[2][5] Both morphologically and stratigraphically, Scutarx can be distinguished from the closely related taxa Calyptosuchus wellesi and Adamanasuchus eisenhardtae.

[5] Some of the most commonly discovered vertebrate fossils in the Petrified Forest National Park (PEFO), Arizona's Upper Triassic Chinle Formation are aetosaurs.

[3] Aetosauria is an early-diverging clade of pseudosuchians, which played a significant role in a variety of Late Triassic terrestrial faunas with a widespread range and high species diversity.

[4] Measuring between one and three meters in length, with strongly armored bodies and tails, it had a crucial ecological function of being the earliest and one of only two clades of big herbivorous archosaurs from the Late Triassic.

Scutarx deltatylus has been identified through phylogenetic analysis as the sister taxon of Adamanasuchus eisenhardtae and Calytosuchus wellesi, all forming a clade within Desmatosuchinae.

There are broader, anteroposteriorly directed grooves anteriorly and laterally over the rounded orbits that indicate the higher center of the frontals.

The frontals' anterolateral edges are dorsoventrally thick, rugose, anteromedially sloping regions that are posteriorly bordered by a narrow, curving ridge.

The top part of the skull's back is made up of posterior flanges posteroventrally sloping contours that make connection with the opisthotics' paroccipital processes ventrally.

[2][1] Unlike those of other aetosaurians like Stagonolepis robertsoni and Aetosauroides scagliai, the basal tubercle and the basipterygoid processes of Scutarx deltatylus have a broad contact and are not elongate.

The dorsoventral and mediolateral sides of the centra are concave, forming distinct but shallow lateral fossae that make contact with the neural arch dorsally.

This produces a wide shelf for the posterior section of the neural arch of the previous vertebra when combined with the flat prezygapophyses.

The centroprezygapophyseal fossa (cprf), which is ventrolateral to the prezygapophysis, is a deep depression that is posteriorly bounded by the major strut of the transverse process.

The spine is mediolaterally enlarged at the distal end and is anteroposteriorly elongate, measuring the same length as the neural arch's proximal section.

[2][1] The neural spines and transverse processes of the mid- and posterior trunk vertebrae of Scutarx deltatylus differ noticeably from each other, and this coincides with the loss of distinct parapophyses and diapophyses along the series.

Regarding the existence of the different vertebral laminae and related fossae, the properties of the neural spine are the same as those of the mid-trunk vertebrae.

Fossil records show that the prezygodiapophyseal laminae of the mid and posterior trunk vertebrae have significantly more pronounced development and lateral extension when compared to neural spines.

[2][1] A robust, wide sacral rib that laterally extends anterodorsally to touch the posterodorsal border of the left ilium is a recognizable feature of this element.

[2][1] An extended, thin "tube" that bends anteroventrally and widens medially into two broad sheets of bone that meet in a median symphysis makes up the pubis' body.

The front and posterior contours of the pubic are convex, rarely extending over the puboischiadic plate's ventral edge dorsoventrally due to its short length.

As opposed to the robust, knob-like projections, the distal extremities of the pubes are shaped like elongate commata, which are thin and curve towards the symphysis.

A unique character of the pubis of Scutarx deltatylus is the presence of two large pubic foremen, a characteristic seen in only one other aetosaur.

[2][1] While comparable and have a wider width/length ratio of 2.05 than their more anterior counterparts, the cervical paramedian osteoderms lack a pronounced sigmoidal lateral border.

Although there might be an individual difference, the dorsal eminence is significantly offset medially and slightly more developed, becoming elevated and more pyramidal in form.

[2][1] The anterior bar is consistently wide over the osteoderm's lateral section, but it dramatically narrows medially before swelling once again at the anteromedial projection, making it profoundly concave.

[2][1] For Scutarx deltatylus, the trunk-caudal transition exhibits a noticeable height increase from the mid-trunk area to the anterior dorsal caudal region.