Genus: Scutarx PARKER, 2016
 Etymology: Latin, scutum, "shield" and Latin, arx, "fortress"; shield fortress.

Species: deltatylus PARKER, 2016
Etymology: Greek, delta, "delta" and Greek, tylos, "knob, knot, swelling, callous, protuberance"; triangualr protuberance.

Holotype: PEFO 34616

Locality: Battleship N locality (PFV 169), Petrified Forest, Apache County, Arizona.

Horizon: Lower part of the Sonsela Member, Chinle Group.

Biostratigraphy:

Age: Late Adamanian, Middle Norian Epoch, Middle Late Triassic Epoch, Late Triassic.

Material:Partial skull, cervical paramedian and lateral osteoderms.

Referred material:

PEFO 31217: Much of a postcranial skeleton including vertebrae, ribs, poectoral and pelvic girdles, and osteoderms.

PEFO 34919: Much of a postcranial skeleton including vertebrae, ribs, osteoderms, and ilium.

PEFO 34045: Much of a postcranial skeleton including vertebrae, ribs, and ostederms.

Locality: Nazlini 1 (UCMP V3205), 11 km north of Nazili Trading post, Nazlini Area, Petrified Forest, Apache County, Arizona.

Horizon: Lower Petrified Forest Formation, Chinle Group.

Biostratigraphy:

Age: Late Adamanian, Middle Norian Epoch, Middle Late Triassic Epoch, Late Triassic.

Material:

UCMP 36656: Paramedian plate, well preserved.

Locality: Texas.

Horizon: Middle part of the Cooper Canyon Formation, Dockum Group.

Biostratigraphy:

Age: Late Adamanian, Middle Norian Epoch, Middle Late Triassic Epoch, Late Triassic.

Material:

TTU P-09420: 2 paramedian osteoderms.

LESSNER, PARKER, MARSH, NESBITT, IRMIS & MUELLER, 2018

Locality: Headquarters NorthWest (MOTT 3899), Garza County, Texas.

Horizon: Middle Cooper Canyon Formation.

Biostratigraphy:

Age: Revueltian, Norian Stage, Late Triassic Epoch, Late Triassic.

Material:

TTU-P 10195: Left paramedian osteoderm.

 

= Calyptosuchus wellesi LONG & BALLEW, 1985

Locality: Agate Bridge Northwest, PEFO 085066 (UCMP V82249, PF 162), SW 1/4 of NE 14, Sec, 4, T 17N, 24E, Lot’s Wife Area, Petrified Forest, Apache County, Arizona.

Horizon: Lower Petrified Forest Formation, Chinle Group.

Biostratigraphy:

Age: Latest Carnian Stage, Late Triassic Epoch, Late Triassic.

Material:

UCMP 126844: Partial carapace with a dozen well-preserved paramedian scutes.

 

Locality: Nazlini 1 (UCMP V3205), 11 km north of Nazili Trading post, Nazlini Area, Petrified Forest, Apache County, Arizona.

Horizon: Lower Petrified Forest Formation, Chinle Group.

Biostratigraphy:

Age: Latest Carnian Stage, Late Triassic Epoch, Late Triassic.

Material:

UCMP 35738: Paramedian plate.

 

Locality: Lower Billings Gap of C. L. Camp, (UCMP Loc. 7042). NE 14 Sec. 25, T 18N, R 24E, Blue Mesa Area, Petrified Forest, Apache County, Arizona.

Horizon: Lower Petrified Forest Formation, Chinle Group.

Biostratigraphy:

Age: Latest Carnian Stage, Late Triassic Epoch, Late Triassic.

Material:

UCMP 84916: A nearly complete right paramedian scute of the dorsal region.

 

= Stagonolepis sp PARKER & IRIMIS, 2005

Locality: Near old Highway 180 (PFV 304), Petrified Forest, Apache County, Arizona.

Horizon: Several meters above the Rainbow Forest Bed of the Sonsela Member, Middle Petrified Forest Formation, Chinle Group.

Biostratigraphy:

Age: Latest Carnian Stage, Late Triassic Epoch, Late Triassic.

Material:

PEFO 34045: Carapace.