As scientists continue to explore the quest to identify the world’s smallest vertebrate, for now, the Brazilian flea frog reigns supreme.

Our collections cover all of the living invertebrate phyla, including Onychophora (velvet worms), Chaetognatha (arrow worms), Gastrotricha (hairybacks), Kinorhyncha (mud dragons), Nemertea (ribbon ...

Invertebrates are animals that don’t have a spine or backbone inside their body. Minibeasts, like woodlice and centipedes, are all small invertebrates, but not all invertebrates are small.

A tiny Brazilian frog about the size of a pea may threaten the current record-holder for the world’s smallest vertebrate. The flea toad Brachycephalus pulex (actually a frog species) was first ...