Haplognatha:

Megavegivendus crassicorpa

Classification

Kingdom: Microsynthera
Phylum: Plasticae
Class: Occlupania
Order: Toxodenta
Family:
Genus: Megavegivendus
Species: crassicorpa

Distinguishing Characteristics:

Dentitial Processes: one central process in the median of the oral groove.
External Processes: a toothless extra groove in the posterior region.

Size: huge! thick!
Colors: white.
Markings: "902T 34".
Other:

Host Organisms: unknown. Discovered on the floor of a farmer's market in San Francisco by Dr. Adam Martyn.
Life and Habits: This is without a doubt the biggest occlupanid ever found. While definitely a haplognathid, it's huge size and bizarre features leave much to the imagination.
Specimens: 1.