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Glyptops Temporal range: Tithonian PreꞒ Ꞓ O S D C P T J K Pg N ↓
Skull and shell of Glyptops ornatus, and shell of Adocus punctatus
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Pantestudines
Clade:	Testudinata
Clade:	†Paracryptodira
Family:	†Pleurosternidae
Genus:	†Glyptops Marsh, 1890
Species
Glyptops ornatus Marsh, 1890
Synonyms
Glyptops utahensis Gaffney 1979 Glyptops plicatulus Cope, 1877

Glyptops is an extinct genus of pleurosternid freshwater turtle known from the Late Jurassic of North America.

Taxonomy

The type species, Glyptops plicatulus, was first described as Compsemys plicatulus by Edward Drinker Cope on the basis of AMNH 6099, a partial shell from the Late Jurassic (Tithonian) aged Morrison Formation of Colorado. In 1890, a partial skull, YPM 1784 (described from Como Bluff, Wyoming), was named Glyptops ornatus by Othniel Charles Marsh. Later, Oliver Perry Hay recognized Compsemys plicatulus and Glyptops ornatus as being from the same species, hence the new combination G. plicatulus. Another Morrison species of Glyptops, G. utahensis, was described from a complete shell (CM 3412) found at Dinosaur National Monument in Utah. Glyptops later became a wastebasket taxon to refer to isolated shell fragments with a finely sculpted surface texture. The type of Glyptops plicatulus was later judged to be a nomen dubium, due to it lacking any diagnostic characters, and Glyptops ornatus was made to be the only valid species.

The species Glytops caelatus Hay, 1908 was described from the middle Cretaceous (late Aptian-early Albian) Arundel Formation of Maryland. However, it was later dismissed as a nomen dubium based on non-diagnostic remains.

Description

The skull of Glyptops ornatus exhibit adaptions likely for suction feeding.

References

1. E. D. Cope. 1877. On reptilian remains from the Dakota Beds of Colorado. Proceedings of the American Philosophical Society 17(100):193-196
2. O. C. Marsh. 1890. Notice of some extinct Testudinata. The American Journal of Science and Arts, series 3 40:177-179
3. O. P. Hay. 1908. The fossil turtles of North America. Carnegie Institution of Washington Publication 75:1-568.
4. C. W. Gilmore. 1916. Description of a new species of tortoise from the Jurassic of Utah. Annals of Carnegie Museum 10(1-2):7-12.
5. ^ Joyce, Walter G.; Anquetin, Jérémy (October 2019). "A Review of the Fossil Record of Nonbaenid Turtles of the Clade Paracryptodira". Bulletin of the Peabody Museum of Natural History. 60 (2): 129–155. doi:10.3374/014.060.0204. ISSN 0079-032X. S2CID 203780510.
6. E. S. Gaffney. 1979. The Jurassic turtles of North America. Bulletin of the American Museum of Natural History 162(3):95-135

• Glyptops at The Paleobiology Database

v t e Pantestudines
Kingdom: Animalia Phylum: Chordata Class: Sauropsida Clade: Diapsida Clade: Sauria Clade: Archelosauria Sauropsida see Sauropsida Pantestudines see below↓ Pantestudines
Pantestudines †Eorhynchochelys †Eunotosaurus? †Odontochelys †Pappochelys Testudinata †Chinlechelys †Condorchelys †Eileanchelys †Heckerochelys †Indochelys †Kallokibotion †Kayentachelys †Proganochelys †Proterochersis †Spoochelys †Australochelyidae Australochelys Palaeochersis Waluchelys †Meiolaniformes Chubutemys Otwayemys Patagoniaemys Peligrochelys Trapalcochelys Meiolaniidae Gaffneylania Meiolania Ninjemys Niolamia Warkalania †Sichuanchelyidae Laurasichersis Mongolochelys Sichuanchelys †Helochelydridae Aragochersis Helochelydra Helochelys Naomichelys Solemys †Compsemydidae Berruchelus Calissounemys Compsemys Kallokibotion? Peltochelys Riodevemys? Selenemys? Tongemys †Paracryptodira Compsemydidae? Helochelydridae? Pleurosternidae Dinochelys Dorsetochelys Glyptops Pleurosternon Riodevemys? Selenemys? Toremys Uluops Baenidae Arundelemys Arvinachelys Baena Boremys Cedrobaena Chisternon Denazinemys Edowa Eubaena Gamerabaena Gehennachelys Goleremys Hayemys Lakotemys Neurankylus Palatobaena Peckemys Plesiobaena Protobaena Saxochelys Scabremys Stygiochelys Thescelus Trinitichelys †Xinjiangchelyidae Annemys Brodiechelys Camerochelys Chengyuchelys Jastmelchyi Kalasinemys Larachelus Phunoichelys Protoxinjiangchelys Shartegemys Siamochelys Tienfuchelys Undjulemys Xinjiangchelys Yanduchelys †Sinemydidae / Macrobaenidae Anatolemys Appalachemys Asiachelys Aurorachelys Changmachelys Dracochelys Gallica Galvechelone Hongkongochelys Hoyasemys Jeholochelys Judithemys Kirgizemys Liaochelys Macrobaena Manchurochelys Ordosemys Osteopygis Oxemys Sinemys Tienfucheloides Wuguia Xiaochelys Yakemys Yumenemys †Thalassochelydia (sensu Joyce et al., 2021) Aplax Cyrtura Euryaspis Hispaniachelys Neusticemys Owadowia Pelobatochelys Thalassemys Protostegidae? "Eurysternidae" Achelonia Chelonides Eurysternum Hydropelta Idiochelys Palaeomedusa Parachelys "Plesiochelyidae" Craspedochelys Globochelus Hylaeochelys? Jurassichelon? Plesiochelys Portlandemys Tropidemys Sandownidae Angolachelys Brachyopsemys Leyvachelys Sandownia Solnhofia? Testudines see Testudines
See also: Angolachelonia Ankylopoda Mesochelydia Perichelydia Category

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• Pleurosternidae
• Prehistoric turtle genera
• Tithonian genera
• Late Jurassic turtles
• Late Jurassic reptiles of North America
• Morrison fauna
• Fossil taxa described in 1890
• Taxa named by Othniel Charles Marsh
• Prehistoric turtle stubs