Smallmouth Sands (BMNH) (Jurassic of the United Kingdom)

Also known as Ceteosaurus humero-cristatus type

Where: England, United Kingdom (50.6° N, 2.5° W: paleocoordinates 41.3° N, 7.6° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Rasenia cymodoce ammonoid zone, Lower Member (Kimmeridge Clay Formation), Late/Upper Kimmeridgian (155.7 - 150.8 Ma)

• ?mutabilis Zone or cymodoce zone; "Gigantosaurus" materials from the "gritty clay bed" = Wyke Siltstone

• group of beds-level stratigraphic resolution

Environment/lithology: marine; concretionary, silty claystone

• Duriatitan materials described as "enveloped in large septarian masses", but whether sandstone or claystone is not indicated

Size class: macrofossils

Collected by R. I. Smith, R. Damon in 1873; reposited in the BMNH

Collection methods: mechanical,

Primary reference: J. W. Hulke. 1874. Note on a very large saurian limb-bone adapted for progression upon land, from the Kimmeridge Clay of Weymouth, Dorset. Quarterly Journal of the Geological Society of London 30:16-17 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 26795: authorized by Matthew Carrano, entered by Matthew Carrano on 01.11.2002, edited by Jonathan Tennant, Philip Mannion and Evangelos Vlachos

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Ostreida - Gryphaeidae
"Ostrea deltoidea" = Deltoideum (Deltoideum) delta2
"Ostrea deltoidea" = Deltoideum (Deltoideum) delta2 Smith 1817 oyster
Reptilia
 Testudines - Thalassemydidae
Pelobatochelys blakii n. sp.1 Seeley 1875 turtle
 Saurischia -
"Cetiosaurus humerocristatus n. sp." = Duriatitan humerocristatus, Gigantosaurus megalonyx2
"Cetiosaurus humerocristatus n. sp." = Duriatitan humerocristatus Lydekker 1888 sauropod
"Ceteosaurus humero-cristatus"; BMNH 44635
Gigantosaurus megalonyx2 Seeley 1869 giant lizard
could be same as Duriatitan materials
 Loricata -
Crocodylomorpha indet.3 Hay 1930 crocodilian
Teeth and scutes
Machimosaurus sp.4 marine crocodile
NHMUK PV R1774 (tooth)
 Loricata - Metriorhynchidae
Geosaurus sp.5 Cuvier 1824 marine crocodile
NHMUK PV R36638, isolated tooth