Cymbalophus aff. cuniculus (Owen, 1842)
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publication ID |
https://doi.org/ 10.5252/geodiversitas2023v45a9 |
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publication LSID |
urn:lsid:zoobank.org:pub:1C430978-5EE6-49AE-AF7C-23C710161CB7 |
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DOI |
https://doi.org/10.5281/zenodo.8037900 |
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persistent identifier |
https://treatment.plazi.org/id/D066B24B-520A-B66F-FC22-FA22D9BCFC5B |
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treatment provided by |
Felipe |
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scientific name |
Cymbalophus aff. cuniculus |
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( Fig. 6B View FIG )
MATERIAL. — m3 (R: MNHN-MU12263 [broken]; L: MNHN-CB1597 ) .
DISTRIBUTION. — Mutigny, Condé-en-Brie (MP8+9).
DESCRIPTION
m3 from Mutigny
The tooth is worn and broken, only the talonid is preserved. The hypoconulid lobe is very short.
m3 from Condé-en-Brie ( Fig. 6B View FIG )
The metaconid is not twinned.The lophs are high and well developed. The protolophid is more notched than the hypolophid. The hypoconulid is small, the hypoconulid lobe is very short. A postcristid links the hypoconid to the hypoconulid. The cristid obliqua is oriented toward the middle of the protolophid.
COMPARISONS
The teeth have the same proportion as those of C. cuniculus . The protolophid is less developed than in C. cuniculus , and the cristid obliqua is slightly more lingual. The cristid obliqua ends higher on the protolophid than in C. aff. cuniculus from Rians ( Godinot 1981). The paralophid is much shorter than in C. aff. cuniculus from Rians.
COMMENT
The dental morphology is very similar to that of C. cuniculus , except for the more lingually directed cristid obliqua which is a derived feature. However, such a character could be intraspecific variation ( C. cuniculus is not well known), or temporal and/or geographic variation within a population. The fossil record of Cymbalophus is very scarce as this genus has been recorded only from localities close to the MP7. The discovery of specimens in Condé-en-Brie and Mutigny (MP8-9) extends its range, and this allows to assume some morphological variation of the species through time. Nevertheless, considering the few fossils discovered for this species in these MP8-9 localities, and particularly in Prémontré (MP10) which has yielded a large number of specimens, we do not exclude that this is an extreme and poorly represented variation of Orolophus maldani , which is widespread in these deposits.
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