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| Acceso en liña: | https://doi.org/10.5281/zenodo.3664355 |
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| author | Ebersole, Jun A. Cicimurri, David J. Stringer, Gary L. |
| author_facet | Ebersole, Jun A. Cicimurri, David J. Stringer, Gary L. |
| contents | <p><b><i>Paraconger sector</i> (Koken, 1888)</b></p><p>Fig. 69 I–J</p><p><i>Otolithus</i> (<i>Platessae</i>) <i>sector</i> Koken, 1888: 292, pl. 17, fig. 14.</p><p><i>Paraconger sector</i> – Nolf 1985: 292, pl. 17, fig. 14; 2003: 4, pl. 1, fig. 2a–b; 2013: 35–37, pl. 24. — Nolf & Stringer 2003: 7, pl. 2, figs 9a–10.</p><p><i>Paraconger americanus</i> – Müller 1999: 70, pl. 20, figs 11–17.</p><p><b>Material examined</b></p><p>UNITED STATES OF AMERICA – <b>Alabama</b> • 4 otoliths; GLS otolith comparative collection (3 specimens), MSC 39052.</p><p><b>Description</b></p><p>Species characterized by massive otoliths; height approximately 75% of the length. Margins primarily smooth; anterior margin is rounded. Ostial rim slightly concave, posterodorsal rim displays only very slight concavity. Posterior noticeably tapered, often almost bluntly pointed. Anteroventral rim rounder, shorter than posteroventral rim; posteroventral rim straighter and longer. Very slight angularity along ventral rim, near center. Inner face mainly smooth, convex. Sulcus fairly wide, only slightly incised. Sulcus filled with colliculum; ostial channel present. No clear division of ostial and caudal portions of sulcus. Posterior end of sulcus with some ventral widening. No indication of ventral furrow. Outer face smooth, convex except for area near posterior end, where shallow dorsoventrally oriented depression is located.</p><p><b>Remarks</b></p><p>This species and <i>Ariosoma nonsector</i> (see above) were originally described as one species by Koken (1888), but <i>Paraconger sector</i> was separated by Nolf & Stringer (2003). <i>Paraconger sector</i> is distinguished from <i>Ariosoma nonsector</i> by its greater length compared to its height (more elongate) and a narrower sulcus. Like the previous taxon, <i>P. sector</i> has a middle-to-late Eocene range in Alabama, Louisiana, Mississippi, and Virginia in the USA, and it also occurs in lower Oligocene (Rupelian) strata of Alabama, Louisiana, and Mississippi.</p><p><b>Stratigraphic and geographic range in Alabama</b></p><p>This taxon is known from the “upper” Lisbon Formation at site ACh-8 and the basal Gosport Sand at site ACl-4. Bartonian, zones NP16 and NP17.</p> |
| format | Recurso digital |
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| spellingShingle | Paraconger sector Ebersole, Jun A. Cicimurri, David J. Stringer, Gary L. Biodiversity Taxonomy Animalia Chordata Actinopterygii Anguilliformes Congridae Paraconger Paraconger sector <p><b><i>Paraconger sector</i> (Koken, 1888)</b></p><p>Fig. 69 I–J</p><p><i>Otolithus</i> (<i>Platessae</i>) <i>sector</i> Koken, 1888: 292, pl. 17, fig. 14.</p><p><i>Paraconger sector</i> – Nolf 1985: 292, pl. 17, fig. 14; 2003: 4, pl. 1, fig. 2a–b; 2013: 35–37, pl. 24. — Nolf & Stringer 2003: 7, pl. 2, figs 9a–10.</p><p><i>Paraconger americanus</i> – Müller 1999: 70, pl. 20, figs 11–17.</p><p><b>Material examined</b></p><p>UNITED STATES OF AMERICA – <b>Alabama</b> • 4 otoliths; GLS otolith comparative collection (3 specimens), MSC 39052.</p><p><b>Description</b></p><p>Species characterized by massive otoliths; height approximately 75% of the length. Margins primarily smooth; anterior margin is rounded. Ostial rim slightly concave, posterodorsal rim displays only very slight concavity. Posterior noticeably tapered, often almost bluntly pointed. Anteroventral rim rounder, shorter than posteroventral rim; posteroventral rim straighter and longer. Very slight angularity along ventral rim, near center. Inner face mainly smooth, convex. Sulcus fairly wide, only slightly incised. Sulcus filled with colliculum; ostial channel present. No clear division of ostial and caudal portions of sulcus. Posterior end of sulcus with some ventral widening. No indication of ventral furrow. Outer face smooth, convex except for area near posterior end, where shallow dorsoventrally oriented depression is located.</p><p><b>Remarks</b></p><p>This species and <i>Ariosoma nonsector</i> (see above) were originally described as one species by Koken (1888), but <i>Paraconger sector</i> was separated by Nolf & Stringer (2003). <i>Paraconger sector</i> is distinguished from <i>Ariosoma nonsector</i> by its greater length compared to its height (more elongate) and a narrower sulcus. Like the previous taxon, <i>P. sector</i> has a middle-to-late Eocene range in Alabama, Louisiana, Mississippi, and Virginia in the USA, and it also occurs in lower Oligocene (Rupelian) strata of Alabama, Louisiana, and Mississippi.</p><p><b>Stratigraphic and geographic range in Alabama</b></p><p>This taxon is known from the “upper” Lisbon Formation at site ACh-8 and the basal Gosport Sand at site ACl-4. Bartonian, zones NP16 and NP17.</p> |
| title | Paraconger sector |
| topic | Biodiversity Taxonomy Animalia Chordata Actinopterygii Anguilliformes Congridae Paraconger Paraconger sector |
| url | https://doi.org/10.5281/zenodo.3664355 |