Rugogaster
Rugogastridae is a family of trematodes in the order Aspidogastrida. It consists of a single genus, Rugogaster Schell, 1973. Species Rugogaster callorhinci Amato & Pereira, 1995 Rugogaster hydrolagi Schell, 1973 Morphological characteristics Species of Rugogaster are parasitic in the rectal glands of various holocephalan fishes. They are characterized by a row of rugae, numerous testes, and two caeca, whilst other aspidogastrid species generally have one caecum and one or two testes. References Aspidogastrea Trematode families Trematodes parasiting fish