Identificaciones de aaronbaldwin

from Hungry Point, exposed during an extreme minus tide, fresh dead but eroded. Aaron Baldwin had first suggested this is the low flat ecomorph of Lottia pelta from SE Alaska, based in part on some riblets that are still evident despite the dorsal erosion. Shell is about 37mm.

After side profile shots were added, the consensus is it is L. scutum.

The rare new species of the Ophioglossolambis digitata complex, Ophioglossolambis itsumiae Lum, 2021. Endemic to the Mascarene Basin and nearby islands, dead collected on coral reefs at 15-20m deep by local fishermen, 1987. Ex collection Peter Ignoti

I call this my "mystery trophon" - I see them reasonably often in the low intertidal, with quite eroded and highly sculptured shells, about 4 cm long. Can't figure out what they are, though. Poking around at a -5.3 tide -- first big low tide of the spring.

I have posted several similar trophons of the low intertidal, with several different IDs, and have yet to be convinced they are different species, or that any of those 3 IDs is correct. https://www.inaturalist.org/observations/6019253
https://www.inaturalist.org/observations/4072603
https://www.inaturalist.org/observations/4125626