Species: simbirskensis BOGOLIUBOV, 1909 (nomen dubium)
Etymology:

Holotype: MGRI

Locality: Simbirsk, Ul’yanovsk Region, European Russia.

Horizon:

Biostratigraphy:

Age: Callovian Stage, Upper Dogger Epoch-Oxfordian Stage, Lower Malm Epoch, Late Jurassic.

Material: Vertebrae.

Referred material:

PERSSON

Locality: Goroditje, the oblast of Uljanovsk, European Russia.

Horizon:

Biostratigraphy:

Age: Callovian Stage, Upper Dogger Epoch, Middle Jurassic.

Material:

Number: Not given: Vertebrae and limb bones.

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Species: beaugrandi SAUVAGE, 1912 (nomen dubium)
Etymology:

Holotype:

Locality: Boulogne-sur-mer, Pas-de-Calais Department, France.

Horizon:

Biostratigraphy:

Age: Upper and Middle Kimmeridgian Stage, Middle Malm Epoch, Late Jurassic.

Material: Vertebrae.
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Species: kimmeridgensis HIRSZBERG, 1924 (nomen dubium)
Etymology:
= Cryptocleidus kimmeridgensis (sic)

Note: Originally listed as Mammalia indet.

Holotype:

Locality: Pieklo, South Poland.

Horizon:

Biostratigraphy:

Age: Kimmeridgian Stage, Middle Malm Epoch, Late Jurassic.

Material: Vertebrae.
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Species: aldingeri HUENE, 1935 (nomen dubium)
Etymology:
= Cryptocleidus (subgenus Apractocleidus) aldingeri (HUENE, 1935) (nomen dubium)

Holotype: MGUH 28378

Locality: Milne Island, Scoresby Sund, 70°40.61'N, 25°22.83'W, Greenland.

Horizon: Krebsedal Member, Kap Leslie Formation.

Biostratigraphy:

Age: Lower Kimmeridgian Stage, Middle Malm Epoch, Late Jurassic.

Material: Pectoral region and portion of the neck.