OntologiesxaoclassesXAO:0000448   
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gill primordium
http://purl.obolibrary.org/obo/XAO_0000448

A swelling from the 3rd visceral arch at NF stage 35 and 36, which co-occurs with a depression between the 3rd and 6th, forming the external gills by NF stage 39.

Also appears inxpo
Related Synonyms
external gill anlage
Broad Synonyms
gill