Pectinibranchia
plural noun
Pec·tini·bran·chia
ˌpektənəˈbraŋkēə,
pekˌtin-
: a large order of Gastropoda (subclass Streptoneura) comprising univalve mollusks that have a single kidney, have typically a single ctenidium which resembles a comb and is usually attached to the mantle throughout its length, and have a heart with only one auricle
Word History
Etymology
New Latin, from pectin- + -branchia