Reuchenette Formation

{{Short description|Jurassic-era geologic formation in Switzerland}}

{{Infobox rockunit

| name = Reuchenette Formation

| image =Péry-Reuchenette Oxfordian.JPG

| caption =

| type = Geological formation

| age = Kimmeridgian,
{{fossilrange|157}}

| period = Kimmeridgian

| prilithology = Limestone

| otherlithology = Mudstone

| namedfor =

| namedby =

| region = Europe

| country = Switzerland

| coordinates =

| unitof =

| subunits = Membre de Chevenez, Membre de Courtedoux, Marne du Banné, Membre de Vabenau

| underlies = Twannbach Formation

| overlies = Formation de Court, Balsthal-Formation, Membre de Porrentruy, Verena-Member, Holzflue-Member, Formation de Courgenay

| thickness = 140 metres average, 160 m in type area.

| extent =

| area =

| map =

| map_caption =

}}

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.{{Cite web|url=https://www.strati.ch/en/show/jur/jur/reuchenette-formation-de-...|title=Reuchenette Formation|last=|first=|date=|website=strati.ch|archive-url=|archive-date=|access-date=}} 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.{{Cite journal|last1=Schwarz|first1=Daniela|last2=Mannion|first2=Philip D.|last3=Wings|first3=Oliver|last4=Meyer|first4=Christian A.|date=December 2020|title=Re-description of the sauropod dinosaur Amanzia ("Ornithopsis/Cetiosauriscus") greppini n. gen. and other vertebrate remains from the Kimmeridgian (Late Jurassic) Reuchenette Formation of Moutier, Switzerland|journal=Swiss Journal of Geosciences|language=en|volume=113|issue=1|pages=2|doi=10.1186/s00015-020-00355-5|issn=1661-8726|doi-access=free|bibcode=2020SwJG..113....2S }} teleosaurid crocodyliformes are also known, including Sericodon, Proexochokefalos and Machimosaurus.{{cite journal|last1=Johnson|first1=Michela M.|last2=Young|first2=Mark T.|last3=Brusatte|first3=Stephen L.|date=2020|title=The phylogenetics of Teleosauroidea (Crocodylomorpha, Thalattosuchia) and implications for their ecology and evolution|journal=PeerJ|volume=8|pages=e9808| pmid=33083104| doi=10.7717/peerj.9808|pmc=7548081 |doi-access=free}} The metriorhynchid thalatosuchians Torvoneustes{{Cite journal|last1=Girard |first1=L. C. |last2=De Sousa Oliveira |first2=S. |last3=Raselli |first3=I. |last4=Martin |first4=J. E. |last5=Anquetin |first5=J. |year=2023 |title=Description and phylogenetic relationships of a new species of Torvoneustes (Crocodylomorpha, Thalattosuchia) from the Kimmeridgian of Switzerland |journal=PeerJ |volume=11 |at=e15512 |doi=10.7717/peerj.15512 |pmid=37483966 |pmc=10362849 |doi-access=free }} and Dakosaurus. The hybodontid shark Asteracanthus.{{Cite journal|author1=Léa Leuzinger |author2=Gilles Cuny |author3=Evgeny Popov |author4=Jean-Paul Billon-Bruyat |year=2017 |title=A new chondrichthyan fauna from the Late Jurassic of the Swiss Jura (Kimmeridgian) dominated by hybodonts, chimaeroids and guitarfishes |journal=Papers in Palaeontology |volume=3 |issue=4 |pages=471–511 |doi=10.1002/spp2.1085 |doi-access=free |bibcode=2017PPal....3..471L |hdl=11336/41081 |hdl-access=free }} The thalassochelydian turtle Thalassemys{{cite journal|last1=Anquetin|first1=J.|last2=Püntener|first2=C.|last3=Joyce|first3=W.G.|year=2017|title=A Review of the Fossil Record of Turtles of the Clade Thalassochelydia|journal=Bulletin of the Peabody Museum of Natural History|volume=58|issue=2|pages=317–369|doi=10.3374/014.058.0205|bibcode=2017BPMNH..58..317A |s2cid=31091127|url=https://doc.rero.ch/record/305668/files/joy_rfr.pdf}} and Solnhofia is known from the formation,{{Cite journal|last1=Anquetin|first1=Jérémy|last2=Püntener|first2=Christian|date=2020-11-12|title=A new species of the large-headed coastal marine turtle Solnhofia (Testudinata, Thalassochelydia) from the Late Jurassic of NW Switzerland|journal=PeerJ|language=en|volume=8|pages=e9931|pmid=33240584 |doi=10.7717/peerj.9931|pmc=7666818 |issn=2167-8359|doi-access=free}} as is the platychelyid turtles Platychelys,{{Cite journal|last1=Sullivan|first1=Patrick M.|last2=Joyce|first2=Walter G.|date=August 2017|title=The shell and pelvic anatomy of the Late Jurassic turtle Platychelys oberndorferi based on material from Solothurn, Switzerland|url=https://sjpp.springeropen.com/articles/10.1007/s13358-017-0136-7|journal=Swiss Journal of Palaeontology|language=en|volume=136|issue=2|pages=323–343|doi=10.1007/s13358-017-0136-7|bibcode=2017SwJP..136..323S |issn=1664-2376|url-access=subscription}} and the plesiochelyid turtle Plesiochelys.{{cite journal |author1=Christian Püntener |author2=Jérémy Anquetin |author3=Jean-Paul Billon-Bruyat |year=2017 |title=The comparative osteology of Plesiochelys bigleri n. sp., a new coastal marine turtle from the Late Jurassic of Porrentruy (Switzerland) |journal=PeerJ |volume=5 |pages=e3482 |doi=10.7717/peerj.3482 |pmid=28674653 |pmc=5493033 |doi-access=free }}

Vertebrate fauna

{{paleobiota-key-compact}}

= Ray-finned fish =

class="wikitable"

|+

!Genus

!Species

!Material

!Notes

!Images

rowspan="2" |"Lepidotes"

|"L". laevis

|Jaw Fragment

|Ginglymodi

|

L. sp.

|Four enameloid caps of the grinding tooth

|Ginglymodia

|

rowspan="2" |Gyrodus

|G. "jurassicus"

|Lower jaw

|Pycnodontidae

| rowspan="2" |frameless

G. sp.

|Two incisors

|Pycnodontidae

rowspan="2" |Proscinetes

|P. sp. 1

|Enameloid cap of grinding tooth, six vomers and four prearticulars

|Pycnodontidae

| rowspan="2" |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 =

class="wikitable"

|+

!Genus

!Species

!Material

!Notes

!Images

Asteracanthus{{Cite journal |last1=Leuzinger |first1=Léa |last2=Cuny |first2=Gilles |last3=Popov |first3=Evgeny |last4=Billon-Bruyat |first4=Jean-Paul |date=2017 |title=A new chondrichthyan fauna from the Late Jurassic of the Swiss Jura (Kimmeridgian) dominated by hybodonts, chimaeroids and guitarfishes |url=https://onlinelibrary.wiley.com/doi/full/10.1002/spp2.1085 |journal=Papers in Palaeontology |language=en |volume=3 |issue=4 |pages=471–511 |doi=10.1002/spp2.1085 |bibcode=2017PPal....3..471L |issn=2056-2802|doi-access=free |hdl=11336/41081 |hdl-access=free }}

|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

|

rowspan="2" |"Hybodus"

|"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

|P. sp.

|22 teeth

|Hybodontiforme that may represent a new species

|File:Planohybodus.jpg

cf. Meristodonoides

|cf. M. sp.

|22 teeth

|Hybodontiforme very similar to Meristodonoides, the teeth are too poorly preserved to properly confirm the inclusion in the genus

|

rowspan="3" |Pseudorhina

|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

|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

|Indeterminate

|One fragment of a fin spine and 5 teeth

|Indeterminate bullhead shark

|

Heterodontus

|H. semirugosus

|Six anterior teeth

|Bullhead shark

|

?Paracestracion

|?P. sp.

|One fin spine

|Heterodontiforme tentatively referred to Paracestracion

|

Palaeoscyllium

|P. cf. formosum

|15 teeth from different parts of the jaw

|Catshark most similar to P. formosum

|

Corysodon

|C. cirinensis

|Four teeth

|The systematic position of this genus is disputed, its also known from Cerin and Solnhofen

|

Rhinobatoidea

|Indeterminate

|25 teeth

|Teeth that could either belong to Belemnobatis or Spathobathis

|

rowspan="2" |Belemnobatis

|B. sismondae

|339 teeth from different parts of the jaw

|Spathobathid known by more complete specimens from Cerin

|File:Belemnobatis specimens.jpg

B. morinicus

|55 teeth

|Spathobathid known by more complete specimens from Cerin

|

Spathobathis

|S. bugesiacus

|157 teeth from different parts of the jaw

|Spathobathid known by more complete specimens from Cerin

|File:Spathobatis specimens.jpg

Ischyodus

|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

style="background:#E3F5FF;" |Laffonia{{Cite journal |last1=Zhao |first1=Yang |last2=Bestwick |first2=Jordan |last3=Fischer |first3=Jan |last4=Bastiaans |first4=Dylan |last5=Greif |first5=Merle |last6=Klug |first6=Christian |date=2025-02-16 |title=The first record of a shortnose chimaera-like egg capsule from the Mesozoic (Late Jurassic, Switzerland) |journal=Swiss Journal of Palaeontology |volume=144 |issue=1 |pages=8 |doi=10.1186/s13358-025-00352-x |doi-access=free |pmid=39967761 |issn=1664-2384|pmc=11830639 }}

|style="background:#E3F5FF;" |L. helvetica

|style="background:#E3F5FF;" |1 egg capsule

|style="background:#E3F5FF;" |Egg capsule similar to those of the modern short-nose chimaera

|style="background:#E3F5FF;" |

= Reptiles =

== Testudinata ==

class="wikitable"

|+

!Genus

!Species

!Material

!Notes

!Images

rowspan="2" |Craspedochelys

|C. picteti

|

|

|

C. jaccardi

|

|

|

Plesiochelys

|P. bigleri

|

|

|File:Plesiochelys holotype.png

Platychelys

|P. oberndorferi

|

|

|

Portlandemys

|P. gracilis

|

|

|

Solnhofia

|S. brachyrhyncha

|

|

|

Tropidemys

|T. langii

|

|

|

rowspan="3" |Thalassemys

|T. bruntrutana

|

|

|

T. hugii

|

|

|

"T." moseri

|

|

|

== Crocodylomorpha ==

class="wikitable"

|+

!Genus

!Species

!Material

!Notes

!Images

Dakosaurus

|D. maximus

|

|

|

Machimosaurus

|H. hugii

|

|

|

Proexochokefalos

|P. cf. bouchardi

|

|

|

Sericodon

|S. jugleri

|

|

|

Torvoneustes

|T. jurensis

|

|

|File:Torvoneustes-jurensis-holotype.jpg

== Dinosauria ==

class="wikitable"

|+

!Genus

!Species

!Material

!Notes

!Images

Amanzia

|A. greppini

|

|

|File:Amanzia Scale.svg

Ceratosauria

|Indeterminate

|

|

|

== Pterosauria ==

class="wikitable"

|+

!Genus

!Species

!Material

!Notes

!Images

Pterodactyloidea

|Indeterminate

|Second wing phalanx (NMS 20’870)

|

|

Invertebrate Fauna

= Cephalopoda =

class="wikitable"

|+

!Genus

!Species

!Material

!Notes

!Images

See also

References

{{Reflist}}

  • Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp. {{ISBN|0-520-24209-2}}.

Category:Kimmeridgian Stage

Category:Jurassic System of Europe

Category:Geologic formations of Switzerland

Category:Long stubs with short prose

{{Europe-geologic-formation-stub}}