Genus: Trinacromerum CRAGIN, 1888
Etymology: Greek, trinakros (Trinax), “trident, three-pointed tool,” Greek, meros, “femur, limb” + um: Trident limb.
= Ceraunosaurus THURMOND 1968
Etymology: Greek, keraunos, “thunderbolt” and Greek, sauros, “lizard”: Thunderbolt lizard.
= Piratosaurus LEIDY, 1865
Etymology: Greek, peirates, “pirate, robber” and Greek, sauros, “lizard”: Pirate lizard.

Species: bentonianum CRAGIN, 1888
Etymology:

Holotype: USNM 10945

Locality: Near the fork of the Solomon River, in the vicinity of Downs, Osborne County, Kansas.

Horizon: Fairport Chalk Member, Carlile Shale.

Biostratigraphy:

Age: Middle Turonian Stage, Uppermost Gallic Subepoch, Lower Gulf Epoch, Late Cretaceous.

Material: Fragment of the snout with attached jaws, partial basicranium with attached atlas-axis, at least 27 vertebrae consisting mostly of centra, interclavicles, partial clavicles and interpectoral bar of coracoids, both ilia, two partial pubes, parts of both ischia, and proximal ends of two propodials, the distal ends of three paddles with attached metapodials, and one group of articulated phalanges.

Paratype:

USNM 10946: Skull.

Referred material:

Skull 1

Skull 2

 

= Trinacromerum ?bentonianum ALBRIGHT, GILLETTE & TITUS, 2007b

Locality: Utah Geological Survey Locality 42Ka008VI, near Muddy Creek, Orderville, Kane County, Utah.

Horizon: Tropic Shale.

Biostratigraphy: Upper part of the Sciponoceras gracile Ammonoid Biozone.

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

Material:

UMNH Accession Number 96.10: 'Partial skeleton from the tail and trunk region, consisting to two sections of vertebrae in articulation, one with approximately 18 vertebrae, the other with approximately 30 vertebrae, isolated vertebrae, 2 teeth, a paddle bone, and additional unidentified elements.

 

Locality: MNA LOC 1607, Glen Canyon National Recreation Area, Kane County, Utah.

Horizon: Tropic Shale, approximately 6 m above top of Bentonite C, approximately 2 m below top of Bentonite D.

Biostratigraphy:

Age: Early Turonian Stage, Uppermost Gallic Subepoch, Lower Gulf Epoch, Late Cretaceous.

Material:

MNA V10044: 2 cervical vertebrae.

 

Locality: MNA LOC 1610: Glen Canyon National Recreation Area, Kane County, Utah.

Horizon: Tropic Shale, approximately 18.75 m above top of Bentonite D.

Biostratigraphy: Approximately 10.0 m below LO of Mammites.

Age: Early Turonian Stage, Uppermost Gallic Subepoch, Lower Gulf Epoch, Late Cretaceous.

Material:

MNA V10045: Right femur with proximal paddle elements.

 

SCHUMACHER & EVERHART, 2005

Locality: Road-cut south of Wilson Lake Reservoir, east-central Russel County, Kansas.

Horizon: Uppermost Pfeifer Member, Greenhorn Limestone, about 2 m below the Fencepost Limestone.

Biostratigraphy:

Age: Late Early Turonian Stage, Uppermost Gallic Subepoch, Lower Gulf Epoch, Late Cretaceous.

Material:

ESU 5000: Nearly complete and articulated right front paddle.

 

Locality: In a block of building stone being used to construct the stadium on Fort Hays State University, Ellis County, Kansas.

Horizon: Most likely the block came from the Fencepost Limestone bed, Greenhorn Limestone.

Biostratigraphy:

Age: Late Early or Early Middle Turonian Stage, Uppermost Gallic Subepoch, Lower Gulf Epoch, Late Cretaceous.

Material:

FHSM VP-71: An articulated series of 5 dorsal vertebrae, a partial right scapula, and a rib portion.

 

Locality: East-central Ellis County, Kansas.

Horizon: Middle Fairport Chalk, Carlile Shale.

Biostratigraphy:

Age: Early MiddleTuronian Stage, Uppermost Gallic Subepoch, Lower Gulf Epoch, Late Cretaceous.

Material:

FHSM VP-698: Nearly complete axial skeleton minus the skull, including a series of 62 vertebrae beginining with the atas-axis and extending into the anterior caudals, also numerous cervical and trunk ribs, sacral ribs, the proximal head and distal end of a propodial (?), left ilium, girdle portions, and numerous loose podials and phalanges.
Note: Tooth marks on the ilium by Squalicorax.

 

Locality: Near the town of Pfeifer, southeastern Ellis County, Kansas.

Horizon: Uppermost Pfiefer Member, Greenhorn limestone or Lower Fairport Chalk Member Member, Carlile Shale.

Biostratigraphy:

Age: Late Early or Early Middle Turonian Stage, Uppermost Gallic Subepoch, Lower Gulf Epoch, Late Cretaceous.

Material:

FHSM VP-2936: Articulated series of dorsal vertebrae and ribs.

 

Locality: From a road-cut in west-central Russell County, Kansas.

Horizon: Lower Fairport Chalk.

Biostratigraphy:

Age: Early MiddleTuronian Stage, Uppermost Gallic Subepoch, Lower Gulf Epoch, Late Cretaceous.

Material:

FHSM VP-6618: A relatively complete axial skeleton with ribs minus the posterior caudal series.

 

Locality: Burger Farm, Northwestern Lincoln County, Kansas.

Horizon:

Biostratigraphy:

Age: Late Early or Early Middle Turonian Stage, Uppermost Gallic Subepoch, Lower Gulf Epoch, Late Cretaceous.

Material:

FHSM VP-15575:An articulated series of 4 dorsal vertebrae.

 

Locality: 4 miles north of Gorham on Salt Creek, Kansas.

Horizon: Uppermost Greenhorn Limestone or Lowermost Fairport Chalk.

Biostratigraphy:

Age: Early MiddleTuronian Stage, Uppermost Gallic Subepoch, Lower Gulf Epoch, Late Cretaceous.

Material:

KUVP 1316: Single cervical vertebra.

 

= Polcotylus sp

Locality: 9 miles northeast of Lincoln center near a big spring, Lincoln County, Kansas.

Horizon: Uppermost Greenhorn Limestone or Lowermost Fairport Chalk.

Biostratigraphy:

Age: Middle Cenomanian Stage, Upper Middle Gallic Subepoch, Lowermost Gulf Epoch, Middle Cretaceous-Middle Turonian Stage, Uppermost Gallic Subepoch, Lower Gulf Epoch, Late Cretaceous.

Material:

KUVP 1331: 2 cervical, 5 dorsal and 1 sacral vertebrae, and the proximal portion of a propodial.

 

= Dolichorhynchops sp SCHWIMMER, STEWART & WILLIAMS, 1997

Locality: Ellis County, Kansas.

Horizon: Middle Fairport Chalk Member, Carlile Shale.

Biostratigraphy:

Age: Middle Turonian Stage, Upper Gallic Subepoch, Lower Gulf Epoch, Late Cretaceous.

Material:

FHSM VP 12059: Fragmentary skeleton.
Note: Serrate bite marks on both surfaces of left coracoid, not healed from a shark.


= Trinacromerum anonymum WILLISTON, 1903
Etymology:
= Ichthyosaurus MUDGE, 1873

Holotype: KUVP 1325

Locality: Near Paradise Creek, NW 1/4, Sec. 20, T11S, R14W, Russell County, Kansas.

Horizon: Fencepost Limestone, Pfeiffer Shale Member, Greenhorn Limestone.

Biostratigraphy:

Age: Late Cretaceous.

Material: 10 associated cervical vertebrae, propodial, parts of ilium and coracoid, 15 vertebrae and 2 phalanges.
Note: Tooth marks on the ilium by Squalicorax (SCHUMACHER & EVERHART, 2005)

Referred material:

Locality: 3 miles south of the Solomon, Kansas.

Horizon: Benton Formation.

Biostratigraphy:

Age: Turonian Stage, Uppermost Gallic Subepoch, Lower Gulf Epoch, Late Cretaceous.

Material:

 

Locality: 3 miles south of a fork of the Solomon River, Osborne County, Kansas.

Horizon: Fairport Chalk (“Benton” Formation.)

Biostratigraphy:

Age: Early MiddleTuronian Stage, Uppermost Gallic Subepoch, Lower Gulf Epoch, Late Cretaceous.

Material:

YPM 1129: Fragmentary skull and fragmentary skeleton.

Number: Fragmentary skull and fragmentary skeleton.

Number: Fragmentary skull and fragmentary skeleton.

 

= Trinacromerum willistoni RIGGS, 1944
Etymology:
= Dolichorhynchops willistoni (RIGGS, 1944) WELLS, 1962

Holotype: KUVP 5070

Locality: Sec. 16, T.6S, R3W, in a cut on U.S. Highway 81 South of Concordia, Cloud County, Kansas.

Horizon: Jetmore Chalk, Hartland Shale member, Greenhorn Limestone Formation.

Biostratigraphy:

Age: Cenomanian Stage, Upper Middle Gallic Subepoch, Lowermost Gulf Epoch, Middle Cretaceous.
Note: Early Turonian according to SCHWIMMER, STEWART & WILLIAMS, 1997.

Material: Skull, mandible, 50 vertebrae, many ribs, most of the pectoral girdle, both pubes lacking some sections, and the ischia almost entire.
Note: Bite marks on left pubis from a shark.

 

= Ceraunosaurus brownorum THURMOND, 1968
Etymology:

Holotype: Baylor University, Waco, Texas, SM 3025

Locality: At the foot of the southeast end of the old Lake Waco Dam, West of Waco, McLennan County, Texas.

Horizon: Lake Waco Formation.

Biostratigraphy:

Age: Upper Cenomanian Stage or possibly Upper Turonian Stage, Upper Gallic Subepoch, Lowermost Gulf Epoch, Late Cretaceous.

Material: Skull and fragmentary skeleton.

_____________________________________________________________________________________

Species: latimanus WILLISTON, 1906
Etymology:

Holotype. FMNH UC 606

Locality: Near Hailey, Fremont County, Wyoming.

Horizon: Hailey Shales, Lower Frontier Formation.

Biostratigraphy:

Age: Turonian Stage, Upper Gallic Subepoch, Lower Gulf Epoch, Late Cretaceous.

Material: Posterior portion of skull, vertebrae, portions of the limbs.
_____________________________________________________________________________________

Species: kirki RUSSELL, 1935
Etymology:
= Dolichorhynchops kirki (RUSSELL, 1935) BARDACK, 1986

Holotype: Manitoba Museum, Winnipeg

Locality: Section 16, township 9, range 10, west of 1st meridian, Assiniboine river, northwest of Treherne, Manitoba Province, Canada.

Horizon: Assiniboine beds, Benton Formation.

Biostratigraphy:

Age: Turonian Stage, Upper Gallic Subepoch, Lower Gulf Epoch, Late Cretaceous.

Material: Incomplete skeleton.

Referred material:

BARDACK, 1968

Locality: Sec. 16, Tp. 9, Rge. 10W of Principal Meridian, Manitoba Province, Canada.

Horizon: Favel Formation.

Biostratigraphy:

Age: Late Cretaceous.

Material:

MMMN uncatalogued: Skeleton.

 


Locality: Thornhill, Manitoba Province, Canada.

Horizon: Vermilion River Formation.

Biostratigraphy:

Age: Late Cretaceous.

Material:

MMMN 318P: Vertebrae.

 


Locality: Pasquia Hills, 17 miles above mouth of Manitoba River, Canada.

Horizon: "Pierre Shale".

Biostratigraphy:

Age: Late Cretaceous.

Material:

NMC 2866: Vertebrae and phalanges.

 

cf. kirki NICHOLLS, 1988

Locality: Manitoba Province, Canada.

Horizon: Pembina Member, Pierre Shale.

Biostratigraphy:

Age: Campanian Stage, Upper Senonian Subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

RTMP P80.04.15: Partially articulated specimen.