Aspidogastrea
plural noun
As·pi·do·gas·trea
| \ -ˈgastrēə\
Definition of Aspidogastrea
: a small subclass of Trematoda comprising flukes with large complex ventral sucking disks that are intermediate in some respects between monogenetic and digenetic trematodes and are internal or external parasites of aquatic animals, sometimes having alternation of hosts though completely lacking sexual reproduction
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