Belongs within: Arthropoda. The Leanchoiliida are a group of Cambrian ‘great-appendage’ arthropods that bore elongate flagella on the podomeres of the great appendage. Synapomorphies (from Cotton & Braddy 2004): Head with four segments; distal spines on terminal podomeres of endopods of second segment appendages longer than entire podomere series, terminating in annulate flagellae. <==Leanchoiliida [Alalcomenaeidea,… Continue reading Leanchoiliida