An exceedingly rarely reported and very exciting find!!! I do not see what else these beautiful myxos could be except Diderma rufostriatum, which have been recorded fewer than 30 times worldwide to date -- only in three countries in Western Europe and a single observation in western Australia (per GBIF). Microscopy will be done to confirm, but the descriptions in the literature are very clear and these fit the description perfectly as far as I can tell. And, to make this all the more amazing, these were all found in dry leaf litter and on tiny twigs in my very own front yard by my friend @graysquirrel !