Trachinus laevigatus, (Koken, 1888)

Lin, Chien-Hsiang & Nolf, Dirk, 2022, Middle and late Eocene fish otoliths from the eastern and southern USA, European Journal of Taxonomy 814, pp. 1-122 : 72-74

“ Trachinus ” laevigatus ( Koken, 1888)

Fig. 25A–B

Otolithus (Trachini) laevigatus Koken, 1888: 286 , pl. 18 figs 13–14.

“genus Trachinidarum” laevigatus – Nolf & Stringer 2003: 6, pl. 8 fig. 1. — Nolf 2003: 10, pl. 3 fig. 12. “ Trachinida ” laevigata – Nolf 2013: 115, pl. 310.

Remarks

The otoliths of this species show typical features of trachinid otoliths and seem to be closely related to those of the genus Trachinus , which is presently distributed in the eastern Atlantic. It should be noted, however, that there is a fossil Western Atlantic species ( Trachinus unus Müller, 1999 ) from the upper Oligocene Old Church Formation of Virginia.

Stratigraphic and geographic distribution

Lutetian: Weches Formation and “Stone City beds”, Texas; Piney Point Formation, Virginia. Bartonian: “upper” Lisbon Formation, Alabama; Moodys Branch Formation, Mississippi and Alabama. Priabonian: Yazoo Clay, Louisiana.

Figures

Fig. 25. Fish otoliths from the US middle and upper Eocene.A–B. “Trachinus” laevigatus (Koken, 1888). A. Moodys Branch F., Midway, Techeva Creek, Mississippi (IRSNB P 10146). B. “Stone City beds”, Rocky Branch,1.5 miles SW of Stone City Bluff, Texas (IRSNB P 10147). C–G. Astroscopus compactus sp. nov. C. Gosport Sand, Little Stave Creek, Mississippi, holotype (IRSNB P 10148).D–E. Potterchitto M., Newton, NE exit off Interstate 20, Mississippi, paratypes (IRSNB P 10149–10150). F–G. “Upper” Lisbon F., Evansboro (SE of town), Alabama, paratypes (IRSNB P 10151–10152). H–K. Astroscopus fusiformis (Müller, 1999), Piney Point F., Pamunkey River, 1 km E of Eanes property, bed A, Virginia (IRSNB P 10053–10156). 1 = ventral view; 2 = inner view. Scale bars = 1 mm.