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Description of Naobranchia Denticis N. Sp. (Copepoda, Siphonostomatoida, Lernaeopodidae) Parasitic on Dentex Hypselosomus (Teleostei, Sparidae) from Japanese Waters, with a Key to the Species of Naobranchia

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[The adult female of Naobranchia denticis n. sp. is described based on material collected from the gill filaments of the yellowback seabream Dentex hypselosomus caught in the southern Sea of Japan off the northern coast of Kyushu. Characteristic features of the new species include a cephalothorax three times as long as the trunk, a trunk as wide as long, egg-sacs situated posterolateral to the trunk, without extending to the bases of the maxillae anteriorly, slightly inclined toward each other posteriorly, with three pairs of reinforcement ribbons; caudal rami longer than abdomen and digitiform; head with lateral adhesive lobes and 12 hyaline papillae. The male has not been found. Our finding represents the first report of Naobranchia species from Japanese sparid hosts and the fourth report of this genus from the coastal waters of Japan. A key to the 21 species of Naobranchia is also included herein. Three species (N. bellones, N. pomolobi, and an unspecified species of Naobranchia from Hawaii) are not considered members of this genus because they lack the ribbonlike maxillae. La hembra adulta de Naobranchia denticis n. sp. es descrita basado en el material obtenido de los filamentos branquiales de la dorada de espalda amarilla Dentex hypselosomus capturado en el sur del Mar de Japón frente a la costa norte de Kyushu. Los rasgos característicos de la nueva especie incluyen el cefalotórax tres veces más largo que el tronco, un tronco tan ancho como largo, los ovisacos situados posterolateralmente al tronco, sin extenderse a las bases de los maxilares anteriormente, ligeramente inclinados el uno al otro en la región posterior, con tres pares de cintas de refuerzo; ramas caudales más largas que el abdomen y digitiformes; cabeza con lóbulos adhesivos laterales y 12 papilas hialinas. El macho no ha sido encontrado. Nuestro hallazgo representa el primer informe de especies de Naobranchia en hospedadores espáridos japoneses y el cuarto informe de este género en las aguas costeras de Japón. Una clave de las 21 especies de Naobranchia también se ha incluido en este documento. Tres especies (N. bellones, N. pomolobi, y una especie no especificada de Naobranchia de Hawai) no se consideran miembros de este género porque carecen de los maxilares con forma de cinta., The adult female of Naobranchia denticis n. sp. is described based on material collected from the gill filaments of the yellowback seabream Dentex hypselosomus caught in the southern Sea of Japan off the northern coast of Kyushu. Characteristic features of the new species include a cephalothorax three times as long as the trunk, a trunk as wide as long, egg-sacs situated posterolateral to the trunk, without extending to the bases of the maxillae anteriorly, slightly inclined toward each other posteriorly, with three pairs of reinforcement ribbons; caudal rami longer than abdomen and digitiform; head with lateral adhesive lobes and 12 hyaline papillae. The male has not been found. Our finding represents the first report of Naobranchia species from Japanese sparid hosts and the fourth report of this genus from the coastal waters of Japan. A key to the 21 species of Naobranchia is also included herein. Three species (N. bellones, N. pomolobi, and an unspecified species of Naobranchia from Hawaii) are not considered members of this genus because they lack the ribbonlike maxillae. La hembra adulta de Naobranchia denticis n. sp. es descrita basado en el material obtenido de los filamentos branquiales de la dorada de espalda amarilla Dentex hypselosomus capturado en el sur del Mar de Japón frente a la costa norte de Kyushu. Los rasgos característicos de la nueva especie incluyen el cefalotórax tres veces más largo que el tronco, un tronco tan ancho como largo, los ovisacos situados posterolateralmente al tronco, sin extenderse a las bases de los maxilares anteriormente, ligeramente inclinados el uno al otro en la región posterior, con tres pares de cintas de refuerzo; ramas caudales más largas que el abdomen y digitiformes; cabeza con lóbulos adhesivos laterales y 12 papilas hialinas. El macho no ha sido encontrado. Nuestro hallazgo representa el primer informe de especies de Naobranchia en hospedadores espáridos japoneses y el cuarto informe de este género en las aguas costeras de Japón. Una clave de las 21 especies de Naobranchia también se ha incluido en este documento. Tres especies (N. bellones, N. pomolobi, y una especie no especificada de Naobranchia de Hawai) no se consideran miembros de este género porque carecen de los maxilares con forma de cinta.]

Affiliations: 1: Graduate School of Biosphere Science, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8528, Japan;, Email: ionemadinabeitia@gmail.com; 2: Graduate School of Biosphere Science, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8528, Japan;, Email: ornatus@hiroshima-u.ac.jp

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/content/journals/10.1163/001121611x557055
2011-04-01
2016-07-25

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