Editing Toxocariasis (section)

===Morphology===
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Both species produce eggs that are brown and pitted.<ref name="merckvetmanual" /><ref name="Harris Linton"/><ref name="Soskolne"/> ''T. canis'' eggs measure 75-90&nbsp;µm and are spherical in shape, whereas the eggs of ''T. cati'' are 65-70&nbsp;µm in diameter and oblong.<ref name="Markell_2006"/><ref name="Harris Linton"/><ref name="Soskolne"/> Second stage larvae hatch from these eggs and are approximately 0.5mm long and 0.02mm wide.<ref name="Huh, Sun, Sooung"/> Adults of both species have complete digestive systems and three lips, each composed of a dentigerous ridge.<ref name="Harris Linton"/><ref name="Soskolne"/>

Adult ''T. canis'' are found only within dogs and foxes and the males are 4–6&nbsp;cm in length, with a curved posterior end.<ref name="Despommier"/><ref name="Harris Linton"/> The males each have spicules and one “tubular testis.”<ref name="Harris Linton"/> Females can be as long as 15&nbsp;cm, with the vulva stretching one third of their bodylength.<ref name="Harris Linton"/> The females do not curve at the posterior end.<ref name="Despommier"/><ref name="Harris Linton"/>

''T. cati'' adult females are approximately 10&nbsp;cm long, while males are typically 6&nbsp;cm or less.  The ''T. cati'' adults only occur within cats, and male ''T. cati'' are curved at the posterior end.<ref name="Soskolne"/>