Xenosirembo decipiens ( 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 : 60

Xenosirembo decipiens ( Koken, 1888)

Fig. 38J

Otolithus (Sciaenidarum) decipiens Koken, 1888: 285 , pl. 19 figs 5–6.

“genus Sirembinorum ” decipiens – Nolf 1980: 137, pl. 16 fig. 13; 1985: 66; 2003: 5, pl. 1 fig. 7. Xenosirembo decipiens – Schwarzhans 1981b: 80, fig. 27.

“ Sirembinus ” decipiens – Nolf 2013: 66, pl. 128.

Remarks

Based on the convexity of the inner face and configuration of the cauda, Nolf (1980) indicated a possible relationship of this species with Sirembo and placed it within the Sirembini. The species is only known from Koken’s original collection ( Nolf 2003), and no otoliths of X. decipiens were found in our newly collected material.

Stratigraphic and geographic distribution

This species is only known from the “Clayborne Beds”, probably from Claiborne Bluff, “upper” Lisbon Formation, Gosport Sand, Bartonian, Alabama.

Figures

Fig. 38 (opposite page). Fish otoliths from the US middle and upper Eocene. A. “Ophichthus” brevior (Koken, 1888), holotype (ZMB Ot. 26), “Jackson Beds”, Mississippi (?). B. Gnathophis dissimilis (Frizzell & Lamber, 1962), Moodys Branch F., Town Creek, Jackson, Mississippi (IRSNB P 9038). C. Paraconger solidus Müller, 1999, holotype (coll. Institut für Geowissenschaften, University of Leipzig, Nr. 10/P67), Piney Point F., loc. 24 (Horseshoe) of Müller, 1999, Virginia. D–G. Paraconger yazooensis Nolf & Stringer, 2003, Yazoo Clay, Tullos M., Copenhagen, Louisiana. D. Holotype (IRSNB P 6962). E–G. Paratypes (IRSNB P 6963–6965). H. Muraenanguilla aff. thevenini (Priem, 1906), Yazoo Clay, Copenhagen, Louisiana (IRSNB P 6966). I. Signata nicoli Dante & Frizzell, 1965, Weches F., Pleasanto, Atascosa County, Texas, holotype (USNM 23370). J. Xenosirembo decipiens (Koken, 1888), lectotype (ZMB Ot. 135), middle Eocene, “Clayborne Group”, southern USA. K. Brotula aquitanica Nolf, 1980, Yazoo Clay, Tullos M., Copenhagen, Louisiana (IRSNB P 7419). L–O. Aequalobythites aequaloides (Nolf & Stringer, 2003), Yazoo Clay, Copenhagen, Louisiana.L. Holotype (IRSNB P 6977). M–O. Paratypes (IRSNB P 6978–6980). 1 = ventral view; 2 = inner view. Scale bars = 1 mm.