Geologic formation in Arkansas, United States
The Arkadelphia Marl , also called the Arkadelphia Formation , is a geologic formation in Arkansas in Clark , Nevada , and Hempstead counties.[3] [4] It preserves fossils dating back to the late Maastrichtian stage of the Cretaceous period .
Bony fish reported from the Arkadelphia Formation Genus Species Presence Material Notes Images Albulidae indet. Indeterminate Cabot, Arkansas .[5] 4 small, eroded otoliths .[5] A bonefish . Ampheristus A. cf. A. americanus Cabot, Arkansas .[5] 6 otoliths.[5] An ophidiiform . Anguilla A.? chickasawae Cabot, Arkansas .[5] 6 otoliths.[5] An eel . Apateodus A. crenellatus? Cabot, Arkansas .[5] 3 otoliths.[5] An aulopiform . Arius A.? subtilis Cabot, Arkansas .[5] A well-preserved otolith (DMNH 2021-09-11).[5] A catfish . Clupeiformes ? indeterminate Indeterminate Cabot, Arkansas .[5] An eroded, broken otolith (DMNH 2021-09-10).[5] A clupeiform . Echiophis E. aff. E. semisphaeroides Cabot, Arkansas .[5] 11 otoliths.[5] An eel . Elopothrissus E. sp. Cabot, Arkansas .[5] One otolith (DMNH 2021-09-03).[5] A bonefish . Elops E. sp. Cabot, Arkansas .[5] A small, broken otolith (DMNH 2021-09-01).[5] A ladyfish . Eutawichthys E. maastrichtiensis Cabot, Arkansas .[5] 21 otoliths.[5] A beryciform . E. cf. E. stringeri Cabot, Arkansas .[5] 48 otoliths.[5] A beryciform . E. zideki Cabot, Arkansas .[5] 287 otoliths.[5] A beryciform . Gadiformes indeterminate Indeterminate Cabot, Arkansas .[5] 11 very small or broken otoliths.[5] A gadiform . Genartina G. sp. 1 Cabot, Arkansas .[5] One otolith (DMNH 2021-09-04).[5] Kokenichthys K. navis Cabot, Arkansas .[5] 2 eroded otoliths.[5] An osteoglossiform . Lapillus type 1 Indeterminate Cabot, Arkansas .[5] A small, slightly eroded otolith (DMNH 2021-09-31).[5] An unidentified fish otolith . Muraenanguilla M.? sp. Cabot, Arkansas .[5] 2 worn, broken otoliths.[5] An eel . Osmeroides O. sp. Cabot, Arkansas .[5] 3 otoliths.[5] Palaeogadus P.? belli Cabot, Arkansas .[5] Multiple otoliths.[5] A gadiform . P. cf. P. weltoni Cabot, Arkansas .[5] A small, slightly eroded otolith (DMNH 2021-09-23).[5] A gadiform . Protobythites P. brzobohatyi Cabot, Arkansas .[5] 4 otoliths.[5] An ophidiiform . Tippaha T. mythica Cabot, Arkansas .[5] 8 otoliths.[5] A holocentriform . Vorishia V. vulpes Cabot, Arkansas .[5] 1,537 otoliths.[5] A catfish .
^ McFarland, John David (2004) [1998]. "Stratigraphic summary of Arkansas" (PDF) . Arkansas Geological Commission Information Circular . 36 : 31. Archived from the original (PDF) on 2016-12-21. Retrieved 2018-01-12 . ^ Hill, R.T. (1888). "The Neozoic geology of southwestern Arkansas". Arkansas Geological Survey Annual Report 1888 . 2 : 33, 39, 53–56, 72, 188. ^ "ARKADELPHIA MARL/FORMATION" . Archived from the original on 2016-08-19. Retrieved 2016-07-31 . ^ "Arkadelphia Marl (ARKad;0)" . ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak al am an ao ap aq ar as at Stringer, Gary L.; Sloan, James Carson (2023-05-25). "First Cretaceous teleostean otolith assemblage (Arkadelphia Formation, upper Maastrichtian) from Arkansas, USA, early Gadiformes, and the Western Interior Seaway" . PaleoBios . 40 (3). doi :10.5070/P940361192 . ISSN 2373-8189 . ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag Becker, Martin A.; Chamberlain Jr, John A.; Wolf, George E. (2006). "Chondrichthyans from the Arkadelphia Formation (Upper Cretaceous: Upper Maasstrichtian) of Hot Spring County, Arkansas" . Journal of Paleontology . 80 (4): 700–716.