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Spirorbis (Paralaeospira) patagonicus Caullery & Mesnil 1897

Body symmetry

Namigai et al 2014
bilaterally symmetric
URI: http://purl.obolibrary.org/obo/PATO_0001324

Definition: being symmetric about a plane running from frontal end to caudal end (head to tail), and having nearly identical right and left halves

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appendages

Pettibone 1982
biramous parapodia
URI: https://eol.org/schema/terms/biramous_parapodia

Definition: parapodia (paired fleshy lateral processes) that end in two branches

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body shape

Pettibone 1982
vermiform
URI: https://www.wikidata.org/entity/Q7921571

Definition: shaped like a worm

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