Genus: Proganochelys BAUR, 1887
Etymology: Greek, pro, "before", Greek, ganos, "brightness" and Greek, chelys, "turtle."
= Chinlechelys JOYCE, LUCAS, SCHEYER, HECKERT & HUNT, 2008
Etymology: 'Chinle' in reference to the Upper Triassic type horizon and Greek, chelys, "turtle."
= Psammochelys QUENSTEDT, 1889
Etymology:
= Stegochelys JAEKEL, 1918 non LYDEKKER, 1889
Etymology: Greek, stego, "covered, and Greek, chelys, "turtle."
= Triassochelys JAEKEL, 1918
Etymology:
In refernece to the Triassic, the age of the specimen, and Greek, chelys, "turtle."
Species: quenstedti BAUR, 1887
Etymology:
Holotype: Uncatalogued, Tubingen University.
Locality: Schonbuch, near Hafner-Neuhausen, Baden-Wurttemberg State, Germany.
Horizon:
Biostratigraphy:
Age: Upper Stubensandstein, Middle Keuper, Middle Norian Stage, Late Triassic Epoch, Late Triassic.
Material: Internal mold of shell.
Referred material:
Locality: Quarry in Neuhaus, near Aixheim, Baden-Wurttemberg State, Germany.
Horizon: Stubensandstein, Middle Keuper.
Biostratigraphy:
Age: Middle Norian Stage, Late Triassic Epoch, Late Triassic.
Material:
SMNS 10012: Partial carapace, with internal surface and external surface preserved in separate pieces, partial natural mold of internal surface of plasteron, separate piece with natural internal mold of the left posterior carapace section.
SMNS 15759 (= SMNS 15782 and 15783): Laterally crushed skull and lower jaws, right half of carapace, lacking lateral and posterior margins, plastron fragments, including right epiplastron, right manus with dermal armor, fragment of left forearm armor with distal end of radius, distal end of left femur, ventral plate of pelvis with paired hypoischia attached, fragment of medial section of carapace with 2 thoracic centra, 3 articulated cervicals, dermal armor with 4 articulated tubercles and various fragments.
Locality: Obere Mühle (Plateosaurus quarry), Trossingen, Baden-Wurttemberg State, West Germany.
Horizon: Upper Stubensandstein, Middle Keuper.
Biostratigraphy:
Age: Middle Norian Stage, Late Triassic Epoch, Late Triassic.
Material:
SMNS 16980: A nearly complete skeleton, with skull, jaws, carapace, plastron, cervicals lacking 6 and 7, caudals, tail club, fore and hindlimbs, lacking right tibia and fibula, both shoulder girdles, consisting of cleithra, coracoids and scapula, pelvis, hypoischia, and numerous dermal osteoderms.
SMNS 17203: Carapace and plastron, both lacking right anterior quadrate, and many peripherals, right humerus, radius and ulna, right and left femur, tibia and fibula, right tarsus, hypoischium, pelvis, left scapula, caudal vertebrae and tail club.
SMNS 17204: Carapace and plastron with nearly complete right forelimb, both hindlimbs, pelvis, cervicals 6 and 7, caudal vertebrae and tail club.
SCHEYER, KLEIN, EVERS, MAUTNER & PABST, 2022
Locality: From a hill opposite the famous Plateosaurus-bearing clay pit Gruhalde, Frickberg near the town of Frick, Canton Aargau, Switzerland.
Horizon: Klettgau Formation.
Biostratigraphy:
Age: Norian Stage, Middle Late Triassic Epoch, Late Triassic.
Material:
SMF 09-F2: Skull and skeleton.
= Psammochelys keuperina QUENSTEDT, 1889
Etymology:Holotype: University of Tubingen, uncatalogued.
Locality: Quarry in Neuhaus, near Aixheim, Baden-Wurttemberg State, Germany.
Horizon: Stubensandstein, Middle Keuper.
Biostratigraphy:
Age: Middle Norian Stage, Late Triassic Epoch, Late Triassic.
Material: Internal mold of the shell.
= Stegochelys dux JAEKEL, 1918
Etymology:
= Triassochelys dux (JAEKEL, 1918) JAEKEL, 1918Holotype: MB 1910.45.2
Locality: Barecke's (Formerly Heine's) and Limpricht Quarry, clay quarry on the east edge of Halberstadt, Sachsen-Anhalt State, northeastern Germany.Horizon: Upper Keuper Knollenmergel, km5, Middle Keuper, deepest part of the quarry.
Biostratigraphy:
Age: Upper Norian Stage, Middle Triassic Epoch, Middle Triassic.
Material: Skull, with lower jaws, carapace, plastron lacking most of anterior lobe, cervical vertebrae, both cleithra, left scapula and coracoid, and dermal ossicles, a pelvis and femur head from the same locality but not associated with the above specimen has the number MB 1910.45.3.
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Species: tenertesta (JOYCE, LUCAS, SCHEYER, HECKERT & HUNT, 2008) JOYCE, 2017
Etymology: Latin, tener, "delicate," Latin testa, "shell"; in reference
to the thin-shelled nature of this taxon.
= Nova JOYCE, LUCAS, SCHEYER, HUNT & HECKERT,
2007
= Chinlechelys tenertesta JOYCE, LUCAS, SCHEYER, HECKERT & HUNT, 2008
Holotype: NMMNH P-166897
Locality: NMMNH locality 001, Revuelto Creek, Quay County, east-central New Mexico.
Horizon: Bull Canyon Formation, Chinle Group.
Biostratigraphy:
Age: Revueltian, Early Norian Substage, Early Norian Epoch, Middle Late Triassic Epoch, Late Triassic.
Material: Partial skeleton including the central portion of the carapace, left hypoplastron, a posterior costal with ribs, portions of the bridge, a neck spine and isolated osteoderms.
Referred material:
= cf. Chinlechelys tenertesta KLIGMAN, WHATLEY, RAMEZANI, MARSH, LYSON, FITCH, PARKER & BEHRENSMEYER, 2025
Locality: PEFO 393, Petrified Forest National Park, Navajo County, Arizona.
Horizon: Lower Owl Rock Member, Chinle Formation
Biostratigraphy:
Age: Apachean teilzone, Norian Stage, Late Triassic.
Material:
PEFO 50871: Co-0ossified spike-like cervical osteoderm.
PEFO 50936: Left pelvic girdle.
PEFO 52886: Peripheral fragment.
PEFO 52888: Posterior peripheral elements.
PEFO 53191: Posterior carapace frgment including pleural and supramarginal scute.
PEFO 53214: Caudal vertebra.
PEFO 53260: Carapace fragment.
PEFO 53267: Hypo-or-hoplastron fragment.
PEFO 53286: Nuchal region of carapace.
PEFO 53300: Skull roof fragment.
PEFO 53333: Carapace fragment.
PEFO 533379: Squamosal?
PEFO 56058: Anterior left carapace fragment including two costal scutes and preserving several carapacial scale sulci.
LICHTIG & LUCAS, 2021
Locality: NMMNH locality 166, Quay County, east-central New Mexico.
Horizon: Bull Canyon Formation, Chinle Group.
Biostratigraphy:
Age: Revueltian, Early Norian Substage, Early Norian Epoch, Middle Late Triassic Epoch, Late Triassic.
Material:
NMMNH P-16621: Innominate.
Locality: NMMNH locality 53, Quay County, east-central New Mexico.
Horizon: Bull Canyon Formation, Chinle Group.
Biostratigraphy:
Age: Revueltian, Early Norian Substage, Early Norian Epoch, Middle Late Triassic Epoch, Late Triassic.
Material:
NMMNH P-4315: Proximal portion of a femur.