Sigmatocom(e)

In H.; a hexaster with sigmoidal, s‐shaped, or aspid‐like secondary rays (arranged in a single circle on each primary ray), which are similar in size to those of strobiloplumicome and plumicome, but unlike drepanocome and springohexaster which are noticeably larger (e.g., Lyssacinosida).

Called also lophocome or tylfloricome.

No photos included yet.