Invertebrate Chordates Part 1: Subphylum Cephalochordata (Lancelets)

Many people presume that all members of Chordata have a backbone, but that actually is not true. Vertebrates have backbones, meaning members of subphylum Vertebrata. There are two other subphyla within Chordata, those being Cephalochordata and Tunicata, and these are considered invertebrate chordates. Let's take these one by one, starting with Cephalochordata, also known as the lancelets.