Genus: Platypterygius HUENE, 1922
Etymology: Greek, platys, “broad” and Greek, pteryion, “fin” + us”: Broad fin.
= Myobradypterygius HUENE, 1927
Etymology: Greek, mys, “muscle”, Greek, bradys “slow, heavy”, Greek, pterygion, “fin” + us: Muscular heavy-fin.
= Myopterygius HUENE, 1922
Etymology: Greek, mys, “muscle”, Greek, pterygion, “fin” + us: Muscle fin.
= Plutoniosaurus EFIMOV, 1997
Etymology: From the Ulyanovsk Regional Young Paleontologists Club named “Plutonia”, and Greek, sauros, “lizard”: Plutonia lizard.
= Simbirskiasaurus OSTSCHEV & EFIMOV, 1985
Etymology: In reference to the city of Simbirsk (present day Ulanovsk) on the Volga River, Russia, Greek, sauros, “lizard”: Simbirsk lizard.

Species: steleodon (BOGOLOBOV, 1909) NESOV, IVANOV & KHOZATSKII, 1988 (nomen dubium)
Etymology:
= Ichthyosaurus stelodon BOGLOBOV, 1909
= Myopterygius stelodon (BOGLOBOV, 1909) TATARINOV, 1964

Holotype: MGRI

Locality: Ul’yyanovsk, Simbirsk, European Russia.

Horizon:

Biostratigraphy:

Age: Hauterivian or Barremian Stage, Neocomian Subepoch, Lowermost Early Cretaceous Epoch, Early Cretaceous.

Material: Fragmentary skull.
_____________________________________________________________________________________

Species: birjukovi (OSTSCHEV & EFIMOV, 1985) (nomen dubium)
Etymology:
= Simbirskiasaurus birjukovi OSTSCHEV & EFIMOV, 1985 (nomen dubium)

Holotype: SGU 104a/22

Locality: Right bank of Volga River, 25 km above the town of "Ul'yanovski, (new name for Simbirsk) European Russia.

Horizon: Simbirskites clays.

Biostratigraphy:

Age: Hauterivian Stage, Lowermost Neocomian Subepoch, Lowermost Early Cretaceous Epoch, Early Cretaceous.

Material: Fragmentary skull and part of the vertebral column.
_____________________________________________________________________________________

Species: bedengensis (EFIMOV, 1997) (nomen dubium)
Etymology: From the village of Novaya Beden’ga, olga Region, European Russia, the place of its discovery.
= Plutoniosaurus bedengensis EFIMOV, 1997 (nomen dubium)

Holotype: UPM no. 2/740

Locality: Right bank of the Volga 12 km upstream from Ulyanovsk, Volga Region, European Russia.

Horizon:

Biostratigraphy: Speetoniceras versicolor Zone.

Age: Upper Hauterivian Stage, Lowermost Neocomian Subepoch, Lowermost Early Cretaceous Epoch, Early Cretaceous.

Material: Skull, shoulder girdle, fore fins, part of the vertebral column.

_____________________________________________________________________________________

Species: sachicarum PARAMO, 1997
Etymology: In reference to Los Sachicas, Colombia, the name of the indigent inhabitants of the region where the specimen was found.

Holotype: DON-19671

Locality: Loma Pedro Luis, 1.5 km NW of Villa de Leivan, Boyaca Department, Colombia.

Horizon: Paja Formation.

Biostatigraphy:

 Age: Barremian Stage, Neocomian Subepoch, Lower Early Cretaceous Epoch, Early Cretaceous-Aptian Stage, Lower Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material: Incomplete skull.

Referred material:

MAXWELL, CORTES, PATARROYO & RUGE, 2019

Locality: El Roble Locality, Loma La Cabrera, 'Finca los Morros,' 5°39.923'N, 73°32.305'W, Villa de Leya, Boyaca Department, Columbia.

Matrial: Arcillolitas Abigarradas Member, Paja Formation.

Biostratigraphy:

 Age: Uppermost Barremian Stage, Neocomian Subepoch, Lower Early Cretaceous Epoch, Early Cretaceous.

Material:

CIP-GA-01042014: Skull and fragmentary skeleton.

_____________________________________________________________________________________

Subgenus: Platypterygius ARKHANGELSKY, 1998
Etymology:

Species: platydactylus (BROILI, 1907) ARKHANGELSKY, 1998
Etymology: Greek, platy, "broad, flat, wide" and Greek, dactylos, “finger.”
= Ichthyosaurus platydactylus BROILI, 1907
= Ichthyosaurus (Platypterygius) platydactylus (BROILI, 1907) KUHN, 1946
= Platypterygius platydactylus (BROILI, 1907) HUENE, 1922

Holotype:

Locality: Ricklinger Moor near Hannover, Saschen (Saxony) State, Germany.

Horizon:

Biostratigraphy:

Age: Aptian Stage, Lower Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material: Fragmentary skull and fragmentary skeleton.
_____________________________________________________________________________________
Species: hercynicus (KUHN, 1946) ARKHANGELSKY, 1998
Etymology:
= Ichthyosasurus (Platydactylus) hercynicus KHUN, 1946
= Platypterygius hercynicus (KUHN, 1946)

Holotype: SMSS "SGS" (Geolog.-palaontolog. Institut der Universitat Halle/S.)

Locality: Salzgitter, Tage near Bitter, north Harzvorland, Lower Saxony State, Germany.

Horizon:

Biostratigraphy:

Age: Upper Aptian Stage, Lower Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material: Partial skull, an almost complete pair of fore fins and some post-cranial elements.

Referred material:

FISCHER, 2012

Locality: Saint-Jouin-Bruneval, Saint-Maritime Department, 49°38'42.96"N, 0°09'11.21"E, Normandy, north-west France.

Horizon:

Biostratigraphy: Callihoplites auritus subzone, Mortoniceras inflatum Zone.

Age: Upper Albian Stage, Lower Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material:

MHNH 2010.4: Nearly complete skull.


_____________________________________________________________________________________
Species: kiprijanoffi (KUHN, 1946) ARKHANGELSKY, 1998
Etymology:
= Myopterygius kiprijanoffi (KUHN, 1946) ROMER, 1968
= Ichthyosaurus (Platypterygius) kiprijanoffi KUHN, 1946
= Platypterygius kiprijanoffi ((KUHN, 1946)
= Ichthyosaurus campylodon KIPRIJANOFF, 1881 non CARTER, 1846
= Ichthyosaurus campylodon LYDEKKER, 1889 (partim)
= Myopterygius campylodon HUENE, 1922 (partim)

Holotype: ZIN?

Locality: Seversk, near Kursk, European Russia.

Horizon: Severischen Sandstone.

Biostratigraphy:

Age: Albian Stage, Middle Gallic Subepoch, Uppermost Early Cretaceous Epoch,-Cenomanian Stage, Middle Gallic Subepoch, Lowermost Gulf Epoch, Early Cretaceous.

Material: Incomplete skull, vertebral centra, teeth a section of rostrum, 2 humeri, 2 femora and various phalanges.

Referred material:

BARDET, 1989

Locality: Cap Blanc-Nez, Boulonnais, France.

Horizon:

Biostratigraphy:

Age: Cenomanian Stage, Gallic Epoch, Lowermost Gulf Epoch, Middle Cretaceous.

Material:

Number: Not given: Posterior part of skull.

 

STORRS, ARKHANGEL’SKII & EFIMOV, 2000 (NESOV, 1983, NESOV et al, 1988, ROZHDESTVENSKII et al, 1987)

Locality: Lebedinsky and Stoylensky mines near Gubkin, Belgorod Region, European Russia.

Biostratigraphy:

Age: Albian Stage? Middle Gallic Subepoch, Uppermost Early Cretaceous Epoch,-Cenomanian Stage, Middle Gallic Subepoch, Lowermost Gulf Epoch, Early Cretaceous.

Material:

Number: Not given:

 

Localities: Stanislavsk and Saratov Regions, Russia.

Biostratigraphy:

Age: Albian Stage? Middle Gallic Subepoch, Uppermost Early Cretaceous Epoch,-Cenomanian Stage, Middle Gallic Subepoch, Lowermost Gulf Epoch, Early Cretaceous.

Material:

Number: Not given:

 

= Ichthyosaurus sp BROILI, 1908

Locality: Ahlem, Northern Germany.

Horizon:

Biostratigraphy:

Age: Middle Neocomian Subepoch, Lower Early Cretaceous Epoch, Early Cretaceous.

Material:

Number: Not given: Humerus and femur.

_____________________________________________________________________________________

Subgenus: Longirostria ARKHANGELSKY, 1998
Etymology: Latin, Longus, “long” and Latin, rostrum, “snout”: Long snout.

Longirostria australis (MCOY, 1869) McGOWAN, 1972 emend ARKHANGELSKY, 1998
Etymology: In reference to Australia, the country of origin.
= Platypterygius australis (MCOY, 1869) McGOWAN, 1972
= Platypterygius Longirostria longmani (WADE, 1988) ARKHANGELSKY, 1998
Etymology:
= ?Ichthyosaurus australis MCOY, 1867
= Ichthyosaurus australis MCOY, 1869
= ?Myopterygius australis (MCOY, 1869) HUENE, 1922
= Platypterygius longmanni WADE, 1988

Neotype: MVP 12989

Locality: Telmon lease, Dunluce Station, near Hughenden, central Queensland State, Australia.

Horizon: Toolebuc Formation, Rooling Downs Group.

Biostratigraphy:

Age: Mid-Upper Albian Stage, Lower Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material: Articulated skull (lacking only anterior-most snout) including dermocranium (left side obscured by overlying bones and matrix), palate, basacrainium (both largely obscured), reigh tsclerotic ring, hyoids, mandible (lacking anterior portion of dentaries) and almost complete skeleton.

Note: old Holotype: QMF 2453: Numerous centra (now lost, as per ZAMMIT, 2010)

Referred material:

QM F2451: Fragmentary skull.

ZAMMIT, NORRIS & KEAR, 2010 (published in 2011)

QM F18307: Partial scapula.

 

LONGMAN, 1922

Paratype: QMF 551

Locality: Found at Galah Creek, 12 miles from Hughenden, Central Queensland State, Australia.

Horizon: Toolebuc Formation, Rooling Downs Group [Rolling Downs Formation, (Wallumbilla Formation?)].

Biostratigraphy:

Age: Mid-Upper Albian Stage, Lower Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material: Articulated skull (lacking only anterior-most snout) including dermocranium and basicranium, palate largly obscured by overlying bones and matrix, hyoids, mandible (lacking anterior portion of dentaries).

 

FLETCHER, 1971

Plastohypotype: 1031

Locality: Base of Walker’s Table Mountain, Flinders River, Queensland State, Australia.

Horizon: Toolebuc Formation, Rooling Downs Group.

Biostratigraphy:

Age: Mid-Upper Albian Stage, Lower Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material: (portion of 9 vertebrae)

Plastohypotype: F. 4492

Locality: Marathon Station, Flinders River, North Central Queensland State, Australia.

Horizon: Toolebuc Formation, Rooling Downs Group.

Biostratigraphy:

Age: Mid-Upper Albian Stage, Lower Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material: (cast of trunk vertebra)

ZAMMIT, NORRIS & KEAR, 2010 (published in 2011)

KKM R519: 44 centra, complete (?) left hind limb, right femur, patial right hind limb.

QM F18906: Left and right hind limbs.

 

= cf. Platypterygius longmani KEAR, 2002

Locality: Casuarina Beach, north of Darwin, Northern Territory, Australia.

Horizon: Darwin Formation.

Biostratigraphy:

Age: Aptian or Albian Stage, Middle Gallic Subepoch, Upper Early Cretaceous Epoch, Late Early Cretaceous.

Material:

SAM P35039: 4 associated mid-posterior trunk centra.

SAM P35426: 2 articulated anterior trunk centa.

SAM P35427: 3 associated anterior tail stock centra.

SAM P35429: 2 associated sections of 8 and 4 articulated anterior? Tail stock centra.

SAM P35430: 9 associated anterior tail stock centra of a juvenile.


WADE, 1988

Paratypes

Locality: Flinders River, near O'Connell Creek, Australia.

Horizon: Limestone nodule in gypseous shale, Allaur Mudstone.

Biostratigraphy:

Age: Early Cretaceous.

Material:

MVP 12992, 22653-54, 22656-61: Fragmentary skulls and fragmentary skeletons.

MVP 12990: Skull fragment.

 

LEES, 1986

Locality: Western Queensland State, Australia.

Horizon: Unknown.

Biostratigraphy:

Age: Early Cretaceous.

Material:

QM F1500:

 

Locality: Big hole, Flinders Ranch, Boree Park Station, north Richmond, Queensland State, Australia.

Horizon: Toolebuc Formation.

Biostratigraphy:

Age: Albian Stage, Lower Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material:

QM F12313

QM F12317:

 

Lost

Locality: Western Queensland State, Australia.

Horizon:

Biostratigraphy:

Age: Early Cretaceous.

Material: 2 portions of the skull, teeth, some dorsal vertebrae, paddles and a humerus, radius, and ulna.

 

JACK & ETHERIDGE, 1892

Locality: Richmond Downs area of northern Queensland State, Australia.

Horizon: Tambo Formation.

Biostratigraphy:

Age: Upper Albian Stage, Lower Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material:

Snout portion of skull and vertebrae.

Portion of a skull showing the orbit with sclerotic plates, and a large number of disjointed centrums of vertebrae.

Disarticulated centrum.

 

KEAR, 2001, 2006

Locality: ‘Dunraven’ Station, near Hughenden, north-central Queensland State, Australia.

Horizon: Toolebuc Formation, Rooling Downs Group.

Biostratigraphy:

Age: Mid-Upper Albian Stage, Lower Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material:

AM F98273: A near complete juvenile skull including in excess of 100 well preserved functional and replacement teeth from both upper and lower jaws. Articulated skull including dermocranial elements from right and anterior portion of left-hand-side (premaxillae lacking distal ends), complete palate, basicranium, sclerotic rings, hyoids, complete right and partial left mandible (right dentary lacking distal end).
Note: A single anterior dentary tooth with caries (tooth decay).

AM F90847-AM F 90850: Incomplete basicranium, sapes, and posterior portions of pterygoids.

AM F 105835: Articulated anterior snout and mandible (including distal ends).

AM F116939: Articulated skull (missing section anterior to naris) including posterior dermocranium, posterior portions of pterygoids, complete basicranium, sclerotic rings, hyoids, an dposterior section of mandible.

AM F116940: Articulated skull (lacking anterior snout), including dermocranium, palate, complete basicranium, sclerotic ring.

AM F15339: Articulated skull roof (missing section anterior to naris) and quadrates.

ZMMIT, NORRIS & NEAR, 2010 (published in 2011)

AM F97620: Left humerus missing part of proximal head.

 

Locality: Hughenden, north-central Queensland State, Australia.

Horizon: Toolebuc Formation, Rooling Downs Group.

Biostratigraphy:

Age: Mid-Upper Albian Stage, Lower Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material:

AM FL13: Disarticulated partial skull including some dermocranial and palatal elements.


McGOWAN, 1972

Locality: Near Flanders River, Stewart Park, near Richmond, Queensland State, Australia.

Horizon: Toolebuc Formation.

Biostratigraphy:

Age: Early Cretaceous.

Material:

QMA F3348 also known as QMA F3388: Deformed scapula, humerus, and partial forelimb.

 

McGOWAN

Locality: Marathon, Northwestern Queensland State, Australia.

Horizon: Allaru Formation.

Biostratigraphy:

Age: Early Cretaceous.

Material:

QMF. 2297: Incomplete and somewhat weathered fore fin.

 

MURRY, 1985

Locality: Nightcliff Locality, longitude 130?51.1’E, latitude 12?22.5’S, near Darwin suburb of Nightcliff, Queensland Artesian Basin, Northern Territory, Australia.

Horizon: Mullaman Beds.

Biostratigraphy:

Age: Upper Albian Stage, Lower Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material:

Number: Not given: Fragmentary skull and fragmentary skeleton.


Locality: Casuarian Beach Locality, longitude 130?52.5’E, latitude 12?20.6’S, approximately 5.0 km NNE of the mouth of Rapid Creek, Nightcliff, Queensland Artesian Basin, Northern Territory, Australia.

Horizon: Darwin member, Bathurst Island Formation.

Biostratigraphy:

Age: Upper Albian Stage, Lower Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material:

Number: Not given: Natural casts of vertebral centar and some poorly preserved probable pectoral girdle elements, scapulae and coracoid.

 


Locality: Fannie Bay Locality, longitude 130?49.9’E, latitude 12?25.5’S, near Darwin, Queensland Artesian Basin, Northern Territory, Australia.

Horizon: Mullaman Beds.

Biostratigraphy:

Age: Upper Albian Stage, Lower Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material:

Number: Not given: Vertebrae.

 

TEICHERT & MATHESON, 1944

Locality: Dandaragan, near Perth, Western Australia State, Australia.

Horizon:

Biostratigraphy:

Age: Lower Albian Stage, Middle Gallic Subepoch, Upper Early Cretaceous Epoch or Santonian Stage, Lower Senonian Subepoch, Lower Gulf Epoch, Early Cretaceous.

Material:

Number: Not given: Centrum.

 

WADE, 1984

Locality: Kilterry station, near Julia Creek, north of Flinders River, Queensland State, Australia.

Horizon: Toolebuck Formation.

Biostratigraphy:

Age: Albian Stage, Upper Gallic Subepoch, Early Cretaceous Epoch, Early Cretaceous.

Material:

QMF 12314: Incomplete coracoid and partial scapula.

ZAMMIT, NORRIS & KEAR, 2010 (published in 2011)

QM F40822: Complete right and incomplete left coracoid.

QM F40823: Incomplete coracoid.

 

Locality: Stewart Park, near Richmond, Queensland State, Australia.

Horizon:

Biostratigraphy:

Age: Early Cretaceous.

Material:

QM F 3348: Proximal half of the right fore limb.

QMF 3389: Fin fragment.

 


Locality: Ashgrove Station, Brixton, Queensland State, Australia.

Horizon: Allaru Formation.

Biostratigraphy:

Age: Early Cretaceous.

Material:

QMF 2299: Coracoid symphysis and right humerus.

 

Locality: Lydia Downs station, near Nelia, Australia

Horizon: Toolebuc Formation (Limestone of either Formation.)

Biostratigraphy:

Age: Early Cretaceous.

Material:

QMF 2573: Left humerus with partial fin..

 

WADE, 1988, KEAR, BOLES, & SMITH, 2003

Locality: Canary, SE of Boulia, NW Queensland State, Australia.

Horizon: Toolebuck Formation.

Biostratigraphy:

Age: Albian Stage, Upper Gallic Subepoch, Early Cretaceous Epoch, Early Cretaceous.

Material:

QMF 16811: Fragmentary skeleton.
Note: A hatchling-sized protostegid turtle, an enantiornithine birds, skeletal elements from possibly a Cooyoo or Pachyrhizodus fish, and a phosphatic nodules found in the stomach region.

QMF 16812: Juvenile within QMF 16811.

QMF 13261:

 


Locality: Abranch of the Flinders Ranch and Boree Park Station, North Richmond, Queensland State, Australia.

Horizon: Toolebuck Formation.

Biostratigraphy:

Age: Albian Stage, Upper Gallic Subepoch, Early Cretaceous Epoch, Early Cretaceous.

Material:

QMF 10686: Partial skull, vertebral centra, and partial forelimbs

 


Locality: Near Flinders River, near O'Connell Creek, Australia.

Horizon: Allaru Mudstone.

Biostratigraphy:

Age: Early Cretaceous.

Material:

MVP 12991: Forefin.

 

ZAMMIT, NORRIS & KEAR, 2010 (published in 2011)

Locality: Boremba Station, Queensland State, Australia.

Horizon: Toolebuc Formation.

Biostratiraphy:

Age: Albian Stage, Upper Gallic Subepoch, Early Cretaceous Epoch, Early Cretaceous.

Material:

QM F34871: Possible clivicle element.

 

Locality: Warra Station, Boulia, Queensland State, Australia.

Horizon: Toolebuc Formation.

Biostratiraphy:

Age: Albian Stage, Upper Gallic Subepoch, Early Cretaceous Epoch, Early Cretaceous.

Material:

QM F40821: Right ischiopubis and possible clavicle element.

SAM P44323: Unprepared material, including skull, anterior vertebrae, pectoral girdle elements, and forelimb elements.

 

= ?Ichthyosaurus marathonensis ETHERIDGE, 1888
Etymology: In reference to Marathon, Western Queensland State, Australia.
= Myopterygius marathonensis (ETHERIDGE, 1888) HUENE, 1922

Holotype: QM F1448

Locality: Marathon Station, near Marathon, Western Queensland State, Australia.

Horizon: Allaru Formation.

Biostratigraphy:

Age: Early Cretaceous.

Material: Maxillary and dentary fragment.

Plastohypotype: Australian Museum, L. 549 (cast of snout and teeth).

_____________________________________________________________________________________

Species: hauthali (HUENE, 1927) ARKHANGELSKY, 1998
Etymology:
= Myobradypterygius hauthali HUENE, 1927
= Myobradypterygius HUENE 1927
= Platypterygius hauthali (HUENE, 1927) McGOWAN, 1972

Holotype: MLP 79-1-30-1

Locality: Cerro Rio Belgrano, Patagonia, Santa Cruz Province, Argentina.

Horizon: Rio Belgrano Formation.

Biostratigraphy:

Age: Barremian Stage, Neocomian Subepoch, Lower Early Cretaceous Epoch, Early Cretaceous.

Material: Humerus, and fragmentary paddle.

Referred material:

FERNANDEZ & AGUIRRE-URRETA, 2005

MLP 79-I-30-2: Slab with 2 different forefins on each side, 4 blocks with vertebral centra.

 

FERNANDEZ, 2007

Locality: Estancia La Federica, southeast of San Martin Lake, Santa Cruz Province, Argentina.

Horizon: Lago San Martin Formation.

Biostratigraphy:

Age: Barremian Stage, Neocomian Subepoch, Lower Early Cretaceous Epoch, Early Cretaceous.

Material:

MLP 85-I-18-1: Vertebral centra.

STINNESBECK, FREY, RIVAS, PEREZ, CARTES, SOTO, & LOBOS, 2014

Locality: Tyndall locality, Tyndall Glacier, Torres del Paine National Park, Southern Chile.

Horizon:

Biostratigraphy:

Age: Valanginian-Hauterivian Stage, Neocomian Subepoch- Barremian Stage, Lower Gallic Subepoch, Early Cretaceous Epoch, Early Cretaceous.

Material:

TY61: Fragmentary skull, 21 articulated and laterally exposed preflexural caudal central, distal section of 19 thoracic ribs articulated, a clavical, left and right scapula, a left coracoid, the left coracoid and scapula, left and right forefin articulated; left forefin; radius, ulna, intermedium, distal carpals, metacarpals, and distal phalanges articulated; Right forefin; distal phalanges articulated of an adult.

TY56: Premaxilla, nasal and naris in right lateal views, dentary, surangular and angular, complete articulated vertebral column in right latera view with 118 centra (46 presacrals, 39 preflexurals, 33 postflexurals) neural arches and spines articulated with their respective centra, 14 partially exposed chevrons in the postflexural vertebrae, 22 rigth articulated ribs with their proximal sections in matrix, about 37 right articulated ribs with their distal sections embedded in matrix, 30 partially embedded left gastralia, left and right clavicle, a cross-section of the interclavicle, a medial portion of a coracoid, right and left forefins articulated preserving the zeugo- and autopodial elements, a partially embedded and laterially exposed ilium, proximal section of a femur and two articulated phalanges, of a pregnant adult.
Embryo, a fragment of a very small vertebral column with 22 caudals.
Note: Intestinal content, fish remains.

TY38: Lacrimal, pterygoid, supraoccipital, both exoccipitals, basioccipital, basishpenoid, parashpenoid, ?prootic, unidentified partially embedded and disarticulated mandibular elements, atlas-axis complex, 61 articulated presacral and caudal centra, including neural arches, and spines, 42 articulated, partially embedded right thoracic ribs, 5 partially embedded and articualde gastralia, and portion of a coracoid of a juvenile.

= Platypterygius cf. hauthali TY11: Rostral elements, jugal, surangular, basioccipital and supraoccipital, 28 presacral vertebrae and 16 preflexural caudals, 2 cranial cervical centa with articulated neural arches ans spins, 65 thoracic ribs, articulated autopodial section o fthe ?left forefin with five ordinary two preaxial and two postaxial digits of an adult.

= Platypterygius cf. hauthali TY24: Right and left premaxilla, 11 disarticulated teeth, nasal, lacrimal, right pterygoid, palatine, vomer and articular, jugal, about 3 scleral plates, stapes and basisphenoid, atlax-axis, 17 articulated presacrals, 6 partically xposed neural arches and spines, 11 articulated and partially exposed left thoracic ribs, 7 right ribs, 15 partially expoed gastralia form the left side, left and right clavicle, scapula, left articulated forefin with zeugopodium and autopodiumright, disarticulated zeugo-and autopodium of a juvenile.

= Platypterygius cf. hauthali TY16: Right premaxilla, complete right and left mandibular, 28 teeth in situ, 18 central of unknown province in anterior view, autopodial portion with 27 phalanges partially embedded and partially articulated of a juvenile.

_____________________________________________________________________________________

Subgenus: Tenuirostria ARKHANGELSKY, 1998
Etymology: Latin, tenuis, “narrow”, and Latin, rostrum, “snout”; narrow snout.

Species: americanus (NACE 1939) ARKANGELSKY, 1998
Etymology: In reference to America, the country of origin.
= Myopterygius americanus NACE 1939
= Platypterygius americanus (NACE, 1939) McGOWAN, 1972

Holotype: University of Wyoming Geological Museum No. VP50

Locality: 2 feet below base of Clay Spur bentonite bed, NE 1/4, SW 1/4, Sec. 17, T49N, R 65W, Crook County, Wyoming.

Horizon: Uppermost part of the Mowry Member, Graneros Formation.

Biostratigraphy:

Age: Albian Stage, Lower Gallic Subepoch, Uppermost Early Cretaceous Epoch, Early Cretaceous.

Material: 69 vertebral centra, 17 cervical, 14 dorsal, and 38 caudal, 2 nearly complete neural arches and spines, various fragmentary arches, 1 complete posterior dorsal rib, numerous rib head and shaft fragments, various fragmentary abdominal ribs, left scapula, distal end of right scapula, both humeri, right and left ulnae and radii, right intermedium and ulnare, 17 miscellaneous phalangeal elements, possibly representing parts of all paddles, right (?) sichiopubis and lower or articular part of right (?) ilium, and both femora.

Referred material:

ROMER

Locality: Near Ostage, Wyoming.

Horizon: Mowry Shale.

Biostratigraphy:

Age: Albian Stage, Lower Gallic Subepoch, Uppermost Early Cretaceous Epoch, Early Cretaceous.

Material:

UW 2421: Skull.

 

MASSARE & DAIN, 1989, LOPUCHOWYCZ & MASSARE, 2002

Locality: Near Upton, Weston County, Wyoming.

Horizon: Mowry Shale.

Biostratigraphy:

Age: Albian Stage, Lower Gallic Subepoch, Uppermost Early Cretaceous Epoch, Early Cretaceous.

Material:

UW 32393-32395: Fragmentary specimens.

 

MAXWELL & KEAR, 2010

Locality: Wyoming.

Horizon: Belle Fourche Shale.

Biostratigraphy:

Age: Middle Cenomanian Stage, Gallic Subepoch, Lowermost Gulf Epoch, Middle Cretaceous.

Material:

UW 5545: Rostrum, opisthotic, stapes, rib fragments, vertebrae, partial scapula, right femur and assorted paddle elements.

 

Locality: Wyoming.

Horizon: Mowry Shale.

Biostratigraphy:

Age: Albian Stage, Lower Gallic Subepoch, Uppermost Early Cretaceous Epoch, Early Cretaceous.

Material:

UW 2421: Skull, atlas-axis complex vertebrae, rib fragmetns, partial right and left scapulae, partial clavicale, humeri, articulated porximal paddle elements, and disarticulated phalangeal elements.

 

Locality: Wyoming:

Horizon: Ashville Formation.

Biostratigraphy:

Age: Albian Stage, Lower Gallic Subepoch, Uppermost Early Cretaceous Epoch, Early Cretaceous-Cenomanian Stage, Gallic Subepoch, Lowermost Gulf Epoch, Middle Cretaceous.

Material:

CMN 10424: Partial rostrum.

 

= Myopterygius petersoni NACE, 1941
Etymology:

Holotype: University of Wyoming, Geological Museum, No. VP-190

Locality: SW part of Sec. 25, T48N, R 65W, Weston County, Wyoming.

Horizon: Base of the Belle Fourche shale Member, Granerous Formation.

Biostratigraphy:

Age: Albian Stage, Lower Gallic Subepoch, Uppermost Early Cretaceous Epoch, Early Cretaceous.

Material: Large fragment of an unidentified skull, stapes and paroccipital (?) bones, teeth in place in the alveolar grooves of the rostrum, 2 complete anterior dorsal centra and 1 fragment of an anterior dorsal centrum, 1 complete and 3 incomplete posterior dorsal centra, 2 anterior and 3 posterior caudal centra, 1 dorsal rib, various rib heads and fragments of rib shafts, right scapula, right femur and 26 miscellaneous phalangeal elements.

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