Harpactocarcinus punctulatus (Crab)
Order: Decapoda Brachyura (crabs), Family Xanthidae, Species: Harpactocarcinus punctulatus
Eocene (33-55 Million Years Old)
Monte Baldo, Verona, Italy
(from 2002 Tucson Gem & Mineral Show)

See Harpactocarcinus punctulatus for full description.