Species: johnstoni GILMORE, 1933
Etymology: In reference to the "Johnson's Quarry" in the field notes to be "mostly trachdont types, also portions of a crocodilespecimen", Inner Mongolia (Nei Mongolia), China.
Holotype: AMNH 6553
Locality: Johnson's Quarry, 8 miles east of Iren Dabasu telegraph Station, Iren Dabasu, near Erenhot, Inner Mongolia (Nei Mongolia), China.
Horizon: Iren Dabasu Formation.
Biostratigraphy:
Age: Cenomanian Stage, Upper Gallic Subepoch, Lowermost Gulf Epoch, Middle Cretaceous.
Material: Dentary, maxillary, portion of skull, 10 dorsal vertebrae, 7 sacrals, 36 caudals, left scapula, left sternal, both pubes, both ischia, left femur, fibula, complete left pes and part of right.
AMNH 6553
PIN 25459/1.
Bactrosaurus johnstoni (after GODEFROIT, DONG, BULTYNCK, LI, & FENG, 1998), composite skull.
Referred material:
AMNH 6353: Right dentary.
AMNH 6365: Posterior portion of skull.
AMNH 6366: Posterior portion of skull, with braincase.
Another fragmentary posterior portion of skull.
AMNH 6370: Right exoccipital of a juvenile.
AMNH 6372: Predentary.
AMNH 6577: 3 anterior dorsals, left ilium.
AMNH 6373: Right jugal.
AMNH 6379: Right jugal.
AMNH 6380: Left dentary.
AMNH 6384: Left quadrate.
AMNH 6386: Right quadrate.
AMNH 6389: Right maxilla.
AMNH 6391: Left maxilla.
AMNH 6396: Left jugal.
AMNH 6397: Left jugal.
AMNH 6501: Right premaxilla.
AMNH 6575: Left and right premaxillae.
AMNH 6581: Right dentary.
AMNH 6584: Left prefrontal.
AMNH 6586: Right prefrontal.
AMNH 6587: Right prefrontal.
Number: Not given: Ischium, feet and limb bones of juveniles.
CURRIE & EBERTH, 1993
Locality: Site K, Iren Dabasu, near Erenhot, Inner Mongolia (Nei Mongolia), China.
Horizon: Iren Dabasu Formation.
Biostratigraphy:
Age: Cenomanian Stage, Upper Gallic Subepoch, Lowermost Gulf Epoch, Middle Cretaceous.
Material:
Number: Not given:
GODEFROIT, DONG, BULTYNCK, LI & FENG, 1998
Locality: Locality SBDE 95E5, about 16km NE of Erenhot and 7 km East of the small salt plant Iren Nor, N 43?44.442’ E 112?10.723, indicate that the locality is very close to the AMNH locality (“Quarry”) 140 and within a km distance from AMNH 141, the type locality of Bactrosaurus johnsoni, Inner Mongolia (Nei Mongolia), China.
Horizon: Iren Dabasu Formation.
Biostratigraphy:
Age: Cenomanian Stage, Upper Gallic Subepoch, Lowermost Gulf Epoch, Middle Cretaceous.
Material:
Topotypes:
SBDE 95E5/1: Basioccipital.
SBDE 95E5/2: Parietal.
SBDE 95E5/3: Left frontal.
SBDE 95E5/4-4bis: Premaxillae.
SBDE 95E5/5: Left maxilla.
SBDE 95E5/6: Left nasal.
SBDE 95E5/7: Left jugal.
SBDE 95E5/8: Right quadrate.
SBDE 95E5/9: Right squamosal.
SBDE 95E5/10: Left lachrymal.
SBDE 95E5/11: Right prefrontal.
SBDE 95E5/12: Left dentary and teeth.
SBDE 95E5/13: Right surangular.
SBDE 95E5/14: Axis.
SBDE 95E5/15-17: Cervical vertebrae.
SBDE 95E5/18-19: Dorsal vertebrae.
SBDE 95E5/20-21: Caudal vertebrae.
SBDE 95E5/22: Right coracoid.
SBDE 95E5/23: Left sternal.
SBDE 95E5/24: Right humerus.
SBDE 95E5/25: Right ilium.
SBDE 95E5/26: Right ischium.
SBDE 95E5/27: Left pubis.
SBDE 95E5/28: Distal caudal vertebra.
SBDE 95E5/29: Supraoccipital.
SBDE 95E5/30: Partial braincase.
SBDE 95E5/31: Right maxilla.
SBDE 95E5/32: Left jugal.
SBDE 95E5/33: Right nasal.
SBDE 95E5/34: Right postorbital.
SBDE 95E5/35: Left supraorbital.
SBDE 95E5/36: Predentary.
SBDE 95E5/37: Atlas.
SBDE 95E5/38: Dorsal vertebra.
SBDE 95E5/39: 2 sacaral vertebrae.
SBDE 95E5/41: Left dorsal rib.
SBDE 95E5/42: Left ulna.
SBDE 95E5/43: Left radius, right pubis.
SBDE 95E5/44: Right fibula.
SBDE 95E5/45: Proximal phalanx.
SBDE 95E5/46: Ungual phalanx.
ROZHDESTVENSKY, 1966
Locality: Iren-Nor, Inner Mongolia (Nei Mongolia), China.
Horizon:
Biostratigraphy:
Age: Early Upper Cretaceous.
Material:
PIN 25459/1: Fragmentary skull.
YOUNG, 1958Locality: Tanankou, Hsingyaokou, S of Tzoyun, North Shansi (Shanxi) Province, China.
Horizon: Tanankou Formation.
Biostratigraphy:
Age: Late Cretaceous.
Material:
IVPP V967: 25 nearly consecutive middle caudal vertebrae, a well-preserved right humerus and many other bones.
_____________________________________________________________________________________
Species: prynadai RIABININ, 1937 (nomen dubium)
Etymology:
= Tanius prynadai (RIABININ, 1937) YOUNG, 1958
(nomen
dubium)
= Bactrosaurus prinadai PRIZEMLIN, 1990, NESOV, 1995 (sic)
Holotype: PIN 32/5009, 33/5009, 31/5009
Locality: Kyrk-Kuduk in the region of the Alym-tau Range in the environs of the Sary-Agach railway-station, Kazakhstan.
Horizon: Darbazinskaya Svita.
Biostratigraphy:
Age: Cenomanian-Turonian Stage, Middle-Upper Gallic Subepoch, Lower Gulf Epoch, Middle-Early Late Cretaceous.
Material: Dentaries of the right and left sides, part of maxilla.
Referred material:
Top Left dentary; upper middle right dentary; bottom maxilla; lower middle 30/5009.
PIN 30/5009: Fragment of the anterior part of dentary.
RYAN, 1997
Locality: Republic of Tajikistan.
Horizon: Yalovach Formation.
Biostratigraphy:
Age: Late Cretaceous.
Material:
Number: Not given:
_____________________________________________________________________________________
Species: kyzylkumensis (RIABININ, 1931) NESOV, 1995
Etymology: In reference to the desert Kysyl-kum, lower Amur-Daria River, Asian Russia.
= Cionodon kysylkumensis RIABININ, 1931 (nomen dubium)
= Cionodon kyslkumense RIABININ, 1931 (nomen dubium)
= Thespesius kyslkumensis (RIABININ, 1931)
STEEL, 1969 (nomen dubium)
= Trachodon kyslkumense (RIABININ, 1931)
KUHN, 1936 (nomen dubium)
= Gilmoreosaurus kysylkumense (RIABININ,
referred material) NESOV, 1989 (nomen
dubium)
Lectotype:
Locality: Locality I, Kjira-Kuduk, about 50 km westward from Bukan-tau, central part of the desert Kysyl-kum, lower Amur-Daria River, Asian Russia.
Horizon:
Biostratigraphy:
Age: Upper Cenomanian or Lower Turonian Subepoch, Uppermiddle-Upper Gallic Subeopch, Lower Gulf Epoch, Late Cretaceous.
Material: Dorsal, caudal vertebrae (A), proximal end of right tibia (B), fragment of left dentary (C).
Referred material:
WEISHAMPEL & WEISHAMPEL, 1983/RIABININ, 1930
Locality: Heilongjiang Province, China.
Horizon: Tsagayanskiy Suite.
Biostratigraphy:
Age: ?Senonian Subepoch, Gulf Epoch, Late Cretaceous.
Material:
Number: Not given:
Lectotype: TsNIGR museum #1/3760
Locality: Dzhyrkuduk, central Kyzulkum Desert, Uzbekistan.
Horizon: Bissekt Formation, (Bissektivyskaya Svita).
Biostratigraphy:
Age: Coniacian Stage, Lower Senonian Subepoch, Gulf Epoch, Early Late Cretaceous.
Material: Dorsal vertebra.
Referred material:
Locality: Site C1 14, Dzhyrkuduk, central Kyzulkum Desert, Uzbekistan.
Horizon: Lower Part of the Bissekty Formation, (formerly Taykarshi Beds).
Biostratigraphy:
Age: Late Turonian Stage, Subepoch Gallic Subepoch, Lower Early Cretaceous Epoch, Late Cretaceous.
Material:
No. 667: Maxilla.
Locality: Site CDZH-14, Dzhyrkuduk, central Kyzulkum Desert, Uzbekistan.
Horizon: Lower Part of the Bissekty Formation, (formerly Taykarshi Beds).
Biostratigraphy:
Age: Late Turonian Stage, Subepoch Gallic Subepoch, Lower Early Cretaceous Epoch, Late Cretaceous.
Material:
No 588, 589: 2 vertebrae.
Locality: Site CDZH-17, Dzhyrkuduk, central Kyzulkum Desert, Uzbekistan.
Horizon: Lower Part of the Bissekty Formation, (formerly Taykarshi Beds).
Biostratigraphy:
Age: Late Turonian Stage, Subepoch Gallic Subepoch, Lower Early Cretaceous Epoch, Late Cretaceous.
Material:
No. 192: Tooth.
Locality: Site CDZH-17a, Dzhyrkuduk, central Kyzulkum Desert, Uzbekistan.
Horizon: Lower Part of the Bissekty Formation, (formerly Taykarshi Beds).
Biostratigraphy:
Age: Late Turonian Stage, Subepoch Gallic Subepoch, Lower Early Cretaceous Epoch, Late Cretaceous.
Material:
No. 586: Vertebra.
Number: Not given: Maxilla, vertebrae, and a tooth.
