Grignon (Deshayes collection) (Eocene of France)

Where: France (48.8° N, 1.9° E: paleocoordinates 45.7° N, 1.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: NP15 nannofossil zone, Lutetian (47.8 - 41.3 Ma)

• The sediments from the "Falunière de Grignon" are correlated of the Middle Lutetian, according to the identification of biozone NP15 (Aubry 1985). They belong to the regional Zone III and the base of Zone IV of Abrard (1925) and correspond to parasequences A6-A10 of Gely (1996).

• group of beds-level stratigraphic resolution

Environment/lithology: open shallow subtidal; unlithified, calcareous sandstone and unlithified, glauconitic sandstone

Size class: macrofossils

Preservation: original aragonite

Collection methods: Repository: not stated (Deshayes material is apparently lost)

Primary reference: G. P. Deshayes. 1824. Description des Coquilles Fossiles des Environs de Paris, Tome Second: Mollusques 1-80 [M. Clapham/M. Clapham/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 184815: authorized by Matthew Clapham, entered by Matthew Clapham on 25.03.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Cycloneritimorpha - Helicinidae
Helicina dubia Lamarck 1804 snail
 Opisthobranchia - Bullidae
Bulla striatella Lamarck 1804 snail
Bulla ovulata Lamarck 1804 snail
Bulla conulus Deshayes 1824 snail
Bulla cylindroides Deshayes 1824 snail
Bulla cylindrica Bruguière 1792 snail
Bulla coronata Lamarck 1804 snail
 Capuloidea - Capulidae
Pileopsis cornucopiae Lamarck 1802 snail
Pileopsis spirirostris Lamarck 1802 snail
Pileopsis retortella Lamarck 1802 snail
 Calyptraeoidea - Calyptraeidae
"Calyptraea repidularis" = Calyptraea (Turbocalyptraea) crepidularis Lamarck 1802 slipper shell
Calyptraea trochiformis Lamarck 1802 slipper shell
 Rissooidea - Rissoidae
"Bulimus sextonus" = Hydrobia (Tournoueria) sexiona
"Bulimus sextonus" = Hydrobia (Tournoueria) sexiona Lamarck 1804 snail
 Heterostropha - Ringiculidae
Auricula cytharella Lamarck 1804 snail
Auricula hordeola Lamarck 1804 snail
Auricula ovata Lamarck 1804 snail
Auricula miliola Lamarck 1804 snail
  -
Bulimus terebellatus Lamarck 1804 snail
 Fissurelloidea - Fissurellidae
Emarginula costata Lamarck 1802 snail
Fissurella squamosa n. sp. Deshayes 1824 snail
Fissurella costaria n. sp. Deshayes 1824 snail
Fissurella labiata Lamarck 1802 snail
Parmophorus angustus Deshayes 1824 snail
Polyplacophora
 Neoloricata - Chitonidae
Chiton grignionensis Lamarck 1802 chiton
Cyclostoma
  -
Cyclostoma mumia Lamarck 1804
Bullaea
  -
Bullaea striata Deshayes 1824