Articulated skeletons of the aetosaurTypothorax coccinarumCope (Archosauria: Stagonolepididae) from the Upper Triassic Bull Canyon Formation (Revueltian: early-mid Norian), eastern New Mexico, USA

A reappraisal of the taxonomic status ofAetosauroides(Archosauria, Aetosauria) specimens from the Late Triassic of South America and their proposed synonymy withStagonolepis

“…4E-F), Neoaetosauroides (Bonaparte, 1971), Aetosaurus (Schoch, 2007), Lucasuchus, Paratypothorax (Long and Murry, 1995), Coahomasuchus (Heckert and Lucas, 1999), Stagonolepis robertsoni (NHMUK R4788), and Stagonolepis wellesi (Long and Murry, 1995). In contrast, a reticular pattern is observed in Typothorax (Heckert et al, 2010), Redondasuchus , and Chilenosuchus (Desojo, 2003) and a random distribution (sensu Long and Ballew, 1985) is exhibited by Desmatosuchus smalli, Desmatosuchus spurensis, Longosuchus, and Acaenasuchus (Long and Ballew, 1985;Parker, 2005Parker, , 2008Parker and Martz, 2010). The dorsal eminence of MCP 13a-b-PV is proportionally lower through the entire dorsal region of paramedian osteoderms of Stagonolepis robertsoni (NHMUK R4788), Stagonolepis wellesi (Long and Murry, 1995), Aetosaurus (Schoch, 2007), Acaenasuchus (Long and Murry, 1995), and Paratypothorax (Long and Murry, 1995).…”

“…By contrast, in all other known aetosaurs, namely Stagonolepis robertsoni (NHMUK R4788;Walker, 1961), Stagonolepis olenkae (Sulej, 2010), Desmatosuchus smalli (Small, 2002), Aetosaurus ferratus (Schoch, 2007), Typothorax (Heckert et al, 2010: fig. 8a-b), Longosuchus (Parrish, 1994), and Neoaetosauroides (Bonaparte, 1971;Desojo and Báez, 2007), the maxilla forms part of the margin of the external naris (Fig.…”

“…4E), resembling Neoaetosauroides (Bonaparte, 1971) and Coahomasuchus (Lucas and Heckert, 1999). By contrast, spines are observed on the lateral dorsal osteoderms of Longosuchus, Desmatosuchus spurensis, Desmatosuchus smalli, Acaenasuchus, Typothorax, Paratypothorax, and Chilenosuchus (Heckert and Lucas, 1999;Desojo, 2003;Parker, 2008;Heckert et al, 2010). The sagital ridge of MCP 13a-b-PV becomes gradually more developed towards the sacral region.…”

Paleontology of the Bears Ears National Monument: history of exploration and designation of the monument

“…This major site preserves over 250 footprints on a single horizon in the Church Rock Member. It is dominated by tracks of Brachychirotherium (thought to be made by aetosaurs; see Heckert et al, 2010;, but Atreipus-like tridactyl prints are also preserved (Lockley and Hunt 1995;Hunt-Foster et al, 2016).…”

Osteology of the Late Triassic aetosaur Scutarx deltatylus (Archosauria: Pseudosuchia)

“…The carapace can be divided into four anteroposteriorly trending columns of osteoderms 204 (Heckert et al 2010). Those that straddle the mid-line are referred to as the paramedians and the 205 flanking osteoderms are called the lateral armor .…”