STEGOSAURIA
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publication ID |
https://doi.org/ 10.1093/zoolinnean/zlaa061 |
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persistent identifier |
https://treatment.plazi.org/id/B66BDD2A-086B-FFD3-E316-7616FEDFE72D |
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treatment provided by |
Felipe |
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scientific name |
STEGOSAURIA |
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Clade STEGOSAURIA
Total characters under ACCTRAN 23, DELTRAN 22:
1. Quadrate head rectangular.
2. Pterygoids partially fused along the midline.
3. Maxillary and dentary crown surfaces bear long, vertical ridges.
4. Scapula blade stout and parallel-sided (homoplastic: also present in derived ankylosaurs).
5. Lateral profile of the ilium bowed dorsally (homoplastic: also present in derived ankylosaurs).
6. Postacetabular blade less than 30% of the length of the ilium (homoplastic: also present in derived ankylosaurs).
7. Supraacetabular crest projecting laterally and creating a partially laterally open cupola.
8. Pubis, the femoral articular surface forms a laterally facing oval depression.
9. Pubic shaft stout and bar-shaped.
10. Femur tall, narrow and straight-shafted.
11. Femoral anterior trochanter exhibits partial fusion with the greater trochanter (homoplastic in some nodosaurids).
12. Femoral 4 th trochanter forms a raised ridge (homoplastic: present also in basal ankylosaurs and nodosaurids).
13. Cnemial crest of tibia robust and curved (homoplastic: present in derived ankylosaurs).
14. Fibula stout, but smaller than the tibia (homoplastic: present in derived ankylosaurs).
15. Pedal digit 1 lost.
16. Parasagittal midline osteoderms form hypertrophied plates or spines.
17. Lateral flank osteoderms are absent (except for parascapular spines). One row of lateral flank osteoderms has been reported in Huayangosaurus ( Sereno & Dong, 1992: 340) but they reference an indistinct fieldwork photograph ( Zhou, 1984:pl. 1) of a partial articulated skeleton. I have been unable to identify these osteoderms, and none were mounted on the skeleton in plate 13.
18. Distal caudal osteoderms form tall, paired conical spines.
19. Parascapular spine present (secondarily lost in stegosaurines).
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