One member of this phylum was the first organism to have its (*) genetic code completely sequenced, and another member is named due to where it resides in its host animals, notably dogs.
The genus Baylisascarius (BAY-liss-ass-CARE-ee-us) contains a parasitic member of this phylum. Another member of this phylum was studied as a model organism by Sydney Brenner. Members of this phylum possess sensory structures called phasmids and, like rotifers, have internal body cavities called pseudocoels. One member of this phylum was the first organism to have its (*) genetic code completely sequenced, and another member is named due to where it resides in its host animals, notably dogs. For 10 points, name this phylum which includes C. elegans, pinworms, heartworms and other roundworms.
The genus Baylisascarius (BAY-liss-ass-CARE-ee-us) contains a parasitic member of this phylum.
{Nematoda} [or {nematodes;} prompt on roundworms before mentioned]