Jebel El Onk mine, top of main sublayer (Paleocene of Algeria)

Also known as Djebel Onk

Where: Algeria (34.7° N, 8.0° W: paleocoordinates 28.2° N, 8.9° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Thanetian (59.2 - 56.0 Ma)

• Top of the main sub-layer (2) or "a" belonging to the upper unit of the "Upper Thanetian phosphatic beam"

• bed-level stratigraphic resolution

Environment/lithology: poorly lithified, phosphatic claystone

Size class: macrofossils

Collection methods: bulk, sieve

• Repository: Laboratory of Geosciences, Tebessa University, Algeria

Primary reference: S. Boulemia and S. Adnet. 2023. A new Palaeogene elasmobranch fauna (Tebessa region, eastern Algeria) and the importance of Algerian-Tunisian phosphates for the North African fossil record. Annales de Paléontologie 109(102632) [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 232262: authorized by Matthew Clapham, entered by Matthew Clapham on 04.11.2023

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Squatiniformes - Squatinidae
Squatina prima Winkler 1874 angel shark
 Squaliformes - Squalidae
Squalus sp. Linnaeus 1758 dogfish shark
 Euselachii -
Rhinopristiformes indet. Last et al. 2016 elasmobranch
?Rhinobatos or ?Pristis
 Lamniformes - Mitsukurinidae
Striatolamia striata Winkler 1874 goblin shark
 Lamniformes - Otodontidae
Otodus obliquus, "? Cretalamna sp." = Cretolamna
Otodus obliquus Agassiz 1838 mackerel shark
"? Cretalamna sp." = Cretolamna Glikman 1958 mackerel shark
 Lamniformes - Odontaspididae
Brachycarcharias lerichei Casier 1946 sand tiger shark
Jaekelotodus africanus Arambourg 1952 sand tiger shark
 Lamniformes - Serratolamnidae
"Serratolamna" gafsana White 1926 mackerel shark
 Orectolobiformes - Ginglymostomatidae
Nebrius obliquus, Ginglymostoma sp., "Ginglymostoma aff. kouribgaense" = Ginglymostoma khouribgaense
Nebrius obliquus Leidy 1877 nurse shark
Ginglymostoma sp. Müller and Henle 1838 nurse shark
"Ginglymostoma aff. kouribgaense" = Ginglymostoma khouribgaense Noubhani and Cappetta 1997 nurse shark
 Orectolobiformes - Rhinocodontidae
Palaeorhincodon dartevellei Arambourg 1952 carpet shark
 Orectolobiformes - Hemiscylliidae
Hemiscylliidae indet. Gill 1862 carpet shark
Chiloscyllium/Hemiscyllium
 Carcharhiniformes - Galeocerdidae
Physogaleus secundus Winkler 1876 ground shark
Physogaleus onkensis n. sp. Boulemia and Adnet 2023 ground shark
 Carcharhiniformes - Carcharhinidae
Abdounia beaugei, "Rhizoprionodon gantourensis" = Rhizoprionodon ganntourensis
Abdounia beaugei Arambourg 1935 requiem shark
"Rhizoprionodon gantourensis" = Rhizoprionodon ganntourensis Arambourg 1952 sharpnose shark
 Carcharhiniformes - Scyliorhinidae
Premontreia (Oxyscyllium) subulidens Arambourg 1952 cat shark
Scyliorhinus aff. ptychtus Noubhani and Cappetta 1997 cat shark
Scyliorhinus entomodon Noubhani and Cappetta 1997 cat shark
 Myliobatiformes -
Heterotorpedo aff. brahimi Noubhani and Cappetta 1997 stingray
 Myliobatiformes - Rhinopteridae
Garabatis atlasi Cappetta 1993 cow-nosed ray
 Myliobatiformes - Myliobatidae
"Aetomylaeus" cf. dixoni Agassiz 1843 eagle ray
"Aetomylaeus" cf. striatus Agassiz 1843 eagle ray
Burnhamia sp. Cappetta 1976 eagle ray
Archaeomanta priemi Herman 1979 eagle ray
 Myliobatiformes - Dasyatidae
Dasyatis sp. Rafinesque 1810 whiptail stingray