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Portlandemys gracilis
Discussion
This taxon name was registered on 28 April 2015 in the ZooBank in the LSID: urn:lsid:zoobank.org:act:EEA3C356-8A08-4687-B182-BB2A650F48A2
Taxonomy
Portlandemys gracilis was named by Anquetin et al. (2015). Its type specimen is MJSN BSY009-708, a partial skull (partial cranium consisting of the basicranium and the skull roof), and it is a 3D body fossil. Its type locality is Bois de Sylleux, 2009 coll., which is in a Kimmeridgian carbonate marl in the Reuchenette Formation of Switzerland.
Synonymy list
| Year | Name and author |
|---|---|
| 2015 | Portlandemys gracilis Anquetin et al. |
| 2017 | Portlandemys gracilis 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.
†Portlandemys gracilis Anquetin et al. 2015
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. Anquetin et al. 2017 | Portlandemys gracilis can be diagnosed as a “ple- siochelyid” and a representative of Portlandemys by the full list of cranial characters provided for these taxa above. Portlandemys gracilis differs from Portlandemys mcdowelli by having a more gracile cranium, a less robustly ossified skull roof and basicra- nium, a reduced, narrow processus trochlearis oticum formed mostly by the quadrate, a broad contact between nasal and frontal on the dorsal surface of the skull roof preventing a midline con- tact of the prefrontals, absence of a ridge closing the pterygoid fossa posteriorly, foramen posterius canalis carotici interni located on posterior margin of the pterygoid (barely visible in ventral view) further away from the basisphenoid-pterygoid suture, a raised pedestal on the dorsal surface of the pterygoid contacting the processus interfenestralis of the opisthotic, a basisphenoid ogival in outline in ventral view, a more gracile mandible with a low profile in lateral view, weakly developed lin- gual ridges on the mandible, a symphyseal region broadly rounded as seen in dorsal view, absence of symphyseal hook, and splenial triangular in shape with extended anterior part. |
Measurements
No measurements are available
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| Source: c = class, subp = subphylum, uc = unranked clade | |||||
| References: Hendy et al. 2009, Carroll 1988 | |||||
Age range: Late/Upper Kimmeridgian or 155.70000 to 150.80000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Kimmeridgian | Switzerland (Jura) | Portlandemys gracilis (type locality: 171092 171093) |