Ariosoma nonsector Nolf & Stringer, 2003

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 : 34

Ariosoma nonsector Nolf & Stringer, 2003

Fig. 11A–D

Ariosoma nonsector Nolf & Stringer, 2003: 7 , pl. 2 figs 1–6.

Otolithus (Platessae) sector – Koken 1888: 292, pl. 17 figs 15–16, non fig. 14 (= lectotype of Paraconger sector ).

Ariosoma nonsector – Nolf 2003: 3, pl. 1 figs 3–4; 2013: 35, pl. 21. — Ebersole et al. 2019: 189, fig. 69g –h. — Stringer et al. 2022: 5, fig. 3c.

Remarks

The otoliths of A. nonsector are deep and more compact than those of similar-looking Paraconger ones; they also have a much broader but shorter and less incised sulcus.

This taxon is the only species of Ariosoma known from the American Eocene.

Stratigraphic and geographic distribution

Lutetian: “Stone City beds”, Texas; Dobys Bluff Tongue of Kosciusko Formation, Mississippi; “lower” Lisbon Formation, Alabama. Bartonian: Wheelock Member, Texas; Cook Mountain Formation, Mississippi; “upper” Lisbon Formation, Alabama; Moodys Branch Formation, Louisiana, Mississippi and Alabama. Priabonian: Yazoo Clay, Louisiana.

Figures

Fig. 11. Fish otoliths from the US middle and upper Eocene. A–D. Ariosoma nonsector Nolf & Stringer, 2003. A–C. Wheelock M., Little Brazos River, Stenzel loc., Texas (IRSNB P 9993–9995).D. “Stone City beds”, Stone City Bluff, Brazos River, sample 5 from bed S, Texas (IRSNB P 9996). E–F. Paraconger wechesensis sp. nov., Weches F., Wall Farm 1, Texas. E. Holotype (IRSNB P 9997). F. Paratype (IRSNB P 9998). G–L. Paraconger brazosensis (Dante & Frizzell, 1965), “Stone City beds”, Stone City Bluff, Brazos River, sample 2 from bed P, Texas (IRSNB P 9999–10004). 1 = ventral view; 2 = inner view. Scale bars = 1 mm.