Dryolestidae, Marsh, 1879
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publication ID |
https://doi.org/ 10.5252/geodiversitas2022v44a25 |
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publication LSID |
urn:lsid:zoobank.org:pub:EA12DCB7-A5BE-4763-B805-25087EBD726D |
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DOI |
https://doi.org/10.5281/zenodo.6929070 |
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persistent identifier |
https://treatment.plazi.org/id/03C887B9-FF87-FFDA-7685-A6CBFAECF85A |
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treatment provided by |
Felipe |
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scientific name |
Dryolestidae |
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Dryolestidae indet.
( Fig. 34 View FIG C-F)
DESCRIPTION
Dryolestidae are represented by only two fragmentary molars lacking the roots and the talonid ( Fig. 34 View FIG C-F). Based on the configuration of the trigonid and the lack of a cuspid in median position on the labial side of the molars,those teeth are considered to be left lower molars (Kielan-Jaworowska et al. 2004). Both lower molars are shorter mesiodistally than wide labiolingually, but the most posterior molar(ANG M-01; Fig.34 View FIG E-F)is strongly shortened and widened compared to the anterior molar (ANG M-05; Fig. 34C, D View FIG ). This feature is diagnostic of Dryolestidae (Kielan-Jaworowska et al. 2004) . The trigonid is well-developed in both lower molars.The paraconid of the posterior molar ANG M-01 is broken at its base, but it is labiolingually more elongated than the metaconid. Both are separated by a narrow incision ( Fig.34E View FIG ). The metaconid is enlarged and almost as high as the protoconid ( Fig. 34F View FIG ). Based on these features, the dryolestid molars from Angeac-Charente seem more closely related to either Guimarotodus from the Kimmeridgian of Guimarota in Portugal ( Martin 1999) or Phascolestes from the Berriasian of Dorset in England ( Owen 1871; Kielan-Jaworowska et al. 2004) than any other Dryolestidae . However, additional material is required to allow a more accurate attribution.
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