Below are the words that matched your query...
Genus Sagitta
- chief genus of Chaetognatha including the largest arrowworms
Genus Spadella
- marine worms resembling the sagittas but with a broader body and only one pair of lateral fins
Genus Schistosoma
- type genus of the family Schistosomatidae: blood flukes
Genus Taenia
- type genus of the family Taeniidae: tapeworms
Genus Ascaris
- type genus of the family Ascaridae: roundworms with a three-lipped mouth