Signata stenzeli Frizzell & Dante, 1965,

Ebersole, Jun A., Cicimurri, David J. & Stringer, Gary L., 2019, Taxonomy and biostratigraphy of the elasmobranchs and bony fishes (Chondrichthyes and Osteichthyes) of the lower-to-middle Eocene (Ypresian to Bartonian) Claiborne Group in Alabama, USA, inclu, European Journal of Taxonomy 585, pp. 1-274: 199-200

publication ID

https://doi.org/10.5852/ejt.2019.585

publication LSID

lsid:zoobank.org:pub:181B6FBA-ED75-4BB4-84C4-FB512B794749

DOI

http://doi.org/10.5281/zenodo.3664410

persistent identifier

http://treatment.plazi.org/id/18174D41-FF43-FF68-FDF6-9C934C860E4E

treatment provided by

Plazi

scientific name

Signata stenzeli Frizzell & Dante, 1965
status

 

Signata stenzeli Frizzell & Dante, 1965 

Fig. 70View Fig G–H

Signata stenzeli Dante & Frizzell in Frizzell & Dante, 1965: 709–710  , pl. 88, figs 12, 16–17.

“genus Ophidiidarum  stenzeli – Nolf 1980: 138  , pl. 20, fig. 7.

“ Ophidiida ” stenzeli – Nolf 2013: 65  , pl. 124.

Material examined

UNITED STATES OF AMERICA – Alabama • 6 otoliths; GLS otolith comparative collection (5 specimens), MSC 39051View Materials  .

Description

Sagittae primarily with ovate shape, height/length ratios tend around 65–70%. Specimens with smooth margins. Anterior margin broadly rounded. Anterodorsal slope fairly straight to slightly incurved, steep. Dorsal margin quite short. Posterodorsal slope slightly outcurved, longer, less inclined than anterodorsal slope. Posterior sharply rounded. Ventral margin broadly and nearly evenly rounded. Smooth inner face strongly convex or inflated near vertical midline, slopes toward margins. Extremely wide, undivided, long sulcus (approximately 95% of otolith length). Very fine incised line marks sulcus. Sulcus extending essentially from anterior margin to very near posterior margin. Very small ostial channel opens on anterior margin (seen on well-preserved specimens). Dorsal margin of sulcus well separated from dorsal margin; ventral margin of sulcus closer to ventral margin. Dorsal margin of sulcus strongly flexed upward near vertical midline of otolith. Ventral margin of sulcus also flexed upward near vertical midline, not as strongly as dorsal margin. Cristae not developed; no depressed area observed. Ventral furrow absent. Outer face shallow, irregularly concave, commonly sculptured with smooth bosses and rugosities, especially in dorsal area.

Remarks

Extensive studies of ophidiid otoliths indicate that Signata stenzeli  does not correspond to any living species. The genus therefore is fossil-based, representing an extinct form. The genus appears to be most common in the Eocene (Claiborne Group) of the US Gulf Coastal Plain.

Stratigraphic and geographic range in Alabama

Signata stenzeli  is known from the “upper” Lisbon Formation at sites ACh-8 and AMo-4. Bartonian, zones NP16 and NP17.

Kingdom

Animalia

Phylum

Chordata

Class

Actinopterygii

Order

Ophidiiformes

Family

Ophidiidae

Genus

Signata

Loc

Signata stenzeli Frizzell & Dante, 1965

Ebersole, Jun A., Cicimurri, David J. & Stringer, Gary L. 2019
2019
Loc

stenzeli –

Nolf 1980: 138
1980
Loc

Signata stenzeli

Dante & Frizzell in Frizzell & Dante 1965: 709
1965