Solemys

Solemys is an extinct genus of helyochelydrid stem-turtle known from the Late Cretaceous (late Campanian-early Maastrichtian) of southern France and eastern Spain.

Taxonomy

Two species are known, the type species Solemys gaudryi (Matheron, 1869) and S. vermiculata de Lapparent de Broin and Murelaga, 1996. The former was originally assigned to the Cenozoic turtle genus Apholidemys by Matheron (1869), but de Lapparent de Broin and Murelaga (1996) recognized it as a stem turtle distinct from Apholidemys and renamed it Solemys.

The following cladogram displays the phylogenetic relationships of Solemys according to Tong et. al. 2023:

	Mesochelydia †Kayentachelys †Condrochelys †Heckerochelys †Eilanchelys †Indochelys Perichelydia †Spoochelys †Meiolaniformes †Sichuanchelyidae †Helochelydridae †Aragochersis †Solemys †Solemys gaudryi †Solemys vermiculata †Helochelydra †Naomichelys Testudines (crown group) †Paracryptodira †Haemys †Baenidae †Neurankylus †Dinochelys †Glyptops †Arundelemys †Trinitichelys †Uluops †Lakotemys †Pechemys †Toremys †Dorsetochelys †Pleurosternon †Compsemydidae †Platychelyidae Pleurodira (side-necked turtles) †Solnhofia †Santanachelys †Thalassochelydia †Macrobaenidae †Xinjiangchelyidae crown-group Cryptodira Testudinoidea (pond turtles, tortoises, etc) Chelydroidea (snapping turtles) Panchelonioidea (sea turtles) †Siamochelys †Sinaspideretes †Basilochelys †Nanhsiungchelys †Basilemys †Adocus †Shachemys Trionychia (soft-shelled and pig-nosed turtles)
Mesochelydia	†Kayentachelys †Condrochelys †Heckerochelys †Eilanchelys †Indochelys Perichelydia †Spoochelys †Meiolaniformes †Sichuanchelyidae †Helochelydridae †Aragochersis †Solemys †Solemys gaudryi †Solemys vermiculata †Helochelydra †Naomichelys Testudines (crown group) †Paracryptodira †Haemys †Baenidae †Neurankylus †Dinochelys †Glyptops †Arundelemys †Trinitichelys †Uluops †Lakotemys †Pechemys †Toremys †Dorsetochelys †Pleurosternon †Compsemydidae †Platychelyidae Pleurodira (side-necked turtles) †Solnhofia †Santanachelys †Thalassochelydia †Macrobaenidae †Xinjiangchelyidae crown-group Cryptodira Testudinoidea (pond turtles, tortoises, etc) Chelydroidea (snapping turtles) Panchelonioidea (sea turtles) †Siamochelys †Sinaspideretes †Basilochelys †Nanhsiungchelys †Basilemys †Adocus †Shachemys Trionychia (soft-shelled and pig-nosed turtles)
	†Kayentachelys

	†Condrochelys †Heckerochelys †Eilanchelys †Indochelys Perichelydia †Spoochelys †Meiolaniformes †Sichuanchelyidae †Helochelydridae †Aragochersis †Solemys †Solemys gaudryi †Solemys vermiculata †Helochelydra †Naomichelys Testudines (crown group) †Paracryptodira †Haemys †Baenidae †Neurankylus †Dinochelys †Glyptops †Arundelemys †Trinitichelys †Uluops †Lakotemys †Pechemys †Toremys †Dorsetochelys †Pleurosternon †Compsemydidae †Platychelyidae Pleurodira (side-necked turtles) †Solnhofia †Santanachelys †Thalassochelydia †Macrobaenidae †Xinjiangchelyidae crown-group Cryptodira Testudinoidea (pond turtles, tortoises, etc) Chelydroidea (snapping turtles) Panchelonioidea (sea turtles) †Siamochelys †Sinaspideretes †Basilochelys †Nanhsiungchelys †Basilemys †Adocus †Shachemys Trionychia (soft-shelled and pig-nosed turtles)
	†Condrochelys

	†Heckerochelys †Eilanchelys †Indochelys Perichelydia †Spoochelys †Meiolaniformes †Sichuanchelyidae †Helochelydridae †Aragochersis †Solemys †Solemys gaudryi †Solemys vermiculata †Helochelydra †Naomichelys Testudines (crown group) †Paracryptodira †Haemys †Baenidae †Neurankylus †Dinochelys †Glyptops †Arundelemys †Trinitichelys †Uluops †Lakotemys †Pechemys †Toremys †Dorsetochelys †Pleurosternon †Compsemydidae †Platychelyidae Pleurodira (side-necked turtles) †Solnhofia †Santanachelys †Thalassochelydia †Macrobaenidae †Xinjiangchelyidae crown-group Cryptodira Testudinoidea (pond turtles, tortoises, etc) Chelydroidea (snapping turtles) Panchelonioidea (sea turtles) †Siamochelys †Sinaspideretes †Basilochelys †Nanhsiungchelys †Basilemys †Adocus †Shachemys Trionychia (soft-shelled and pig-nosed turtles)
	†Heckerochelys †Eilanchelys †Indochelys
	†Heckerochelys

	†Eilanchelys †Indochelys
	†Eilanchelys

	†Indochelys



Perichelydia	†Spoochelys †Meiolaniformes †Sichuanchelyidae †Helochelydridae †Aragochersis †Solemys †Solemys gaudryi †Solemys vermiculata †Helochelydra †Naomichelys Testudines (crown group) †Paracryptodira †Haemys †Baenidae †Neurankylus †Dinochelys †Glyptops †Arundelemys †Trinitichelys †Uluops †Lakotemys †Pechemys †Toremys †Dorsetochelys †Pleurosternon †Compsemydidae †Platychelyidae Pleurodira (side-necked turtles) †Solnhofia †Santanachelys †Thalassochelydia †Macrobaenidae †Xinjiangchelyidae crown-group Cryptodira Testudinoidea (pond turtles, tortoises, etc) Chelydroidea (snapping turtles) Panchelonioidea (sea turtles) †Siamochelys †Sinaspideretes †Basilochelys †Nanhsiungchelys †Basilemys †Adocus †Shachemys Trionychia (soft-shelled and pig-nosed turtles)
	†Spoochelys

	†Meiolaniformes †Sichuanchelyidae †Helochelydridae †Aragochersis †Solemys †Solemys gaudryi †Solemys vermiculata †Helochelydra †Naomichelys Testudines (crown group) †Paracryptodira †Haemys †Baenidae †Neurankylus †Dinochelys †Glyptops †Arundelemys †Trinitichelys †Uluops †Lakotemys †Pechemys †Toremys †Dorsetochelys †Pleurosternon †Compsemydidae †Platychelyidae Pleurodira (side-necked turtles) †Solnhofia †Santanachelys †Thalassochelydia †Macrobaenidae †Xinjiangchelyidae crown-group Cryptodira Testudinoidea (pond turtles, tortoises, etc) Chelydroidea (snapping turtles) Panchelonioidea (sea turtles) †Siamochelys †Sinaspideretes †Basilochelys †Nanhsiungchelys †Basilemys †Adocus †Shachemys Trionychia (soft-shelled and pig-nosed turtles)
	†Meiolaniformes

	†Sichuanchelyidae †Helochelydridae †Aragochersis †Solemys †Solemys gaudryi †Solemys vermiculata †Helochelydra †Naomichelys Testudines (crown group) †Paracryptodira †Haemys †Baenidae †Neurankylus †Dinochelys †Glyptops †Arundelemys †Trinitichelys †Uluops †Lakotemys †Pechemys †Toremys †Dorsetochelys †Pleurosternon †Compsemydidae †Platychelyidae Pleurodira (side-necked turtles) †Solnhofia †Santanachelys †Thalassochelydia †Macrobaenidae †Xinjiangchelyidae crown-group Cryptodira Testudinoidea (pond turtles, tortoises, etc) Chelydroidea (snapping turtles) Panchelonioidea (sea turtles) †Siamochelys †Sinaspideretes †Basilochelys †Nanhsiungchelys †Basilemys †Adocus †Shachemys Trionychia (soft-shelled and pig-nosed turtles)
	†Sichuanchelyidae

	†Helochelydridae †Aragochersis †Solemys †Solemys gaudryi †Solemys vermiculata †Helochelydra †Naomichelys Testudines (crown group) †Paracryptodira †Haemys †Baenidae †Neurankylus †Dinochelys †Glyptops †Arundelemys †Trinitichelys †Uluops †Lakotemys †Pechemys †Toremys †Dorsetochelys †Pleurosternon †Compsemydidae †Platychelyidae Pleurodira (side-necked turtles) †Solnhofia †Santanachelys †Thalassochelydia †Macrobaenidae †Xinjiangchelyidae crown-group Cryptodira Testudinoidea (pond turtles, tortoises, etc) Chelydroidea (snapping turtles) Panchelonioidea (sea turtles) †Siamochelys †Sinaspideretes †Basilochelys †Nanhsiungchelys †Basilemys †Adocus †Shachemys Trionychia (soft-shelled and pig-nosed turtles)
†Helochelydridae	†Aragochersis †Solemys †Solemys gaudryi †Solemys vermiculata †Helochelydra †Naomichelys
	†Aragochersis

	†Solemys †Solemys gaudryi †Solemys vermiculata †Helochelydra †Naomichelys
†Solemys	†Solemys gaudryi †Solemys vermiculata
	†Solemys gaudryi

	†Solemys vermiculata


	†Helochelydra †Naomichelys
	†Helochelydra

	†Naomichelys




Testudines (crown group)	†Paracryptodira †Haemys †Baenidae †Neurankylus †Dinochelys †Glyptops †Arundelemys †Trinitichelys †Uluops †Lakotemys †Pechemys †Toremys †Dorsetochelys †Pleurosternon †Compsemydidae †Platychelyidae Pleurodira (side-necked turtles) †Solnhofia †Santanachelys †Thalassochelydia †Macrobaenidae †Xinjiangchelyidae crown-group Cryptodira Testudinoidea (pond turtles, tortoises, etc) Chelydroidea (snapping turtles) Panchelonioidea (sea turtles) †Siamochelys †Sinaspideretes †Basilochelys †Nanhsiungchelys †Basilemys †Adocus †Shachemys Trionychia (soft-shelled and pig-nosed turtles)
	†Paracryptodira †Haemys †Baenidae †Neurankylus †Dinochelys †Glyptops †Arundelemys †Trinitichelys †Uluops †Lakotemys †Pechemys †Toremys †Dorsetochelys †Pleurosternon †Compsemydidae †Platychelyidae Pleurodira (side-necked turtles)
†Paracryptodira	†Haemys †Baenidae †Neurankylus †Dinochelys †Glyptops †Arundelemys †Trinitichelys †Uluops †Lakotemys †Pechemys †Toremys †Dorsetochelys †Pleurosternon
	†Haemys

	†Baenidae

	†Neurankylus †Dinochelys †Glyptops †Arundelemys †Trinitichelys †Uluops †Lakotemys †Pechemys †Toremys †Dorsetochelys †Pleurosternon
	†Neurankylus

	†Dinochelys †Glyptops †Arundelemys †Trinitichelys †Uluops †Lakotemys †Pechemys †Toremys †Dorsetochelys †Pleurosternon
	†Dinochelys †Glyptops
	†Dinochelys

	†Glyptops


	†Arundelemys †Trinitichelys †Uluops †Lakotemys †Pechemys †Toremys †Dorsetochelys †Pleurosternon
	†Arundelemys †Trinitichelys
	†Arundelemys

	†Trinitichelys


	†Uluops †Lakotemys †Pechemys
	†Uluops

	†Lakotemys †Pechemys
	†Lakotemys

	†Pechemys



	†Toremys †Dorsetochelys †Pleurosternon
	†Toremys

	†Dorsetochelys †Pleurosternon
	†Dorsetochelys

	†Pleurosternon







	†Compsemydidae †Platychelyidae Pleurodira (side-necked turtles)
	†Compsemydidae

	†Platychelyidae Pleurodira (side-necked turtles)
	†Platychelyidae

	Pleurodira (side-necked turtles)




	†Solnhofia †Santanachelys †Thalassochelydia †Macrobaenidae †Xinjiangchelyidae crown-group Cryptodira Testudinoidea (pond turtles, tortoises, etc) Chelydroidea (snapping turtles) Panchelonioidea (sea turtles) †Siamochelys †Sinaspideretes †Basilochelys †Nanhsiungchelys †Basilemys †Adocus †Shachemys Trionychia (soft-shelled and pig-nosed turtles)
	†Solnhofia †Santanachelys †Thalassochelydia
	†Solnhofia

	†Santanachelys †Thalassochelydia
	†Santanachelys

	†Thalassochelydia



	†Macrobaenidae †Xinjiangchelyidae crown-group Cryptodira Testudinoidea (pond turtles, tortoises, etc) Chelydroidea (snapping turtles) Panchelonioidea (sea turtles) †Siamochelys †Sinaspideretes †Basilochelys †Nanhsiungchelys †Basilemys †Adocus †Shachemys Trionychia (soft-shelled and pig-nosed turtles)
	†Macrobaenidae †Xinjiangchelyidae
	†Macrobaenidae

	†Xinjiangchelyidae


crown-group Cryptodira	Testudinoidea (pond turtles, tortoises, etc) Chelydroidea (snapping turtles) Panchelonioidea (sea turtles) †Siamochelys †Sinaspideretes †Basilochelys †Nanhsiungchelys †Basilemys †Adocus †Shachemys Trionychia (soft-shelled and pig-nosed turtles)
	Testudinoidea (pond turtles, tortoises, etc) Chelydroidea (snapping turtles) Panchelonioidea (sea turtles)
	Testudinoidea (pond turtles, tortoises, etc)

	Chelydroidea (snapping turtles) Panchelonioidea (sea turtles)
	Chelydroidea (snapping turtles)

	Panchelonioidea (sea turtles)



	†Siamochelys †Sinaspideretes †Basilochelys †Nanhsiungchelys †Basilemys †Adocus †Shachemys Trionychia (soft-shelled and pig-nosed turtles)
	†Siamochelys

	†Sinaspideretes †Basilochelys †Nanhsiungchelys †Basilemys †Adocus †Shachemys Trionychia (soft-shelled and pig-nosed turtles)
	†Sinaspideretes

	†Basilochelys †Nanhsiungchelys †Basilemys †Adocus †Shachemys Trionychia (soft-shelled and pig-nosed turtles)
	†Basilochelys

	†Nanhsiungchelys

	†Basilemys †Adocus †Shachemys Trionychia (soft-shelled and pig-nosed turtles)
	†Basilemys

	†Adocus †Shachemys Trionychia (soft-shelled and pig-nosed turtles)
	†Adocus

	†Shachemys Trionychia (soft-shelled and pig-nosed turtles)
	†Shachemys

	Trionychia (soft-shelled and pig-nosed turtles)