Hutchemys is an extinctgenus of softshell turtles from the late Cretaceous (Maastrichtian stage) to the late Paleocene of New Mexico, Montana, Wyoming, Utah, and North Dakota, United States. It was first named by Walter G. Joyce, Ariel Revan, Tyler R. Lyson and Igor G. Danilov in 2009, and the type species is Hutchemys rememdium. H. rememdium is known from the holotypeYPM PU 16795, which consists of a nearly complete postcranialskeleton, and from the referred specimen YPM PU 16781, found in the Ekalaka Member of the Fort Union Formation, Montana. Another referred specimen, YPM PU 14985, was found in the Cedar Point Quarry, Wyoming. The second species, H. arctochelys, is known from the holotype YPM PU 16319, a nearly complete carapace, and from the paratypes YPM PU 16320, YPM PU 16321, YPM PU 16322, YPM PU 16238. All specimens of H. arctochelys were recovered from the same quarry of the Tongue River Member, Fort Union Formation, near Burns Mine of Montana. A possible third species is represented by the unnamed specimen UCMP 130000 from the Paleocene Tullock Formation of Montana. Aspideretes? nassau (YPM PU 11566) from the Fort Union Formation, Duffy's Ranch of Sweet Grass County, Montana was also assigned to Hutchemys sp.[1] A fourth species of Hutchemys, Hutchemys walkerorum, has been uncovered from the Hell Creek Formation of North Dakota. H. walkerorum is known from the holotype BDM 063, identified by the discovery and assembly of portions of its carapace. The fossil of H. walkerorum suggests that it was the only Hutchemys to live exclusively during the late Cretaceous era.[2]
The generic name honors John Howard Hutchison, a turtle paleontologist. Hutchison himself named later in 2009 two new genera of extinct softshell turtles from New Mexico, Montana, Wyoming and Utah: Plastomenoides (two new species: P. lamberti (type) and P. tetanetron) and Derrisemys (new species: D. sterea (type) and new combination D. acupictus [originally Plastomenus]).[3] In 2011, Joyce and Lyson noted that P. lamberti and Hutchemys rememdium are based on the same type specimen (YPM PU 16795) and therefore P. lamberti and Plastomenoides are objective junior synonyms of H. rememdium and Hutchemys. P. tetanetron Hutchison, 2009 is also cogeneric with H. rememdium. They also found that D. sterea is the closest relative of P. tetanetron and therefore both D. sterea and D. acupictus were reassigned to Hutchemys.[4]
Phylogenyedit
Cladogram after Joyce, Revan, Lyson and Danilov, 2009:[1]
^ abWalter G. Joyce; Ariel Revan; Tyler R. Lyson; Igor G. Danilov (2009). "Two New Plastomenine Softshell Turtles from the Paleocene of Montana and Wyoming" (PDF). Bulletin of the Peabody Museum of Natural History. 50 (2): 307–325. doi:10.3374/014.050.0202. S2CID 85505337.
^Jasinski, Steven E.; Heckert, Andrew B.; Sailar, Ciara; Lichtig, Asher J.; Lucas, Spencer G.; Dodson, Peter (2022-07-01). "A softshell turtle (Testudines: Trionychidae: Plastomeninae) from the uppermost Cretaceous (Maastrichtian) Hell Creek Formation, North Dakota, USA, with implications for the evolutionary relationships of plastomenines and other trionychids". Cretaceous Research. 135: 105172. doi:10.1016/j.cretres.2022.105172. ISSN 0195-6671. S2CID 246803273.
^John Howard Hutchison (2009). "New soft-shelled turtles (Plastomeninae, Trionychidae, Testudines) from the Late Cretaceous and Paleocene of North America". PaleoBios. 29 (2): 36–47.
^ abWalter G. Joyce; Tyler R. Lyson (2011). "New Material of Gilmoremys lancensis nov. comb. (Testudines: Trionychidae) from the Hell Creek Formation and the Diagnosis of Plastomenid Turtles". Journal of Paleontology. 85 (3): 442–459. doi:10.1666/10-127.1. S2CID 129918006.
January 01, 1970
hutchemys, extinct, genus, softshell, turtles, from, late, cretaceous, maastrichtian, stage, late, paleocene, mexico, montana, wyoming, utah, north, dakota, united, states, first, named, walter, joyce, ariel, revan, tyler, lyson, igor, danilov, 2009, type, spe. Hutchemys is an extinct genus of softshell turtles from the late Cretaceous Maastrichtian stage to the late Paleocene of New Mexico Montana Wyoming Utah and North Dakota United States It was first named by Walter G Joyce Ariel Revan Tyler R Lyson and Igor G Danilov in 2009 and the type species is Hutchemys rememdium H rememdium is known from the holotype YPM PU 16795 which consists of a nearly complete postcranial skeleton and from the referred specimen YPM PU 16781 found in the Ekalaka Member of the Fort Union Formation Montana Another referred specimen YPM PU 14985 was found in the Cedar Point Quarry Wyoming The second species H arctochelys is known from the holotype YPM PU 16319 a nearly complete carapace and from the paratypes YPM PU 16320 YPM PU 16321 YPM PU 16322 YPM PU 16238 All specimens of H arctochelys were recovered from the same quarry of the Tongue River Member Fort Union Formation near Burns Mine of Montana A possible third species is represented by the unnamed specimen UCMP 130000 from the Paleocene Tullock Formation of Montana Aspideretes nassau YPM PU 11566 from the Fort Union Formation Duffy s Ranch of Sweet Grass County Montana was also assigned to Hutchemys sp 1 A fourth species of Hutchemys Hutchemys walkerorum has been uncovered from the Hell Creek Formation of North Dakota H walkerorum is known from the holotype BDM 063 identified by the discovery and assembly of portions of its carapace The fossil of H walkerorum suggests that it was the only Hutchemys to live exclusively during the late Cretaceous era 2 HutchemysTemporal range Late Cretaceous to Late Paleocene 70 6 55 8 Ma PreꞒ Ꞓ O S D C P T J K Pg N Scientific classification Domain Eukaryota Kingdom Animalia Phylum Chordata Class Reptilia Order Testudines Suborder Cryptodira Family Trionychidae Subfamily Plastomeninae Genus HutchemysJoyce et al 2009 Species H arctochelys Joyce et al 2009 H rememdium Joyce et al 2009 type H tetanetron Hutchison 2009 H sterea Hutchison 2009 H acupictus Hay 1907 H walkerorum Jasinski et al 2022 Synonyms Plastomenoides Hutchison 2009 Derrisemys Hutchison 2009 Plastomenus acupictus Hay 1907 Aspideretes nassau Paleotrionyx nassau Trionyx nassau Plastomenine type A The generic name honors John Howard Hutchison a turtle paleontologist Hutchison himself named later in 2009 two new genera of extinct softshell turtles from New Mexico Montana Wyoming and Utah Plastomenoides two new species P lamberti type and P tetanetron and Derrisemys new species D sterea type and new combination D acupictus originally Plastomenus 3 In 2011 Joyce and Lyson noted that P lamberti and Hutchemys rememdium are based on the same type specimen YPM PU 16795 and therefore P lamberti and Plastomenoides are objective junior synonyms of H rememdium and Hutchemys P tetanetron Hutchison 2009 is also cogeneric with H rememdium They also found that D sterea is the closest relative of P tetanetron and therefore both D sterea and D acupictus were reassigned to Hutchemys 4 Phylogeny editCladogram after Joyce Revan Lyson and Danilov 2009 1 Trionychidae Cyclanorbinae Cyclanorbis Cycloderma Lissemys Plastomeninae Hutchemys Plastomenus Trionychinae Trionyx Chitra Pelochelys Apalone Rafetus Amyda Aspideretes Nilssonia Dogania Palea Pelodiscus Cladogram after Joyce and Lyson 2011 4 Trionychidae Trionychinae Cyclanorbinae Plastomeninae Gilmoremys Plastomenus Hutchemys H rememdium H arctochelys H tetanetron H stereaReferences edit a b Walter G Joyce Ariel Revan Tyler R Lyson Igor G Danilov 2009 Two New Plastomenine Softshell Turtles from the Paleocene of Montana and Wyoming PDF Bulletin of the Peabody Museum of Natural History 50 2 307 325 doi 10 3374 014 050 0202 S2CID 85505337 Jasinski Steven E Heckert Andrew B Sailar Ciara Lichtig Asher J Lucas Spencer G Dodson Peter 2022 07 01 A softshell turtle Testudines Trionychidae Plastomeninae from the uppermost Cretaceous Maastrichtian Hell Creek Formation North Dakota USA with implications for the evolutionary relationships of plastomenines and other trionychids Cretaceous Research 135 105172 doi 10 1016 j cretres 2022 105172 ISSN 0195 6671 S2CID 246803273 John Howard Hutchison 2009 New soft shelled turtles Plastomeninae Trionychidae Testudines from the Late Cretaceous and Paleocene of North America PaleoBios 29 2 36 47 a b Walter G Joyce Tyler R Lyson 2011 New Material of Gilmoremys lancensis nov comb Testudines Trionychidae from the Hell Creek Formation and the Diagnosis of Plastomenid Turtles Journal of Paleontology 85 3 442 459 doi 10 1666 10 127 1 S2CID 129918006 Retrieved from https en wikipedia org w index php title Hutchemys amp oldid 1221630440, wikipedia, wiki, book, books, library,
