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Ophiceras medium
Taxonomy
Ophiceras medium was named by Griesbach (1880). It is a 3D body fossil. Its type locality is Shalshal Cliff, Bed 2, Rimkin Paiar, which is in a Griesbachian offshore limestone in India.
Subspecies
Sister species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1880 | Ophiceras medium Griesbach p. 111 figs. Pl 3, fig 9 |
| 1897 | Ophiceras chamunda Diener |
| 1897 | Ophiceras medium Diener |
| 1897 | Ophiceras platyspira Diener |
| 1897 | Ophiceras ptychodes Diener |
| 1897 | Ophiceras sakuntala Diener |
| 1933 | Ophiceras tingi Tien |
| 1934 | Lytophiceras chamunda Spath |
| 1934 | Lytophiceras ptychodes Spath |
| 1934 | Lytophiceras sakuntala Spath |
| 1934 | Ophiceras platyspira Spath |
| 1974 | Ophiceras (Lytophiceras) ptychodes Kapoor and Bando |
| 2018 | Ophiceras sakuntala Ware and Bucher |
| 2019 | Ophiceras medium Dai et al. p. 51 figs. 4.1-4.11 |
| 2023 | Ophiceras medium Dai et al. fig. 12A |
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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.
†Ophiceras medium Griesbach 1880
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†Lytophiceras chamunda evoluta Frech 1902
Invalid names: Ophiceras chamunda Diener 1897 [synonym], Ophiceras platyspira Diener 1897 [synonym], Ophiceras ptychodes Diener 1897 [synonym], Ophiceras sakuntala Diener 1897 [synonym], Ophiceras tingi Tien 1933 [synonym]
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 48 | 12.1 | 7.80 | 21.4 | 12.2 | 6.66 | |
| shell diameter | 48 | 29.7 | 16.1 | 56.2 | 29.8 | 8.62 | |
| shell inflation | 48 | 7.41 | 4.10 | 20.1 | 6.40 | 7.51 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Kiessling 2003 | |||||
Age range: base of the Griesbachian to the top of the Olenekian or 251.90200 to 246.70000 Ma
Collections (59 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Griesbachian | Oman | Ophiceras sakuntala (44788 44792 44795 44801 44804) | |
| Griesbachian | China (Xizang) | Ophiceras medium (229688 229689 229690 229691 229692 229693 229694 229726 229776 229777 229778 229779) | |
| Griesbachian | India (Kashmir) | Lytophiceras ptychodes (215002) Lytophiceras sakuntala (48914) Ophiceras ptychodes (214659) Ophiceras sakuntala (131943) | |
| Griesbachian | Azerbaijan | Ophiceras medium (110605 110710 110724 110733) | |
| Griesbachian | China (Guizhou) | Lytophiceras chamunda (151118) Ophiceras medium (198877 198878 198879 198880 198881 198882 198883 198885 198886) Ophiceras tingi (151139 151143) | |
| Griesbachian | Armenia | Ophiceras medium (110759 110760) | |
| Griesbachian | Thailand | Ophiceras sakuntala, Ophiceras chamunda (97003) | |
| Griesbachian | Greenland | Ophiceras chamunda (48113 118690 118702) Ophiceras chamunda, Ophiceras ptychodes (118744) Ophiceras evolutum (48114) Ophiceras ptychodes (118625) | |
| Griesbachian | India | Ophiceras chamunda (44019 44024 44025) Ophiceras medium (type locality: 110990) Ophiceras medium, Ophiceras platyspira, Ophiceras sakuntala, Ophiceras chamunda (44026) Ophiceras medium, Ophiceras platyspira, Ophiceras sakuntala, Ophiceras ptychodes, Ophiceras chamunda (44028) Ophiceras sakuntala (44017 44018 44021) Ophiceras sakuntala, Ophiceras chamunda (85463) | |
| Early/Lower Triassic | USA (Nevada) | Ophiceras sakuntala (33313) | |
| Dienerian | Pakistan (Punjab) | Ophiceras sakuntala (217479) | |
| Olenekian | Indonesia | Ophiceras sakuntala (204264) |