The hexactinellid sponge Cystispongia bursa (Quenstedt 1852) from the Turonian and Lower Coniacian (Upper Cretaceous) of northern Germany and England

2001 ◽  
Vol 22 (3) ◽  
pp. 377-387 ◽  
Author(s):  
Frank Wiese ◽  
Christopher J. Wood
Keyword(s):  
Upper Cretaceous ◽  
Northern Germany ◽  
Hexactinellid Sponge

Revision of Hamites wernickei (Cephalopoda, Ancyloceratina) from the classic Lüneburg section (Upper Cretaceous, northern Germany)

2016 ◽  
Vol 66 (4) ◽  
pp. 627-644
Author(s):  
Birgit Niebuhr ◽  
John W.M. Jagt
Keyword(s):  
Upper Cretaceous ◽  
Typical Feature ◽  
Geographic Range ◽  
Northern Spain ◽  
Northern Germany ◽  
Southern France ◽  
Type Series ◽  
Upper Austria ◽  
Upper Campanian

Abstract A re-examination of heteromorph ammonites of late Campanian age from the Zeltberg section at Lüneburg has demonstrated that the type series of Hamites wernickei in fact comprises two different species that are here assigned to the nostoceratid Nostoceras Hyatt, 1894 and the polyptychoceratid Oxybeloceras Hyatt, 1900. Nostoceras (Didymoceras) wernickei (Wollemann, 1902) comb. nov., to which three of the four specimens that were described and illustrated by Wollemann (1902) belong, has irregularities of ribbing and tuberculation and changes its direction of growth at the transition from the helicoidal whorls to the hook, which is a typical feature of members of the subfamily Nostoceratinae. Torsion of body chambers is not developed in hairpin-shaped ammonite species, which means that the species name wernickei is no longer available for such polyptychoceratine diplomoceratids. Consequently, the fourth specimen figured and assigned to Hamites wernickei by Wollemann (1902) is here transferred to Oxybeloceras and considered conspecific to material from the Hannover area (Lehrte West Syncline) as O. aff. crassum (Whitfield, 1877). In addition to the “Heteroceras-Schicht des Mucronaten-Senons” of Lüneburg (bipunctatum/roemeri Zone, upper upper Campanian), the geographic range of N. (D.) wernickei probably includes Upper Austria, Tunisia and the Donbass region, while O. aff. crassum is known from the Hannover area (northern Germany), southern France, northern Spain and Upper Austria.

An unusual Upper Cretaceous (Santonian) hexactinellid sponge from the Great Valley sequence, western Sacramento Valley, Northern California

1996 ◽  
Vol 70 (5) ◽  
pp. 713-717 ◽  
Author(s):  
J. Keith Rigby ◽  
Patrick Embree ◽  
Michael Murphy
Keyword(s):  
Upper Cretaceous ◽  
New Genus ◽  
Single Layer ◽  
Skeletal Structure ◽  
Early Paleozoic ◽  
The West ◽  
West Side ◽  
Sacramento Valley ◽  
Hexactinellid Sponge ◽  
Great Valley

The new farreid hexactinellid sponge Hormathospongia dictyota new genus and new species, is described from the upper Santonian Dobbins Shale Member of the Forbes Formation of the Upper Cretaceous Great Valley Sequence from the west side of the Sacramento Valley, northwest of Sacramento. The relatively simple skeleton is composed of quadrangularly arranged hexactines with overlapping rays, an arrangement strikingly similar to the skeletal structure of early Paleozoic reticulosid hexactinellids. However, the California Cretaceous sponges clearly show those spicules embedded in siliceous beams that are united to form a solid dictyonal skeletal framework of only a single layer of regular mesh. Such an occurrence and stratigraphic relationships suggests that the dictyonine sponges had their origin from the simply spiculed reticulosid hexactinellids rather than from the more complex dictyosponges.

scholarly journals Marine vertebrates from the Santonian coastal carbonates of northwestern Germany – a tool for the reconstruction of a Proto- North Sea Basin intertidal dinosaur-exchange bridge

2015 ◽  
Vol 7 (1) ◽  
Author(s):  
Cajus G. Diedrich ◽  
Udo Scheer
Keyword(s):  
North Sea ◽  
Upper Cretaceous ◽  
Milankovitch Cycles ◽  
Rhenish Massif ◽  
Carbonate Sand ◽  
Northern Germany ◽  
Theropod Dinosaur ◽  
Intertidal Zones ◽  
Vertebrate Fauna ◽  
Shark Teeth

AbstractA diverse vertebrate fauna, dominated by shark teeth, is recorded from conglomerates within the limestones of the Upper Cretaceous (Santonian) Burgsteinfurt Formation of northwestern Germany. The conglomerate beds comprise carbonatic, glauconitic and phosphate nodules, as well as Triassic, Jurassic and Cretaceous extraclasts. The Burgsteinfurt Formation conglomerates contain fining-upwards parasequences 2–20 cm in thickness, interpreted as tempestite layers within a unit formed by larger-scale Milankovitch Cycles. The presence of the inoceramid Sphenoceramus patootensis and belemnite Gonioteuthis granulata indicate a late Santonian age for the unit. The studied vertebrate fauna from the Weiner Esch locality consists of 20 selachian species (14 macroselachians and 6 microselachians), a few teleosts, rare marine mosasaur remains, and one tooth from a theropod dinosaur. 95% of the vertebrates in the assemblage are depositionally autochthonous, with the remaining material reworked from older underlying Cenomanian–Coniacian (lower Upper Cretaceous) limestones. On the basis of observed sedimentary structures, the scarcity of deep-sea selachians, and the dominance of the Mitsukurinidae (59% of the preserved shark fauna) in the fossil assemblage, the unit is interpreted as a shallow (0–3 metres deep), subtidal, nearshore environment, or even subaerial carbonate-sand islands, located on the southern margin of a submarine swell. The presence of a Santonian theropod in this deposit, and other dinosaur records in northern Germany, together support the interpretation of a short-lived uplift event with strong upwelling influence for the Northwestphalian-Lippe submarine swell north of the Rhenish Massif in the southern Proto- North Sea Basin. A new migration model for dinosaurs moving along carbonate coasts or intertidal zones of shallow carbonate-sand islands in Central Europe is presented, which may explain the scattered distribution of dinosaur remains across Europe in the Upper Cretaceous.

Sign in / Sign up

Export Citation Format

Share Document