Reuchenette Formation

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Reuchenette Formation
Stratigraphic range: Kimmeridgian,
157 Ma
↓
File:Péry-Reuchenette Oxfordian.JPG
TypeGeological formation
Sub-unitsMembre de Chevenez, Membre de Courtedoux, Marne du Banné, Membre de Vabenau
UnderliesTwannbach Formation
OverliesFormation de Court, Balsthal-Formation, Membre de Porrentruy, Verena-Member, Holzflue-Member, Formation de Courgenay
Thickness140 metres average, 160 m in type area.
Lithology
PrimaryLimestone
OtherMudstone
Location
RegionEurope
CountrySwitzerland

The Reuchenette Formation is a Jurassic geologic formation in Switzerland. It is Kimmeridgian in age and predominantly consists of well stratified limestone, with lithology variable both laterally and stratigraphically including wackestones, packstones and grainstones, as well as mudstone.[1] Dinosaur remains are among the fossils that have been recovered from the formation, including the Turiasaurian sauropod Amanzia greppini, alongside a theropod tooth belonging to Ceratosauria indet, originally assigned to Megalosaurus meriani.[2] teleosaurid crocodyliformes are also known, including Sericodon, Proexochokefalos and Machimosaurus.[3] The metriorhynchid thalatosuchians Torvoneustes[4] and Dakosaurus. The hybodontid shark Asteracanthus.[5] The thalassochelydian turtle Thalassemys[6] and Solnhofia is known from the formation,[7] as is the platychelyid turtles Platychelys,[8] and the plesiochelyid turtle Plesiochelys.[9]

Vertebrate fauna

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Color key
Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon
Notes
Uncertain or tentative taxa are in small text; crossed out taxa are discredited.

Ray-finned fish

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Genus Species Material Notes Images
"Lepidotes" "L". laevis Jaw Fragment Ginglymodi
L. sp. Four enameloid caps of the grinding tooth Ginglymodia
Gyrodus G. "jurassicus" Lower jaw Pycnodontidae File:Gyrodus hexagonus.png
G. sp. Two incisors Pycnodontidae
Proscinetes P. sp. 1 Enameloid cap of grinding tooth, six vomers and four prearticulars Pycnodontidae
File:Proscinetes.png
P. sp. 2 Enameloid cap of grinding tooth, vomer and three prearticulars Pycnodontidae
Pycnodontiforme Indeterminate Enameloid cap of grinding tooth Pycnodontidae
Caturus C. sp. Seven teeth Caturidae
Callopterus C. sp. Tooth Caturidae
Ionoscopus I. sp. Tooth Caturidae
Belonostomus B. sp. Predentary Aspidorhynchidae

Cartilaginous fish

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Genus Species Material Notes Images
Asteracanthus[10] A. udulfensis 149 teeth from different parts of the jaw Acrodontine hybodontiforme with strongly ornamented dentition adapted for crushing hard-shelled prey, so far only known from the Reuchenette Formation
"Hybodus"[10] "H". sp. 101 teeth from different parts of the jaw Hybodontiforme with teeth similar to teeth from "Hybodus" lusitanicus, but they are smaller and slightly different in the bluntness of their main cusp
"H". multicuspidatus 19 mostly incomplete teeth Hybodontiforme whose teeth are very similar to those of Polyacrodus brevicostatus, however that genus is considered a nomen dubium
Planohybodus[10] P. sp. 22 teeth Hybodontiforme that may represent a new species
File:Planohybodus.jpg
cf. Meristodonoides[10] cf. M. sp. 22 teeth Hybodontiforme very similar to Meristodonoides, the teeth are too poorly preserved to properly confirm the inclusion in the genus
Pseudorhina[10] P. sp. One partial tooth Pseudorhina tooth displaying a unique morphology, however too fragmentary to name
P. acanthoderma 69 teeth from different parts of the jaw Large angelshark known best by complete specimens hailing from the contemporary Nusplingen Limestone
P. alifera 27 teeth from different parts of the jaw Medium-sized angelshark known best by complete specimens hailing from the Solnhofen Limestone
File:Pseudorhina alifera 78445.jpg
Protospinax[10] P. sp. Three teeth Squalomorph known from complete specimens hailing from the Solnhofen Limestone, the material from the Swiss Jura is too fragmentary to identify on a species level
File:Protospinax annectens, Paläontologisches Museum München WB.jpg
Heterodontidae[10] Indeterminate One fragment of a fin spine and 5 teeth Indeterminate bullhead shark
Heterodontus[10] H. semirugosus Six anterior teeth Bullhead shark
?Paracestracion[10] ?P. sp. One fin spine Heterodontiforme tentatively referred to Paracestracion
Palaeoscyllium[10] P. cf. formosum 15 teeth from different parts of the jaw Catshark most similar to P. formosum
Corysodon[10] C. cirinensis Four teeth The systematic position of this genus is disputed, its also known from Cerin and Solnhofen
Rhinobatoidea[10] Indeterminate 25 teeth Teeth that could either belong to Belemnobatis or Spathobathis
Belemnobatis[10] B. sismondae 339 teeth from different parts of the jaw Asterodermid known by more complete specimens from Cerin
File:Belemnobatis specimens.jpg
B. morinicus 55 teeth Asterodermid known by more complete specimens from Cerin
Spathobatis[10] S. bugesiacus 157 teeth from different parts of the jaw Asterodermid known by more complete specimens from Cerin
File:Spathobatis specimens.jpg
Ischyodus[10] I. quenstedti 16 fin spines, 34 dental plates, 9 palatine plates and 25 mandibular plates Large chimaera with a wide distribution in Late Jurassic Europe
File:Ischyodus quenstedti 45456.jpg
Laffonia[11] L. helvetica 1 egg capsule Egg capsule similar to those of the modern short-nose chimaera

Reptiles

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Testudinata

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Genus Species Material Notes Images
Craspedochelys C. picteti
C. jaccardi
Plesiochelys P. bigleri
File:Plesiochelys holotype.png
Platychelys P. oberndorferi
Portlandemys P. gracilis
Solnhofia S. brachyrhyncha
Tropidemys T. langii
Thalassemys T. bruntrutana
T. hugii
"T." moseri

Crocodylomorpha

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Genus Species Material Notes Images
Cricosaurus C. suevicus
Dakosaurus D. maximus
Machimosaurus H. hugii
Proexochokefalos P. cf. bouchardi
Sericodon S. jugleri
Torvoneustes T. jurensis
File:Torvoneustes-jurensis-holotype.jpg

Dinosauria

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Genus Species Material Notes Images
Amanzia[2] A. greppini
File:Amanzia Scale.svg
Ceratosauria Indeterminate

Pterosauria

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Genus Species Material Notes Images
Pterodactyloidea Indeterminate Second wing phalanx (NMS 20'870)

Invertebrate Fauna

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Cephalopoda

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Genus Species Material Notes Images

See also

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References

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  • Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp. Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value)..


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