| _version_ | 1866902311527251968 |
|---|---|
| author | Lemierre, Alfred Wilenzik, Ian V. Orliac, Maëva J. |
| author_facet | Lemierre, Alfred Wilenzik, Ian V. Orliac, Maëva J. |
| contents | <p><b><i>Eoanilius</i> aff. <i>europae</i></b></p><p>(Fig. 2 A-E)</p><p>REFERRED SPECIMEN. — One anterior trunk vertebra (UM-DAM2-23).</p><p>DESCRIPTION</p><p>The vertebra is very small and almost as wide as long (Fig. 2 A-E). The vertebra is from the anterior portion of the vertebral column. The neural arch is depressed (Fig. 2C), with a low neural spine, extending anteriorly up to the posterior margin of the zygosphene (Fig. 2C). The posterior margin of the neural arch bears a deep medial notch (Fig. 2D). The pre- and postzygapophyses have anteroposteriorly elongated articular facets (Fig. 2D, E), and no prezygapophyseal processes are preserved. The zygosphene anterior margin is thin, straight, and seems to bear two faint lateral lobes (Fig. 2A). The articular facets of the zygosphene are oriented slightly lateroventrally (Fig. 2A). The cotyle is circular and smaller than the neural canal (Fig. 2A). The paradiapophyses are eroded but seem to form a single articular facet on each side (Fig. 2C). No paracotylar foramina are present (Fig. 2A). In ventral view, the centrum widens anteriorly (Fig. 2E). The subcentral ridges are fainted and not well delimited (Fig. 2E). A small hypapophysis extends posteriorly from the ventral surface of the centrum (Fig. 2E).</p><p>ATTRIBUTION</p><p>This anterior vertebra can be assigned to <i>Eoanilius</i> on the following combination: 1) small size; 2) neural arch depressed, 3) posterior margin of the neural arch notched; 4) small and reduced neural spine; and 5) articular facets of the zygosphene horizontal (see Rage 1974; Szyndlar & Rage 2003). Two species are known for this genus, <i>Eoaniliuseuropae</i> and <i>Eoanilius oligocenicus</i> Szyndlar, 1994 (see Szyndlar & Rage 2003; Smith & Georgalis 2022). Our specimen does resemble <i>Eoanilius europae</i> on the following combination of characters (Rage 1974; Szyndlar 1994; Szyndlar & Rage 2003): 1) small neural spine with poorly defined anterior border; 2) paradiapophyses smaller than in <i>E. oligocenicus</i> (Szyndlar 1994); and 3) bilobed zygosphene (trilobed in <i>E.oligocenicus</i>). However, because anterior trunk vertebrae are not always diagnostic for extinct species, we assign our specimen to <i>Eoanilius</i> aff. <i>europae</i>.</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_19921443 |
| institution | Zenodo |
| language | |
| publishDate | 2026 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Eoanilius europae Rage 1974 Lemierre, Alfred Wilenzik, Ian V. Orliac, Maëva J. Biodiversity Taxonomy Animalia Chordata Reptilia Squamata Aniliidae Eoanilius Eoanilius europae <p><b><i>Eoanilius</i> aff. <i>europae</i></b></p><p>(Fig. 2 A-E)</p><p>REFERRED SPECIMEN. — One anterior trunk vertebra (UM-DAM2-23).</p><p>DESCRIPTION</p><p>The vertebra is very small and almost as wide as long (Fig. 2 A-E). The vertebra is from the anterior portion of the vertebral column. The neural arch is depressed (Fig. 2C), with a low neural spine, extending anteriorly up to the posterior margin of the zygosphene (Fig. 2C). The posterior margin of the neural arch bears a deep medial notch (Fig. 2D). The pre- and postzygapophyses have anteroposteriorly elongated articular facets (Fig. 2D, E), and no prezygapophyseal processes are preserved. The zygosphene anterior margin is thin, straight, and seems to bear two faint lateral lobes (Fig. 2A). The articular facets of the zygosphene are oriented slightly lateroventrally (Fig. 2A). The cotyle is circular and smaller than the neural canal (Fig. 2A). The paradiapophyses are eroded but seem to form a single articular facet on each side (Fig. 2C). No paracotylar foramina are present (Fig. 2A). In ventral view, the centrum widens anteriorly (Fig. 2E). The subcentral ridges are fainted and not well delimited (Fig. 2E). A small hypapophysis extends posteriorly from the ventral surface of the centrum (Fig. 2E).</p><p>ATTRIBUTION</p><p>This anterior vertebra can be assigned to <i>Eoanilius</i> on the following combination: 1) small size; 2) neural arch depressed, 3) posterior margin of the neural arch notched; 4) small and reduced neural spine; and 5) articular facets of the zygosphene horizontal (see Rage 1974; Szyndlar & Rage 2003). Two species are known for this genus, <i>Eoaniliuseuropae</i> and <i>Eoanilius oligocenicus</i> Szyndlar, 1994 (see Szyndlar & Rage 2003; Smith & Georgalis 2022). Our specimen does resemble <i>Eoanilius europae</i> on the following combination of characters (Rage 1974; Szyndlar 1994; Szyndlar & Rage 2003): 1) small neural spine with poorly defined anterior border; 2) paradiapophyses smaller than in <i>E. oligocenicus</i> (Szyndlar 1994); and 3) bilobed zygosphene (trilobed in <i>E.oligocenicus</i>). However, because anterior trunk vertebrae are not always diagnostic for extinct species, we assign our specimen to <i>Eoanilius</i> aff. <i>europae</i>.</p> |
| title | Eoanilius europae Rage 1974 |
| topic | Biodiversity Taxonomy Animalia Chordata Reptilia Squamata Aniliidae Eoanilius Eoanilius europae |
| url | https://doi.org/10.5281/zenodo.19921443 |