GENARTINA FRIZZELL AND DANTE, 1965

GENARTINA SP. 1 (SENSU SCHWARZHANS AND STRINGER,

2020a)

FIG. 5D

Material— one specimen, DMNH 2021-09- 04.

Description and Remarks— The one specimen attributed to the fossil otolith-based Genartina is similar to Genartina sp. 1 reported and illustrated by Schwarzhans and Stringer (2020a). The specimen is high-bodied, somewhat discoid in shape (sensu Smale et al. 1995), thin and flat, a gentle and deeply curved ventral margin, and a short, pointed rostrum (which is often broken). The sulcus is slightly dorsal with a much longer, tapering cauda and a somewhat oval ostium. The Arkadelphia specimen resembles G. abbatiae (Stinton, 1965) from the European Paleocene and early Eocene (see under “ Harpadontina ” abbatiae in Nolf 2013, pl. 58). The specimen also somewhat resembles G. texana Dante and Frizzell (1965) described from the Eocene of the USA Gulf Coastal Plain (Frizzell and Dante 1965). Schwarzhans and Stringer (2020) noted that Genartina has a relatively large stratigraphic range from Late Cretaceous (Santonian) to middle Eocene (Bartonian). Its taxonomic assignment has been greatly debated and included the Osteoglossiformes Regan (1909) (Frizzell and Dante 1965), Osmeridae Forey(1973) (Nolf1985), Elopiformes (including Albuliformes) in Schwarzhans (2003, 2012), Harpodontidae Bleeker (1875) (Nolf 2013), Synodontidae Gill (1861) (Stringer et al. 2016), and Stomiiformes Fink and Weitzmann (1982) (Schwarzhans et al. 2018b). Schwarzhans and Stringer (2020a) proposed that Genartina probably belongs to an extinct family and order of bony fishes and placed it after the Albuliformes .