Sceptrulophora

Sceptrulophora (from Ancient Greek, σκῆπτρον, skêptron - "sceptre" and -φόρος, -phóros - "bearing") is an order of hexactinellid sponges (glass sponges). They are characterized by sceptrules, a type of microsclere (microscopic spicule) with a single straight rod terminating at a bundle of spines or knobs. An anchor- or nail-shaped sceptrule is called a clavule. A fork-shaped sceptrule, ending at a few large tines, is called a scopule. A broom-shaped sceptrule, ending at many small bristles, is called a sarule.

Unlike members of the order Lyssacinosida, sceptrulophorans have dictyonal strands, meaning that their macroscleres (larger spicules) are fully fused together into a 3D framework. They can likewise be differentiated from the order Lychniscosida by the absence of octahedral frames (lychniscs) at the nodes of their macroscleres. Glass sponges with these two traits (dictyonal strands and a lack of lychniscs) have historically been placed in the order Hexactinosida (sometimes spelled Hexactinosa).