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Genus Protolophus

Havest Man? - Protolophus Harvestman - Protolophus Harvestman up high on a flower - Protolophus tuberculatus harvestman - Protolophus niger - male Protolophus sp. - Protolophus niger - male
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Chelicerata (Chelicerates)
Class Arachnida (Arachnids)
Order Opiliones (Harvestmen)
Suborder Eupnoi
Superfamily Phalangioidea
Family Protolophidae
Genus Protolophus
8 described species in genus Protolophus:
P. cockerelli, P. differens, P. niger - G & G 1942
P. dixiensis - Chamerberlin 1925
P. longipes - Schenkel 1951
P. rossi - G & G 1943
P. singularis, P. tuberculatus - Banks 1893

Genus badly in need of revision
Immatures and adult females with medial "thumb" process on patella of pedipalp. *This character also found in some Phalangiidae, and some Trachyrhinus*

Male palpal femur and tibia robust, sometimes greatly enlarged; male palpal tarsus narrowing abruptly; palpal tarsus generally equal to or shorter than tibia

Pacific States (California, Oregon, Washington), Arizona, southern Utah
Open forest and woodlands, grasslands
Adults mature in the Spring + early Summer
Some Protolophus species show evidence for male dimorphism. Some males in the population will have massive, robust pedipalps, while other adult males have slender "female-like" palps (*but lack the patellar apophysis seen in females).
Print References
Goodnight, CJ. & ML. Goodnight, 1942. The genus Protolophus (Phalangida). American Museum Novitates, New York, 1157: 1-7. (PDF from AMNH Digital Library)

Goodnight, CJ. & ML. Goodnight, 1943. New and little known phalangids from the United States. The American Midland Naturalist, Notre Dame, Indiana, 29(3): 643-656. online PDF

Schenkel, E. (1951) Spinnentiere aus dem westlichen Nordamerika, gesammelt von Dr. Hans Schenkel-Rudin. Zweiter Teil. Verhandlungen der Naturforschenden Gesellschaft in Basel, 62, 24–62. online PDF
Internet References
~ - Comparison image.