Genus: Aetosauroides CASAMIQUELA, 1960
Etymology: Aetosaurus and Greek, oides,"similar, like."
= Polesinesuchus ROBERTO-DA-SILVA, DESOJO, CABREIRA, AIRES,
MÜLLER,
PACHECO, & DIAS-DA-SILVA, 2014
Etymology: The generic name is derived from the name of the municipality
from where the specimen was recovered (Sao Joao do Polesine, Rio Grande do
Sul State),
and Greek, suchos, "crocodile."
Species: scagliai CASAMIQUELA, 1960
Etymology:
Holotype: PVL No. 2059
Locality: Hoyadade Ischigualsto, Department of Valle Fertil, Rio Grande do Sul State, Brazil.
Horizon: Cancha de Bochas Member, Ischigualsto Formation.
Biostratigraphy: Hyperodapedon Assemblage Zone.
Age: Late Carnian Stage, Late Triassic Epoch, Late Triassic.
Material: Most of a skull and dentary, 2 cervical vertebrae, humerus, ulna and radius, stragous, plates.
Breakdown as follows;
Nro. 2073-1: Left femur.
Nro 2073-2: Right femur.
Nro. 2073-3: Left humerus.
Nro. 2073-4: Radius.
Nro. 2073-5: Ulna.
Nro. 2073-6: Incomplete right humerus.
Nro. 2073-7: Tibia lacking its distal end.
Nro. 2073-8: Fibula.
Nro. 2073-9, 2073-10, 2073-19, 2073-20: Metatarsals.
Nro. 2073-11. Articulated and complete ilia.
Nro. 2073-14: 7 incomplete ribs including 2 proximal ends articulated to thier corresponding anterior dorsal vertebrae, almost complete right scapula.
Nro. 2073-15. Articulated proximal portion o fleft scapula, coracoid, interclavicle, and clavicle.
Nro. 2073-16. almost complete and articulated ischia.
Nro. 2073-17, 2073-18: Pubes lacking distal ends.
Nro. 2073-21: Scute.
Nro. 2073-22: Ventral armor.
Nro. 2073-30: Probable proximal tarsal.
Nro. 2073-31: Fibula, astragalus, and distal tarsal.
Nro. 2073-32: Ungueal phalange.
Nro. 2073-33, 2073-34: Metacarpals?
Nro. 2073-35, . 2073-37: Pedal non-terminal phalanges.
Nro. 2073-39: Fragments of indeterminate osteoderms.
Nro. 2073-40: Anterior cervical vertebrae.
Nro. 2073-43: Appendicular osteoderms.
Nro. 2073-48: Paramedian and left lateral osteoderms of the cervical, dorsal, sacral, and caudal regions.
Nro. 2073-53: Some indeterminate fragments of bone.
Referred material:
PVL No. 2014: Incomplete femur, plates.
FMNH PR 509: Cast of Holotype.
PVL. 2052: Partial skeleton.
Note: Stagonolepis wellesi per HECKERT & LUCAS, 2002Breakdown as follows;
PVL. 2052/1: Middle section of skull and dentary.
PVL. 2052/2: Portion of mandible, fragment of crania.
PVL. 2052/3: Fragment of crania.
PVL. 2052/4: Distal end of humerus.
PVL. 2052/5: Portion of radius.
PVL. 2052/6, 2052/7: Proximal end of femora.
PVL. 2052/8: Distal end of femur..
PVL. 2052/9: Tibiae
PVL. 2052/10: Fragment of tibia.
PVL. 2052/11: Fragment of fibula.
PVL. 2052/12, 2052/13: Pes.
PVL. 2052/14: Pelvis.
PVL. 2052/15: Sacrum.
PVL. 2052/16, 2052/17: Presacral vertebrae.
PVL. 2052/18, 2052/19, 2052/20: Caudal vertebrae.
PVL. 2052/21: Caudal scutes.
PVL. 2052/22: Fragment of centra.
PVL. 2052/23, 2052/24, 2052/25: Dorsal scutes.
PVL. 2052/26: Pectoral scutes.
PVL. 2052/27: Ventral scutes.
PVL. 2052/28: Apendicular scutes.
DESOJO & EZCURRA, 2011
UFSM 11070a (a single specimen that was collected and housed by three different insitiutions: MCP, UFRGS, UFSM): 7 dorsal and caudal vertebrae, dorsal ribs, and several paramedian osteoderms associated with rhynchosaur remains.
UFSM 11505: Fragmentary skeleton.
UFRGS: 2 fragmentary dorsal vertebrae, complete right articulated metacarpus, 3 non-ungual phalanges, right femur, probable distal end of tibia, dorsal ribs, several paramedian and appendicular osteoderms.
MCP-3450-PV: Fragmentary basicarnium, distal half of metatarsal IIIor IV, 1 anterior and 1 posterior cervical centa, several dorsal and caudal vertebrae, including a series of 4 articulated dorsals with associated paramedian osteoderms and dorsal ribs, complete right and fragmentary left calcaneum, several fragments of dorsal ribs, a cheveron and several parameidan osteoderms.
PAES-NETO, DESOJO, BRUST, SCHULZ, DA-ROSA & SOARES, 2021
MCN-PV-2347: Fragmentary skeleont.
DESOJO, FIORELLI, EZCURRA, MARTINELLI, RAMEZANI, da ROSA, von BACZKO, TROTTEYN, MONTEFELTRO, EZPELETA & LANGER, 2020
Locality: Hoyada del Cerro Las Lajas, La Rioja Province, Argentina.
Horizon: Lower Middle Ischigualsto Formation.
Biostratigraphy:
Age: Carnian Stage, Lower Late Triassic Epoch, Late Triassic.
Material:
CRILAR-Pv 580: Sevral fragmentary teeth, 2 fragmentary vertebral centra, numerous fragments and natural casts of paramedian, ventral, and appendicular osteoderms, fragmentary ribs, right fragmentary coracoid, proximal end of right humerus, proximal end of both ulnae, distal end of left tibia, and distal end of metatarsal.
= Stagonolepis sp LUCAS & HECKERT, 2001 (moved to Aetosauroides scagliai by Desojo & Excurra, 2011).
Locality: Inhamanda locality, near Sao Pedro, Rio Grande do Sul State, Brazil.
Horizon: Alemoa Member, Santa Maria Formation.
Biostratigraphy:
Age: Carnian Stage, Lower Late Triassic Epoch, Late Triassic.
Material:
MCP 13a, b: Parts of the dorsal and ventral carapace.
NETO, DESOJO, BRUST, RIBEIRO, SCHULTZ & SOARES, 2021
Locality: Inhamanda 1 locality, near Sao Pedro, Rio Grande do Sul State, Brazil.
Horizon: Alemoa Member, Upper Santa Maria Formation.
Biostratigraphy: Hyperodapedon Assemblage Zone.
Age: Early Carnian Stage-Earliest Norian Stage, Late Triassic Epoch, Late Triassic.
Material:
MCP-13-PV: 6 articulated trunk vertebrae an articulated poriton of teh dorsal adn venral armor, several isoalted lateral adn ventral osteoderms and fragments of vertebrae, ribs and osteoderms.
Locality: Faixa Nova Site, within Santa Maria City, Rio Grande do Sul State, Brazil.
Horizon: Alemoa Member, Upper Santa Maria Formation.
Biostratigraphy: Hyperodapedon Assemblage Zone.
Age: Early Carnian Stage-Earliest Norian Stage, Late Triassic Epoch, Late Triassic.
Material:
UFSM 11070: A small specimen perserving most of the posterior portion of the postcranium but lacking the skull.
UFSM 11505: A small specimen with a well-preserved skull associated with the postcranium including armor.
MCP-3450-PV: A small specimen made up of a frgmenary skull and axial series with a few appendicualr elemetns and armor.
Locality: Piche site, Rio Grande do Sul State, Brazil.
Horizon: Alemoa Member, Upper Santa Maria Formation.
Biostratigraphy: Hyperodapedon Assemblage Zone.
Age: Early Carnian Stage-Earliest Norian Stage, Late Triassic Epoch, Late Triassic.
Material:
MCN-PV 2347: A skull associated with a fragmentary postcranium.
= Aetosauroides inhamandensis ZACARIAS, 1982 (nomen nudum)
Etymology:Holotype:
Locality: Inhamanda locality, near Sao Pedro, Rio Grande do Sul State, Brazil.
Horizon: Alemoa Member, Upper Santa Maria Formation.
Biostratigraphy:
Age: ?Ladianian Stage, Upper Mid Triassic Epoch or ?Early Carnian Stage, Lower Late Triassic Epoch, Late Triassic.
Material:
= Aetosauroides subsulactus ZACARIAS, 1982 (nomen nudum)
Etymology:Holotype: MCP 12a-b-PV
Locality: Rio Grande Do Sul State, Brazil.
Horizon: Santa Maria Formation.
Biostratigraphy:
Age: ?Ladianian Stage, Upper Mid Triassic Epoch or ?Early Carnian Stage, Lower Late Triassic Epoch, Late Triassic.
Material: Articulated partial dorsal and ventral carapaces, several isolated paramedian and ventral osteoderms, 6 complete and articulated mid- and posterior dorsal vertebrae, and some fragments of dorsal vertebrae and ribs.
= Polesinesuchus aurelioi ROBERTO-DA-SILVA, DESOJO, CABREIRA, AIRES, MÜLLER, PACHECO, & DIAS-DA-SILVA, 2014
Etymology: In honor of the physician Pedro Lucas Porcela Aurelio, a paleontology enthusiast from Rio Grande do Sul, Brazil.Holotype: ULBRA PVT003
Locality: Buriol outcrop, municipality of Sao Joao do Polesine, 29°39'34.2"S, 53°25'47.4"W, central region of the State of Rio Grande do Sul, southern Brazil.
Horizon: Santa Maria Supersequence, Santa Maria Formation.
Biostratigraphy: Hyperodapedon Assemblage Zone.
Age: Carnian Stage, Late Triassic Epoch, Late Triassic.
Material: A partial parietal, a well preserved basioccipital, cervical, dorsal, sacral and caudal vertebrae, anincomplete pectoral girdle (partial scapulae, coracoids, and interclavicle, two partial humeri and both ulnae, a right pelvic girdle (ilium, ischium, and pubis), parts of both hindlimes (femora, tibiae, both astragali, and left calcaneum), and pess (metatarsal III and V, unidentifiable phalanges, and two ungual phalantes, 10 isolated osteoderms form dorsal, ventral and appendicular region of the armor.