Favoritos de hydrophilus

Head of a remarkable structure, completely unlike any other pauropoda. Closest analogue I can think of is some members of Brachypauropodidae. Antennal segments extremely short and flattened, 4 in number. Tergal antennal branch very small, bearing a well developed flagellum. Sternal antennal branch very large, bearing a globulus and three flagella, one of which is less well developed than the rest. Globulus with an outer ring of around 12 bracts and an inner ring of 3 bracts. All flagelli, with the possible exception of the smallest on the sternal branch, with a biramous calyx in the form of a larger appendage curving around the smaller. Temporal organ of the form seen in Millotauropus. Collum indistinct, invisible in a dorsal view and without any setae. Setae of trunk extremely small, sparse, and spinelike. T1-4 filamentous, bristly. T5 thicker, ciliate. Pygidium dorsum in adults with at least 4 setae. Pygidium sternum in adults with 6 setae. Both the tergite and sternite are very thick, and completely envelop the anal plate(if present, may be replaced by cuticular appendages like in Polypauropodidae.) Last pair of legs, and maybe first, with only 4 segments. All other legs with 5 segments. All legs nearly devoid of the usual setae, what's present being highly reduced. Empodium of two claws and a pad.

Definitely a new species. Entirely subterannean in habits, seemingly very restricted in range and only found on forested mountains in Marin and Sonoma county. Probably fairly sensitive to development and habitat disturbance.