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Tropidemys langii
NMS uncat. (paralectotypes), an isolated neural and an isolated costal V (Rütimeyer 1873a, pl. 7.3–4). Additional paralectotypes possibly exist but are impossible to identify with certainty based on the original publication. Rütimeyer (1873a) established Tropidemys langii based on a type series consisting of a large fragment of the pos- terior region of a carapace, several isolated neurals and costals, and several fragments of plastron from the Kimmeridgian of Solothurn, Switzerland. Since no specimen numbers are men- tioned in the original publication, it is difficult to be certain as to which specimens are part of the type series, notably, regard- ing the isolated neurals and costals. Bräm (1965) concluded that all but one of the plastron fragments should be referred to Tha- lassemys hugii, but the remaining specimen (NMS 8651, for- merly NMS 19) was subsequently also excluded from Tropidemys langii based on comparison with more complete material from the vicinity of Porrentruy (Püntener et al. 2014). Therefore, the large fragment of carapace (NMS 8554, formerly NMS 16) is the only unambiguous syntype. Bräm (1965) incorrectly referred to this specimen as the holotype, but, according to the ICZN rules, this should nevertheless be interpreted as a valid lectotype designation (ICZN 1999, art. 74.5). An isolated neural and costal V are the only known potential paralectotypes as they were illustrated by Rütimeyer (1873a), but no attempt has been made to find them in the NMS collections.
It was corrected as Tropidemys langi by Delair (1958), Bräm (1965) and Lapparent de Broin et al. (1996).
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Year | Name and author |
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1873 | Tropidemys langii Rütimeyer p. 43 |
1873 | Tropidemys expansa Rütimeyer p. 44 figs. Plate 9 |
1873 | Tropidemys gibba Rütimeyer p. 45 figs. Plate 4 |
1873 | Craspedochelys plana Rütimeyer p. 91 |
1889 | Tropidemys langii Lydekker pp. 156-157 fig. 38 |
1958 | Tropidemys langi Delair p. 55 |
1965 | Tropidemys langi Bräm p. 176 |
1996 | Tropidemys langi Lapparent de Broin et al. p. 562 |
2014 | Tropidemys langii Anquetin et al. |
2014 | Tropidemys langii Puntener et al. |
2017 | Tropidemys langii Anquetin 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.
Reference | Diagnosis | |
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J. Anquetin et al. 2017 | Tropidemys langii can be diagnosed as a “plesiochelyid” and a representative of Tropidemys by the full list of shell characters provided for those taxa above. Tropidemys langii differs from Tropidemys seebachi by having five vertebral scutes. |
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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 Kimmeridgian or 155.70000 to 152.10000 Ma
Collections (11 total)
Time interval | Ma | Country or state | Original ID and collection number |
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Kimmeridgian | Switzerland (Jura) | Tropidemys langii (154713 154715 154716 154717) | |
Kimmeridgian - Early/Lower Tithonian | United Kingdom (England) | Tropidemys langi (92096) | |
Early/Lower Kimmeridgian | France (Haute-Normandie) | Tropidemys langii (219047) | |
Early/Lower Kimmeridgian | Germany (Nordrhein-Westfalen) | Tropidemys langii (182492) | |
Late/Upper Kimmeridgian | Switzerland (Jura) | Tropidemys langii (154714) | |
Late/Upper Kimmeridgian | France (Aquitaine) | Tropidemys gibba (94532) | |
Late/Upper Kimmeridgian | Switzerland (Solothurn) | Tropidemys langi (90875) Tropidemys langi, Tropidemys expansa, Tropidemys gibba, Craspedochelys plana (type locality: 137749) |