Genus: Magnapaulia PRIETO-MARQUEZ, CHIAPPE, & JOSHI, 2012
Etymology: Latin, magna, "large"; refers to the unusually large size reached by at leat some specimens of this lambeosaurine, and paulia, honors Mr. Paul Haaga for his outstanding support to the resarch and public programs of the Natural History Museum of Los Angeles County and its Dinosaur Institute.

Species: laticaudus PRIETO-MARQUEZ, CHIAPPE, & JOSHI, 2012
= Lambeosaurus? laticaudus MORRIS, 1981
Etymology: Latin, latus, “broad, wide”, and Latin, cauda, “tail”.

Holotype: IGM 5845 (formerly LACM 17715)

Locality: LACM loc. 66168, north of Arroyo Del Rosario, Approximate Lat. 30'10"N, Long. 115'40"W, El Rosario, Baja California Del Norte, Baja California State, Mexico.

Horizon: "El Diesacado member" of the "El Gallo Formation," Rosiro Group.

Biostratigraphy:

Age: Maastrichtian (Late Campanian?) Stage, Uppermost Senonian Subepoch, Uppermost Gulf Epoch, Late Cretaceous.

Material: Left premaxilla, maxilla and jugal, right scapula, coracoid, humerus, 8 cervical and five sacral vertebrae, fragments of 3 dorsal vertebrae, several caudal centra, spinous processes, and part of the haemal arches, several ribs, left and right femora, left ischum and right tibia, right metatarsal III.

A) LACM 26757; B) 66168

Referred material:

IGM 5844 (formerly LACM 17712): 6 anterior, dorsal vertebrae and molds of scales.

IGM 5845 (formerly LACM 20874): Left ilium, left ischium, left and right pubes, left tibia.

IGM 5846 (formerly LACM 17705): 21 caudal vertebrae with haemal arches.

IGM 5847 (formerly LACM 17706): Left tibia.

IGM 5848 (formerly LACM 20876): Left tibia.

IGM 5849 (formerly LACM 17711): Pathologic left tibia.

IGM 5850 (formerly LACM 17704): Sacrum, left femur and tibia, right humerus.

IGM 5851 (formerly LACM 20990): Ischium and dorsal vertebrae.

IGM 5852 (formerly LACM 17702): Caudal vertebra and distal ends of ischia.

PRIETO-MARQUEZ, CHIAPPE, & JOSHI, 2012

LACM 17706: Left tibia.

LACM to Mexico 17707/IGM 7-66-3-4: Partial right humerus.

IGM 5846 (formerly LACM 17708): Ischium.

LACM to Mexico 17709/IGM 7-66-3-4: Dorsal vertebra.

LACM to Mexico 17710/IGM 7-66-3-4: Proximal region of dorsal rib.

LACM 17711: Left tibia.

IGM 5845 (formerly LACM 17712): Dorsal vertebra and numerous integumentary impressions.

LACM to Mexico 17713/IGM 7-66-3-4: Dentary fragment.

LACM 17716: Right humerus and humearl fragment.

LACM to Mexico 17717/IGM 7-66-3-9: Partial left fibula.

LACM 20873: Articulated series of 21 proximal to middle caudal vertebrae.

LACM 20874: Partial left dentary, nearly complete dorsal vertebrae, three caudal dorsal centra, 13 fragments of dorsal neural spines, 1 caudal centrum, nearly complete right ilium, proximal region and shaft fragmetn of left ischium, left pubis, distal processes of left and right ischia.

LACM to Mexico 20875/JHG (JJG) 61: Innominate distal end of ischium.

LACM 20876: Left tibia.

LACM 20884: Dentary and pubic fragments.

 

Comparrison of numbers between IGM and LACM...

IGM 5844 (formerly LACM 17712): 6 anterior, dorsal vertebrae and molds of scales.

PRIETO-MARQUEZ, et al,. 2012 LACM 17712: Dorsal vertebra and numerous integumentary impressions.

IGM 5845 (formerly LACM 20874): Left ilium, left ischium, left and right pubes, left tibia.

PRIETO-MARQUEZ, et al,. 2012 LACM 20874: Partial left dentary, nearly complete dorsal vertebrae, three caudal dorsal centra, 13 fragments of dorsal neural spines, 1 caudal centrum, nearly complete right ilium, proximal region and shaft fragmetn of left ischium, left pubis, distal processes of left and right ischia.


IGM 5846 (formerly LACM 17705): 21 caudal vertebrae with haemal arches.

PRIETO-MARQUEZ, et al,. 2012 LACM 17705: Articulated series of 11 proximal caudal vertebrae.

IGM 5847 (formerly LACM 17706): Left tibia.

PRIETO-MARQUEZ, et al,. 2012 LACM 17706: Left tibia.

IGM 5848 (formerly LACM 20876): Left tibia.

PRIETO-MARQUEZ, et al,. 2012 LACM 20876: Left tibia.

IGM 5849 (formerly LACM 17711): Pathologic left tibia.

PRIETO-MARQUEZ, et al,. 2012 LACM 17711: Left tibia.

IGM 5850 (formerly LACM 17704): Sacrum, left femur and tibia, right humerus.

PRIETO-MARQUEZ, et al,. 2012 LACM 17704: Tibia and femoral fragment.

IGM 5851 (formerly LACM 20990): Ischium and dorsal vertebrae.

IGM 5852 (formerly LACM 17702): Caudal vertebra and distal ends of ischia.

PRIETO-MARQUEZ, et al,. 2012 LACM 17702: Cervical and dorsal rib fragments, one proximal and one distal caudal vertebra, centrum and neural arch of a proximal caudal vertebra, and eight caudal neural spine fragments.

 

RAMIREZ-VELASCO, & HERNANDEZ-RIVERA, 2015

Locality:  Arroyo del Rosario North, El Rosario, Baja California Del Norte, Baja California State, Mexico.

Horizon: "El Diesacado member" of the "El Gallo Formation".

Biostratigraphy:

Age: Maastrichtian (Late Campanian?) Stage, Uppermost Senonian Subepoch, Uppermost Gulf Epoch, Late Cretaceous.

Material:

PRIETO-MARQUEZ, CHIAPPE, & JOSHI, 2012

LACM 17698: Cervical vertebra.

LACM 17699: Tooth.

LACM 17700: Tooth.

LACM 17702: Cervial and dorsal rib fragments, one proximal and one distal caudal vertebra, centrum and neural arch of a proximal caudal vertebra, and eight caudal neural spine fragments.

LACM to Mexico 17703/JHG (HJG) 61: Distal end of an innominate left ischium.

LACM 17704: Tibia and femoral fragment.

LACM to Mexico 20883/WJM 7-66-1-23: Numerous associated vertebral fragments.

LACM to Mexico 17700/WJM 6-66-1-6, 17699/WJM 6-66-1-5, 101172, 101170,  42706/HJG 704, 42706/HJG 704, 42649/HJG 689: Teeth.

 

Locality:  Arroyo del Rosario West, El Rosario, Baja California Del Norte, Baja California State, Mexico.

Horizon: "El Diesacado member" of the "El Gallo Formation".

Biostratigraphy:

Age: Maastrichtian (Late Campanian?) Stage, Uppermost Senonian Subepoch, Uppermost Gulf Epoch, Late Cretaceous.

Material:

PRIETO-MARQUEZ, CHIAPPE, & JOSHI, 2012

LACM 17705: Articulated series of 11 proximal caudal vertebrae.

LACM to Mexico 20885/WJM 7-66-2-1: Incomplete left fibula.

 

Locality:  Arroyo del Rosario, El Rosario, Baja California Del Norte, Baja California State, Mexico.

Horizon: "El Diesacado member" of the "El Gallo Formation".

Biostratigraphy:

Age: Maastrichtian (Late Campanian?) Stage, Uppermost Senonian Subepoch, Uppermost Gulf Epoch, Late Cretaceous.

Material:

IGM 5845 (formerly 26757): Incomplete right humerus and fibula.