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Eurysternum
Taxonomy
Eurysternum was named by Meyer (1839). Its type is Eurysternum wagleri.
It was assigned to Thalassemydidae by Lortet (1892), Bräm (1965), Fernandez and de la Fuente (1988); to Thalassemyidae by Carroll (1988); to Plesiochelyidae by de Broin and de la Fuente (1993); to Testudines by Joyce (2003); to Eurysternidae by Lapparent de Broin et al. (1996), Karl et al. (2012), Anquetin and Joyce (2014), Anquetin et al. (2014), Anquetin et al. (2017); and to Thalassochelydia by Joyce and Mäuser (2020).
It was assigned to Thalassemydidae by Lortet (1892), Bräm (1965), Fernandez and de la Fuente (1988); to Thalassemyidae by Carroll (1988); to Plesiochelyidae by de Broin and de la Fuente (1993); to Testudines by Joyce (2003); to Eurysternidae by Lapparent de Broin et al. (1996), Karl et al. (2012), Anquetin and Joyce (2014), Anquetin et al. (2014), Anquetin et al. (2017); and to Thalassochelydia by Joyce and Mäuser (2020).
Species
E. neuquinum, E. wagleri (type species)
Entered
by J. Alroy on 2003-01-23; modified by E. Vlachos on 2020-06-04
Synonymy list
| Year | Name and author |
|---|---|
| 1839 | Eurysternum Meyer p. 77 |
| 1892 | Eurysternum Lortet p. 24 |
| 1965 | Eurysternum Bräm p. 164 |
| 1988 | Eurysternum Carroll |
| 1988 | Eurysternum Fernandez and de la Fuente |
| 1993 | Eurysternum de Broin and de la Fuente p. 13 |
| 1996 | Eurysternum Lapparent de Broin et al. pp. 554-555 |
| 2003 | Eurysternum Joyce |
| 2012 | Eurysternum Karl et al. |
| 2014 | Eurysternum Anquetin and Joyce |
| 2014 | Eurysternum Anquetin et al. |
| 2017 | Eurysternum Anquetin et al. pp. 329-330 |
| 2020 | Eurysternum Joyce and Mäuser |
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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. †Eurysternum Meyer 1839
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†Eurysternum neuquinum Fernandez and de la Fuente 1988
†Eurysternum wagleri Meyer 1839
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. Anquetin et al. 2017 | Eurysternum wagleri can be diagnosed as a “eurysternid” by the full list of characters provided for this taxon above: thin-shelled and small to moderately sized (carapace length 200 to 400 mm), by the presence of a ligamentous bridge and lateral plastral fontanelles, and a tendency toward the reduction of sutural contacts between the hyoplastra and the anterior plastral elements. |
Measurements
No measurements are available
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| Source: subc = subclass, c = class, subp = subphylum, p = phylum | |||||
| References: Bambach et al. 2007, Kiessling 2004, Carroll 1988, Hendy et al. 2009 | |||||
Age range: base of the Early/Lower Kimmeridgian to the top of the Early/Lower Tithonian or 154.80000 to 145.06000 Ma
Collections (13 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Kimmeridgian | Germany (Nordrhein-Westfalen) | E. wagleri (182492) | |
| Late/Upper Kimmeridgian | Germany (Bavaria) | E. wagleri (132944) | |
| Late/Upper Kimmeridgian | Germany (Bayern) | E. wagleri (59175 130048) | |
| Early/Lower Tithonian | Germany (Bayern) | E. wagleri (81855 106543 123985 144679) | |
| Early/Lower Tithonian | Germany (Bavaria) | E. wagleri (58604) | |
| Early/Lower Tithonian | Argentina (Neuquén) | E. neuquinum (79651) | |
| Early/Lower Tithonian | France (Poitou-Charentes) | E. sp. (164377) | |
| Early/Lower Tithonian | France (Provence-Alpes-Côte d'Azur) | E. sp. (35262) | |
| Early/Lower Tithonian - Late/Upper Tithonian | Argentina (Neuquén) | E. neuquinum (79652) |