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Huayangosauridae
Taxonomy
Huayangosauridae was named by Dong et al. (1982). Its type is Huayangosaurus. It was considered monophyletic by Maidment et al. (2008).
It was assigned to Stegosauria by Ulansky (2014); to Stegosauria by Galton (1990), Carpenter et al. (2001), Blows (2001), Galton and Upchurch (2004), Tumanova and Alifanov (2018); and to Stegosauria by Olshevsky and Ford (1993), Maidment et al. (2008), Fonseca et al. (2024), Sánchez-Fenollosa and Cobos (2025).
It was assigned to Stegosauria by Ulansky (2014); to Stegosauria by Galton (1990), Carpenter et al. (2001), Blows (2001), Galton and Upchurch (2004), Tumanova and Alifanov (2018); and to Stegosauria by Olshevsky and Ford (1993), Maidment et al. (2008), Fonseca et al. (2024), Sánchez-Fenollosa and Cobos (2025).
Subtaxa
Entered
by M. Carrano on 2004-01-26; modified by M. Carrano on 2022-09-26
Synonymy list
| Year | Name and author |
|---|---|
| 1982 | Huayangosauridae Dong et al. |
| 1990 | Huayangosauridae Galton |
| 1993 | Huayangosauridae Olshevsky and Ford |
| 2001 | Huayangosauridae Blows p. 137 |
| 2001 | Huayangosauridae Carpenter et al. p. 73 |
| 2004 | Huayangosauridae Galton and Upchurch p. 344 |
| 2008 | Huayangosauridae Maidment et al. p. 390 fig. 11 |
| 2014 | Huayangosauridae Ulansky p. 4 |
| 2018 | Huayangosauridae Tumanova and Alifanov p. 1771 |
| 2024 | Huayangosauridae Fonseca et al. |
| 2025 | Huayangosauridae Sánchez-Fenollosa and Cobos p. 175 |
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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.
Fm. †Huayangosauridae Dong et al. 1982
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| S. C. R. Maidment et al. 2008 | All stegosaurs more closely related to Huayangosaurus than to Stegosaurus.
Unambiguous synapomorphies: • Anterior iliac process projects at an angle roughly parallel to the parasagittal plane (autapomorphic reversal) • Anterior iliac process strongly angled ventrally in lateral view (convergent in clade B stegosaurs and Euoplocephalus) |
Measurements
No measurements are available
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| Source: g = genus, o = order | |||||
| References: Kiessling 2004, Marsh 1875, Peczkis 1995 | |||||
Age range: base of the Early/Lower Bajocian to the top of the Late/Upper Bathonian or 170.90000 to 165.30000 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Bajocian | Argentina (Neuquén) | Isaberrysaura mollensis (184943) | |
| Bajocian - Oxfordian | China (Sichuan) | Huayangosaurus taibaii (24883) | |
| Late/Upper Bathonian | China (Gansu) | Baiyinosaurus baojiensis (235625) | |
| Bathonian - Callovian | China (Chongqing) | Bashanosaurus primitivus (205726) | |
| Bathonian - Callovian | China (Sichuan) | Stegosauria indet. (67236) |