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Hypengonoceras
Taxonomy
Hypengonoceras was named by Spath (1922) [Sepkoski's age data: K Albi-u]. Its type is Placenticeras warthi.
It was assigned to Placenticeratidae by Wright (1952), Förster (1975); to Engonoceratidae by Klinger and Kennedy (1989), Wright et al. (1996); to Ammonoidea by Sepkoski (2002); and to Knemiceratidae by Bulot (2010).
It was assigned to Placenticeratidae by Wright (1952), Förster (1975); to Engonoceratidae by Klinger and Kennedy (1989), Wright et al. (1996); to Ammonoidea by Sepkoski (2002); and to Knemiceratidae by Bulot (2010).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1922 | Hypengonoceras Spath p. 112 |
| 1952 | Hypengonoceras Wright |
| 1975 | Hypengonoceras Förster p. 216 |
| 1989 | Hypengonoceras Klinger and Kennedy p. 361 |
| 1996 | Hypengonoceras Wright et al. p. 130 |
| 2002 | Hypengonoceras Sepkoski |
| 2010 | Hypengonoceras Bulot |
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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. †Hypengonoceras Spath 1922
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†Hypengonoceras chouberti Collignon 1966
†Hypengonoceras decaryi Collignon 1963
†Hypengonoceras fauremuretae Collignon 1966
†Hypengonoceras tarfayense Collignon 1966
†Hypengonoceras warthi Kossmat 1895
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | |||||
|---|---|---|---|---|---|---|---|
| shell height | 1 | 57.0 | |||||
| shell diameter | 1 | 110.0 | |||||
| shell inflation | 1 | 8.00 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Kiessling 2003 | |||||
Age range: Late/Upper Albian or 106.30000 to 100.50000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Albian | Madagascar (Antsiranana) | H. decaryi (86507) | |
| Late/Upper Albian | Mozambique | H. decaryi (174617) | |
| Late/Upper Albian | South Africa | H. decaryi (82459) |