| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Riojavenatrix lacustris
Taxonomy
Riojavenatrix lacustris was named by Isasmendi et al. (2024). Its type specimen is CPI 1637–1648, 1675–1677, a partial skeleton, and it is a 3D body fossil. Its type locality is Virgen del Villar-1, Igea, which is in an Aptian terrestrial horizon in Spain. It is the type species of Riojavenatrix.
Synonymy list
| Year | Name and author |
|---|---|
| 2024 | Riojavenatrix lacustris Isasmendi et al. p. 5 |
Is something missing? Join the Paleobiology Database and enter the data
|
|
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.
†Riojavenatrix lacustris Isasmendi et al. 2024
show all | hide all
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| E. Isasmendi et al. 2024 | A medium- to large-sized spinosaurid theropod with the following unique combination of characters within Spinosauridae: (i) a lateromedially thick and triangular pubic boot in distal view, with a straight posterolateral margin (similar to Ichthyovenator, although in Ichthyovenator this margin is concave, but it is absent in Baryonyx, Suchomimus, and FSAC-KK 11888); (ii) an anteroposteriorly expanded ischial boot with an anterodorsally oriented tip and an angular anterodistal surface (absent in Ichthyovenator and FSAC-KK 11888; similar to Megalosaurus bucklandii); (iii) a narrow, restricted and relatively deep articular groove on the proximal surface of the femur, which is anteromedially–posterolaterally inclined (distinct from those of Baryonyx and Suchomimus); (iv) a medial femoral condyle with the long axis exhibiting only slight posteromedial orientation (distinct from those in Baryonyx, ‘Spinosaurus B’ (Nr.1922 X 45), Suchomimus, and FSAC-KK 11888); (v) presence of a vertical ridge on the medial margin of the ascending process of the astragalus (potential autapomophy, but it could also be a character in Spinosauridae because no other spinosaurid astragalus has been described to date); (vi) height of ascending process of the astragalus more than twice the height of the astragalar body (potential autapomophy, but it could also be a character in Spinosauridae because no other spinosaurid astragalus has been described to date); (vii) presence of an anterior depression with a dorsally located foramen on the lateral surface of the calcaneum (autapomorphy; absent in other spinosaurids); and (viii) absence of a longitudinal groove on the medial surface of phalanx I-2 (potential autapomophy, but it could also be a character in Spinosauridae or even in Megalosauroidea; given that this element is not preserved in other spinosaurids or megalosauroids, a synapomorphy cannot be excluded). |
Measurements
No measurements are available
|
|
||||
|
|
||||
|
|
||||
|
|
||||
|
|
||||
|
|||||
|
|
||||
|
|
||||
|
|
||||
| Source: o = order | |||||
| Reference: Marsh 1875 | |||||
Age range: Early/Lower Aptian or 121.40000 to 119.57000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Aptian | Spain (La Rioja) | Riojavenatrix lacustris (type locality: 238724) |