![A skeltal mount of Pachcephalosaurus](http://upload.wikimedia.org/wikipedia/commons/thumb/f/fe/Pachycephalosaurus_in_Japan.jpg/100px-Pachycephalosaurus_in_Japan.jpg)
- ... that the hypothesis that the pachycephalosaurian dinosaurs used their domed skulls in head-butting competitions was first proposed in a work of science fiction?
- ... that the extinct Protosialis casca is one of only two known alderflies from the West Indies?
- ... that the extinct ant species Apterostigma electropilosum was described from a solitary fossil in amber?
- ... that the extinct species Trochodendron drachuckii is known from a single Eocene fossil found near Cache Creek, British Columbia?
- ... that Protostephanus was the first extinct wasp genus in the family Stephanidae to be described from a fossil?
![AnAcanthostichus hispaniolicus preserved in amber](http://upload.wikimedia.org/wikipedia/commons/thumb/a/a2/Acanthostichus_hispaniolicus_SMNSDO5205-1_02.jpg/100px-Acanthostichus_hispaniolicus_SMNSDO5205-1_02.jpg)
- ... that the extinct ant Acanthostichus hispaniolicus is the only Acanthostichus species found in the West Indies?
- ... that the Miocene ant Acropyga glaesaria is one of the oldest examples of trophobiosis?
- ...that the barnacle Megabalanus can reach 7 cm in length?
- ... that a new family of predatory cockroaches, named Manipulatoridae, has been discovered from amber found in the Hukawng Valley of Myanmar?
- ... that members of the extinct bivalve genus Hemiconcavodonta are unique in the subfamily Concavodontinae in that their teeth point in two directions?