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Ondogurvel alifanovi
Taxonomy
Ondogurvel alifanovi was named by Averianov and Lopatin (2022). Its type specimen is PIN 5838/1, a partial skeleton (includes fragments of two last dorsal vertebrae, three anterior sacral vertebrae, right ilium, left and right pubis and ischium, articulated right tibia, fibula), and it is a 3D body fossil. Its type locality is Nemegt locality (Barun Goyot site), which is in a Campanian/Campanian terrestrial sandstone/sandstone in the Baruungoyot Formation of Mongolia.
Synonymy list
| Year | Name and author |
|---|---|
| 2022 | Ondogurvel alifanovi Averianov and Lopatin |
| 2023 | Ondogurvel alifanovi Averianov et al. p. 69 |
| 2023 | Ondogurvel alifanovi Kubo et al. p. 2 |
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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.
†Ondogurvel alifanovi Averianov and Lopatin 2022
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. O. Averianov and A. V. Lopatin 2022 | The new taxon has several synapomorphies of Alvarezsauridae revealed by our phylogenetic analysis: paired flexor processes on proximal ventral surfaces of proximalmost phalanges (431(1)); distal flexor tubercle placement on pedal unguals (442(1)); ventral surface of manual ungual I weakly curved (443(1)); greater trochanter of femur anteroposteriorly expanded, forming a trochanteric crest (519(1)); lesser trochanter of femur completely fused to form crista trochanteris (520(2)): lesser trochanter of femur as proximal or more proximal than greater trochanter (522(2)); accessory ridge on lateral surface of tibial cnemial crest absent (536(0)). Differs from Xixianykus by presence of a vertical ridge on the medial side of the ischium distal to the obturator foramen, by a smaller diameter of the ischiadic shaft, by a relatively larger obturator foramen, by a larger space between the base of femoral neck and posterior margin of the bone, by the trochanteric crest of the femur having flat lateral side and anteriorly directed anterior margin, by the tibia less curved labially in transverse plane. Differs from Albinykus by the distal end of the tibiotarsus little expanded transversely relative to the shaft, by a less expanded proximal part of the fibula, and by a relatively shorter pedal phalanx II-1. Differs from Mononykus by a smaller prox- imocaudal process on the manual phalanx II-1, by a larger space between the base of the femoral neck and posterior margin of the bone, by lack of the fourth trochanter of the femur, by the distal end of tibiotarsus little expanded transversely relative to the shaft. Differs from Shuvuuia by the dorsally arcuate supraacetabular crest of the ilium and presence of the pubic obturator foramen. Differs from Parvicursor by the dorsally arcuate supraacetabular crest of the ilium, by the tibia less curved labially in transverse plane, by less expanded proximal part of the fibula, and by a relatively shorter pedal phalanx II-1. Differs from Ceratonykus by lack of the fourth trochanter of the femur and by the distal end of tibiotarsus little expanded transversely relative to the shaft. Differs from Linhenykus by a prominent outgrowth of medial facet on the extensor side of the carpometacarpus, by presence of the articular surfaces of the metacarpals III and IV along the lateral side of the carpometa- carpus, by the dorsally arcuate supraacetabular crest of the ilium, and by a relatively shorter pedal phalanx II-1. Differs from Nemegtonykus by having the anterior end of supraacetabuar crest placed more ventral compared with its posterior end, by the trochanteric crest of the femur having flat lateral side and anteriorly directed anterior margin, and by lack of the fourth trochanter of the femur. Differs from Albertonykus by the distal end of tibiotarsus little expanded transversely relative to the shaft. Additionally differs from all known alvarezsaurid taxa by the metatarsals II and IV fused over two thirds of their length (a possible autapomorphy). |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| References: Marsh 1875, Benton 1983 | |||||
Age range: base of the Middle Campanian to the top of the Late/Upper Campanian or 83.60000 to 72.20000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Campanian - Late/Upper Campanian | Mongolia (Omnogov) | Ondogurvel alifanovi (type locality: 37004) |