# Lulworth Formation

The Lulworth Formation is a geologic formation in England. It dates from the late Tithonian to the mid Berriasian. It is a subunit of the Purbeck Group. In Dorset, it consists of three members, which are in ascending order, the Mupe Member, the Ridgway Member, and the Warbarrow Tout Member. The Mupe Member is typically 11 to 16 m thick and largely consists of marls and micrites with interbeds of calcareous mudstone. The Ridgeway Member is about 3 to 7 m thick and consists of in its western portion carbonaceous muds, marls and micrites, in the east the muds are replaced by micritic limestone. The Warbarrow Tout Member is 17 to 39 m thick and consists of limestone at the base and micrite and mudstone for the rest of the sequence, this member is the primary source of the vertebrate fossils within the formation. Elsewhere the unit is undifferentiated.

## Vertebrate paleobiota
### Amphibians

Amphibians reported from the Lulworth Formation :
| Genus | Species | Stratigraphic position | Notes |
| Apricosiren | A. ensomi | Worbarrow Tout Member | Salamander |
| Celtedens | C. megacephalus | Worbarrow Tout Member | Albanerpetontid |
| Sunnybatrachus | S. purbeckensis | Worbarrow Tout Member | Frog, affinites to Discoglossidae |
| ?Batrachosauroididae | Indeterminate | Worbarrow Tout Member | Salamander |

### Turtles

Turtles reported from the Lulworth Formation :
| Genus | Species | Notes |
| Dorsetochelys | D. typocardium, D. delairi | Both species probably represent the same taxon |
| Helochelydra | H. anglica | |
| Hylaeochelys | H. latiscutata | |
| Pleurosternon | P. bullocki | |

### Lepidosaurs

Lepidosaurs reported from the Lulworth Formation :
| Genus | Species | Notes |
| Becklesius | Indeterminate | |
| Dorsetisaurus | D. hebetidens, D. purbeckensis | |
| Durotrigia | D. triconidens | |
| Homoeosaurus | Indeterminate | Rhynchocephalian |
| Opisthias | Indeterminate | Rhynchocephalian |
| Paramacellodus | P. oweni | |
| Parasaurillus | P. pseudobtusus | |
| Parviraptor | P. estesi | Stem-snake |
| Pseudosaurillus | P. becklesi | |
| Purbicella | P. ragei | |
| Saurillus | S. robustidens | |

### Crocodyliformes

Crocodyliformes reported from the Lulworth Formation :
| Genus | Species | Material |
| cf. Bernissartia | Indeterminate | Teeth |
| Goniopholis | Indeterminate | |
| Nannosuchus | N. gracilidens | |
| Theriosuchus | T. pusillus | |

### Dinosaurs

Dinosaurs reported from the Lulworth Formation :
| Genus | Species | Location | Material | Notes |
| Echinodon | E. becklesii | Durlston Bay, Swanage | Teeth and dentary | A small heterodontosaurid |
| Owenodon | O. hoggii | Durlston Bay, Swanage | Partial dentary | An iguanodontoid |
| Nuthetes | N. destructor | Feather Quarry, Durlston Bay, Swanage | Teeth, dentary fragment | Small dromaeosaur |

### Mammals

Mammals reported from the Lulworth Formation :
| Genus | Species | Location | Notes |
| Albionbaatar | A. denisae | Sunnydown Farm Quarry | Albionbaataridae |
| Amblotherium | A. pusillum, A. soricinum, A. nanum | Mammal Bed | |
| Bolodon | B. minor, B. crassidens, B. osborni, B. elongatus, B. falconeri | Mammal Bed | Plagiaulacidae |
| Chunnelodon | C. alopekodes | Sunnydown Farm Quarry | |
| Ctenacodon | C. minor | Mammal Bed | Allodontidae |
| Dorsetodon | D. haysomi | Sunnydown Farm Quarry | Paurodontidae |
| Durlstotherium | D. newmani | Mammal Bed | |
| Durlstodon | D. ensomi | Mammal Bed | |
| Gerhardodon | G. purbeckensis | Sunnydown Farm Quarry | Pinheirodontidae |
| Kouriogenys | K. minor | Mammal Bed | Peramuridae |
| Magnimus | M. ensomi | Sunnydown Farm Quarry | |
| Peraiocynodon | P. inexpectatus | Mammal Bed | Docodontidae |
| Peramuroides | P. tenuiscus | Mammal Bed | Peramuridae |
| Peramus | P. tenuirostris, P. dubius, P. minor | Mammal Bed | Peramuridae |
| Peraspalax | P. talpoides | Mammal Bed, Sunnydown Farm Quarry | Dryolestidae |
| Phascolestes | P. mustelula | Mammal Bed, Sunnydown Farm Quarry | Dryolestidae |
| Plagiaulax | P. becklesii | Mammal Bed | Plagiaulacidae |
| Purbeckodon | P. batei | Sunnydown Farm Quarry | Morganucodonta |
| Spalacotherium | S. tricuspidens, S. evansae, S. hookeri | Mammal Bed, Sunnydown Farm Quarry | Spalacotheriidae |
| Sunnyodon | S. notleyi | Sunnydown Farm Quarry | Paulchoffatiidae |
| Thereuodon | T. taraktes | Sunnydown Farm Quarry | |
| Tinodon | T. micron | Sunnydown Farm Quarry | Tinodontidae |
| Triconodon | T. mordax | Mammal Bed, Sunnydown Farm Quarry | |
| Trioracodon | T. bisulcus, T. major, T. oweni | Mammal Bed, Feather Quarry | |