Loose is defined as the club segments not completely abutting one another, with the connecting margins not completely flush. The segments may be very loose (e.g. Rhagodera) to slightly loose (e.g. Coxelus). All taxa with a 1-segmented club were scored as "compact." Compact is defined as the club segments completely abut one another, the connecting margins being completely flush (e.g. Acolobicus). If one antennomere is distinctly smaller than the other but flush with the preceding (e.g. Endeitoma), this was scored as "compact."