Genus: Ophthalmosaurus SEELEY, 1874
Etymology: Greek, ophthalmos, “eye” and Greek, sauros, “lizard”: Eye lizard.
= Ancanamunia RUSCONI, 1942
Etymology: In honor of Ancan Amun, 18th century warrior cheif of the Araucanian Indians in Mendoza Province, Argentina.
= Apatodonosaurus MEHL, 1928
Etymology: Greek, apatao, “deceive”, Greek, odont- (odous), “tooth”, and Greek, sauros, “lizard”: Deceptive toothed lizard.
= Baptanodon MARSH, 1880
Etymology: Greek, bapto, “dive” and Greek, anodon, “toothless”: Toothless diver.
= Khudiakovia ARKHANGELSKY, 1999
Etymology: In honor of Saratov naturalis D. S. Khudyakov.
= Microdontosaurus GILMORE, 1902
Etymology: Greek, mikros, “small”, Greek, odont- (odon), “tooth”, and Greek, sauros, “lizard”: Small toothed lizard.
= Sauranodon MARSH, 1879 non MEHL, 1879
Etymology: Greek, sauros, “lizard”, Greek, an “no, without” and Greek, odon, “tooth”: Toothless lizard.

Species: icenicus SEELEY, 1874
Etymology:

Holotype: BMNH R 2133

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

Horizon: Oxford Clay.

Biostratigraphy:

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

Material: Basioccipital, both quadrates with portion of the squamosal attached, right and left stapes, left opisthotic, left parietal, several other fragments of the skull, some sclerotic plates, posterior portion of the left ramus of the mandible, atlas, axis, 35 precaudal vertebrae, 21 caudals, imperfect neural arches, fragments of ribs, the shoulder girdle, 14 carpals and phalanges.

Note: A severely deformed and fused left clavicle/scapula (ANDREWS, 1910, APPLEBY, 1956, PARDO-PEREZ, KEAR, GOMEZ, MORONI & MAXWELL, 2018).

11) Left quadrate; 12) left stapes; 13) basioccipital from front; 14) basioccipital from behind; 15) left opisthotic from above (After ANDREWS, 1913).

Referred material:

ANDREWS, 1913

BMNH R 2188: Basioccipital, exoccipitals, basisphenoid, with parasphenoid attached, opisthotics, stapes, quadrates, quadrate-jugals, jugals, maxillae, premaxillae, nasals, lachrymal, postorbitals, part of prefrontal, postfrontals, with fragments of squamosals, and parietal, and other roofing-bones, the pterygoids, 1 palatine, and perhaps the vomers are preserved, mandible, right ramus, a number of sclerotic plates, atlas, axis, 32 precaudal vertebrae, 24 caudals, neural arches, ribs, the shoulder-girdle, both humeri, radius, ulna, pisiform, radiale, intermedius, ulnare and about 30 paddle bones.

BMNH R 2181: Basiocciptial, stapes, opisthotics, squamosal, jugals, lachrymal, nasals, quadrates, pteryogoid, mandible, both articular bones and about 40 teeth, hyoid bones, atlas, axis, 65 vertebrae, neural arches, fragments of ribs, right clavicle, coracoids, scapulae, humeri, radius, ulna, ilia, parts of the ischio-pubes and femora.

2133

BMNH 2740: Basioccipital with exoccipitals and supraoociptial attached, basishenoid with parasphenoid, posteror-superior portion of orbit showing the relations of the postorbital, supratemporal, the anterior wing of the squamosal, and the postfrontal, the facial region with the nasals, lachrymal, maxillae, and premaxillae, mandible, postsymphysial region of both rami.

BMNH R 2160: Basioccipital, exoccipitals, supra-occipitial, stapes, opisthotics, 1 por-otic, quadrates, basisphenod, portions of the roof and snout, articulars and other portions of the mandible, some sclerotic plates, atlas, axis, 24 precaudal, and 60 caudal vertebrae, 3 neural arches of posterior caudal vertebrae, scapulae, coracoids, humeri, radii, ulnae, pisiformes, carpals, and about 60 other bones of the front paddle, imperfect ischio-pubis, femora, tibiae, fibulae and 7 other bones of the hind paddles.

BMNH R 2853: Pterygoids, sclerotic plates, 6 centra, both scapulae, fragment of coracoid and clavicles, interclavicle, both fore paddle complete.

BMNH R 4149: Basisphenoid, stapes, opisthotics, 1 pro-otic, squamosal parietal, both articulars, 1 surangular, and other fragments, atlas, axis, 30 precaudal and 25 caudal vertebrae, the clavicles, scapulae, coracoids, left humerus, 23 paddle-bones, 1 ilium and both imperfect ischio-pubic bones.

BMNH R 2138: Basiocciptial, basisphenoid, and part of a quadrate, articular bones, atlas, axis, 37 precaudal and 48 caudal vertebrae, 3 caudal ribs, 2 neural arches, imperfect scapulae, coracoids, both humeri, with radii, ulnae, and pisiformes, 42 other paddle-bones, 1 ischo-pubic bone and 1 femur.

BMNH R 2162: Basioccipital, basisphenoid, supraoccipital, right exoccipital, right and left stapes, right and left opisthotic, 1 pro-otic, left quadrate, and right parietal.

BMNH R 2161: Basioccipital, exoccipital, supraoccipital, stapes, imperfect opisthotics, 1 pro-otic, and basispheonid.

BMNH R 3013: Occipital region and palate are concealed or displaced, a few small teeth and portions of the sclerotic plates, 7 caudal vertebrae and a neural arch, numerous fragments of ribs, the right coracoid and scapula.

BMNH R 2185: Quadrates with the adherent portions of the pterygoid and on one side, to the stapes, the left opisthotic, 1 pro-otic, portions of the squamosal, and the parietals, parts of the mandible, the centra of 3 precaudal and 3 caudal vertebrae, fragments of the coracoids, the right humerus, both radii, 1 ulna and 36 paddle bones, and a femur.

BMNH R 2191: Nasals, 1 maxilla, 1 lachrymal, mandible 1 articulars, the splinials, and some other parts are present.

BMNH R 2155: Basioccipital, basisphenoid, both stapes, opoisthotic, both articulars, and fragments, atlas, axis, 20 precaudal centra and right humerus.

BMNH R 2132: Quadrates, fragments of skull-bones and sclerotic plates, 26 precaudal and 31 caudal vertebral centra, coracoids, imperfect scapulae, humeri, radius, intermedium, pisiform and 23 other paddle-bones, femur, and numerous fragments of ribs.

BMNH R 2150: Basioccipital and imperfect quadrates, numerous loose teeth, 75 greatly-crushed vertebrae, 3 caudal neural arches, imperfect coracoid, scapulae, humerus, and 29 paddle bones.

BMNH R 2153: Atlas, axis, 12 precaudal and 3 caudal vertebrae, and 8 odd paddle-bones.

BMNH R 2150 1: Atlas, and axis.

BMNH R 2152: Basioccipital, atlas, axis, 21 precaudal and 15 caudal vertebrae, coracoids, left scapula, part of left humerus and 6 paddle bones.

BMNH R 2143: Left quadrate, right scapula, 3 posterior precaudal centra and 22 anterior caudal vertebrae, scapula.

BMNH R 2173:: A caudal vertebra, a left humerus with radius, ulna, and 17 other paddle-bones.

BMNH R 2174: Atlas, axis, 27 precaudal vertebrae, a femur of a juvenile.

BMNH R 2163: Basioccipital, basisphenoid, stapes, 1 opisthotic and quadrates.

BMNH R 2135: Atlas, axis, 30 precaudal centra, 24 caudals, coracoids, right humerus, both radii, intermedius, a pisisform and 15 paddle bones.

BMNH R 2188: 86 vertebral centra, a femur and 16 paddle bones.

BMNH R 2148: Fragments of mandible, 3 anterior cervical centra, 15 caudal centra, coracoids, and a femur of a juvenile.

BMNH R 2137: 11 posterior precaudal vertebral centra, 3 neural arches, many ribs, the complete shoulder girdle, 1 complete ischio-pubic bone and the proximal end of the other.

BMNH R 2147: 15 precaudal centra, 9 neural arches, parts of the clavicular arch including the median portions of both clavicles, the right one closely united with the corresponding portion of the interclavicle.

BMNH R 2141: 22 precaudal, 29 anterior caudal and 8 posterior caudal centra of a juvenile.

BMNH R 2157: 12 precaudal and 19 caudal centra.

BMNH R 2139: 11 centra, 6 neural arches, 1 scapula and coracoid.

BMNH R 2164: Basioccipital, basispheonoid.

BMNH R 2134: Right fore paddle.

BMNH R 2175: Atlas, axis, 29 precaudal, and 28 caudal vertebrae, and coracoid of a juvenile.

BMNH R 2169: 24 caudal centra.

BMNH R 3533: Basioccipital, exoccipital, supraoccipital, stapes, opisthotics, quadrates, pterygoids, squamosals, maxillae, nasals, vomers, and other bones of the skull and mandible, 60 vertebral centra, some neural arches and ribs of a juvenile.

BMNH R 3535: Parietals, frontals, squamosals, basisphenoid with parasphenoid, quadrates, stapes, opisthotic, portions of pterygoid, 2 vertebral centra, clavicular arch and numerous sclerotic plates.

BMNH R 3534: 18 caudal centra, with neural arches and ribs, imperfect shoulder-girdle, fore paddles, imperfect pelvis and hind paddles.

BMNH R 3702: Skull, and fore paddle.

Leeds Collection: Left prefrontal and postorbital.

 

APPLEBY

Locality: England, Southern United Kingdom.

Horizon:

Biostratigraphy:

Age: Late Jurassic.

Material:

Peterbourgh P.5: Fragmentary skull.

Leicester specimens 100'1949/64, 100'1949/39, 100'1949/50 and 100'1949/198: Fragmentary skulls.

 

LYDEKKER 1890

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

Horizon: Oxford Clay.

Biostratigraphy:

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

Material:

BMNH R1667: Left scapula.

BMNH R1668: Proximal portion of the right pectoral limb.

 

STORRS, ARKHANGEL’SKII & EFIMOV, 2000 (BOGOLYUBOV, 1910)

Locality: Volga River between Ul’yanovks and Gorodische, European Russia.

Horizon:

Biostratigraphy:

Age: Late Jurassic.

Material:

Number: Not given: A partial skeleton.

 

= Ophthalmosaurus pleydelli MANSELL-PLEYDELL, 1890
Etymology:

Holotype: DCM G.82 (BMNH R1712?)

Locality: Gillingham, Dorset County, England, Southern United Kingdom.

Horizon: Kimmeridge Clay.

Biostratigraphy:

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

Material: Left humerus.

Referred material:

BMNH R1712a: Centrum.

 

 

= Ichthyosaurus megalodirus SEELEY, 1869 (nomen nudum)
Etymology:

Holotype: CAMSM J65710-J65765

Locality: Woodstone Lodge, Peterborough, Cambridge, Cambridgeshire County, England, Southern United Kingdom.

Horizon: Oxford Clay Formation.

Biostratigraphy:

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

Material: Skull elements, 95 vertebrae (including the atlas-axis complex), and various girdle elements.

 

= Ophthalmosaurus monocharactus APPLEBY, 1956
Etymology:

Holotype: PETMG R220 (formerly part of Peterborough, P.8)

Locality: England, Southern United Kingdom.

Horizon:

Biostratigraphy:

Age: Late Jurassic.

Material: Fragmentary skull and fragmentary skeleton.

Referred material:

GASPARINI, 1988

Locality: Los Catutos area, 38'49" Lat. Sur, 70'12" Long. east, 17 km northeast Zapala, Neuquen Province, Patagonia, Argentina.

Horizon: Picun Leufu Formation.

Biostratigraphy:

Age: Late Jurassic.

Material:

P 1854 MOZ: Fragmentary skull and fragmentary skeleton.

 

= Ophthalmosaurus undorensis EFIMOV, 1991
Etymology:

Holotype: "Simbirtsit" Industrial Works of the Ul'yanovsk section of the All-Russian Cultural Fund. spec. No. 140.

Locality: Right bank of Volga River near village of Undory, Ul'yanovsk region of the Ul'yanovsk Oblast, European Russia.

Horizon:

Biostratigraphy: Aulacostephanus mutabilis zone.

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

Material: Tooth, 3 cervical vertebrae, thoracic vertebrae 4-18, left shoulder blade,

 

= Khudiakovia calloviensis ARKHANGELSKY, 1999
Etymology: In reference to the Callovian Substage.

Holotype: Saratov State University, SSU, no. 104a/27

Locality: Village of Dubki, Saratov District, Saratov Region, European Russia.

Horizon:

Biostratigraphy:

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

Material: An incomplete fore limb.

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Species: natans (MARSH, 1879) HUENE, 1922
= Baptanodon natans (MARSH, 1879) LYDEKKER, 1889
Etymology:
= Sauranodon natans MARSH, 1879

Holotype: No. 1952

Locality: Vicinity of Como Bluff, Albany County, Wyoming.

Horizon: Sundance Formation.

Biostratigraphy:

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

Material: Fragmentary skull and fragmentary skeleton.

Referred material:

GILMORE, 1905

Locality: Freeze Out Mountains, in Carbon County, Wyoming.

Horizon: Sundance Formation (Sauranodon beds, Baptanodon Beds.)

Biostratigraphy:

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

Material:

No. 1441: Skull and fragmentary skeleton.

Note: Has skull damage that indicates nosediving into soft sediment, WAHL, 2009

 

MASSARE, BUCHHOLTZ, KENNEY & CHOMAT, 2006

Locality: UW locality VP- 2005-007 Alcova Reservoir area, Natrona County, Wyoming.

Horizon: Sundance Formation.

Biostratigraphy:

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

Material:

UW 34786: 44 articulated vertebrae from the posterior dorsal region to just posterior to the tail bend, a few isolated fluke vertebrae were also collected.

 

MASSARE & WAHL, 2008

Locality: Natron County, Wyoming.

Horizon: Upper Redwater Shale, Sundance Formation.

Biostratigraphy:

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

Material:

UW 24216: Skull.

MASSARE, & YOUNG, 2005
= Baptanodon MASSARE & YOUNG, 2003

Locality: Redwall area, University of Wyoming location VP 2002-02, Northwestern Natrona County, Wyoming.

Horizon: Lower Redwater Shale, Sundance Formation.

Biostratigraphy: Camptonectes zone.

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

Material: A string of 10 articulated vertebrae and at least as many disarticulated ones, along with many disarticulated ribs, parts of two limbs, one partially articulated, and as yet unidentified bone.
Note: Stomach contacts with badly fragmented coleoid cephalopod hooklets.

 

WAHL, 2009

Locality: Natrona County, Wyoming.

Horizon: Sundance Formation.

Biostratigraphy: Camptonectes zone.

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

Material:

UW 24816: Skull and fragmentary skeleton.

Note: Specimen shows pathology due to sever nose dive into soft sediment. The tip of the snout is bent and has other taphonomy that shows this is what happened.

 

= Ophthalmosaurus discus (MARSH, 1880) KUHN, 1934
Etymology:
= Baptanodon discus (MARSH, 1880) MARSH, 1880
= Sauranodon discus MARSH, 1880

Holotype: No. 1955

Locality: Wyoming.

Horizon: Sundance Formation (Sauranodon beds, Baptanodon Beds.)

Biostratigraphy:

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

Material: Skull and fragmentary skeleton.

Referred material:

No. 878: Skull and fragmentary skeleton.

Note: Has skull damage that indicates nosediving into soft sediment, WAHL, 2009

No. 603: Skull.

Note: Has skull damage that indicates nosediving into soft sediment, WAHL, 2009

 

= Microdontosaurus petersonsis GILMORE, 1902
Etymology:

Holotype:

Locality:

Horizon: Sundance Formation (Sauranodon beds, Baptanodon Beds.)

Biostratigraphy:

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

Material:


= Ophthalmosaurus marshi (KNIGHT, 1903) KUHN, 1934
Etymology: In honor of O. C. Marsh.
= Baptanodon marshi KNIGHT, 1903

Holotype: "S"

Locality: Northern part of Albany County, Wyoming.

Horizon: Sundance Formation (Sauranodon beds, Baptanodon Beds.)

Biostratigraphy:

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

Material: Fragmentary skeleton.

 

= Baptanodon robustus GILMORE, 1906
Etymology: Latin, robustus, "robust, strong."
= Ophthalmosaurus robustus (GILMORE, 1906) KUHN, 1934

Holotype: No. 919

Locality: Red Fork of Powder River, Big Horn County, Wyoming.

Horizon: Sundance Formation (Sauranodon beds, Baptanodon Beds.)

Biostratigraphy:

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

Material: Well-preserved pectoral girdle, 10 cervical vertebrae.


= Baptanodon reedi GILMORE, 1907
Etymology:
= Ophthalmosaurus reedi (GILMORE, 1907) KUHN, 1934

Holotype:

Locality: Dawson Creek Basin, Fremont County, Wyoming.

Horizon: Sundance Formation (Sauranodon beds, Baptanodon Beds.)

Biostratigraphy:

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

Material: 1 half of the skull divided longitudinally, 153 vertebrae, ribs, proximal part of the left scapula, both humeri, and the proximal portion of the left pectoral extremity.

 

= Apatodonosaurus grayi MEHL, 1928
Etymology:

Holotype: University of Missouri Vertebrate Paleontology No. 503

Locality: Sundance, Fremont County, Wyoming.

Horizon: Sundance Formation.

Biostratigraphy:

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

Material: Fragmentary skull and fragmentary skeleton

_____________________________________________________________________________________

Species: mendozanus (RUSCONI, 1940) McGOWAN, 1972
Etymology: In reference to Mendoza Province, Argentina.
= Myobradypterygius mendozanus RUSCONI, 1940
= Ancanamunia mendozana (RUSCONI, 1940) RUSCONI, 1942

Holotype: PV No. 119

Locality: Mendoza Province, Argentina.

Horizon:

Biostratigraphy:

Age: Late Jurassic.

Material: Squamosals, fragmentary quadrate, teeth, and fragmentary skeleton.

Referred material:

PV No. 120: Fragmentary skull and fragmentary skeleton.

PV 135: 2 centra of a juvenile.

_____________________________________________________________________________________

Species: mollense (RUSCONI, 1938)
Etymology:
= Myobradypterygius mollensis RUSCONI, 1938
= Ancanamunia mollense (RUSCONI, 1938) RUSCONI, 1942

Holotype: Museo de Historia Natural de Mendoza, No. 106

Locality: Mendoza Province, Argentina.

Horizon:

Biostratigraphy:

Age: Tithonian Stage, Upper Malm Epoch, Late Jurassic.

Material: 46 dorsal and caudal vertebrae and rib fragments.

_____________________________________________________________________________________

Species: rjabinini EFIMOV, 1997
Etymology:

Holotype:

Locality:

Horizon:

Biostratigraphy:

Age:

Material: