2013 | Palaeoechioceras Howarth p. 29 |
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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. †Palaeoechioceras Spath 1929
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†Palaeoechioceras spirale Trueman and Williams 1927
†Palaeoechioceras suemegensis Geczy and Meister 2007
Invalid names: Hypechioceras Spath 1956 [synonym], Protechioceras Trueman and Williams 1927 [replaced]
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | |||||
|---|---|---|---|---|---|---|---|
| shell height | 1 | 14.0 | |||||
| shell diameter | 1 | 105.0 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: base of the Obtusum to the top of the Early/Lower Pliensbachian or 199.50000 to 184.20000 Ma
Collections (19 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Sinemurian | Morocco | P. pierrei (200508 200513 200515 200610 200611) P. sp. (200474 200475 200582) | |
| Late/Upper Sinemurian | Mexico (Sonora) | P. sp. (208257) | |
| Obtusum | Hungary (Veszprém Megye) | Protechioceras formosum (78209) | |
| Oxynotum | United Kingdom (Somerset) | P. spirale (159471 159472 159473 159474 159476) | |
| Oxynotum - Raricostatum | Hungary (Veszprém Megye) | P. suemegensis (81576) | |
| Raricostatum | United Kingdom (Somerset) | P. spirale (159479) P. typus, P. spirale (159478) | |
| Early/Lower Pliensbachian | Mexico (Sonora) | P. sp. (208260) |