Also known as Hordwell
Where: England, United Kingdom (50.7° N, 1.6° W: paleocoordinates 49.2° N, 5.5° W)
• coordinate based on nearby landmark
• local area-level geographic resolution
When: Headon Beds Formation, Priabonian (38.0 - 33.9 Ma)
• part of the Lower Headon Beds, this bed is approx. 6 m above the base, and is is approx. 2m thick. At this locality the Crocodile Bed lies above the Leaf Bed and almost immediately below the upper ironsone band. Age is Upper Eocene (Lower Ludian)
• bed-level stratigraphic resolution
Environment/lithology: terrestrial; white sandstone and concretionary, ferruginous, sandy, calcareous claystone
Size classes: macrofossils, mesofossils
Collection methods: stratigraphic relationships are based on compilation by Cray, 1973.
•In 1852, the Marchioness of Hastings published an almost identical paper to her 1853 report. I used the later English version, but the earlier paper is the more primary reference.
Primary reference: S. Wood. 1844. Record of the discovery of an Alligator with several new Mammalia in the Freshwater Strata at Hordwell. Annals and Magazine of Natural History 14:349-351 [J. Alroy/E. Leckey/M. Uhen]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 39643: authorized by John Alroy, entered by Erin Leckey on 01.06.2004, edited by David Nicholson and Bethany Allen
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Spalacodon sp. n. gen., Helix labyrinthicus9, Helix striatella9, Potomomya subangulata9, Potomomya piapa9, Potomomya angulata4, Plantae indet.4
Plantae indet.4 Haeckel 1866 | |
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Actinopteri | |
Lepisosteus sp. Agassiz 1843 gar | |
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Aves | |
Aves indet.4 Linnaeus 1758 bird two different humeri, coracoids and various other undescribed bird bones
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Reptilia | |
"Crocodilus hastingsiae n. sp." = Diplocynodon hantoniensis8
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Alligator hantoniensis n. sp.
Alligator hantoniensis n. sp. Wood 1846 alligator most of the "head" with almost all of the upper teeth, humerus, dermal scutes and other post cranial elements
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"Trionyx henrici n. sp." = Trionyx henrici4, "Trionyx barbarae n. sp." = Trionyx henrici4, "Trionyx marginatus n. sp." = Trionyx henrici4, "Trionyx circumsulcatus n. sp." = Trionyx henrici4
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Trachyaspis hantoniensis n. sp.5
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"Anostira anglica n. sp." = Allaeochelys delheidi5
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"Emys crassus" = Cuvierichelys crassa4
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Mammalia | |
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Microchoerus erinaceus n. gen. n. sp.
Microchoerus erinaceus n. gen. n. sp. Wood 1844 tarsier "an imperfect cranium": entered as "Microchaerus'
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Quercygale hastingsiae1 placental some type of seal,isolated teeth; ref 10850 has part of a carnivore skull
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Argillotherium toliapicum2 Davies 1884 creodont not clear if this is a new taxon or not, a "mutilated skull"
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Dichodon cuspidatus n. gen. n. sp.7
Dichodon cuspidatus n. gen. n. sp.7 Owen 1847 even-toed ungulate lower jaw and teeth, parts of the upper jaw and teeth
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Palaeotherium sp., Palaeotherium muehlbergi1, Palaeotherium cf. medium7, "Paloplotherium sp." = Plagiolophus (Paloplotherium)4, "Paloplotherium annectens n. gen. n. sp." = Plagiolophus (Paloplotherium)7
Palaeotherium muehlbergi1 Stehlin 1904 odd-toed ungulate some fragments of inferior molar teeth of a smaller Palaeotherioid, among which was an entire crown
"Paloplotherium sp." = Plagiolophus (Paloplotherium)4 odd-toed ungulate "new species" a series of jaws and bones
"Paloplotherium annectens n. gen. n. sp." = Plagiolophus (Paloplotherium)7 odd-toed ungulate portion of the skull and upper teeth
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Polychaeta | |
Gastropoda | |
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Potamides cinctum9, Potamides duplex9, Potamides funatum9, "Potamides margaritaceus" = Mesohalina margaritaceus9
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Ancylus elegans9, Planorbis euomphalus9, Planorbis ? hemistoma9, Planorbis leus9, Planorbis obtusus9, Planorbis planalatus9, Planorbis platystoma9, Planorbis ? rotundatus9
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Bivalvia | |
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"Cyclas exigua" = Lucina (Cyclas)9
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Limnaea | |