INDETERMINATE

Stringer, Gary L. & Sloan, James Carson, 2023, First Cretaceous teleostean otolith assemblage (Arkadelphia Formation, upper Maastrichtian) from Arkansas, USA, early Gadiformes, and the Western Interior Seaway, PaleoBios 40 (1994), pp. 1-39 : 10

CLUPEIFORM? INDETERMINATE

FIG. 6B

Material— one eroded, broken specimen, DMNH 2021-09-10.

Description and Remarks— Although small and somewhat eroded, this specimen is tentatively assigned to the Clupeiformes and is included because of the rarity of clupeids in the Cretaceous. The outline of the sagitta, the flat inner face, and the shape of the sulcus indicate a possible clupeid. Schwarzhans et al. (2018b) assigned 13 specimens to Clupeiform indeterminate from the Eutaw Formation (upper Santonian) of Alabama.

Figures

Figure 6. Otoliths from the Cretaceous Arkadelphia Formation. All specimens unless otherwise noted are inner views of right sagittae. Length in mm. A. Kokenichthys navis Schwarzhans and Stringer (2020b), DMNH 2021-09-9, 4.10 mm. B. Clupeiform? indeterminate DMNH 2021-09-10, 1.42 mm. C. Arius subtilis Schwarzhans and Bratishko (2011), DMNH 2021-09-11, 4.61 mm. D. Vorhisia vulpes Frizzell (1965b), DMNH 2021-09-13, 2.49 mm. E. Vorhisia vulpes Frizzell (1965b), DMNH 2021-09-14, 3.06 mm. F. Vorhisia vulpes Frizzell (1965b), DMNH 2021-09-15, 3.99 mm. G. Vorhisia vulpes Frizzell (1965b), DMNH 2021-09-16, 7.98 mm. H. Vorhisia vulpes Frizzell (1965b), DMNH 2021-09-12, 19.36 mm.