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Eumorphoceras
Taxonomy
Eumorphoceras was named by Girty (1909) [Sepkoski's age data: C Serp-l Sepkoski's reference number: 304]. It is not extant.
It was assigned to Goniatitida by Sepkoski (2002); to Girtyoceratidae by Titus (2000) and Korn (2006); and to Girtyoceratinae by Furnish et al. (2009).
It was assigned to Goniatitida by Sepkoski (2002); to Girtyoceratidae by Titus (2000) and Korn (2006); and to Girtyoceratinae by Furnish et al. (2009).
Species
E. angustum, E. bisati, E. bisulcatum, E. brevornatum, E. chungweiense, E. girtyi, E. goddardensis, E. hudsoni, E. involutum, E. medusa, E. milleri, E. ornatissimum, E. paucinodum, E. pseudobilingue, E. pseudocoronula, E. richardsoni, E. rostratum, E. rota, E. rotuliforme, E. stubblefieldi, E. tornquisti, E. transuralense, E. tumulosum
Synonymy list
| Year | Name and author |
|---|---|
| 1909 | Eumorphoceras Girty |
| 2000 | Eumorphoceras Titus p. 18 |
| 2002 | Eumorphoceras Sepkoski |
| 2006 | Eumorphoceras Korn |
| 2009 | Eumorphoceras Furnish et al. p. 46 |
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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. †Eumorphoceras Girty 1909
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†Eumorphoceras angustum Moore 1946
†Eumorphoceras bisati Horn 1960
†Eumorphoceras bisulcatum Girty 1909
†Eumorphoceras brevornatum Titus 2000
†Eumorphoceras chungweiense Liang 1957
†Eumorphoceras girtyi Elias 1956
†Eumorphoceras goddardensis Elias 1951
†Eumorphoceras hudsoni Gill 1947
†Eumorphoceras involutum Horn 1960
†Eumorphoceras medusa Yates 1961
†Eumorphoceras milleri Gordon 1964
†Eumorphoceras ornatissimum Miller and Youngquist 1948
†Eumorphoceras paucinodum Gordon, Jr. 1964
†Eumorphoceras pseudobilingue Bisat 1922
†Eumorphoceras pseudocoronula Bisat 1950
†Eumorphoceras richardsoni McCaleb et al. 1964
†Eumorphoceras rostratum Yates 1962
†Eumorphoceras rota Yates 1961
†Eumorphoceras rotuliforme Ruan 1981
†Eumorphoceras stubblefieldi Moore 1946
†Eumorphoceras tornquisti Wolterstoff 1899
†Eumorphoceras transuralense Ruzhentsev and Bogoslovskaya 1971
†Eumorphoceras tumulosum Ruzhentsev and Bogoslovskaya 1971
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 8 | 6.46 | 2.80 | 11.3 | 7.20 | 2.53 | |
| shell diameter | 8 | 14.8 | 10.0 | 22.6 | 15.3 | 3.87 | |
| shell inflation | 8 | 4.61 | 3.70 | 6.40 | 4.80 | 0.940 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: base of the Chesterian to the top of the Arnsbergian or 335.50000 to 323.70000 Ma
Collections (60 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Visean | United Kingdom (Northern Ireland) | E. medusa, E. rota (211912) | |
| Brigantian | Germany (Westfalen) | E. pseudocoronula, E. tornquisti (5536) | |
| Brigantian | USA (Arkansas) | Girtyoceras ornatissimum (157984) | |
| Brigantian | United Kingdom (England) | E. tornquisti (8252) | |
| Chesterian | USA (Nevada) | E. bisulcatum (12781) | |
| Chesterian | USA (Arkansas) | E. bisulcatum (79627) E. sp. (133188) | |
| Chesterian | USA (Oklahoma) | E. bisulcatum, E. girtyi (584) | |
| Pendleian | USA (Arkansas) | E. milleri (84400 84404 157680 157681 157682 157683 157684 157685 157686 157688 157821 157822 157843 157845 157933 157936 157946 157949 157950 157980 157982 157983 158012 160494) | |
| Pendleian | Germany (Westfalen) | E. dichalocium, E. pseudocoronula (5537) E. medusa, E. pseudocoronula (5539) | |
| Pendleian | United Kingdom (Scotland) | E. sp. (92588) | |
| Pendleian - Arnsbergian | United Kingdom (England) | E. bisulcatum (8172 8173 8174) E. sp. (8171) | |
| Serpukhovian | USA (Oklahoma) | E. girtyi (5611) | |
| Serpukhovian | USA (Texas) | E. bisulcatum (128624) | |
| Arnsbergian | USA (Arkansas) | E. bisulcatum (157881 157997) | |
| Arnsbergian | Russian Federation (Bashkortostan) | E. paucinodum (166954) E. transuralense (166953) | |
| Arnsbergian | Russian Federation (Orenburg) | E. bisulcatum (166935) E. tumulosum (166947) | |
| Arnsbergian | United Kingdom (Scotland) | E. bisulcatum (93311 93314) | |
| Arnsbergian | United Kingdom (England) | E. bisulcatum (8254 8255 8461 8463 8464) E. sp. (8617) E. yatesae (8620) | |
| Arnsbergian | USA (Oklahoma) | E. bisulcatum (157974 158039) | |
| Arnsbergian | USA (California) | E. bisulcatum (220592) E. paucinodum (217143) |