Wannanosaurus: No measured body size data available to draw at scale.
- · Grid units represent actual meters (m); human and animals are drawn to the exact same scale with original silhouette aspect ratios preserved.
- · When a size range is recorded (e.g. 1–1.6m), the lower bound is used for scale comparison.
- · Human silhouette: PhyloPic — NASA · Public Domain Mark 1.0
Wannanosaurus
Wannanosaurus yansiensis (Wannanosaurus · Wannanosaurus)
Known only from fossils. The IUCN Red List assesses only species extant since 1500 CE, so fossil taxa are not assigned a category.
💡 Everyday Comparisons for Size, Mass & Speed
- 💡 Its lower jaw length of 59 mm is slightly longer than the short side of a credit card (about 54 mm) (Comparison).
- 💡 Its femur length of 90 mm is about 2/3 the length of a ballpoint pen (about 14 cm) (Comparison).
Reference standards: coach bus ~12 m, mid-size car ~4.9 m, compact car ~1 t, basketball hoop 3.05 m, credit card 8.56 cm.
📖 1. Overview
Wannanosaurus yansiensis (genus Wannanosaurus) was a small dome-headed dinosaur (pachycephalosaur) from Anhui Province, China, described by Lianhai Hou in 1977 as a basal pachycephalosaur.
🦴 2. Anatomy & Morphology
Its skull roof was flat and thick with large upper temporal openings (supratemporal fenestrae). Its lower jaw measured 59 mm long, its right femur 90 mm, and its tibia 87 mm, and its tooth crowns were strongly swollen.
🔍 3. Fossil Record & Paleoecology
In 1970, an Anhui provincial survey team found a partial skull, lower jaw, and postcranial bone fragments. Later studies have suggested that the specimen may have been a juvenile because its bone sutures were not fully fused.
🇰🇷 4. Connection to Korea
No direct record connecting this species to Korea has been found.
📚 Sources & References
- • Fossil taxon — the IUCN Red List assesses only species living or extinct since 1500
- • paleobiodb.org — basicTaxonInfo
- • wikidata.org — Q20719547
- • commons.wikimedia.org — File:Wannanosaurus-Paleozoological Museum of China.jpg
- • naturalhistory.si.edu — Hou 77.pdf
- • doi.org — journal.pone.0021092
Recorded dimensions are widely cited representative estimates from public literature and may vary by study or specimen.