Pronunciation: AY-vi-uh-TIE-ran-iss Meaning: Grandmother Tyrant Author/s: Rauhut (2003) Synonyms: None known First Discovery: Guimarota, Portugal Chart Position: 431
Jurassic grandmother tyrantEtymologyAviatyrannus is derived from the Latin "avia" (grandmother) and "tyrannis" (feminine form of lizard). The species epithet, jurassica, refers to its Jurassic age.
DiscoveryThe remains of Aviatyrannis jurassica were recovered from a lignitic coal seam within the Alcobaca Formation at Guimarota, close to Leiria, Central Portugal.
The Holotype (IPFUB Gui Th 1) is a right ilium (hip bone), 90 mm long. A fragmentary ilium (IPFUB Gui Th 2) and another hip bone; a partial right ischium (IPFUB Gui Th 3) were also referred to Aviatyrannis by Oliver Rauhut in 2003, as were several teeth that Jens Zinke described in 1998.