Pennellidae is a family of parasitic copepods. When anchored on a host, they have a portion of the body on the outside of the host, whereas the remaining anterior part of the parasite is hidden inside tissues of the host. Genera There are 24 genera: Allotrifur Yamaguti, 1963 Cardiodectes C. B. Wilson, 1917 Creopelates Shiino, 1958 Exopenna Boxshall, 1986 Haemobaphes Steenstrup & Lutken, 1861 Impexus Kabata, 1972 Lernaeenicus C. B. Wilson, 1932 Lernaeocera Blainville, 1822 Lernaeolophus Heller, 1865 Metapeniculus Castro-Romero & Baeza-Kurok, 1985 Nagasawanus Uyeno, 2015 Ophiolernaea Shiino, 1958 Parinia Kazachenko & Avdeev, 1977 Peniculisa C. B. Wilson, 1917 Peniculus von Nordmann, 1832 Pennella Oken, 1816 Peroderma Heller, 1865 Phrixocephalus C. B. Wilson, 1908 Propeniculus Castro Romero, 2014 Protosarcotretes Ohtsuka, Lindsay & Izawa, 2018 Pseudopeniculus Castro Romero, 2014 Sarcotretes Jungersen, 1911 Serpentisaccus Blasiola, 1979 Trifur C. B. Wilson, 1917 References Siphonostomatoida Crustacean families Taxa named by Hermann Burmeister