Hall Kathryn A. (1)*, Chambers Clinton B. (2)
- A new genus of the Gyliauchenidae Goto et Matsudaira, 1918 (Digenea) from Naso
tuberosus (Percomorpha, Acanthuridae) on the Great Barrier Reef, Queensland, Australia.
(1) Department of Microbiology and Parasitology, University of Queensland, Brisbane, 4072,
Queensland, Australia; (2) Parasitic Worms Division, Department of Zoology, The Natural
History Museum, Cromwell Road, London SW7 5BD, UK
*Author to whom correspondence should be addressed.
A new genus and species, Affecauda annulata, belonging to the Gyliauchenidae Goto et
Matsudaira, 1918 was found in the intestine of Naso tuberosus from Heron and Lizard
Islands on the Great Barrier Reef, Queensland, Australia. This is the first record of a gyliauchenid
from a species of Naso. We have placed Affecauda annulata within the
Gyliauchenidae based on the structure of its digestive tract and terminal genitalia. The unusual and
distinctive shape of the hindbody, which is elongate and curled, and the location of the excretory
vesicle and papilla, which is distinctly anterior to the ventral sucker, distinguish this genus from
other genera within the Gyliauchenidae.
KEY WORDS: Digenea, Gyliauchenidae, Affecauda annulata gen. n., sp. n., taxonomy,
Acanthuridae, Naso tuberosus, marine parasites
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