Langental, NE of Bogenfels (Eocene of Namibia)

Where: Sperrgebiet, Namibia (27.4° S, 15.4° E: paleocoordinates 31.4° S, 8.6° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: NP 19-20 nannofossil zone, Langental Beds Formation, Priabonian (38.0 - 33.9 Ma)

• The marine beds are only about 4 m thick. The age can be narrowly defined by the range overlap of Discoaster saipanensis and Isthmolithus recurvus. The former ranges from the middle to upper Eocene and the latter from upper Eocene to lower Oligocene. They co-occur only in the NP 19 and NP 20 zones of Martini's (1971) biostratigraphic zonal scheme, and only in the I. recurvus subzone of Bukry's (1975) zonal scheme. Informally named "Langental Beds."

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; poorly lithified, shelly/skeletal, green, yellow, calcareous siltstone and lithified, concretionary, shelly/skeletal, gray, green, yellow, calcareous sandstone

• Members of the nannofossil genus Braorudosphaera are virtually absent in open-ocean deposits, and are thus strong indicators of nearshore environments; Zygrhablithus bijugatus is also most common in nearshore waters. The benthic foraminifera also suggest a normal marine, shallow-water environment.
• Concretionary calcareous sandstones and marly sandstones and siltstone. At least one layer of light-brown ferruginous calcirudite occurs near the bottom of the section. This layer contains pebbles, but is predominantly composed of neomorphosed mollusc fragments set in micrite and microspar. The marly sand- and siltstones are mostly pale greenish yellow, poorly consolidated, and calcareous. The calcareous concretionary layers are greyish yellow to pale greenish yellow and are moderately well indurated.

Size classes: macrofossils, mesofossils, microfossils

Primary reference: J. Böhm and W. Weisfermel. 1913. Über tertiäre Versteinerungen von den Bogenfelser Diamantfeldern. Beiträge zur Geologischen Erforschung der Deutschen Schutzgebiete 5:58-111 [M. Uhen/M. Uhen/M. Clapham]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 149316: authorized by Mark Uhen, entered by Mark Uhen on 01.08.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

"Lenticulina subalata" = Cristellaria subalata2
"Lenticulina subalata" = Cristellaria subalata2 Reuss 1854
 Planorbulinacea - Cibicididae
Cibicides sp.2 Monfort 1808
 Discorbacea - Bagginidae
 Rotaliacea - Rotaliidae
 Rotaliacea - Elphidiidae
Elphidium sp.2 Monfort 1808
sp. A, sp. B
 Nonionacea - Nonionidae
 Textulariacea - Textulariidae
Textularia sp.2 Defrance 1824
 Nodosariacea - Nodosariidae
 Nodosariacea - Vaginulinidae
Astacolus sp.2 de Montfort 1808
 Nodosariacea - Glandulinidae
Glandulina sp.2 d'Orbigny 1826
 Sessilia - Balanidae
Balanus sp. Da Costa 1778 barnacle
 Arcida - Arcidae
Arca koerti n. sp.
Arca koerti n. sp. Böhm 1913 ark
 Arcida - Noetiidae
Arca (Noetia) reuningi n. sp. Böhm 1913 clam
 Pectinida - Pectinoidae
Pecten sp. Müller 1776 scallop
 Ostreida - Gryphaeidae
Exogyra scheibei n. sp.1 Bohm 1926 oyster
 Ostreida - Ostreidae
"Ostrea digitalina" = Cubitostrea digitalina Eichwald 1830 oyster
Crassostrea rutriformis n. sp.1 oyster
Crassostrea cymbaeformis n. sp.1 oyster
Crassostrea roncana1 oyster
n. forma tenuis
Ostrea gingensis Schlotheim 1813 oyster
var. africana
 Mytilida - Mytilidae
Lithodomus beetzi n. sp.1 Bohm 1926 mussel
Perna sp.1 Retzius 1788 mussel
 Pholadida - Myidae
Mya schweinfurthi1 Mayer-Eymar 1887 softshell clam
 Cardiida - Gastrochaenidae
Rocellaria clausa n. sp.1 Bohm 1926 clam
Rocellaria sacculus n. sp.1 Bohm 1926 clam
 Cardiida - Mactridae
Mactra tumida n. sp.1 Bohm 1926 clam
 Cardiida - Tellinidae
Tellina luderitizi n. sp. tellin clam
Tellina cf. serrata Renier 1804 tellin clam
Tellina (Peronaea) oppenheimi n. sp. Böhm 1913 tellin clam
 Protobranchia - Nuculanidae
"Leda sp." = Nuculana
"Leda sp." = Nuculana Link 1807 pointed nut clam
 Opisthobranchia - Bullidae
Bullinella aff. convoluta1 Brocchi 1800 snail
 Neogastropoda - Buccinidae
Pseudoliva leutweini n. sp.1 Bohm 1926 true whelk
Pseudoliva thielei n. sp.1 Bohm 1926 true whelk
 Neogastropoda - Melongenidae
"Melongena cf. cornuta" = Galeodes cornutus1
"Melongena cf. cornuta" = Galeodes cornutus1 Agassiz 1843 snail
var. patuloidea
 Neogastropoda - Volutidae
Voluta sp.1 Linnaeaus 1758 volute
 Neogastropoda - Turbinellidae
Streptosiphon lotzi n. sp.1 Bohm 1926 snail
Streptosiphon klinghardti n. sp.1 Bohm 1926 snail
Streptosiphon piriformis n. sp.1 Bohm 1926 snail
 Neogastropoda - Costellariidae
Vexillum lindequisti n. sp.1 Bohm 1926 ribbed mitre
 Neogastropoda - Muricidae
Ocinebra dietrichi n. sp.1 Bohm 1926 murex snail
 Neogastropoda - Turridae
Turricula excelsa n. sp.1 Bohm 1926 turrid
 Naticoidea - Naticidae
Natica exilis n. sp.1
Natica exilis n. sp.1 Bohm 1926 moon snail
 Tonnoidea - Cassidae
Sconsia sp.1 Gray 1847 snail
 Sorbeoconcha - Siliquariidae
"Tenagodes sp." = Tenagodus1
"Tenagodes sp." = Tenagodus1 Guettard 1770 snail
 Sorbeoconcha - Turritellidae
Turritella sp.2 Lamarck 1799 turret shell
Turritella terebralis Lamarck 1799 turret shell
var. sulcata, var. applanata
Turritella merenskyi n. sp.1 Bohm 1926 turret shell
Archimediella schetteri n. sp.1 turret shell
Turritella (? Haustator) atlantica n. sp. Böhm 1913 turret shell
Turritella (Haustator) vermicularis Brocchi 1814 turret shell
var. nov. bijugata
 Nautilida - Aturiidae
Aturia lotzi n. sp.
Aturia lotzi n. sp. Böhm 1913 nautiloid
 Cheilostomata - Schizoporellidae
Schizoporella latisinuata1 Ulrich and Bassler 1904
 Cheilostomata - Electridae
Conopeum lamellosum1 Canu and Bassler 1920
 Cheilostomata - Membraniporidae
 Squatiniformes - Squatinidae
Squatina prima1 Winkler 1874 angel shark
 Odontaspidida - Isuridae
Oxyrhina sp.1 Agassiz 1843 mackerel shark
 Odontaspidida - Carcharodontidae
"Oxyrhina hastalis" = Cosmopolitodus hastalis
"Oxyrhina hastalis" = Cosmopolitodus hastalis Agassiz 1843 elasmobranch
 Plagiostomi - Carcharidae
Rhaibodus rapax n. gen. n. sp.1
Rhaibodus rapax n. gen. n. sp.1 Bohm 1926 elasmobranch
 Rhinopristiformes - Pristidae
Oxypristis ferinus n. sp.1 Bohm 1926 sawfish
 Myliobatiformes - Myliobatidae
Myliobatis cf. dixoni1 Agassiz 1843 eagle ray
Rhinoptera rasilis n. sp.1 Bohm 1926 cownose ray
 Lamniformes - Carchariidae
Carcharias (Physodon) quartus n. sp.1 Bohm 1926 mackerel shark
 Lamniformes - Lamnidae
"Oxyrhina desori" = Isurus oxyrinchus1 Rafinesque 1810 mako shark
var praecurso
Alopecias smithwoodwardi n. sp.1 Bohm 1926 mackerel shark
Lamna barnitzkei n. sp.1 Bohm 1926 mackerel shark
Lamna vincenti1 Winkler 1878 mackerel shark
 Lamniformes - Odontaspididae
"Lamna (Odontaspis) cf. contortidens" = Odontaspis contortidens, Odontaspis winkleri1, "Odontaspis macrota" = Odontaspis macrota1, "Lamna (Odontaspis) cf. elegans" = Odontaspis macrota
"Lamna (Odontaspis) cf. contortidens" = Odontaspis contortidens Agassiz 1843 sand tiger shark
Odontaspis winkleri1 Leriche 1905 sand tiger shark
"Odontaspis macrota" = Odontaspis macrota1 Agassiz 1843 sand tiger shark
"Lamna (Odontaspis) cf. elegans" = Odontaspis macrota Agassiz 1843 sand tiger shark
 Carchariniformes - Carcharhinidae
Carcharias (Aprionodon) frequens1 Dames 1883 requiem shark
Galeocerdo sp.1 Müller and Henle 1837 tiger shark
Galeocerdo latidens1 Agassiz 1843 tiger shark
 Carchariniformes - Scyliorhinidae
Galeus sp.1 Schaeffer 1760 cat shark
Galeus porrectus n. sp.1 Bohm 1926 cat shark
Galeus robustus n. sp.1 Bohm 1926 cat shark
 Heterodontiformes - Heterodontidae
Cestracion vincenti1 Leriche 1905 bullhead shark
 Euselachii -
Odontorhytis pappenheimi n. sp.1 Bohm 1926 elasmobranch
 Hexanchiformes - Hexanchidae
Notidanus serratissimus1 Agassiz 1843 cow shark
 Acipenseriformes -
 Blenniiformes - Blenniidae
Paranarrhichas damesi n. gen. n. sp.1
Paranarrhichas damesi n. gen. n. sp.1 Bohm 1926
 Scombriformes -
Sphyraenodus hastatus n. sp.1 Bohm 1926
 Spariformes - Sparidae
"Chrysophrys blankenhorni n. sp." = Otolithus (Chrysophris)1
"Chrysophrys blankenhorni n. sp." = Otolithus (Chrysophris)1
 Labriformes - Labridae
Labrodon stromeri n. sp.1 Bohm 1926
 Siluriformes - Siluridae
Pimelodus cf. gaudryi1 Leriche 1901 catfish
 Prymnesiophycidae - Prymnesiophycidae