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Viavenator exxoni
Taxonomy
Viavenator exxoni was named by Filippi et al. (2016). Its type specimen is MAU-Pv-LI-530, a partial skeleton, and it is a 3D body fossil. Its type locality is La Invernada (Bajo de la Carpa), which is in a Santonian fluvial horizon in the Bajo de la Carpa Formation of Argentina.
Synonymy list
| Year | Name and author |
|---|---|
| 2016 | Viavenator exxoni Cruzado-Caballero et al. p. 54 |
| 2016 | Viavenator exxoni Filippi et al. p. 210 fig. 1–8 |
| 2016 | Viavenator exxoni Fuentes p. 85 |
| 2019 | Viavenator exxoni Cruzado-Caballero et al. p. 212 |
| 2022 | Viavenator exxoni Gianechini et al. p. 60 |
| 2022 | Viavenator exxoni Méndez et al. p. 2 |
| 2022 | Viavenator exxoni Salem et al. p. 3 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Viavenator exxoni Filippi et al. 2016
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| L. S. Filippi et al. 2016 | The new taxon is characterized for the following autapomorphies (*) and characters combination: (1) absence of dorsal single or paired prominences in frontals; (2) dorsal edge of postorbital do not expanded with the jugal process anteriorly projected and anteroposteriorly narrow; (3*) parietal depression transversally compressed, on both sides of the supraoccipital crest; (4*) small paraoccipital processes with ventral edge located above the level of the dorsal edge of the occipital condyle; (5*) basioccipital e opisthotic complex, about two and a half times the width of the occipital condyle and almost twice the height of the occipital condyle in posterior view; (6*) high and well developed crest below the occipital condyle, diverging laterally toward the basal tubercles, defining the ventral subcondylar recess; (7*) basisphenoidal recess highly developed and deeply excavated, whose sub-circular contour opening ventrally oriented has a well-defined borders, with its major axis transversely positioned; (8*) basipterygoid processes, positioning horizontally the cranial roof, located on a level slightly upper to basal tubers; (9) anterior surface of cervical vertebrae with poorly developed articular condyle; (10) anterior projection of epipophysis in cervicals, which are well developed between the 4th and 7th element; (11*) mid and posterior cervicals centra with slightly convex lateral and ventral surfaces; (12*) hyposphene-hypanthrum articulation present from dorsal 2; (13*) interspinous accessory articulation system developed in middle and posterior dorsal vertebrae; (14*) presence of a pair of pneumatic foramina within the prespinal fossa in anterior caudal vertebrae; (15) anterior and mid caudal vertebrae with distal edge of the transverse process convex, and strong development of an anterior projection; (16*) distal end of the scapular blade posteriorly recurved. |
Measurements
No measurements are available
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| Source: o = order | |||||
| Reference: Marsh 1875 | |||||