Genus: Proganochelys BAUR, 1887
Etymology: Greek, pro, "before", Greek, ganos, "brightness" 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: GPIT-PV-30000 (old Uncatalogued, Tubingen University).

Locality: Neuenhaus (= Häfner-Neuhausen), Baden-Württemberg State, Germany.

Horizon: Middle or Upper Stubensandstein (S2-4), Löwenstein Formation, Middle Keuper Subgroup.

Biostratigraphy:

Age: Alaunian-Sevatian, Middle Norian Stage, Late Triassic Epoch, Late Triassic.

Material: Internal mold of shell.

Proganochelys quenstedti after KARL, TICHY & SAFI, 2025: schematic representation of the postion of the supramarginalia on the pleural 4.

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, 1918

Holotype: 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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