Houdan (Defrance collection) (Eocene of France)

Where: France (48.8° N, 1.6° E: paleocoordinates 45.6° N, 1.9° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Lutetian (47.8 - 41.3 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: carbonate

Size class: macrofossils

Reposited in the MNHN

• Repository: Defrance collection (some of which is now at Musée de Normandie, Caen, or at MNHN Paris)

Primary reference: J. B. Lamarck. 1802. Premier mémoire. Mollusques testacées dont on trouve les dépouilles fossiles dans les environs de Paris. Annales du Muséum National d'Histoire Naturelle 1:308-312 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 184108: authorized by Matthew Clapham, entered by Matthew Clapham on 01.02.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Cerithioidea - Potamididae
"Cerithium tricarinatum" = Potamides (Potamidopsis) tricarinatus2
"Cerithium tricarinatum" = Potamides (Potamidopsis) tricarinatus2 Lamarck 1804 horn snail
 Cerithioidea - Cerithiidae
Cerithium involutum n. sp.3 Lamarck 1804 cerith snail
Cerithium conoideum n. sp.3 Lamarck 1804 cerith snail
Cerithium cinctum3 Bruguière 1792 cerith snail
 Cerithioidea - Thiaridae
Melania hordacea n. sp.4 Lamarck 1804 snail
 Sorbeoconcha - Ficidae
Pyrula subcarinata n. sp.1 Lamarck 1803 fig shell
 Neritoidea - Neritidae
Nerita tricarinata n. sp.5 Lamarck 1804 snail
 Patellogastropoda - Patellidae
Patella pennata n. sp. Lamarck 1802 limpet