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Meioceras
Taxonomy
Meioceras was named by Carpenter (1858) [Sepkoski's age data: T Eo R]. It is extant.
It was reranked as Caecum (Meioceras) by Pilsbry (1922).
It was assigned to Caecum by Pilsbry (1922); to Caecidae by Woodring (1959), Perrilliat (1972), Todd (2001); and to Neotaenioglossa by Sepkoski (2002).
It was reranked as Caecum (Meioceras) by Pilsbry (1922).
It was assigned to Caecum by Pilsbry (1922); to Caecidae by Woodring (1959), Perrilliat (1972), Todd (2001); and to Neotaenioglossa by Sepkoski (2002).
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1858 | Meioceras Carpenter p. 438 |
| 1922 | Caecum (Meioceras) Pilsbry p. 378 |
| 1959 | Meioceras Woodring pp. 161-162 |
| 1972 | Meioceras Perrilliat p. 35 |
| 2001 | Meioceras Todd |
| 2002 | Meioceras Sepkoski |
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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. Meioceras Carpenter 1858
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†Meioceras ambyloceras Woodring 1959
†Meioceras constrictum Gabb 1873
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Hendy et al. 2009, Kiessling 2004 | |||||
Age range
Maximum range based only on fossils: base of the Danian to the top of the Late/Upper Pleistocene or 66.00000 to 0.01170 Ma
Minimum age of oldest fossil (stem group age): 61.66 Ma
Minimum age of oldest fossil (stem group age): 61.66 Ma
Collections (23 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Danian | USA (Texas) | Caecum texanum (205466) | |
| Lutetian | USA (Texas) | Caecum sp. (205532) | |
| Tortonian | Panama (Colon) | M. amblyoceras (145255) | |
| Tortonian | Panama | M. sp. (61342 136016) | |
| Messinian | Panama (Colon) | M. sp. (79855) | |
| Zanclean | Panama (Bocas del Toro) | M. sp. (79777 79982) | |
| Late/Upper Pliocene | Mexico (Veracruz) | M. constrictum (134768 134769) | |
| Late/Upper Pliocene | Mexico | M. constrictum (77713 77714) | |
| Late/Upper Pliocene | Jamaica | M. apanium (58522) | |
| Late/Upper Pliocene | USA (Florida) | M. nitidum, M. cingulatum (59484) | |
| Piacenzian | Panama (Bocas) | M. sp. (61343 79774) | |
| Piacenzian | Panama (Bocas del Toro) | M. sp. (61339 61340 61344) | |
| Early/Lower Pleistocene | USA (Florida) | M. cingulatum (41718) M. nitidum, M. cingulatum (79331) M. sp. a, M. cingulatum (41501) | |
| Late/Upper Pleistocene | USA (Florida) | M. nitidum (96538) |