Fibrosphaera minutissima Colom, 1935, p.12, pl.2, fig.8; text-fig.4a (four specimens). Name not validly published: holotype
not designated. Originally Fibrosphaera (name not validly published), subsequently Stomiosphaera (name not
validly published), thirdly Colomisphaera (name not validly published), fourthly Schizosphaerella (name not validly
published). Designation of a holotype was a requirement of the ICZN at the time that Colom (1935) proposed this
name. Age: late Early Jurassic.