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San Pedro, CA, United States

Burreson E.M.,Virginia Institute of Marine Science | Passarelli J.K.,Cabrillo Marine Aquarium
Comparative Parasitology | Year: 2015

Pontobdella californiana is described parasitizing California coastal water big skates, Raja binoculata, and thornback guitarfish, Platyrhinoidis triseriata. Leeches are large, up to 70 mm in total length. The oral sucker has 2 pairs of linear eyespots and 2 pairs of lateral papillae. The caudal sucker is small and terminal, with a diameter less than maximum body width. Annulus a2 has 4 large conical tubercles dorsally and 4 smaller conical tubercles ventrally. Annuli a1 and a3 have 4 small tubercles dorsally and ventrally and 2 small tubercles laterally for a total of 10 tubercles on each of these annuli. © 2015 The Helminthological Society of Washington. Source


Burreson E.M.,Virginia Institute of Marine Science | Passarelli J.K.,Cabrillo Marine Aquarium | Kim B.,University of California at Los Angeles
Journal of Parasitology | Year: 2012

Collections of giant kelpfish at inner Cabrillo Beach, San Pedro, California revealed the presence of an undescribed species of Heptacyclus, described here as Heptacyclus cabrilloi n. sp. The leech is small, only up to 14 mm total length including suckers; it has 2 pair of slightly crescentiform eyes on the oral sucker, 1 pair of punctiform ocelli on the second annulus of the trachelosome, 13 pairs of punctiform ocelli dorsally and ventrally on the urosome, and 14 marginal punctiform ocelli on the caudal sucker. Pigmentation is yellowish-tan with an unpigmented mid-dorsal stripe on both trachelosome and urosome, and with unpigmented halos around eyespots and urosome ocelli. Male reproductive system with 5 pairs of large, spherical testisacs. Mycetomes present, accessory gland cells on atrial cornu absent. Prevalence was 24.1 in June, 2011 with a range of 12 leeches per fish and 25.8 in October, 2011 with a range of 16 leeches per fish. © 2012 American Society of Parasitologists. Source


Burreson E.M.,Virginia Institute of Marine Science | Kim B.,University of California at Los Angeles | Passarelli J.K.,Cabrillo Marine Aquarium
Journal of Parasitology | Year: 2012

Mysidobdella californiensis n. sp. is described from the mysid Holmesimysis sculpta from Bodega Bay on the central California coast and from Holmesimysis costata var. from San Pedro on the southern California coast. The internal anatomy of M. californiensis is similar to that of the only other species in the genus, Mysidobdella borealis from the north Atlantic Ocean, except that M. californiensis lacks the medial, unpaired seminal receptacle present in M. borealis. Externally, M. californiensis is slightly larger and more robust than M. borealis, with a much larger caudal sucker. The most striking difference between the species is the unusually large, trumpet-shaped, fluted oral sucker in M. californiensis. At Bodega Bay, the prevalence of M. californiensis on its host was 17% with an average intensity of 1.46 (range 1-3) leeches per host. © 2012 American Society of Parasitologists. Source


A redescription of Acanthochondria cyclopsetta Pearse, 1952 (Copepoda; Chondracanthidae), hitherto reported only from the Mexican flounder, Cyclopsetta chittendeni Bean (Pleuronectiformes; Paralichthyidae), from Padre Island in the Gulf of Mexico, is presented based on female specimens from the spotfin flounder, Cyclopsetta fimbriata (Goode & Bean), collected off the coast of South Carolina, U.S.A. Furthermore, a description of the male of A. cyclopsetta is provided for the first time. Acanthochondria alleni n. sp. is also described based on specimens of both sexes collected from the fantail sole, Xystreurys liolepis Jordan & Gilbert (Pleuronectiformes: Paralichthyidae), caught in the Southern California Bight, U.S.A. These two species of Acanthochondria differ morphologically from their congeners by having a Type B-V antennule and elongate leg 2 rami (Type D), but can be distinguished from each other by differences in head shape, trunk shape, the relative size of the posterolateral processes of the trunk, the relative size of the abdominal somite, the insertion point of the caudal ramus, shape of the antennule tip, ornamentation of the antennal claw, ornamentation of the labrum, number of accessory teeth on the maxilliped claw, and ornamentation of legs 1 and 2 of the adult female. The taxonomic position of Acanthochondria zebriae Ho, Kim & Kumar, 2000 and A. bicornis Shiino, 1955 as well as the validity of the chondracanthid genus Pterochondria Ho, 1973 are also discussed. Copyright © 2010 · Magnolia Press. Source


Appy R.G.,Cabrillo Marine Aquarium | Butterworth E.W.,Ducks Unlimited Canada
Journal of Parasitology | Year: 2011

Experimentally transmitted Ascarophis sp. (Spirurida) developed to adult worms in the invertebrate host, Gammarus deubeni (Amphipoda), collected in the intertidal zone in Passamaquoddy Bay, New Brunswick, Canada. The morphological development and growth of larval stages is very similar to other cystidicolids, which are found as adults in fish. Unlike virtually all other Spirurida, which require a vertebrate definitive host, infective larvae of Ascarophis sp. migrate from the invertebrate host musculature into the hemocoel where they molt twice to become adults. Gravid females appear at 80 days and 69 days post-infection at 1012 C and 1820 C, respectively. While there is little evident host reaction to the parasite within the muscle tissue, within the hemocoel there is hemocytic reaction to shed nematode cuticles, released eggs, and sometimes the worm itself, including some melanization. The worms are morphologically similar to Ascarophis sp. from G. oceanicus in the Baltic and White seas and among Ascarophis species from fish is most similar to A. arctica. It is suggested that Ascarophis sp. no longer requires a vertebrate host and is transmitted between amphipods either through death and disintegration of infected amphipods and dispersal of the nematode eggs, or more likely through cannibalism or necrophagy. © 2011 American Society of Parasitologists. Source

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