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Niebla antiqua
Taxonomy
Niebla antiqua was named by Aranciaga Rolando et al. (2021). Its type specimen is MPCN-PV-796, a partial skeleton (Braincase, dentary, teeth, dorsal vertebrae, scapulocoracoid), and it is a 3D body fossil. Its type locality is Niebla type locality, Arriagada Farm, which is in a Campanian/Maastrichtian fluvial sandstone/mudstone in the Allen Formation of Argentina. It is the type species of Niebla.
Synonymy list
| Year | Name and author |
|---|---|
| 2021 | Niebla antiqua Aranciaga Rolando 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.
†Niebla antiqua Aranciaga Rolando et al. 2021
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. Aranciaga Rolando et al. 2021 | Abelisaurid theropod diagnosable on the basis of the following combination of characters (autapomorphies marked by an asterisk): 1) strongly thickened and heavily sculptured frontals, 2) frontals with deep longitudinal groove surrounding the supraorbital swelling*, 3) frontals with short bony platform for the contact with the nasal, 4) anteroposteriorly elongate supratemporal fenestra *, 5) parietal with posterolaterally oriented parietal alae*, 6) nuchal wedge of supraoccipital bone subequal in dorsoventral depth to the dorsoventral height of the occipital condyle*, 5) associated groove of the postemporal foramen completely enclosed by parietal and exoccipital-opisthotic bones*, 6) bony plate below the occipital condyle subrectangular in contour and dorsoventrally taller than transversely wide*, 7) forebrain with large olfactory tract and bulbs, and 8) paired laminae over the mesethmoid. |
Measurements
No measurements are available
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| Source: o = order | |||||
| Reference: Marsh 1875 | |||||
Age range: base of the Late/Upper Campanian to the top of the Early/Lower Maastrichtian or 83.60000 to 66.00000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Campanian - Early/Lower Maastrichtian | Argentina (Río Negro) | Niebla antiqua (type locality: 222575) |