Proceedings of the Biological Society of Washington
Synopia ultramarina is redescribed from the Gulf Stream and the Florida Keys and comments are made on the tangled taxonomy in Synopia. Tiron bellairsi, originally described from Barbados, is reported from Belize, at the opposite side of the Caribbean Basin. Garosyrrhoe bigarra, a Pacific species, is also reported from Belize, but no clear subspecific differences are detected as yet between Pacific and Atlantic populations.
J. L. Barnard and James Darwin Thomas. 1989. Four Species of Synopiidae from the Caribbean Region (Crustacea: Amphipoda) .Proceedings of the Biological Society of Washington , (2) : 362 -374. https://nsuworks.nova.edu/occ_facarticles/595.