Theriosuchus undetermined
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publication ID |
https://doi.org/10.1093/zoolinnean/zlz106 |
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persistent identifier |
https://treatment.plazi.org/id/3059DC6F-4D6E-0D2C-FF55-F9EAFAD2A8D0 |
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treatment provided by |
Plazi |
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scientific name |
Theriosuchus undetermined |
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CF. THERIOSUCHUS SP.
Localities: Molí del Baró-1, L’Espinau.
Material: MCD-5569–70, IPS-105920, IPS-105922, IPS-96649, IPS-85795, IPS-96669, IPS-96679, IPS-85796 ( Fig. 3J–O View Figure 3 ).
Description: Leaf-shaped teeth, mesiodistally wider than high, showing a well-marked apex. They range between 2.9 and 4.3 mm basiapical height and between 2.9 and 3.3 mm mesiodistal width. Teeth are laterally compressed but not lingually inclined. The crowns show a well-marked basal constriction. Mesial and distal carinae are present. The enamel bears faint basiapical ridges on both sides, but these are more marked on the lingual surface. As in morphotype V, median ridges converge towards the apex, whereas marginal ridges diverge toward the carinae ( Fig. 3Z View Figure 3 –AB). These teeth also present a median basiapical depression in the basalmost part of both lingual and labial surfaces that divides the crown into two bulbous halves, making an eight-shaped cross-section ( Fig. 3M View Figure 3 ).
Remarks: This morphology resembles the spatulated teeth of the Atoposauridae . Similar teeth reported from Cruzy (Hérault, France; Martin et al., 2014) and La Cantalera (Teruel, Spain; Puértolas-Pascual et al., 2015a) were referred to? Theriosuchus sp .. Part of the studied sample coming from Molí del Baró-1, was previously referred to Theriosuchus (Marmi et al., 2016) . The taxonomic assignment of these teeth was also supported by Tennant et al. (2016) based on their ornamentation pattern, although these authors also noted that they fall into the chronostratigraphical range of Sabresuchus sympiestodon . Morphotype VI includes some teeth that tend to the morphotype V in shape (e.g. MCD-5570; Fig. 3N–O View Figure 3 ). This could reinforce the hypothesis that both morphotypes indeed belong to the same dental series referable to cf. Theriosuchus . Heterodonty in the tooth row of atoposaurids is well known ( Tennant et al., 2016): morphotype VI would represent posterior (molariform) teeth¸ whereas morphotype V would belong to the anterior part of the series. This morphotype corresponds to morphotype 10 described by Marmi et al. (2016) from the Molí del Baró-1 site.
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