Species: sirindhornae MARTIN, BUFFETAUT & SUTEETHORN, 1994
Etymology: In honor of Son Altesse, Royal Princess of Thailand.

Holotype: Palaeontological collection of the Department of mineral Resources, Bangkok, P.W.1-1-12

Locality: Phu Wiang site 1, Pratu Teema Hill, Amphoe Phu Wiang, Khon Kaen Province, northeastern Thailand.

Horizon: Sao Khua Formation, Khorat group.

Biostratigraphy:

Age: Early Cretaceous.

Material: Cervical, dorsal vertebrae, ilia, pubes, ischia, sacrum, femora, fibula and ribs.

Break down.

P.W.1-1: Anterior cervical vertebra.

P.W.1-2: Middle cervical vertebra.

P.W.1-3: Posterior cervical vertebra.

P.W.1-4: 2 dorsal vertebra.

P.W.1-5: Dorsal vertebra.

P.W.1-6: Dorsal vertebra.

P.W.1-7: Left scapula.

P.W.1-8: Left humerus.

P.W.1-9: Left ulna.

P.W.1-10: Left ilium.

P.W.1-11: Right ilium.

P.W.1-12: Left pubis.

P.W.1-13: Distal end of right pubis.

P.W.1-14: Left ischium.

P.W.1-15: Right ischium.

P.W.1-16: Left femur.

P.W.1-17: Right femur.

P.W.1-18: Left fibula.

P.W.1-19: Fragmentary coracoid.

P.W.1-20: Chevron.

P.W.1-21: Proximal end of right rib.

P.W.1-22: Distal end of right scapula.

P.W.1-: 2 ribs.

Topotypes: SUTEETHORN, LE LOEUFF, BUFFETAUT & SUTEETHORN, 2010

SM PW 1-23: Dorsal vertebra.

SM PW 1-23: Anterior caudal vertebra.

Referred material:

MARTIN, SUTEETHORN & BUFFETAUT, 1999

Locality: Phu Wiang site 2, Tham Ghia, Amphoe Phu Wiang, Khon Kaen Province, northeastern Thailand.

Horizon: Sao Khua Formation, Khorat group.

Biostratigraphy:

Age: Early Cretaceous.

Material:

P.W.2A-1: Phalanx.

P.W.2A-: Femur (in D.M. R. in Khon Kaen).

P.W.2A-: Incomplete femur.

 

Locality: Phu Wiang site 3, Huai Pratu Teema, Amphoe Phu Wiang, Khon Kaen Province, northeastern Thailand.

Horizon: Sao Khua Formation, Khorat group.

Biostratigraphy:

Age: Early Cretaceous.

Material:

P.W.3-1: Anterior dorsal vertebra.

P.W.3-2: Left sternal plate.

P.W.3-3: Right sternal plate.

P.W.3-4: Distal end of a femur.

P.W.3-5: Dorsal vertebra.

Unnumbered: Bone fragments.

 

Locality: Phu Wiang site 4, Noen Sao Eh, Amphoe Phu Wiang, Khon Kaen Province, northeastern Thailand.

Horizon: Sao Khua Formation, Khorat group.

Biostratigraphy:

Age: Early Cretaceous.

Material:

P.W.4-1: Proximal end of tibia.

P.W.4-2, -3: Dorsal vertebrae.

P.W.4-4, -5: Anterior caudal vertebrae.

P.W.4-6: Proximal end of a right femur of a juvenile.

P.W.4-7, -8: Distal end of right femora of juveniles.

P.W.4-9: Proximal end of a left femur of a juvenile.

P.W.4-10, -11: Proximal end of right femora of juveniles.

P.W.4-12: 2 parts of a right tibia.

P.W.4-13-18: Posterior caudal centra of juveniles.

P.W.4-19: Distal end of a scapula in 2 parts.

P.W.4-20: Proximal end of a femur of a juvenile.

P.W.4-21-24: Anterior caudal centra of juveniles.

P.W.4-25: Posterior caudal centra.

P.W.4-: Distal end of a pubis.

P.W.4-: Fragmentary proximal end of a pubis.

 

Locality: Phu Wiang site 5, Sum Ya Ka, Amphoe Phu Wiang, Khon Kaen Province, northeastern Thailand.

Horizon: Sao Khua Formation, Khorat group.

Biostratigraphy:

Age: Early Cretaceous.

Material:

P.W.5-1: Dorsal centrum of a juvenile.

P.W.5-2: Anterior caudal centrum.

P.W.5-3-6: Caudal centra.

P.W.5-7: Anterior caudal vertebra with neural arch.

P.W.5-8: Water worn caudal vertebra.

P.W.5-9, -10: Sacral vertebrae.

P.W.5-11: Caudal vertebra with neural arch.

P.W.5-12: Femur of a juvenile.

P.W.5-13, 14: Caudal vertebrae with co-ossified chevron.

P.W.5-15, -16: Ungual phalanges.

P.W.5-17, -18: Phalanges.

P.W.5-19: Fragment indet.

P.W.5-20: Left femur of a juvenile.

P.W.5-21: Left fibula of a juvenile.

P.W.5-22: Right radius.

P.W.5-23: Left tibia (very small).

P.W.5-24: Radius (very small).

P.W.5-25: Hyoid bone.

P.W.5-26: Caudal vertebra.

P.W.5-27: Neural arch of vertebra P.W.5-26.

P.W.5-28: Caudal vertebra with co-ossified chevron.

P.W.5-29: Ischium (very small).

P.W.5-30: Cervical vertebra in plaster jacket.

P.W.5-31, -34, -56: Chevron bones.

P.W.5-32, -33: Caudal vertebrae with neural arches.

P.W.5-35: Cervical centrum of a juvenile.

P.W.5-36: 2 cervical vertebrae in connection in a plaster jacket.

P.W.5-37, -38: Cervical vertebrae in plaster jackets.

P.W.5-39: Scapula and fused coracoid.

P.W.5-48: Sacral rib of a juvenile.

P.W.5-49: Left femur.

P.W.5-50: Dorsal vertebra with neural arch.

P.W.5-51: Centrum.

P.W.5-52: Cervical rib.

P.W.5-53, 54, -65: Ribs.

P.W.5-55: Ulna.

P.W.5-57: Dorsal vertebra with neural arch.

P.W.5-58, -66: Phalanx.

P.W.5-59: Posterior caudal centra.

P.W.5-60, -62: Caudal vertebrae.

P.W.5-61: Anterior caudal centrum of a juvenile.

P.W.5-63: Incomplete sacral rib of a juvenile.

P.W.5-64: Chevron proximal end.

P.W.5-67: Sacral rib of a juvenile.

P.W.5-68: Right ilium of a juvenile.

P.W.5-69: Left sternal plate in a plaster jacket.

P.W.5-70: Right sternal plate in a plaster jacket.

 

Locality: Phu Wiang site 5A, Amphoe Phu Wiang, Khon Kaen Province, northeastern Thailand.

Horizon: Sao Khua Formation, Khorat group.

Biostratigraphy:

Age: Early Cretaceous.

Material:

P.W.5A-1: Left femur.

P.W.5A-2: Right femur.

P.W.5A-3: Ilium in plaster jacket.

P.W.5A-4: Fragment of a neural arch of a juvenile.

P.W.5A-6: Proximal end of a juvenile tibia.

P.W.5A-7: Middle caudal centrum of a juvenile.

P.W.5A-8: Proximal end of a pubis of a juvenile.

P.W.5A-9: Dorsal centrum of a juvenile.

P.W.5A-10: Unfused sacral vertebra of a juvenile.

P.W.5A-11: Anterior dorsal rib of a juvenile.

P.W.5A-12: Proximal end of a chevron.

P.W.5A-13: Sacral rib of a juvenile.

P.W.5A-14: Right humerus of a juvenile.

P.W.5A-15: Caudal centrum.

P.W.5A-16: Ungual.

P.W.5A-17: Metapodal.

P.W.5A-18: Phalanx.

P.W.5A-19: Sacral centrum of a juvenile.

P.W.5A-20-22: Cervical centra of a juvenile.

P.W.5A-23, -24: Phalanges.

P.W.5A-25: Dorsal vertebrae of a juvenile (very small).

P.W.5A-26: Posterior caudal vertebra.

P.W.5A-27: Dorsal vertebra of a juvenile.

P.W.5A-28: Dorsal vertebra.

P.W.5A-29, -33, -41: Ribs.

P.W.5A-30: Coracoid of a juvenile.

P.W.5A-31: Proximal end of a ischium of a juvenile.

P.W.5A-32: Phalanx in 2 parts.

P.W.5A-34: Neural arch fragment of a cervical vertebra of a juvenile.

P.W.5A-35: Distal end of an ischium.

P.W.5A-36: Dorsal vertebra neural arch fragment of a juvenile.

P.W.5A-37: Cervical centrum of a juvenile.

P.W.5A-38: Dorsal vertebra neural arch fragment of a juvenile.

P.W.5A-39: Metopodal end.

P.W.5A-40: Anterior caudal centrum of a juvenile.

P.W.5A-42: Neural arch of a cervical of a juvenile.

P.W.5A-43: Neural arch of a dorsal vertebra of a juvenile.

P.W.5A-44: Proximal end of a scapula of a juvenile.

P.W.5A-45: Cervical vertebra.

P.W.5A-46: Left astragalus of a juvenile.

P.W.5A-47: Proximal end of a left metacarpal IV.

P.W.5A-48: Neural arch of a caudal vertebra.

P.W.5A-49: Distal end of indet. metacarpal.

P.W.5A-50: Half of a cervical vertebra.

P.W.5A-51: Caudal vertebra with elongated neural arch.

P.W.5A-52: Distal end of a pubis of P.W. 5A-8.

 

Locality: Phu Wiang site 5B, Amphoe Phu Wiang, Khon Kaen Province, northeastern Thailand.

Horizon: Sao Khua Formation, Khorat group.

Biostratigraphy:

Age: Early Cretaceous.

Material:

P.W.5B-1: Fibula.

P.W.5B-2: Incomplete sacral rib of a juvenile.

P.W.5B-3: Indeterminate metacarpal.

P.W.5B-4: Indeterminate metatarsal.

P.W.5B-5: Part of a chevron.

 

Locality: Phu Wiang site 6, Dong Keng, Amphoe Phu Wiang, Khon Kaen Province, northeastern Thailand.

Horizon: Sao Khua Formation, Khorat group.

Biostratigraphy:

Age: Early Cretaceous.

Material:

P.W.6-1, -4, -6: Anterior caudal vertebrae.

P.W.6-2, -3, -7, -10: Caudal vertebrae.

P.W.6-5, -8, -11, -: Chevrons.

P.W.6-9: Cervical vertebra in platter (number 6-8 in DMR).

P.W.6-: Ribs.

 

Locality: Phu Wiang site 7, Phu Noi, Amphoe Phu Wiang, Khon Kaen Province, northeastern Thailand.

Horizon: Sao Khua Formation, Khorat group.

Biostratigraphy:

Age: Early Cretaceous.

Material:

P.W.7-1: Phalanx.

P.W.7-2: Incomplete phalanx.

 

Locality: Phu Wiang site 5, Sum Ya Ka, Amphoe Phu Wiang, Khon Kaen Province, northeastern Thailand.

Horizon: Sao Khua Formation, Khorat group.

Biostratigraphy:

Age: Early Cretaceous.

Material:

Number: Not given: 2 vertebrae.

 

 

Locality: Phu Wiang site 11, Sum Bak Low, Amphoe Phu Wiang, Khon Kaen Province, northeastern Thailand.

Horizon: Sao Khua Formation, Khorat group.

Biostratigraphy:

Age: Early Cretaceous.

Material:

P.W.11-1: Cervical vertebra of a juvenile.

 

Locality: Kalasin site 1, Phu Pha Ngo, Kalasin Province, northeastern Thailand.

Horizon: Sao Khua Formation, Khorat group.

Biostratigraphy:

Age: Early Cretaceous.

Material:

K. 1-1: Sacral vertebra.

K. 1-2-4, -30: Dorsal vertebrae.

K. 1-5-14: Caudal vertebrae.

K. 1-15, -18, -19: Right pubes.

K. 1-16: proximal end of a right pubis.

K. 1-17: Distal end of a right pubis.

K. 1-20: Proximal end of a left fibula.

K. 1-21: Distal end of a left fibula.

K. 1-22: Chevron.

K. 1-23: Left tibia.

K. 1-24: Proximal end of a left tibia.

K. 1-25: Distal end of a left tibia.

K. 1-26: Proximal end of a right tibia.

K. 1-27: Distal end of a right tibia.

K. 1-28: Right humerus.

K. 1-29: Right scapula.

K. 1-32: Femur proximal end (the other end is in the Science Museum, Bangkok).

K. 1-33: Sacral rib.

K. 1-34: Distal end of a femur.

K. 1-35: Ungual phalanx.

K. 1-36: Left radius.

K. 1-37: Proximal end of a left radius.

K. 1-38: Distal end of a left radius.

K. 1-39: Metopod.

K. 1-: Femur.

K. 1-: Sternal plate.

K. 1-: Proximal end of a left scapula.

K. 1-: Right ilium.

K. 1-: Ribs.

 

Locality: Kalasin site 2, Ban Nong Mek, Kalasin Province, northeastern Thailand.

Horizon: Sao Khua Formation, Khorat group.

Biostratigraphy:

Age: Early Cretaceous.

Material:

K. 2-1, -3, -4: Anterior caudal vertebrae.

K. 2-2: Vertebra.

 

Locality: Khok Doo site 1, Udon Thai Province, northeastern Thailand.

Horizon: Sao Khua Formation, Khorat group.

Biostratigraphy:

Age: Early Cretaceous.

Material:

K.D.1-1: Ungual phalanx.

 

Locality: Khok Doo site 2, Udon Thai Province, northeastern Thailand.

Horizon: Sao Khua Formation, Khorat group.

Biostratigraphy:

Age: Early Cretaceous.

Material:

K.D.2-1: Right humerus.

 

BUFFETAUT, SUTEETHORN, LE LOEUFF, CUNY, TONG & KHANSUBHA, 2002

Locality: Khok Pa Suam, Ubon Ratchathani Province, Thailand.

Horizon: Khok Kruat Formation.

Biostratigraphy:

Age: Albian stage? Middle Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material:

Number: Not given: Teeth.

Note: Nemegtosaurid BUFFETAUT & SUTEETHORN, 2004.

 

Locality: Khok Pia locality, near the city of Khon Kaen, Ubon Ratchathani Province, Thailand.

Horizon: Khok Kruat Formation.

Biostratigraphy:

Age: Albian stage? Middle Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material:

Number: Not given: Pubis.

 

CHANTASTI, SUTEETHORN, NAKSRI, TONG, WONGKO & SONODA, 2019

Locality: "Phu Sung", eastern side of Phu Phang Rang, Muang Sakon Nakhon District, Sakon Nakhon Province, Thailand.

Horizon: Sao Khua Formation, Khorat Group.

Biostratigraphy:

Age: Barremian Stage, Lower Gallic Subepoch, Middle Early Cretaceous Epoch, Early Cretaceous.

Material:

Number: Not given: Peg-like tooth.

 

SUTEETHORN, LE LOEUFF, BUFFETAUT, SUTEETHORN, TALUBMOOK, & CHONGLAKMANI, 2009

Locality: Ban Na Khrai locality, Khagwat, Kalasin Province, NE Thailand.

Horizon: Sao Khua Formation.

Biostratigraphy:

Age: Early Cretaceous.

Material:

SM K11-0001 to SM K11-0167. Breakdown as follows (not all numbers were listed).

SM K11-0001: Right frontal.

SM K11-0002: Right postorbital.

SM K11-0002: Right squamosal.

SM K11-0003: Right squamosal.

SM K11-0004: Left quadrate.

SM K11-0005: Right quadrate.

SM K11-0006: Co-ossified braincase consistionf of supraoccipital, exoccipital-opisthotic, prootic, basioccipital and basisphenoid-parasphenoid.

SM K11-0007: Laterosphenoid-orbitosphenoid.

SM K11-0008: An isolated tooth.

SM K11-0009: Axis.

SM K11-0011, -0012: Cervical 4.

SM K11-0013: Cervical 5.

SM K11-0014: Cervical 6.

SM K11-0015: Cervical 7.

SM K11-0016: Cervical 8.

SM K11-0017: Cervical 9.

SM K11-0038: Dorsal 10.

SM K11-0039, -0040: Dorsal 11.

SM K11-0042: Dorsal 12.

SM K11-0043: Sacral 1.

SM K11-0044, -0046, -0048, -0050: Fused neural spines of sacral 1-4.

SM K11-0045: Sacral 2.

SM K11-0047: Sacral 3.

SM K11-0049: Sacral 4.

SM K11-0051, -0052: Neural spine and centrum of sacro-caudal/sacral 5.

SM K11-0053, -0054: Proximal-most caudal vertebra.

SM K11-0064: Proximal caudal vertebra.

SM K11-0075: Distal caudal vertebra.

SM K11-0082 to SM K11-0089: Distal-most caudal vertebrae.

SM K11-0092: Cervical rib. Note: With tooth marks.

SM K11-0147: Right ilium.

SM K11-0148: Right pubis.

SM K11-0149, -0150: Both ischia.

SM K11-0151: Rigth femur.

SM K11-0152: Left femur.

SM K11-0153: left fibula.

SM K11-0154: Right fibula.

 

SUTEETHORN, MARTIN, BUFFETAUT, TRIAMWICHANON & CHAIMANEE, 1995

Locality: Phu Kum Kao, Wat Sakawa, Kalasin Province, northeastern Thailand.

Horizon: Sao Khua Formation, Khorat group.

Biostratigraphy:

Age: Early Cretaceous.

Material:

Number: Not given: More or less disarticulated skeletons of at least 4 individuals, some skull material.