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Plesiochelys etalloni
Taxonomy
Emys etalloni was named by Pictet and Humbert (1857). Its type specimen is MAJ 2005-11-1, a shell (a shell missing a large part of the carapace medially.), and it is a 3D body fossil. Its type locality is Forêt de Lect, pres de Moirans (Lect Forest), which is in a Tithonian marine horizon in France.
It was recombined as Plesiochelys etalloni by Rütimeyer (1873), Bräm (1965), Gaffney (1975), Perea et al. (2014), Anquetin et al. (2014) and Puntener et al. (2017).
It was recombined as Plesiochelys etalloni by Rütimeyer (1873), Bräm (1965), Gaffney (1975), Perea et al. (2014), Anquetin et al. (2014) and Puntener et al. (2017).
Synonyms
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Synonymy list
Year | Name and author |
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1857 | Emys etalloni Pictet and Humbert p. 1 |
1869 | Stylemys hannoverana Maack p. 7 |
1873 | Plesiochelys sanctaverenae Rutimeyer |
1873 | Plesiochelys solodurensis Rütimeyer p. 50 |
1873 | Plesiochelys etalloni Rütimeyer p. 72 |
1873 | Plesiochelys sanctaeverenae Rütimeyer p. 80 |
1873 | Plesiochelys langii Rütimeyer p. 82 |
1878 | Plesiochelys hannoverana Portis p. 9 figs. Plate 2, figs 6-7 |
1889 | Plesiochelys solodurensis Lydekker pp. 197-198 |
1889 | Plesiochelys hannoverana Lydekker p. 198 |
1902 | Plesiochelys solodurensis Hay p. 439 |
1965 | Plesiochelys etalloni Bräm p. 60 |
1965 | Plesiochelys solodurensis Bräm p. 81 |
1965 | Plesiochelys sanctaverenae Bräm p. 126 |
1975 | Plesiochelys etalloni Gaffney p. 7 |
1996 | Plesiochelys solodurensis Lapparent de Broin et al. pp. 553-554 |
2008 | Plesiochelys solodurensis Danilov and Parham |
2008 | Plesiochelys solodurensis Pérez-García et al. |
2013 | Plesiochelys solodurensis Pérez-García and Murelaga |
2014 | Plesiochelys etalloni Anquetin et al. |
2014 | Plesiochelys etalloni Perea et al. |
2014 | Plesiochelys solodurensis Puntener et al. |
2017 | Plesiochelys etalloni Puntener et al. |
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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.
†Plesiochelys etalloni Pictet and Humbert 1857
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Invalid names: Plesiochelys langii Rütimeyer 1873 [synonym], Plesiochelys sanctaeverenae Rütimeyer 1873 [synonym], Plesiochelys solodurensis Rütimeyer 1873 [synonym], Stylemys hannoverana Maack 1869 [synonym]
Diagnosis
Reference | Diagnosis | |
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E. S. Gaffney 1975 | Member of the Plesiochelyidae (sensu Gaffney, present paper) known from nearly all the skeleton, distinguishable from Plesiochelys planiceps by the following features: lingual ridge of maxilla usually lower than in P. planiceps, anterior portion of lingual ridge on lower jaw curving anteriorly (as opposed to medially in P. planiceps), at level of vomer-premaxilla suture the distance between lingual ridges of maxillae is narrower than in P. planiceps. | |
C. Puntener et al. 2017 | Plesiochelys etalloni differs from other Plesiochelys spp. in a more extensive flooring of the cavum acustico–jugulare by the pterygoid, the complete ossification of the pila prootica, and a narrow, slit-like foramen nervi trigemini. In addition, Plesiochelys etalloni differs from Plesiochelys planiceps in a smaller size, a lower lingual ridge on the maxilla, a narrower distance between the lingual ridges of the maxilla at the level of the pterygoid–vomer suture, a more rounded foramen palatinum posterius, a parietal–quadrate contact posterior to the foramen nervi trigemini, a less developed processus trochlearis oticum, a superficial canalis caroticus internus often remaining partly open ventrally, a reduced contribution of the exoccipital to the condylus occipitalis, and the anterior portion of the lingual ridge on the dentary curving medially, and from Plesiochelys bigleri in a higher temporal skull roof, a deeper pterygoid fossa, a more developed processus trochlearis oticum, an anterior foramen nervi abducentis opening more posteriorly relative to the base of the processus clinoideus, foramina anterius canalis carotici cerebralis opening almost vertically below the dorsum sellae and usually more closely set, a processus paroccipitalis extending mainly posteriorly, an increased neural and costal bone thickness, the presence of epiplastral bulbs, and a more rounded or pointed anterior margin of the anterior plastral lobe. |
Measurements
No measurements are available
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Source: c = class, subp = subphylum, uc = unranked clade | |||||
References: Carroll 1988, Hendy et al. 2009 |
Age range: base of the Late/Upper Kimmeridgian to the top of the Early/Lower Tithonian or 155.70000 to 145.00000 Ma
Collections (11 total)
Time interval | Ma | Country or state | Original ID and collection number |
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Kimmeridgian | Switzerland (Berne) | Plesiochelys etalloni (137800) | |
Kimmeridgian | Switzerland (Jura) | Plesiochelys etalloni (154715 154716) | |
Kimmeridgian - Early/Lower Tithonian | United Kingdom (England) | Plesiochelys etalloni (140709) | |
Early/Lower Kimmeridgian | Germany (Lower Saxony) | Plesiochelys hannoverana (138029) Plesiochelys solodurensis (24127) | |
Late/Upper Kimmeridgian | Switzerland (Jura) | Plesiochelys etalloni (154714) | |
Late/Upper Kimmeridgian | France (Aquitaine) | Plesiochelys hannoverana (94532) | |
Late/Upper Kimmeridgian | Switzerland (Solothurn) | Plesiochelys solodurensis (90875) Plesiochelys solodurensis, Plesiochelys langii, Plesiochelys sanctaverenae, Plesiochelys etalloni, Thalassemys moseri (137749) | |
Early/Lower Tithonian | France (Jura) | Plesiochelys etalloni (type locality: 137799) |