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FYLAX

a hadrosauroid ornithopod dinosaur from Latest Cretaceous of Spain.
Pronunciation: FYE-laks
Meaning: Keeper
Author/s: Prieto-Márquez and Farias (2021)
Synonyms: None known
First Discovery: Lleida province, Spain
Discovery Chart Position: #1045

Fylax thyrakolasus

(Keeper of the Gates of Hell)Etymology
In Greek, Fylax means "keeper". The species epithet, thyrakolasus (thy-ra-KO-la-sus), is derived from the Greek "thýra" (gate) and "kólasi" (hell). Combined, the name means "keeper of the gates of hell", in reference to its proximity to the Late Cretaceous mass extinction event.
ZooBank registry: urn:lsid:zoobank.org:act:97E63552-0A0B-4208-8F25-9161CA2731EF.
Discovery
The remains of Fylax were discovered in the Figuerola Formation near Fontllonga village, next to the c-13 road between the municipalities of Camarasa and La Baronia de Sant Oisme, Noguera county, in the southern reaches of the Montsec mountain range of Lleida province, Spain, in the early 1990s.
The holotype (IPS-36338) is a left dentary, the tooth-bearing bone of the lower jaw.
Estimations
Timeline:
Era: Mesozoic
Epoch: Late Cretaceous
Stage: Maastrichtian
Age range: 66.5-66 mya
Stats:
Est. max. length: ?
Est. max. hip height: ?
Est. max. weight: ?
Diet: Herbivore
References
• Casanovas ML, Pereda Suberbiola XP, Santafé JV and Weishampel DB (1999) "A primitive euhadrosaurian dinosaur from the uppermost Cretaceous of the Ager syncline (southern Pyrenees, Catalonia)". Geologie en Mijnbouw, 78: 345-356.
• Prieto-Márquez A and Farias MAC (2021) "A new late-surviving early diverging Ibero-Armorican duck-billed dinosaur and the role of the Late Cretaceous European Archipelago in hadrosauroid biogeography". Acta Palaeontologica Polonica, 66(2): 425–435
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To cite this page:
Atkinson, L. "FYLAX :: from DinoChecker's dinosaur archive".
›. Web access: 07th Mar 2026.
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