Ahlten quarry, Niedersachsen (Cretaceous of Germany)

Where: Germany (52.4° N, 9.9° E: paleocoordinates 42.9° N, 10.5° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Late/Upper Campanian (83.5 - 70.6 Ma)

• Ne. bipunctatum/ Gt. roemeri zone

• group of beds-level stratigraphic resolution

Environment/lithology: offshore shelf; lithified, glauconitic wackestone

• The Opoka is interpreted as a shallow marine, pelagic, predominantly biogenic sediment. It was deposited in consequence of the Upper Campanian polyplocum regression during sea-level lowstand as a lateral equivalent of the chalk facies.
• spiculitic, glauconite-bearing wacke-/packstones of the Opoka facies

Size class: macrofossils

Primary reference: B. Niebuhr. 2005. Das Campan (höhere Ober-Kreide) der Lehrter Westmulde bei Hannover. Arbeitskreis Paläontologie Hannover 5-14 [M. Aberhan/S. Nurnberg/S. Nurnberg]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 64215: authorized by Martin Aberhan, entered by Sabine Nürnberg on 04.09.2006, edited by Uta Merkel

Creative Commons license: CC BY (attribution)

Taxonomic list

Demospongiae
 Megalithistida - Pleromatidae
Doryderma (Brochodora) roemeri1 Hinde 1884 demosponge
 Tetralithistida - Siphoniidae
Callopegma acaule1 Zittel 1878 demosponge
listed as C. acaulis
Turonia induta1 Zittel 1878 demosponge
Phymatella bulbosa1 Zittel 1878 demosponge
Phymatella heteropora1 Zittel 1878 demosponge
 Tetralithistida - Plinthosellidae
Plinthosella squamosa1 Zittel 1878 demosponge
 Tetralithistida - Theonellidae
Ragadinia rimosa1 Roemer 1864 demosponge
 Spirosclerophorida - Jereicidae
Jereica polystoma1 Roemer 1864 demosponge
 Spirosclerophorida - Scleritodermatidae
"Verruculina macrommata" = Amphithelion (Amphithelion) macrommata1
"Verruculina macrommata" = Amphithelion (Amphithelion) macrommata1 Roemer 1864 demosponge
 Pachastrellida - Pachastrellidae
Propachastrella primaeva1 Zittel 1878 demosponge
 Choristida - Scolioraphididae
Scolioraphis anastomans1 Zittel 1878 demosponge
Hexactinellida
 Hexactinosa - Aphrocallistidae
Aphrocallistes lobatus n. sp.2 Schrammen 1912 glass sponge
 Innaecoeliida - Craticulariidae
Leptophragma micropora2 Schrammen 1912 glass sponge
Leptophragma murchisoni2 Goldfuss 1831 glass sponge
 Lychniscosa - Ventriculitidae
Sporadoscinia quenstedti2 Schrammen 1912 glass sponge
 Lychniscosa - Coeloptychidae
"Coeloptychium lobatum" = Coeloptychium (Lophoptychium) lobatum2 Goldfuss 1826 glass sponge
Coeloptychium sulciferum2 Roemer 1841 glass sponge
Coeloptychium deciminum2 Roemer 1841 glass sponge
Coeloptychium incisum2 Roemer 1841 glass sponge
"Coeloptychium agaricoides" = Coeloptychium (Coeloptychium) agaricoides2 Goldfuss 1826 glass sponge
Coeloptychium rude2 Zittel 1876 glass sponge
 Lychniscosa - Callodictyonidae
Callodictyon infundibulum2 Zittel 1877 glass sponge
Plocoscyphia centuncula2 Schrammen 1912 glass sponge
"Cyclostigma lobata n. sp." = Callicylix (Cyclostigma) lobata2 Schrammen 1912 glass sponge
Cephalopoda
 Belemnitida - Belemnitellidae
 Ammonitida - Desmoceratidae
Hauericeras fayoli de Grossouvre 1894 ammonite
 Ammonitida - Pachydiscidae
Menuites portlocki Sharp 1855 ammonite
Menuites wittekindi Schlüter 1876 ammonite
 Ammonitida - Scaphitidae
Jeletzkytes compressus Roemer 1841 ammonite
Trachyscaphites pulcherrimus Roemer 1841 ammonite
 Ammonitida - Nostoceratidae
"Nostoceras (Bostrychoceras) polyplocum" = Bostrychoceras polyplocum Roemer 1841 ammonite
Nostoceras (Didymoceras) varium Blaszkiewicz 1980 ammonite
Nostoceras (Didymoceras) postremum Blaszkiewicz 1980 ammonite
 Ammonitida - Diplomoceratidae
Lewyites elegans Moberg 1885 ammonite
Neancyloceras bipunctatum Schlüter 1872 ammonite
Echinoidea
 Holectypoida -
 Holasteroida - Holasteridae
 Spatangoida - Hemiasteridae
Hemiaster sp. Agassiz and Desor 1847 heart urchin