Acanthosphaera (Rhaphidocapsa) stalactites Clark and Campbell 1945.jpg
Citation: Acanthosphaera stalactites Clark & Campbell 1945Rank: speciesDescribed on page(s) : p.16Type specimens: pl.5, fig.4Family (traditional): ActinommidaeFamily (modern): Actinommidae
Original Description Simple, hollow, globular lattice-shell having 4 similarly circular pores of the same diameter on a radius; a raised, hexagonal meshwork encloses the single pores which lie at the bottom of a depressed, hyaline area within the pore-frames; 8 similar, basally flared radial spines, regularly opposite in pairs perpendicular to one another, exceed the shell-diameter by about 20 per cent; these spines are 3-bladed, prismatic with similar apically sharp points and angular interfaces (the spines as a whole mostly deflected in the distal 0.3); each blade bears at its middle a transverse ramule which is twice repeatedly branched; these ramules are again branched so that the total number of branches is 12.
Diameter of shell 62µm, of pores 10µm; length of radial spines 87µm. Distinguishing characters (rw): The repeated branching of the ramules of the spine-blades recalls a nearly similar condition in Hexancistra quadricuspis Haeckel (1887), but in that species the branches are terminal and much larger, and the radial spines as a whole are different in form. Translation: Size: Etymology: Extra details from original publication
Editors' Notes [The authors here list Acanthosphaera stalactites under the subgeneric name Rhaphidocapsa and include the subgeneric name in the species name.
Clark, B. L. & Campbell, A. S. (1945b). Radiolaria from the Kreyenhangen Formation near Los Banos, California. Geological Society of America, Memoir. 1-66. gs
Acanthosphaera stalactites compiled by the radiolaria@mikrotax project teamviewed: 29-1-2023