Gigantoscorpio

Gigantoscorpio willsi is an extinct species of scorpion^[2][3] which lived between 345.0 million and 342.8 million years ago, during the Visean age of the Carboniferous.^[4] Its type and only specimen is BMNH In. 42706a,b, In. 42707, which is a 3D body fossil of its exoskeleton found near modern-day United Kingdom.^[5] Three other specimens (GSE 2134, GSE 2137 and GSE 2174) were previously referred to this genus,^[6] but subsequent analyses disagreed with this referral and reclassified them as indeterminate scorpions.^[7] Based on the incomplete holotype, Gigantoscorpio is initially estimated at 36.5 cm (14.4 in) or 28–42 cm (11–17 in) long,^[1] but subsequently estimated at 39–44 cm (15–17 in) long.^[8]

Gigantoscorpio Temporal range: Visean, 345.0–342.8 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Subphylum:	Chelicerata
Class:	Arachnida
Order:	Scorpiones
Family:	†Gigantoscorpionidae
Genus:	†Gigantoscorpio Størmer, 1963[1]
Species:	†G. willsi
Binomial name
†Gigantoscorpio willsi Størmer, 1963[1]