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Figure 7. One subtree from a in Two new basal crocodylomorph archosaurs from the Lower Jurassic and the monophyly of the Sphenosuchia

Figure 7. One subtree from a reduced consensus analysis using the RadCon program (Thorley & Page, 2000). The MPTs from the phylogenetic analyses with characters 22 and 23 ordered or replaced by binary characters produced slightly different sets of reduced consensus subtrees. This subtree, from the analysis with 22 and 23 ordered, shows the sphenosuchian Terrestrisuchus closer to the crocodyliforms Protosuchus and Alligator, a relationship not found in any subtree of the other analysis.

Figure 6 in Two new basal crocodylomorph archosaurs from the Lower Jurassic and the monophyly of the Sphenosuchia

Figure 6. Strict consensus (A) and Adams consensus (B) of 151 most parsimonious trees (MPTs) resulting from the PAUP analysis of the data matrix in Table 1 (outgroups omitted in figure). Each MPT has a length of 64 steps, a Consistency Index (C.I.) of 0.609, and a Retention Index (R.I.) of 0.679. Reanalysis with characters 22 and 23 recoded as pairs of additive binary characters recovered 38 MPTs, each with a length of 62 steps, and with a less resolved strict consensus, but the Adams consensus, C, shows much more resolution.

Figure 5 in Two new basal crocodylomorph archosaurs from the Lower Jurassic and the monophyly of the Sphenosuchia

Figure 5. Kayentasuchus walkeri gen. et sp. nov. Holotype. Lateral view of right ilium and femur. Abbreviations: at =?antitrochanter; tq = fourth trochanter; pi.t = possible homologue of pseudointernal trochanter in Hallopus (Walker, 1970). Scale bar = 1 cm.

Figure 1 in Two new basal crocodylomorph archosaurs from the Lower Jurassic and the monophyly of the Sphenosuchia

Figure 1. Litargosuchus leptorhynchus gen. et sp. nov. Skull in (A) dorsal and (B) ventral views. Abbreviations for Figs 1, 2: ao.f = antorbital fenestra; ar = articular; cb = ceratobranchial I; d = dentary; e.m = external mandibular fenestra; ec = ectopterygoid; en = external naris; f = frontal; j = jugal; l = lacrimal; m = maxilla; n = nasal; or = orbit; p = parietal; pl = palatine; pm = premaxilla; prf = prefrontal; po = postorbital; po.p = paroccipital process; pt = pterygoid; q = quadrate; sq = squamosal; sp. = splenial; v = vomer. Scale bar = 1 cm.

Figure 4 in Two new basal crocodylomorph archosaurs from the Lower Jurassic and the monophyly of the Sphenosuchia

Figure 4. Kayentasuchus walkeri gen. et sp. nov. Holotype skull. A, ventral view of the braincase with its floor removed. B, medial view of the side wall of the braincase. Abbreviations: bs.s = space within the body of the basisphenoid; en.d = endolymphatic duct; ls = laterosphenoid; m.an = mastoid antrum; ot = otoccipital; p = parietal; po.p = paroccipital process; pt.f = post-temporal foramen; pr = prootic; q = quadrate; so = supraoccipital; sq = squamosal; ve = vestibule; VIII = foramen for cranial nerve VIII (n. vestibulo-cochlearis). Scale bar = 1 cm.

Figure 2 in Two new basal crocodylomorph archosaurs from the Lower Jurassic and the monophyly of the Sphenosuchia

Figure 2. Litargosuchus leptorhynchus gen. et sp. nov. Skull in (A) left lateral and (B) right lateral views. Scale bar = 1 cm.

Figure 3 in Two new basal crocodylomorph archosaurs from the Lower Jurassic and the monophyly of the Sphenosuchia

Figure 3. Kayentasuchus walkeri gen. et sp. nov. Holotype skull. A, left lateral view of reconstructed skull; shape of dentary probably distorted during fossilization. B, posterior view of occiput as preserved. Abbreviations: ao.f = antorbital fenestra; d = dentary; e.m = external mandibular fenestra; f. m = foramen magnum; g = lateral groove on squamosal; j = jugal; l = lacrimal; m = maxilla; n = nasal; or = orbit; ot = otoccipital; p = parietal; pm = premaxilla; po.p = paroccipital process; pt.f = post-temporal fenestra; so = supraoccipital; sq = squamosal. Scale bar = 1 cm.

Figure 17 in A new early branching armored dinosaur from the Lower Jurassic of southwestern China

Figure 17. Life restoration of YUXISAURUS KOPCHICKI. The osteoderm arrangement is hypothetical but that includes many of the types of armor found with the skeleton.

Figure 15 in A new early branching armored dinosaur from the Lower Jurassic of southwestern China

Figure 15. 'Pup tent'-shaped osteoderm of YUXISAURUS KOPCHICKI in (A) posterior, (B) anterior, (C) ventral, (D) dorsal, and (E, F) side views. Scale bar equals 10 cm.

Figure 14 in A new early branching armored dinosaur from the Lower Jurassic of southwestern China

Figure 14. Six selected individual osteoderms of YUXISAURUS KOPCHICKI. Osteoderm 1 in (A) dorsal, (B) ventral, (C) posterior, and (D) anterior views; osteoderm 2 in (E) dorsal, (F) ventral, and (G) lateral views; osteoderm 3 in (H) dorsal, (I) ventral, and (J) lateral views; osteoderm 4 in (K) dorsal, (L) ventral, and (N) lateral views; osteoderm 5 in (N) dorsal, (O) anterior, and (P) lateral views; osteoderm 6 in (Q) dorsal, (R) ventral, and (S) lateral views. Scale bar equals 5 cm.

Figure 16 in A new early branching armored dinosaur from the Lower Jurassic of southwestern China

Figure 16. Phylogenetic relationships of YUXISAURUS within Thyreophora. (A) Strict consensus of the six most parsimonious trees (MPTs) recovered from analysis of the modified Norman, 2021 data set. (B) Strict consensus of the two MPTs recovered from analysis of the modified Maidment et al., 2020 data set. Bremer support values are shown adjacent to the nodes.

Figure 11 in A new early branching armored dinosaur from the Lower Jurassic of southwestern China

Figure 11. Right humerus of YUXISAURUS KOPCHICKI in (A) anterior, (B) lateral, (C) posterior, (D) medial, (E) proximal, and (F) distal views. Abbreviations: dpc, deltopectoral crest; f, fossa; h, humeral head; it, internal tuberosity; rc, radial condyle; tb, tubercle; uc, ulnar condyle. Scale bar equals 10 cm.

Figure 12 in A new early branching armored dinosaur from the Lower Jurassic of southwestern China

Figure 12. Distal end of right femur of YUXISAURUS KOPCHICKI in (A) posterior, (B) ventral, (C) lateral, (D) medial, and (E) dorsal views. Abbreviations: d, depression; icg, intercondylar groove; lc, lateral condyle; mc, medial condyle; nc, notch. Scale bar equals 10 cm.

Figure 13 in A new early branching armored dinosaur from the Lower Jurassic of southwestern China

Figure 13. Cervical and pectoral osteoderms of YUXISAURUS KOPCHICKI. Tripartite compound osteoderm (TPO) 1 in (A) anterior, (B) dorsal, and (C) posterior views. TPO 2 in (D) anterior, (E) dorsal, and (F) posterior views. Bipartite osteoderm (BPO) 1 in (G) anterior, (H) dorsal, and (I) medial views; BPO 2 in (J) anterior, (K) dorsal, and (L) posterior views; BPO 3 in (M) anterior, (N) dorsal, and (O) posterior views; BPO 4 in (P) anterior, (Q) posterior, and (R) dorsal views; and BPO 5 in (S) anterior, (T) posterior, and (U) dorsal views. Blade-like cervical spines in anterior and posterior views (V, W). Abbreviations: ls, lateral spine; mds, middle scute; ms, medial scute. Scale bar equals 10 cm.

Figure 10 in A new early branching armored dinosaur from the Lower Jurassic of southwestern China

Figure 10. Scapulae of YUXISAURUS KOPCHICKI. Distal part of right scapula in (A) lateral, (B) medial, (C) ventral, and (D) dorsal views. Proximal part of left scapula in (E) lateral, (F) medial, (G) ventral, and (H) dorsal views. Abbreviation: d, depression. Scale bar equals 10 cm.

Figure 7 in A new early branching armored dinosaur from the Lower Jurassic of southwestern China

Figure 7. Mandibular remains of YUXISAURUS KOPCHICKI. Posterior part of left hemimandible in (A) lateral, (B) ventral, (C) medial, and (D) dorsal views. Posterior part of right hemimandible in (E) lateral, (F) ventral, (G) medial, and (H) dorsal views. Abbreviations: af, adductor fossa; an, angular; c, concavity; cor, coronoid; cor.em, coronoid eminence; pr, prearticular; sa, surangular; sf, surangular foramen. Scale bar equals 5 cm.

Figure 8 in A new early branching armored dinosaur from the Lower Jurassic of southwestern China

Figure 8. Articulated series of the anterior-most cervical vertebrae (atlas, axis, and cervicals 3 and 4) of YUXISAURUS KOPCHICKI in (A) left lateral, (B) dorsal, (C) right lateral, (D) ventral, (E) posterior, and (F) anterior views. Atlas in (G) ventral view with interpretative diagram beneath. Abbreviations: ard, arrowlike depression; cvr, cervical rib; ns, neural spine; pap, parapophysis; poz, postzygapophysis; prz, prezygapophysis; ri, ridge; tp, transverse process. Scale bar equals 5 cm.

Figure 5 in A new early branching armored dinosaur from the Lower Jurassic of southwestern China

Figure 5. Photographs (left) and line drawings (right) of the braincase of YUXISAURUS KOPCHICKI in (A) dorsal, (B) ventral, (C) anterior, and (D) posterior views. Abbreviations: bo, basioccipital; bp, basipterygoid process; bs, basisphenoid; cp, cultriform process (parasphenoid rostrum); fm, foramen magnum; nt, 'V'-shaped notch; n. V, exit of trigeminal nerve; oc, occipital condyle; os, orbitosphenoid; pa, parietal; pap, paroccipital process; po, postorbital; pt, pterygoid; q, quadrate; qd, quadrate depression; sq, squamosal. Scale bar equals 5 cm.

Figure 1 in A new early branching armored dinosaur from the Lower Jurassic of southwestern China

Figure 1. Geographical and stratigraphic location of YUXISAURUS KOPCHICKI CVEB21701. (A) Location of the quarry yielding YUXISAURUS KOPCHICKI, with a red star indicating the locality. (B) Sediments of the Fengjiahe Formation at the quarry site. (C) Stratigraphic column of the Fengjiahe Formation in the Jiaojiadian area (modified from Bai, 1999).

Figure 6 in A new early branching armored dinosaur from the Lower Jurassic of southwestern China

Figure 6. Possible skull roof fragment of YUXISAURUS KOPCHICKI in (A) dorsal, (B) lateral, and (C) ventral views. Abbreviations: cd, channel-like depression; d, dome. Scale bar equals 5 cm.