sentences:  Species of "Triloculotrema" appear to be limited to deep-sea sharks, either triakids or squalids (possibly etmopterids).The blacktailed spurdog is also the host of external parasites such as the aegiid isopod "Aega angustata" on the skin.Internal parasites include several trypanorhynch cestodes in the spiral intestine, such as "Vittirhynchus squali" and "Gilquinia" sp.