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1 April 2011 Two New Species of Cryptocephalum n. gen. (Monogenoidea: Dactylogyridae) from the Cephalic Lateral Line of Percichthys trucha (Perciformes: Percichthyidae) in Patagonia, Argentina
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Abstract

Two new species of Monogenoidea were found parasitizing the cephalic lateral line canals of Percichthys trucha (Valenciennes) (Perciformes: Percichthyidae). These species are described as members of a newly proposed genus of Dactylogyridae. Cryptocephalum n. gen. is characterized by the site of infection and the combination of the several features: ventral and dorsal anchor/bar complexes, anchors with strongly elongated shaft and recurved point, shaft and point of dorsal anchors protruding laterally from haptor, hooks with 2 subunits and with pair 5 smaller than the others; gonads overlapping; coiled male copulatory organ with counterclockwise rings, accessory piece formed by 2 distinct parts, and a tubular, sclerotized ventral vagina. Cryptocephalum petreum n. sp. is characterized by having both anchor pairs protruding laterally from haptor, male copulatory organ with a coil of 2-1/2 rings, accessory piece tweezers-shaped, and sclerotized vaginal vestibule. Cryptocephalum spiralis n. sp. has ventral anchors protruding ventrally and dorsal ones protruding laterally, male copulatory organ with a coil of 1-1/2 rings, the antero-dorsal part of the accessory piece saddle-shaped, vaginal vestibule not present, and coiled vagina. This is the first record of Dactylogyridae species parasitizing the cephalic lateral line of fishes.

Rocío M. Vega, Gustavo P. Viozzi, and Norma L. Brugni "Two New Species of Cryptocephalum n. gen. (Monogenoidea: Dactylogyridae) from the Cephalic Lateral Line of Percichthys trucha (Perciformes: Percichthyidae) in Patagonia, Argentina," Journal of Parasitology 97(2), (1 April 2011). https://doi.org/10.1645/GE-2627.1
Published: 1 April 2011
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