Assertion: mayfly's gill | /r/AtLocation | the bases of the maxillae
Facets:
value: in a very few species
type: OTHER
Source sentences:
text: In most taxa up to seven pairs of gills arise from the top or sides of the abdomen, but in some species they are under the abdomen, and in a very few species the gills are instead located on the coxae of the legs, or the bases of the maxillae.