Finally described by Adriana Reyes Gómez. This specimen is 7 mm in size.
I think this species shows up as S. petaloides in some sources (see the similarity with this species in the observation here- https://www.inaturalist.org/observations/8737884) but petaloides is a Hawaiian endemic.
Pelican Rock, Cabo, MX
Encontrado sobre la cedacera que se encuentra al rededor del barco hundido Princesa Vallarta