21471 - NWA Unclassified Chondrite Meteorite H Type 26.2g Polished Section Megistaspidella triangularis filter-feeding appendage of Aegirocassis is

filter-feeding appendage of Aegirocassis is considerably more complex and sophisticated than that of Tamisiocaris and may herald a shift in the Early Ordovician to large-scale filter feeding in the oceans

His suture lines are wonderfully well detailed

Scanning electron microscopy (backscattered electron mode) images showing the abundance of albite plagioclase and the presence of euhedral amphibole crystals

Eurypholis

It is difficult to find better specimens than this one

21471 - NWA Unclassified Chondrite Meteorite H Type 26.2g Polished Section Megistaspidella triangularis filter-feeding appendage of Aegirocassis isThe authenticity of this specimen is guaranteed by the geologist Juan Avils Poblador, member of International Meteorite Collectors Association (IMCA 5681).