Stylosphaeridae

Stylosphaeridae
	Stylosphaera flexuosa
Scientific classification
Domain:	Eukaryota
(unranked):	SAR
(unranked):	Rhizaria
Phylum:	Retaria
Subphylum:	Radiolaria
Class:	Polycystinea
Order:	Spumellaria
Family:	Stylosphaeridae; Haeckel, 1881
Genera
	Druppatractus ; Lithomespilus ; Praestylosphaera ; Protoxiphotractus ; Spongatractus ; Spongostylus ; Staurolonche ; Stylatractus ; Stylosphaera ; Xiphatractus

Stylosphaeridae is a family of radiolarians in the order Spumellaria. According to the original description by Ernst Haeckel, members of the family have a spherical central capsule within a fenestrated spherical siliceous shell, with two radial spines opposite in one axis. They are solitary. i.e. not associated in colonies.^[1]