Ce genre a été décrit par Chamberlin en 1930 dans les Garypidae.
Maorigarypus a été placé en synonymie par Chamberlin en 1943.
Idiogarypus a été placé en synonymie par Morris en 1948.
Publication originale
Chamberlin, 1930: «A synoptic classification of the false scorpions or chela-spinners, with a report on a cosmopolitan collection of the same. Part II. The Diplosphyronida (Arachnida-Chelonethida).» Annals and Magazine of Natural History, sér.10, vol.5, p.1-48 & 585-620.
↑Harvey, 2020: «Synsphyronus platnicki sp. nov.: first Synsphyronus (Pseudoscorpiones: Garypidae) from New Caledonia.» Arachnology, vol.18, no5, p.468-472.
↑Chamberlin, 1930: «A synoptic classification of the false scorpions or chela-spinners, with a report on a cosmopolitan collection of the same. Part II. The Diplosphyronida (Arachnida-Chelonethida).» Annals and Magazine of Natural History, sér.10, vol.5, p.1-48 & 585-620.
12Chamberlin, 1943: «The taxonomy of the false scorpion genus Synsphyronus with remarks of the sporadic loss of stability in generally constant morphological characters (Arachnida: Chelonethida).» Annals of the Entomological Society of America, vol.36, p.486–500.
↑Morris, 1948: «The taxonomic position of Idiogarypus hansenii (With).» Papers and Proceedings of the Royal Society of Tasmania, vol.1947, p.37–41.