Muricea plantaginea (= Muricea appressa), SBMNH 422909 (Ecuador) and SBMNH 422417 (Baja CA Sur). Image included for comparison between sclerites found in M. californica and those seen in M. plataginea [= M. appressa Breedy & Guzmán, 2016]. SEM image. A–F SBMNH 422909 (A–C); E–F Calycular/coenenchymal sclerites A Elongated, jagged spindles B Small torch-type C Rounded, stout torches D Shorter, jagged spindles (axial sheath) E Unilateral spinous spindle F A second unilateral spinous form tending to torch shape G–K SBMNH 422417 Calycular and coenenchymal sclerites G Fan-shaped sclerite H Large, truncated unilateral spinous spindles I Stout prickly spindle J Rounded, unilateral spinous type K Torch-types typical of M. californica. Compare sclerites A–F with those shown in Breedy and Guzmán 2016 (fig. 15, for M. plantaginea) and sclerites G–K with those shown in Breedy and Guzmán 2016 (fig. 21, for M. californica).