Plesion (Genus) Proschizomus Dunlop & Horrocks, 1996

Type and only species. Proschizomus petrunkevitchi Dunlop & Horrocks, 1996, by original designation.

Emended diagnosis. Medium-sized, fairly gracile Coal Measures whip scorpions with a prosomal dorsal shield uniquely drawn into a blunt anterior projection; prosomal shield not divided and lacking median eyes, with a ‘V’-shaped raised topology; pedipalps articulating at an angle of c. 45 Ǫ to the vertical plane and both patella and tibia with small apophyses. (Emended from Tetlie & Dunlop, 2008.)