Early- and middle-stage copepodids of Anthosoma crassum (Dichelesthiidae: Siphonostomatoida) and lesions associated with A. crassum infections are described from samples collected from the jaws of shortfin makos captured off southern California. The copepodids did not possess frontal filaments or frontal organs, and they resided in a headstandlike position firmly attached by their embedded antennae. Copepod larvae and small adults were lodged in shallow mucosal ulcers that basally exhibited mild, acute granulocytic stomatitis; large adults were lodged in deep tunnels encompassing the anterior aspects of their bodies. Some lesions contained more than 1 copepod. Examinations of lesions revealed that A. crassum infection of shortfin makos can result in severe subacute, necrotizing stomatitis with hemorrhage, granulation tissue, and lymphocytic aggregations in the mucosa, and reactive lymphocytic infiltration of the submucosal skeletal muscle. Copepod gut contents consisted of shark erythrocytes, hemosiderin granules, and necrotic host cells. These observations, along with reports of sharks heavily infected with A. crassum, suggest that this copepod may sometimes play a role in the morbidity and mortality of sharks that it infects.
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February 2002
ECTOPARASITOLOGY|
February 01 2002
FIRST DESCRIPTIONS OF EARLY- AND MIDDLE-STAGE COPEPODIDS OF ANTHOSOMA CRASSUM (DICHELESTHIIDAE: SIPHONOSTOMATOIDA) AND LESIONS ON SHORTFIN MAKOS (ISURUS OXYRINCHUS) INFECTED WITH A. CRASSUM
George W. Benz;
George W. Benz
Tennessee Aquarium and Southeast Aquatic Research Institute, One Broad Street, P.O. Box 11048, Chattanooga, Tennessee 37401-2048. GWB@tennis.org
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Joanna D. Borucinska;
Joanna D. Borucinska
Tennessee Aquarium and Southeast Aquatic Research Institute, One Broad Street, P.O. Box 11048, Chattanooga, Tennessee 37401-2048. GWB@tennis.org
* Department of Biology, University of Hartford, 200 Bloomfield Avenue, West Hartford, Connecticut 06117-1559.
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Scott A. Greenwald
Scott A. Greenwald
Tennessee Aquarium and Southeast Aquatic Research Institute, One Broad Street, P.O. Box 11048, Chattanooga, Tennessee 37401-2048. GWB@tennis.org
† Monterey Bay Aquarium, 886 Cannery Row, Monterey, California 93940-1085.
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J Parasitol (2002) 88 (1): 19–26.
Citation
George W. Benz, Joanna D. Borucinska, Scott A. Greenwald; FIRST DESCRIPTIONS OF EARLY- AND MIDDLE-STAGE COPEPODIDS OF ANTHOSOMA CRASSUM (DICHELESTHIIDAE: SIPHONOSTOMATOIDA) AND LESIONS ON SHORTFIN MAKOS (ISURUS OXYRINCHUS) INFECTED WITH A. CRASSUM. J Parasitol 1 February 2002; 88 (1): 19–26. doi: https://doi.org/10.1645/0022-3395(2002)088[0019:FDOEAM]2.0.CO;2
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