taxonID	type	description	language	source
03EB87BE8C50FFC2FCA9FB2FFDBB504C.taxon	materials_examined	Holotype: UNIPAMPA 653, the holotype and, so far, only known specimen of Teyujagua paradoxa consists of an almost complete, well-preserved skull articulated with the complete lower jaws, the atlas – axis complex, cervical vertebrae III and IV and some tiny fragments of cervical vertebra V (Figs 1, 2; Table 1). Type horizon and locality: UNIPAMPA 653 was recovered from a fine sandstone layer with abundant carbonaceous concretions, about 5 m from the base of ‘ outcrop 5 ’, Bica São Tomé locality (Da-Rosa et al., 2009), Lower Triassic Sanga do Cabral Formation (SCF), Brazil (29 ° 36 ′ 56 ″ S, 55 ° 03 ′ 10 ″ W). The outcrop is dominated by fine reddish sandstones intercalated with coarse sandstones and intraformational conglomerates, indicating a vast alluvial plain occasionally flooded by shallow, braided streams (Zerfass et al., 2003; Da-Rosa et al., 2009; Pinheiro et al., 2016; Dias-da-Silva et al., 2017). An Induan – Olenekian age is inferred for SCF based on the presence of the parareptile Procolophon trigoniceps Owen, 1876, allowing the correlation between SCF and the upper Katberg Formation of the South African Karoo Basin (Botha & Smith, 2006; Dias-da-Silva et al., 2006, 2017). The type locality of Teyujagua paradoxa has already yielded the capitosauroid temnospondyl Tomeia witecki Eltink et al., 2016 (Eltink et al., 2017), still undescribed archosauromorph remains and abundant cranial and postcranial procolophonoid bones, including fairly complete skulls of P. trigoniceps (Da-Rosa et al., 2009; Dias-da-Silva et al., 2017; Silva-Neves et al., 2018). Tanystropheid archosauromorphs were also reported for other classic SCF localities (Oliveira et al., 2018). Emended diagnosis: Teyujagua paradoxa differs from all other known archosauromorphs on the basis of the following unique combination of characters (autapomorphies indicated by *): large, confluent external nares; external antorbital fenestrae absent; open lower temporal bars; lateral mandibular fenestrae present and positioned beneath the orbits when the lower jaw is occluded *; premaxillae lack anterodorsal processes; premaxillae bear posterodorsally directed palatal processes; anterior maxillary foramina absent; medial antorbital fossae present in maxillae; nasals are completely dorsal elements; lacrimals are broad and fill the space between the ascending and posterior processes of the maxillae; frontals have a small contribution to orbital rims; posterolateral processes of parietals elevated well above the skull roof; dorsal borders of the supratemporal fenestrae level with the dorsal margins of the orbits; squamosals with elongate ventral processes that reach a point level with the ventral margins of the orbits; wide, anteriorly open quadrate foramen; triangular supraoccipital; splenials exposed in lateral view; surangular shelves present; labiolingually compressed marginal teeth; marginal teeth distally carinated and bearing serrations; pterygoid dentition with a single tooth row on zone T 3, zone T 2 with two rows and zone T 4 present *; strong longitudinal lamina on the lateral surface of the axial centrum *; neural spine of cervical vertebra III with a rounded, posterior projection *. COMPARATIVE DESCRIPTION	en	Pinheiro, Felipe L, De Simão-Oliveira, Daniel, Butler, Richard J (2020): Osteology of the archosauromorph Teyujagua paradoxa and the early evolution of the archosauriform skull. Zoological Journal of the Linnean Society 189 (1): 378-417, DOI: 10.1093/zoolinnean/zlz093, URL: https://academic.oup.com/zoolinnean/article/189/1/378/5585773
