ammonites
Foreshore, Yaverland (Cretaceous of the United Kingdom)

Also known as Caulkicephalus holotype site

Where: England, United Kingdom (50.7° N, 1.1° W: paleocoordinates 41.0° N, 9.5° E)

• coordinate stated in text

When: Wessex Formation (Wealden Group), Barremian (130.0 - 125.5 Ma)

• "The section exposed at Yaverland comprises the upper part of the Wessex Formation and the overlying Vectis Formation of the Wealden Group, with younger beds, representing a marine transgression, exposed to the north-east of the bay. Here the Wessex Formation is of Barremian (Early Cretaceous) age, and comprises a series of variegated mudstones with intermittent fluvial sandstones, silty clays and occasionally plant debris beds. The sequence represents a meander-belt floodplain system with pond and ephemeral lake deposits. The new pterosaur was obtained from one of the plant debris beds (Bed 33 of Radley, 1994)."

• bed-level stratigraphic resolution

Environment/lithology: "floodplain"; conglomerate

• "The plant debris beds are believed to be the result of intrabasinal flood events that transported plant debris and carcasses, depositing them on the floodplains"
• "Typically, the plant debris beds are patchily cemented by nodular siderite, contain abundant intraclasts and a high percentage of plant remains ranging from leaf fragments to logs several metres in length. Both lignite and fusain occur. Pyrite, siderite, calcite and barite are common diagenetic minerals but, unfortunately, the pyrite is unstable and prone to decay in damp conditions."

Size class: macrofossils

Collected by J. D. Winch and others in 1995-2002

Collection methods: surface (float), surface (in situ),

• IWCMS, Isle of Wight County Museum Service at Dinosaur Isle, Sandown, Isle of Wight

Primary reference: L. Steel, D. M. Martill, D. M. Unwin and J. D. Winch. 2005. A new pterodactyloid pterosaur from the Wessex Formation (Lower Cretaceous) of the Isle of Wight, England. Cretaceous Research 26:686-698 [R. Butler/R. Butler] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 90342: authorized by Richard Butler, entered by Richard Butler on 17.07.2009