Engolismaia couillardi, Vullo & Cappetta & Néraudeau, 2007
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publication ID |
https://doi.org/ 10.5281/zenodo.13741981 |
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persistent identifier |
https://treatment.plazi.org/id/03A787AC-165D-FFA6-F15C-8799C84CFA88 |
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treatment provided by |
Felipe |
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scientific name |
Engolismaia couillardi |
| status |
gen. et sp. nov. |
Engolismaia couillardi gen. et sp. nov.
Fig. 7A–D View Fig .
Derivation of the name: Species named after Mr.Alain Couillard, for his valuable assistance in the field.
Holotype: Specimen UM TLM 1 .
Paratypes: Specimen UM TLM 2–4 .
Type locality: Traslemaine, Champniers near Angoulême, Charente.
Type horizon: Lower Cenomanian, subunit B2, lithological level B2gl.
Material.—Fifteen teeth from Traslemaine, Champniers, and three teeth from Montagan, Mainxe, Lower Cenomanian, subunit B2. Diagnosis.—Same as for genus.
Description.—The holotype (UM TLM 1; Fig. 7A View Fig ) is a presumed antero−lateral tooth, 0.9 mm wide. In occlusal view, the crown shows a broad, rounded, well−defined apron. The two pairs of cusplets are symmetrically developed on each side of the main cusp. All the cusps have a rounded apex. The basilo−labial ridge is well distinct. The main cusp bears two subvertical folds on its lingual face. The lingual central depression is rather deep. The root, slightly narrower than the crown, displays a flattened basal face, and bears two wellmarked foramina on its lingual face. An anterior (or posterior?) tooth (UM TLM 4; Fig. 7D View Fig ) is narrow, with only one poorly defined lateral cusplet widely united to the base of the main cusp. The other side corresponds to a simple heel. The apron bears a single, oval pustule. The root is relatively high (about one third of the total tooth height).
Remarks.— Engolismaia gen. nov. is a very characteristic element of the Charentes selachian fauna because of its unusual tooth morphology. It is currently known only to occur in the eastern part of the Charentes region (Montagan and Traslemaine localities) and is restricted to the middle part of the Lower Cenomanian.
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