Bathonien

Acrosalenia_hemicidaroides Stage : Bathonian 167.7 Ma to around 164.7 Ma (million years ago) .

A lampshell of the genus Acanthothiris, Class Rhynchonellata, Order Rhynchonellida, Family Acanthothirididae, 20mm along the axis, view of the pedunculate valve, from Woodeaton, Oxfordshire, UK, middle Middle Jurassic (Bathonian)

A lampshell of the genus Acanthothiris, Class Rhynchonellata, Order Rhynchonellida, Family Acanthothirididae, 20mm along the axis, view of the opening, from Woodeaton, Oxfordshire, UK, middle Middle Jurassic (Bathonian)

A lampshell of the genus Acanthothiris, Class Rhynchonellata, Order Rhynchonellida, Family Acanthothirididae, 20mm along the axis, lateral view, from Woodeaton, Oxfordshire, UK, middle Middle Jurassic (Bathonian)

A lampshell of the genus Acanthothiris, Class Rhynchonellata, Order Rhynchonellida, Family Acanthothirididae, 20mm along the axis, view of the hinge, from Woodeaton, Oxfordshire, UK, middle Middle Jurassic (Bathonian)

A lampshell of the genus Acanthothiris, Class Rhynchonellata, Order Rhynchonellida, Family Acanthothirididae, 20mm along the axis, view of the brachial valve, from Woodeaton, Oxfordshire, UK, middle Middle Jurassic (Bathonian)

An atypical (without intertidal and supratidal environment) carbonate platform settles down along the margin. Shallow water oolithes and oncoids are deposited in a narrow zone between a basin with Cancellophycus to the north and a marine/swampy plain with abundants mollusc fauna. However the Mytilus formation, rich in bathonian and callovian foraminifera (Septfontaine, 1984 etc.), develop thick limestone beds tenth of meter above, wrongly attributed to the upper Jurassic. See discussion in Septfontaine (1984).

Reconstruceted skull of Dubreuillosaurus illustrating known (white) and unknown (grey) material. Scale bar is 10cm. Based of figures and description of Allain (2002) "Discovery of megalosaur (Dinosauria, Theropoda) in the middle Bathonian of Normandy (France) and its implications for the phylogeny of basal Tetanurae"

Tetanuran theropod Cruxicheiros newmanorum gen. et sp. nov. axial vertebrae (WARMS 15771) from the Chipping Norton Limestone Formation, Bathonian of the United Kingdom. A. Posterior cervical or anterior dorsal vertebra in posterior view. B. Partial middle−posterior dorsal vertebra in right lat− eral view showing a sagittal cross−section (B1) and in dorsal view (B2). C. Middle−distal caudal vertebra in left lateral (C1) and posterior (C2) views. D. Mid− dle−posterior dorsal neural arch in anterior (D1), right lateral (D2, D3), and posterior (D4) views. Photographs (A, B1, B2, C1, C2, D1, D2, D4) and line drawing (D3). Crossed−hatching indicates matrix and grey tone indicates broken bone.

Locality map for Australian eurypodan thyreophoran fossils. 1, Stegosaurian? footprint (QM F5701), Walloon Coal Measures, Balgowan Colliery, Balgowan (Bajocian–Bathonian); 2, Minmi paravertebra holotype (QM F10329) (Molnar, 1980), Minmi Member, Bungil Formation (Valanginian–Barremian); 3, Thyreophoran trackways, Broome Sandstone, Dampier Peninsula, Western Australia (Valanginian–Barremian); 4, Ankylosauria indet. (see Barrett et al., 2010) ‘Flat Rocks’ Wonthaggi Formation (upper Hauterivian–Albian); 5, NMV P216739, ‘Lake Copco–Dinosaur Cove’ Eumeralla Formation (middle upper Aptian to lower middle Albian) (Barrett et al., 2010); 6, QM F33286; 7, AM F119849 and AM F35259; 8, Kunbarrasaurus ieversi gen. et sp. nov. (formerly Minmi sp.) (QM F18101); 9, QM F33565 and QM F33566; 10, QM F44324-28. Legend: Dark Green, Toolebuc Formation (late middle–early late Albian); Green, Allaru Formation (upper Albian–(?)lower Cenomanian); Light green, Mackunda Formation (upper Albian–lower Cenomanian); Lightest green, Winton Formation (late Albian–early Turonian).