Sunnydown Farm Quarry (clay: upper horizon; equivalent to DB 102/103 ) (Cretaceous of the United Kingdom)

Also known as Langton Matravers

Where: England, United Kingdom (50.6° N, 2.0° W: paleocoordinates 41.5° N, 7.8° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Worbarrow Tout Member (Lulworth Formation), Middle Berriasian (145.0 - 140.2 Ma)

• Uppermost Lulworth Beds of Casey 1963, lying just below the Cinder Member, the base of which currently marks the Jr/K boundary in Southern England. Section originally published by Ensom 1985. Correlated with horizon DB102 in Durlston Bay.

•Ensom & Sigogneau-Russell (1998, p. 35): The upper horizon lies at the junction of a clay, locally termed the 'Sly', which immediately underlies the 'Cap' bed, 2.6 m below the base of the Cinder Member. This clay-limestone interface can be equated confidently with beds DB 102/103 in Durlston Bay (CLements 1993).

•Cherty Freshwater Mbr now = top of Worbarrow Tout Mbr.

• bed-level stratigraphic resolution

Environment/lithology: lacustrine - small; cherty/siliceous limestone and argillaceous, calcareous claystone

• Conditions of deposition generally brackish or freshwater, though there are occasional appearances of almost normal marine fauna. Clays may represent mud flats bordering a freshwater lake.

•Ensom & Sigogneau-Russell (1998, p. 35): The sedimentology and environmental setting of the upper horizon has been described by West (1988). Both horizons are thought to represent clays bordering shallow freshwater lakes

• A sequence of thin limestones, micrites, argillaceous micrites, calcareous shales and clays. The limestones often contain nodules of chert.

Size classes: macrofossils, mesofossils

Collection methods: bulk, quarrying, sieve,

• 3 tons of clay dug from the floor of the quarry, normally the top 2-4cm were collected.

Primary reference: P. C. Ensom. 1987. A remarkable new vertebrate site in the Purbeck Limestone Formation on the Isle of Purbeck. Proceedings of the Dorset Natural History and Archaeological Society 108:205-206 [J. Alroy/E. Leckey/E. Leckey]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 28401: authorized by John Alroy, entered by Erin Leckey on 12.02.2003, edited by Matthew Carrano, Roger Benson, Richard Butler, John Alroy and Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

• mostly teeth of vertebrates
Chondrichthyes
 Hybodontiformes - Hybodontidae
aff. Hybodus sp. Agassiz 1837 elasmobranch
Pisces
  -
"Pisces indet." = Osteichthyes
"Pisces indet." = Osteichthyes Huxley 1880 bony fish
Osteichthyes
 Temnospondyli - Albanerpetontidae
Celtedens megacephalus11 Costa 1864 tetrapod
DORCM GS26, 30, 32, 33, 35, 37
 Proteida - Batrachosauroididae
Batrachosauroididae indet.6 Auffenberg 1958 tetrapod
"undetermined salamander"
 Salientia -
Sunnybatrachus purbeckensis6 Evans and McGowan 2002 frog
"indeterminate frog"
 Caudata -
Apricosiren ensomi n. gen. n. sp.6
Apricosiren ensomi n. gen. n. sp.6 Evans and McGowan 2002 salamander
Reptilia
 Testudines - Pleurosternidae
? Pleurosternon sp. Owen 1853 turtle
Pleurosternum sic.
 Testudines - Kinosternoidea
Tretosternon sp.2 Owen 1842 mud turtle
 Avetheropoda - Dromaeosauridae
cf. Nuthetes destructor Owen 1854 coelurosaur
 Ornithischia - Heterodontosauridae
Echinodon becklesii2 Owen 1861 heterodontosaurid
 Pterosauria -
Pterosauria indet.8 Kaup 1834 pterosaur
tooth
 Loricata - Goniopholididae
Nannosuchus sp.2 Owen 1879 crocodilian
Goniopholis sp. Owen 1842 crocodilian
 Loricata -
cf. Bernissartia sp.12 Dollo 1883 crocodilian
Theriosuchus sp. Owen 1878 crocodilian
 Squamata -
Squamata "indet. 1"7 Oppel 1811 lizard
Squamata "indet. 2"7 Oppel 1811 lizard
Squamata "indet. 3"7 Oppel 1811 lizard
 Squamata - Dorsetisauridae
Dorsetisaurus sp.3 Hoffstetter 1967 lizard
 Squamata -
Durotrigia sp.2 Hoffstetter 1967 lizard
Parasaurillus pseudobtusus7 Evans and Searle 2002 lizard
Pseudosaurillus sp.3 Hoffstetter 1967 lizard
 Squamata - Paramacellodidae
Paramacellodus sp.2 Hoffstetter 1967 lizard
Becklesius sp.2 Estes 1983 lizard
 Rhynchocephalia - Homoeosauridae
Homoeosaurus sp.3 Meyer 1850 rhynchocephalian
Mammalia
 Morganucodonta -
Purbeckodon batei1 Butler et al. 2012 mammal
DORCM GS 743, broken upper molar; DORCM GS 746, ?last upper molar
 Eutriconodonta - Triconodontidae
Trioracodon sp.1 Simpson 1928 mammal
DORCM GS 610, a right upper molar; DORCM GS 400, mesial part (cusp b) of a left lower molar; DORCM GS 958, mesial end of a lower molar
Triconodon sp.1 Owen 1859 mammal
DORCM GS 639, right upper molar; DORCM GS 1046, mesial part of a right upper molariform; DORCM GS 901, could be the mesial two-thirds of an upper triconodontid premolar, but with weak cingula; DORCM GS 618, a right ?lower molariform
 Theriiformes - Dryolestidae
? Peraspalax sp.2 Owen 1871 mammal
Phascolestes sp.2 Owen 1871 mammal
Amblotherium sp. Owen 1871 mammal
 Theriiformes - Paurodontidae
Dorsetodon haysomi n. gen. n. sp.4
Dorsetodon haysomi n. gen. n. sp.4 Ensom and Sigogneau-Russell 1998 mammal
DORCM GS 433 (holotype right lower molar), 376 (right lower molar), 502 (right lower molar), 438 (left lower molar), 501 (left lower molar), 625 (left lower molar),747 (right lower molar)
 Theriiformes -
Chunnelodon alopekodes n. gen. n. sp.4, Magnimus ensomi n. gen. n. sp.13
Chunnelodon alopekodes n. gen. n. sp.4 Ensom and Sigogneau-Russell 1998 mammal
DORCM GS 378 (holotype left lower molar), 377 (right lower molar)
Magnimus ensomi n. gen. n. sp.13 Sigogneau-Russell 1999 mammal
DORCM GS 627 (type upper molar), 332 (lower right molar), 621 (lower left molar)
 Theriiformes - Spalacotheriidae
Spalacotherium sp.2 Owen 1854 mammal
Spalacotherium evansae n. sp.5 Ensom and Sigogneau-Russell 2000 mammal
DORCM GS 350, 355, sample 28; 488, 490, sample 30; 769, sample 35; 373, sample 40; 370, 371, 842, 843, sample 58; 380, sample 59; 360, 853, sample 61; 383, sample 62; 389, 390, sample 63; 909, sample 71; 914, sample 73; 437, sample 76; 918, sample 75; 721, sample 78; 928, sample 79; 534, 538, sample 88; 961, sample 95; 669, sample 103; 673, 674, sample 104; 684, sample 106; 694, sample 107; 357, sample 109; 435, sample 112; 1043, sample 114; 1075, 1076, 1078, 1081, sample 116; 1110, sample 119.
 Docodonta - Docodontidae
Peraiocynodon sp.2 Simpson 1928 dodocont
?=Docodon sp.
 Multituberculata -
"Plagiaulacoidea indet." = Plagiaulacida10
"Plagiaulacoidea indet." = Plagiaulacida10 Ameghino 1889 multituberculate
DORCM GS 22 and 25 (both partial left p4)
 Multituberculata - Pinheirodontidae
Gerhardodon purbeckensis n. gen. n. sp.9
Gerhardodon purbeckensis n. gen. n. sp.9 Kielan-Jaworowska and Ensom 1992 multituberculate
 Multituberculata - Paulchoffatiidae
Sunnyodon notleyi n. gen. n. sp.9
Sunnyodon notleyi n. gen. n. sp.9 Kielan-Jaworowska and Ensom 1992 multituberculate
 Multituberculata - Plagiaulacidae
"Plagiaulacidae" sp. Gill 1872 multituberculate
Bolodon sp. Owen 1871 multituberculate
Bolodon osborni9 Simpson 1928 multituberculate
 Multituberculata - Albionbaataridae
Albionbaatar denisae n. gen. n. sp.10
Albionbaatar denisae n. gen. n. sp.10 Kielan-Jaworowska and Ensom 1994 multituberculate
DORCM GS 212 (sample 40, holotype right P5 in a fragment of maxilla); DORCM GS 227 (sample 77), right P5; GS 24 (sample 70), ?right ?P3; 282 (sample 78), ?left ?P2; 23 (sample 95), ?left ?P1
Osteichthyes
 Therapsida -
Tinodon micron n. sp.5 Ensom and Sigogneau-Russell 2000 mammaliaform
DORCM GS 1110 (holotype lower left molar), 437, 538, 1081 (partial left molars), 1078 (partial right molar), 694 (upper right molar)