calcivertellinae calcivertellinae calcivertellinae is a subfamily of foraminifera belonging to the order miliolida. calcivertellids have been found in pennsylvanian to triassic beds and had a cosmopolitan distribution. calcivertellinae scientific classification domain: eukaryota clade: diaphoretickes clade: sar phylum: retaria infraphylum: foraminifera class: tubothalamea order: miliolida family: †cornuspiridae subfamily: †calcivertellinaeloeblich and tappan 1964 genus apterrinellacarixiaplummerinellaramovsia the calcivertellids are characterized by a porcelain-like test consisting of a single tube, initially forming a spiral but opening out into a zigzag shape. they live attached to a surface or to other organisms.