Pennella cervicornis Heegaard, 1943

Not valid. Reported from Diodon sp. In the Bay of Bengal. The specimens described by Heegaard (1943) are similar to P. diodontis from the same host species in size, cephalothorax, neck, trunk and abdominal plume structure. Synonym of P. diodontis (Hogans 1988a). Accepted as P. diodontis (Walter & Boxshall 2015);