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- Title
A new genus and species of the family Pennellidae (Copepoda, Siphonostomatoida) infecting the Pacific viperfish Chauliodus macouni.
- Authors
Ohtsuka, Susumu; Lindsay, Dhugal J.; Izawa, Kunihiko
- Abstract
A new genus and species of pennellid copepod, Protosarcotretes nishikawain. g., n. sp., is described on the basis of an ovigerous female infecting a Pacific viperfish Chauliodus macouni collected from the deep-waters of Suruga Bay, Japan. The new genus exhibits the most plesiomorphic states in the first to fourth legs of pennellids, and is differentiated from two closely related pennellid genera Sarcotretes and Lernaeenicus by the morphology of the oral appendages. Two species of the genus Lernaeenicus are transferred to the new genus as Protosarcotretes multilobatus (Lewis, 1959) n. comb. and Protosarcotretes gnavus (Leigh-Sharpe, 1934) n. comb. The host specificity and life cycle of deep-sea pennellids are discussed. Sarcotretes scopeli Jungersen, 1911 and Cardiodectes bellottii (Richiardi, 1882) show low differentiated host-specificity, while P. nishikawai seems to be limited to the Stomiidae, which are rare hosts of pennellids, in contrast to the Myctophidae family. In the Pennellidae family, two patterns of the life cycle are found: with or without naupliar stages.
- Subjects
PENNELLIDAE; CHAULIODUS macouni; LANTERNFISHES; VESTIGIAL organs; FISH anatomy
- Publication
Parasite (1252607X), 2018, Vol 25, p1
- ISSN
1252-607X
- Publication type
Article
- DOI
10.1051/parasite/2018003