Maternal specimen AGM I-1 preserves embryonic and neonatal remains associated with the body, directly documenting pregnancy in an Early Triassic ichthyosauromorph.
Represented range248–248 Ma
RegionsMajiashan Quarry, Chaohu, Anhui, China; Procolumbites Zone
CladesChaohusaurus · Ichthyosauromorpha
Claim ledger
ecology · medium
Maternal specimen AGM I-1 directly documents pregnancy in Chaohusaurus through two embryos and an adjacent neonate, while head-first delivery and a terrestrial origin of viviparity remain orientation- and topology-based interpretations.