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Olcostephanus (Jeannoticeras)
Taxonomy
Olcostephanus (Jeannoticeras) was named by Thieuloy (1965). Its type is Ammonites jeannoti.
It was assigned to Olcostephanus by Thieuloy (1965), Reboulet (1996), Aguirre-Urreta and Rawson (2001).
It was assigned to Olcostephanus by Thieuloy (1965), Reboulet (1996), Aguirre-Urreta and Rawson (2001).
Species lacking formal opinion data
Olcostephanus andartae, Olcostephanus astieri, Olcostephanus astieri, Olcostephanus boussingaultii, Olcostephanus carpathicus, Olcostephanus colorinensis, Olcostephanus copiapoensis, Olcostephanus curacoensis, Olcostephanus densicostatus, Olcostephanus densistriatus, Olcostephanus drumensis, Olcostephanus drumensis, Olcostephanus filosus, Olcostephanus hispanicus, Olcostephanus jeannoti, Olcostephanus jeannoti, Olcostephanus laticostata, Olcostephanus nicklesi, Olcostephanus psilostomus, Olcostephanus sayni-subfilosus, Olcostephanus stephanophorus
Synonymy list
| Year | Name and author |
|---|---|
| 1965 | Olcostephanus (Jeannoticeras) Thieuloy |
| 1996 | Olcostephanus (Jeannoticeras) Reboulet p. 154 |
| 2001 | Olcostephanus (Jeannoticeras) Aguirre-Urreta and Rawson p. 775 |
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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.
Subg. †Olcostephanus (Jeannoticeras) Thieuloy 1965
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†Olcostephanus (Jeannoticeras) agrioensis Aguirre-Urreta and Rawson 2001
†Olcostephanus (Jeannoticeras) jeannoti d'Orbigny 1841
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 4 | 14.0 | 11.1 | 23.2 | 12.3 | 5.68 | |
| shell diameter | 4 | 35.3 | 27.3 | 56.0 | 32.0 | 13.1 | |
| shell inflation | 4 | 10.6 | 8.40 | 17.0 | 9.35 | 4.05 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Kiessling 2003 | |||||
Age range: base of the Late/Upper Valanginian to the top of the Early/Lower Hauterivian or 137.05000 to 125.77000 Ma
Collections (33 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Valanginian | Mexico | Olcostephanus colorinensis (74351 74352 74354 74355) | |
| Early/Lower Hauterivian | Spain (Comunidad Valenciana) | Olcostephanus jeannoti (169142) | |
| Early/Lower Hauterivian | Tunisia | Jeannoticeras jeannoti (205635 205687) | |
| Early/Lower Hauterivian | Italy | Olcostephanus jeannoti (65865) | |
| Early/Lower Hauterivian | Argentina | Olcostephanus agrioensis (61701 61703 61705 61713) | |
| Early/Lower Hauterivian | France | Olcostephanus jeannoti (202616 202620 202623 202624 202650 202652 202654 220964 220965 220966 220967 220969 220970 220971 220974 220975 220977) | |
| Hauterivian | France (Provence) | Olcostephanus jeannoti (56063 56776) | |
| Hauterivian | Georgia | Olcostephanus jeannoti (2114) | |
| Late/Upper Hauterivian | Hungary | Olcostephanus jeannoti (86362) |