Steven C Sweetman

University of Portsmouth · School of the Environment Geography and Geosciences

A amostragem de vários estratos carbonatados da secção dos Arrifes (Bacia do Algarve, Sul de Portugal) permitiu recolher uma associação de vertebrados fósseis inesperadamente rica e diversa. Os novos dados aqui apresentados têm implicações paleoambientais consideráveis e fornecem informações adicionais sobre o ambiente de deposição e paleoecologia...

Study of the Mesozoic ichthyofauna of Portugal commenced in the late 19th century. However, to date it principally comprises descriptions of material from several Jurassic and Lower Cretaceous formations of the Lusitanian Basin and Upper Cretaceous post-rift series on the Western Iberian Margin. Here we report an assemblage of chondrichthyans and o...

The systematic trial and bulk sampling of the Arrifes coastal section (Albufeira, Algarve Basin, Portugal), which exposes a sedimentary succession of late Barremian–early Aptian age, has revealed several horizons yielding vertebrate remains. The description and a detailed palaeoenvironmental evaluation of the collected material as a whole is in pro...

A detailed taxonomic, taphonomic and sedimentological examination of a newly discovered microvertebrate-rich horizon within the non-marine, Lower Cretaceous Wessex Formation (Wealden Group) of Dungy Head, Dorset, aids the ecological and palaeoenvironmental reconstruction of southern England’s Early Cretaceous wetlands. Historically, the Wessex Form...

The Early Cretaceous Wealden Group of Swanage Bay, Dorset, southern England, comprises two formations, a lower Wessex Formation and an overlying Vectis Formation. Presently only part of the former is exposed and here its stratigraphy, sedimentology and palaeontology are redescribed. Recent work on the Wealden Group of the Wessex Sub-basin has focus...

The Cretaceous succession exposed in the cliffs and on the foreshore at Yaverland on the south-east coast of the Isle of Wight is one of the Wessex Sub-basin’s classic vertebrate fossil sites. Its history stretches back to the time of Dean William Buckland who in 1829 just five years after scientifically describing the World’s first dinosaur, Magal...

A remarkably large, derived, metamorphic clast of Palaeozoic aspect weighing approximately 20 kg was recently recovered from a plant debris bed occurring in the Lower Cretaceous (Barremian), fluvial, lacustrine and terrestrial Wessex Formation exposed on the south-west coast of the Isle of Wight, southern England. It is interpreted as a dropstone t...

Two tribosphenic teeth recently recovered from the Purbeck Group ‘Mammal Bed’ (Lower Cretaceous, Berriasian) exposed in Durlston Bay, east Dorset, UK, have been shown to be those of highly derived eutherian mammals. They have been named Durlstotherium newmani and Durlstonodon ensomi. The ‘Mammal Bed’ was, until the latter part of the twentieth cent...

Origin and Significance of Pyrite in Non-Marine Sedimentary Rocks - Project Proposal

2017. Highly derived eutherian mammals from the earliest Cretaceous of southern Britain. Acta Palaeontologica Polonica 62 (4): 657-665. Eutherian mammals (Placentalia and all mammals phylogenetically closer to placentals than to marsupials) comprise the vast majority of extant Mammalia. Among these there is a phenomenal range of forms and sizes, bu...

Eutherian mammals (Placentalia and all mammals phylogenetically closer to placentals than to marsupials) comprise the vast majority of extant Mammalia. Among these there is a phenomenal range of forms and sizes, but the origins of crown group placentals are obscure. They lie within the generally tiny mammals of the Mesozoic, represented for the mos...

NEW SPINOSAURID DINOSAUR FINDS FROM THE WESSEX FORMATION (WEALDEN GROUP, EARLY CRETACEOUS) OF THE ISLE OF WIGHT Martin Munt1, Gary Blackwell1, Josh Clark2, Brian Foster3, Neil Gostling2, Jeremy Lockwood1, Alex Peaker1, Katy Rankin4 & Steve Sweetman5 1Dinosaur Isle Museum, Sandown, Isle of Wight, UK. 2Biological Sciences, University of Southampton,...

The discovery in Surrey of Baryonyx walkeri in 1983 was a highly significant event that reinvigorated the study of British Dinosaurs. In the 1990’s isolated vertebrae and teeth plus a phalanx confirmed the presence of spinosaurids on the Isle of Wight. The Island’s Wessex Formation includes plant debris beds which are the richest dinosaur containin...

A specimen of a pterodactyloid pterosaur from the Upper Tunbridge Wells Sand Formation (Early Cretaceous, Valanginian) of Bexhill, East Sussex, southern England is described. It comprises a small fragment of jaw with teeth, a partial vertebral column and associated incomplete wing bones. The juxtaposition of the bones suggests that the specimen was...

Vertebrates are a highly significant component of the Jehol Biota of northern Hebei, western Liaoning, and southeastern Inner Mongolia. Furthermore, Jehol vertebrate fossils from these areas are remarkable for their abundance and diversity, and for their taphonomy which has resulted in the preservation of large numbers of complete skeletons and of...

The Isle of Wight provides outstanding coastal exposures of Early Cretaceous (Barremian to early Aptian) and Paleogene (Late Paleocene to Early Oligocene) vertebrate-bearing strata. These have yielded Europe's most diverse Early Cretaceous dinosaur assemblage and highly significant Paleogene vertebrate assemblages. Tides and time permit only a brie...

Bulk screening of Lower Cretaceous Wessex Formation (Wealden Group, Barremian) plant debris beds exposed on the south-east and south-west coasts of the Isle of Wight, southern England, has resulted in the recovery of large quantities of isolated chondrichthyan and osteichthyan fish remains. Among these are teeth representing five species of hybodon...

201X. A new bernissartiid crocodyliform from the Lower Cre-taceous Wessex Formation (Wealden Group, Barremian) of the Isle of Wight, southern England. Acta Palaeontologica Polonica XX (X): xxx-xxx. A substantially complete skull of a small crocodyliform recently found on the foreshore near Yaverland on the south-east coast of the Isle of Wight, sou...

1. Character generation and coding methods S.1.2. Character list S.2.1. Data matrix S.3.1. TNT settings S.3.2. TNT results S.3.3. TNT consensus cladogram & agreement subtrees S.3.4. TNT bootstrap cladogram S.3.5. TNT Bremer cladogram S.3.6. TNT implied weighting cladogram S.1.1. The character list is a combination of 216 characters from previously...

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2013. A new albanerpetontid amphibian from the Barremian (Early Cretaceous) Wes− sex Formation of the Isle of Wight, southern England. Acta Palaeontologica Polonica 58 (2): 295–324. A new albanerpetontid, Wesserpeton evansae gen. et sp. nov., from the Early Cretaceous (Barremian) Wessex Formation of the Isle of Wight, southern England, is described...

a b s t r a c t In contrast to the Barremian Wessex Formation on the Isle of Wight, the remains of small theropods are rare in the BerriasianeValanginian Hastings Group of the English mainland. Both units are part of the dinosaur-rich Wealden Supergroup (BerriasianeAptian) of southern Britain. Here we report the cervical vertebra of a small dinosau...

An introduction to the Wealden Group (Lower Cretaceous, Barremian) of the isle of Wight, southern England.

A summary of vertebrate microfossils occurring in the Lower Cretaceous Wealden Supergroup of southern England with notes on techniques used in the recovery of microvertebrate remains.

An introduction to vertebrates occurring in the Lower Cretaceous Wealden Supergroup of southern England.

A summary of sharks occurring in the Lower Cretaceous Wealden Supergroup of southern England.

A summary of bony fishes occurring in the Lower Cretaceous Wealden Supergroup of southern England.

A summary of lissamphibians occurring in the Lower Cretaceous Wealden Supergroup of southern England.

A summary of lizards occurring in the Lower Cretaceous Wealden Supergroup of southern England.

A summary of mammals occurring in the Lower Cretaceous Wealden Supergroup of southern England.

Screening of large quantities of sediment for studies of the plant debris beds of the Wessex Formation (Wealden Group, Barremian) on the Isle of Wight and their associated vertebrate and invertebrate fauna has revealed hitherto unknown nonmarine ostracod assemblages. One of these includes a notodromadine constituting the oldest known evidence of hy...

The aim of the excursion was to examine a diverse range of sedimentary facies and sand body architectures in the non-marine Wealden Group. This includes fluvial sand body geometry, pedogenic fabrics, soft sediment deformation features, and bioturbation structures in the Wessex Formation as well as wave- and tidally-influenced estuarine sandstones a...

The Early Cretaceous (Barremian) Wessex Formation of the Isle of Wight primarily represents high sinuosity fluvial, but also lacustrine and terrestrial deposition on a low relief floodplain occupying half grabens, with active normal faults immediately to the north. Plant debris beds form a very small proportion of the succession but are the main so...

Spinosaurs were large theropod dinosaurs showing peculiar specializations, including somewhat crocodile-like elongate jaws and conical teeth. Their biology has been much discussed, and a piscivorous diet has been suggested on the basis of,jaw as well as tooth morphology and stomach contents. Although fish eating has been considered plausible, an aq...

Micropalaeontological processing of vertebrate-bearing horizons within the Early Cretaceous (Barremian) Wessex Formation of the Isle of Wight, southern England, reveals a rare, but diverse assemblage of pterosaurs. Besides the previously known euorni-thocheiran Caulkicephalus, the new material demonstrates the presence of three species of istiodact...

Sweetman, S.C. 2009. A new species of the plagiaulacoid multituberculate mammal Eobaatar from the Early Cretaceous of southern Britain. Acta Palaeontologica Polonica 54 (3): 373–384. DOI: 10.4202/app.2008.0003. Until recently, the only mammal remains to be obtained from the Early Cretaceous (Barremian, Wealden Group) Wessex Formation of the Isle of...

Bones of large reptiles, later to be called dinosaurs, derived from the Early Cretaceous (Barremian) Wessex Formation of the Isle of Wight were first described as long ago as 1829. Since that time remains representing almost 30 species of dinosaur have been recovered and described although much of the material representing them is fragmentary and s...

A field guide produced for the Society of Vertebrate Paleontology field trip to the Isle of Wight in 2009.

Bulk screening of Early Cretaceous (Barremian) Wealden Group strata of the Wessex Formation exposed on the south-west and south-east coasts of the Isle of Wight, southern England, has resulted in the recovery of fragmentary remains pertaining to a new spalacolestine spalacotheriid mammal, Yaverlestes gassoni gen. et sp. nov. These represent the fir...

  Bulk screening of Early Cretaceous (Barremian) strata of the Wessex Formation, exposed in sections on the south-west and south-east coasts of the Isle of Wight, southern England, has resulted in the recovery of mammal remains, the first to be obtained from Wealden Group strata since the early 1970s. The fauna comprises at least six taxa represent...

Bulk screening of Early Cretaceous (Barremian) Wessex Formation strata exposed on the south-east coast of the Isle of Wight, southern England, has resulted in the recovery of neoselachian shark teeth referred to the scyliorhinid Palaeoscyllium. These are the first neoselachian remains from the British Wealden Group and represent the geologically ol...

Velociraptorine dromaeosaurid dinosaur teeth are reported for the first time from the Wessex Formation (Early Cretaceous, Barremian) of the Isle of Wight, southern England. They represent the second record of the Dromaeosauridae in Britain and the first of this clade from strata of the British Wealden Group.