Philometra priacanthi is a species of parasitic nematode of fishes. Its name is derived from its host species, Priacanthus hamrur. It possesses dorsal lamella-like structures on the distal part of its gubernaculum, which can also be found on other of its cogenerates. The only species with a dorsal protuberance near the gubernaculum's end is P. priacanthi, however. P. lateolabracis can be distinguished from the former by the lateral caudal mounds separated dorsally, narrower lamella-like structures on its gubernaculum, shorter spicules, and by the testis extending anteriorly. Other gonad-infecting species differ from this one by possessing a smooth gubernaculum, and their spicules being of different lengths. Seven gonad-infecting species of Philometra can be distinguished from P. priacanthi by their host types, as well as by geographical distribution.
Ascarophis is a genus of parasitic nematodes, belonging to the family Cystidicolidae. Species of Ascarophis are parasitic as adults in the gastrointestinal tract of marine and estuarine fishes.
Loricariichthys brunneus, commonly called Alcalde, Paleta or Tabla is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Orinoco basin in Guyana and Venezuela. The species is believed to be a facultative air-breather. A species of parasitic nematode in the family Guyanemidae, Guyanema longispiculum, was described in 1996 from the abdominal cavity of L. brunneus specimens.
