crac-greensand (Cretaceous of the United Kingdom)

Where: England, United Kingdom (50.6° N, 1.3° W: paleocoordinates 40.3° N, 9.5° E)

• small collection-level geographic resolution

When: Crackers Member (Atherfield Clay Formation), Aptian (125.0 - 113.0 Ma)

• part of author's Atherfield Clay Series

• bed-level stratigraphic resolution

Environment/lithology: marine; gray shale

Size class: mesofossils

Primary reference: R. Casey. 1961. The stratigraphical palaeontology of the Lower Greensand. Palaeontology 3(4):487-621 [M. Patzkowsky/K. Layou/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 1747: authorized by Mark Patzkowsky, entered by Karen Layou on 07.06.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Asteroidea
 Paxillosida - Astropectinidae
Lophidiaster sp. Spencer 1913 sea star
Echinoidea
 Calycina -
Malacostraca
 Decapoda - Glaessneropsidae
Vectis wrighti Withers 1946 crab
Thecostraca
 Scalpellomorpha - Scalpellidae
Virgiscalpellum wrighti Withers 1946 barnacle
 Calanticomorpha - Cretiscalpellidae
Cretiscalpellum sp. Withers 1922 barnacle
Bivalvia
 Arcida - Cucullaeidae
 Arcida - Parallelodontidae
 Ostreida - Bakevelliidae
Gervillella sublanceolata d'Orbigny 1850 oyster
 Mytilida - Mytilidae
 Trigoniida - Steinmanellidae
 Carditida - Crassatellidae
Mediraon sulcatum n. sp. clam
"sulcatum sp.nov." - originally entered as "Mediraon sulcatum sp.nov."
 Lucinida - Mactromyidae
Thetironia minor Sowerby 1826 clam
 Solenida - Pharidae
 Cardiida - Veneridae
Resatrix parva venus clam
Resatrix vectensis venus clam
 Cardiida - Arcticidae
 Cardiida - Icanotiidae
 Cardiida - Cardiidae
 Pholadomyida - Pholadomyidae
Pholadomya gigantea Sowerby 1836 clam
Cephalopoda
 Ammonitida - Deshayesitidae
Deshayesites callidiscus n. sp. ammonite
"callidiscus sp. nov." - originally entered as "Deshayesites callidiscus sp. nov."
Deshayesites forbesi n. sp. ammonite
"forbesi sp. nov." - originally entered as "Deshayesites forbesi sp. nov."
 Ammonitida - Douvilleiceratidae
Roloboceras hambrovi Forbes 1845 ammonite
 Ammonitida - Ancyloceratidae
Ancyloceras mantelli Casey 1960 ammonite
very rare
 Ammonitida - Oppeliidae
Aconeceras nisoides Sarasin 1893 ammonite
very rare
cf. Aconeceras haugi Sarasin 1893 ammonite
very rare - originally entered as "Aconeceras cf. haugi"
 Diplobelida - Diplobelidae
"Conoteuthis vectensis" = Vectibelus vectensis, Conoteuthis sp., "Conoteuthis dupiniana" = Conoteuthis dupinianus
"Conoteuthis vectensis" = Vectibelus vectensis Spath 1939 belemnite
Conoteuthis sp. belemnite
"Conoteuthis dupiniana" = Conoteuthis dupinianus d'Orbigny 1842 belemnite
Gastropoda
 Cerithioidea - Turritellidae
Mesalia neocomiensis turret shell
 Architaenioglossa - Ampullinidae
 Sorbeoconcha - Acteoninidae
"Ovactaeonina forbesiana" = Colostracon (Ovactaeonina)
"Ovactaeonina forbesiana" = Colostracon (Ovactaeonina) snail
 Sorbeoconcha - Procerithiidae
"Uchauxia forbesiana" = Procerithium
"Uchauxia forbesiana" = Procerithium snail
 Sorbeoconcha - Cassiopidae
Cassiope pizuetana snail
very rare
 Sorbeoconcha - Aporrhaidae
 Heterostropha - Bullinidae
 Heterostropha - Acteonidae