Percoidei indet. 1, Giill, 1861

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, including an analysis of otoliths, European Journal of Taxonomy 585, pp. 1-274 : 212

Percoidei indet. 1

Fig. 71 M–N

Material examined

UNITED STATES OF AMERICA – Alabama • 5 otoliths; GLS otolith comparative collection (4 specimens), MSC 39063 .

Description

Sulcus distinctly divided, clearly heterosulcoid. Wide ostium, much narrower cauda. Cauda is uniform in width, downturned ventrally. Ostium tends to widen ventrally.

Remarks

The five specimens exhibit features of percoids (Suborder Percoidei, Order Perciformes ). Perciform otoliths are usually distinctly heterosulcoid, with an ostium that widens ventrally and a much narrower cauda that is usually uniform in its width and bent ventrally. Unfortunately, the specimens could not be identified to a specific perciform family.

Stratigraphic and geographic range in Alabama

All of the specimens assigned to Percoidei indet. 1 were recovered from the “upper” Lisbon Formation at site ACh-8. Bartonian, zones NP16 and NP17.

Figures

Fig. 71. Claiborne Group, “upper” Lisbon Formation, otoliths. A–B. Lactarius kokeni Frizzell & Dante, 1965, MSC 39058. A. Inner face (right sagitta). B. Dorsal view. —C–D. Lactarius amplus Pomerol, 1973, MSC 39059. C. Inner face (left sagitta). D. Dorsal view. — E–F. Malacanthus? sulcatus (Koken, 1888), MSC 39061. E. Inner face (left sagitta, cauda worn). F. Dorsal view. — G–H. Orthopristis burlesonis Frizzell & Dante, 1965, MSC 39060. G. Inner face (left sagitta). H. Dorsal view. — I–J. Haemulon? obliquus (Müller, 1999), MSC 39062. I. Inner face (left sagitta). J. Dorsal view. — K–L. Anisotremus? sp., MSC 42236. K. Inner face (right sagitta). L. Dorsal view. — M–N. Percoidei, indet. 1, MSC 39063. M. Inner face (right sagitta). N. Dorsal view. — O–P. Sciaena intermedius (Koken, 1888), MSC 39050. O. Inner face (left sagitta). P. Dorsal view. — Q–R. Jeftichia copelandi Frizzell & Dante, 1965, MSC 39053. Q. Inner face (right sagitta, worn, especially anterior margin). R. Dorsal view. Scale bars: A–J, O–P=2 mm; K–L, Q–R =5 mm; M–N= 1 mm.