Asprosaurus: 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
Asprosaurus
Asprosaurus bibongriensis (Asprosaurus · Asprosaurus)
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 estimated skull length of about 18–20 cm is about the short side of an A4 sheet of paper (21 cm) (Comparison).
- 💡 In Bibong-ri, Boseong-gun, Bibong Dinosaur Park features an outdoor exhibition hall and observation deck where visitors can tour the dinosaur egg fossil site (Boseong-gun tourism guide).
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
Asprosaurus bibongriensis is a very large lizard that lived on the Korean Peninsula during the Late Cretaceous and shares features with monstersaurians (relatives of Heloderma). It is the first Mesozoic lizard fossil reported from the Korean Peninsula.
🦴 2. Anatomy & Morphology
It was a stout-limbed terrestrial lizard with an estimated skull length of about 180–200 mm. Because its fossil bones are bright white, it was given a name meaning 'white lizard'.
🔍 3. Fossil Record & Paleoecology
Based on the frequent occurrence of large lizard fossils at dinosaur egg sites, the paper suggests that it had feeding habits similar to those of modern beaded lizards and Gila monsters.
🇰🇷 4. Connection to Korea
It was collected in 2000 from the dinosaur egg fossil site in Bibong-ri, Deungnyang-myeon, Boseong-gun, Jeollanam-do, which is designated as Natural Monument (Korea) No. 418. More than 200 dinosaur eggs and fossils of the ornithopod dinosaur Koreanosaurus have also been found at the site.
📚 Sources & References
- • Fossil taxon — the IUCN Red List assesses only species living or extinct since 1500
- • paleobiodb.org — basicTaxonInfo
- • discovery.ucl.ac.uk — 1469877
- • doi.org — j.cretres.2015.03.001
- • heritage.go.kr — culSelectDetail.do
- • boseong.go.kr — bibong dino fossil
Recorded dimensions are widely cited representative estimates from public literature and may vary by study or specimen.