Genus: Peloneustus LYDEKKER, 1889
Etymology: Greek, pelos, “mud, clay” and Greek, neustes, “swimmer”: Oxford clay swimmer.

Species: philarchus (SEELEY, 1869) LYDEKKER, 1889
Etymology:
= Plesiosaurus philarchus SEELEY, 1869
= Thaumatosaurus philarchus (SEELEY, 1869) LYDEKKER, 1888

Holotype: CAMSM (Sedgwick Museum) J. 46913

Locality: Peterborough, Cambridgeshire County, England, Southern United Kingdom.

Horizon: Oxford Clay.

Biostratigraphy:

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

Material: Mandible, anterior portion of the rostrum plus 3 disarticulated teeth, the atlas-axis complex and 66 postaxial vertebrae lacking neural aches, rib fragmetns, partial left scapula, fragmentof right coracoid, right ilium, parital left ilium, fragments of right and left ischia, humeri, femora, epipodials of the fore- and hind limb, carpals, tarsals and numerous phalanges.

Referred material:

NHMUK (old BMNH) R3318: Skull, mandible, 21 or 22 cervical, 2 or 3 cervical, 2 or 3 pectoral, 20 dorsal, 28 caudal vertebrae, ribs, dorsal and ventral, scapulae, coracoids, humeri, ilia, pubes, right ischium, and right femur.

NHMUK (old BMNH) R2679: Skull, mandible, teeth, atlas, axis, 12 cervical vertebrae, ribs, radius, ulna, and greater part of the remaining bones of one fore paddle.

NHMUK (old BMNH) R3803: Skull and mandible.

NHMUK (old BMNH) R2440: Imperfect skull and mandible, atlas, centra of 19 cervical, 26 dorsals and 19 caudals, some cervical ribs, numerous portions of the pectoral and pelvic girdles, and fore and hind paddles.

NHMUK (old BMNH) R2439: Basioccipital, quadrate, mandible, numerous teeth, atlas, axis, 18 cervical vertebrae wanting the neural arches, and ribs, also some centra of dorsal and caudal vertebrae, a few cervical and sacral ribs, scapulae, ilia, and paddle-bones: Note: KETCUM & BENSOM, 2011 do not believe this is a specime of P. philarchus and belongs to a different genus.

NHMUK (old BMNH) R2444: Fragments of skull, nearly complete mandible, 6 centra of dorsal vertebrae, fragments of ribs, almost complete and little crushed right coracoid and scapula.

NHMUK (old BMNH) R2441: Incomplete skull, fairly complete mandible, portions of the atlas, and the centra of 19 cervical, 28 dorsal and 16 caudal centra, all wanting their arches and ribs, imperfect left scapula and coracoid, ilia, and pubes.

 

KETCHUM & BENSON, 2011

NHMUK (old BMNH) 47411: Mandible.

NHMUK (old BMNH) R4058: Skull and mandible.

UNIL 9865: Skull namdible an dpartial postcranial skeleton (JACCARD, 1908).

LEICT G418.1956.33: Well-preserved, complete mandible.

MB.R.3631: Near comlte skull and mandile.

PETMG R73: Well preserved, complete mandible.

GPIT RE/3409: Fragmentary skull.

CAMSM X.50163: Skull and mandible.

 

Locality: Marston, Bedforshire County, England.

Horizon: Oxford Clay Formation, Peterborough Member.

Biostratigraphy:

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

Material:

NHMUK (old BMNH) R8574: Skull.

 

 

 

ANDREWS, 1910

Locality: Neighborhood of Peterborough, Cambridgeshire County, England, Southern United Kingdom.

Horizon: Oxford Clay.

Biostratigraphy:

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

Material:

NHMUK (old BMNH): Nearly complete skull and skeleton.
Note: Gastroliths were found.

 

BARDET, 1993

Locality: Quarry of “La grande Bruyere”, Touffreville, Calvados, Normandy, France.

Horizon:

Biostratigraphy:

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

Material:

Collection of J. Couvelard: Incomplete pelvic girdle.

 

LINDER, 1913

Locality: Fletton, south of Peterborough, Cambridgeshire County, England, Southern United Kingdom.

Horizon:

Biostratigraphy:

Age: Oxfordian Stage, Lower Malm Epoch, Late Jurassic.

Material:

SMNS 10113: Skull and mandible (LINDER, 1913).

BPIT uncatalogued 1: Skull, mandible, nearly complete postcranial skeleton (LINDER, 1913).

 

LYDEKKER, 1869

Locality: Green-End, Kempton, England, Southern United Kingdom.

Horizon: Oxford Clay.

Biostratigraphy:

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

Material:

NHMUK (old BMNH) R1253: Anterior part of the mandible, 6 teeth, and numerous fragments, several vertebral centra from the dorsal and caudal regions, portions of ribs, portions of the pectoral and pelvic girdles, imperfect fore paddles, and nearly complete hind paddles.

 

MICHELIS, SANDER, METZDORF & BREITKREUZ, 1996

Locality: Wallucke, Wiehengebirge, northern Germany.

Horizon:

Biostratigraphy:

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

Material:

PHB W 83/2: Fragmentary humerus.

PHB W 85/2: Fragmentary radius.

PHB W 84/2: Fragmentary ulna.

PHB W 87/2: Fragmentary radius.

PHB W 88/2: Fragmentary radius and intermediu.

PHB W 90/2: Metacarpal 1.

PHB W 92/2, 93/2: Phalanges.

PHB W 97/2: Left ilium.

 

PERSSON

Locality: Hooker Island, Franz Joseph Land, Arctic.

Horizon:

Biostratigraphy:

Age: Oxfordian Stage, Lower Malm Epoch, Late Jurassic.

Material:

Number: Not given: Vertebrae.

 

RIABININ, 1909

Locality: Dorf Gradulevo, Gouv. Kostroma, European Russia.

Horizon:

Biostratigraphy:

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

Material:

Number: Not given: Fragmentary skeleton.

 

= Peloneustus philarchus var spathyrhynchus LINDER, 1913
Etymology:

Holotype: GPIT uncataloogued 2

Locality:

Horizon:

Biostratigraphy:

Age:

Material: Mandible.

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Species: kiangschenensis ZHAO, 1986
Etymology:

Holotype:

Locality:

Horizon:

Biostratigraphy:

Age:

Material: