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      A new species of Herpyllobius Steenstrup and Lütken, 1861 (Copepoda: Cyclopoida) parasitic on Lamispina horsti (Haswell, 1892) (Annelida, Flabelligeridae) from Western Australia

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          Abstract

          Abstract Herpyllobiid copepods are highly transformed mesoparasites that infect marine benthic polychaete annelids. The genus Herpyllobius Steenstrup and Lütken, 1861, the most diverse in the family, was known to infect exclusively polychaetes of the family Polynoidae, but it was recently reported also on another family. Species of Herpyllobius have been reported mainly from cold latitudes including Arctic and Antarctic areas, except for two subtropical species. During the taxonomic examination of flabelligerid polychaetes collected from a Western Australian coral reef system, a mesoparasitic copepod was found infecting a specimen of Lamispina horsti (Haswell, 1892). The copepod represents an undescribed species of Herpyllobius. The new species, Herpyllobius paulayi n. sp. belongs to a group of congeneric species (Group III) lacking intergenital processes or sclerotized dots. It diverges from the other species in this group by its possession of a unique combination of characters: 1) a globose ectosoma with pilose surface; 2) elongate, thick cylindrical egg sacs with +10 egg rows; 3) endosoma discoid, short, with two lateral, asymmetrical flattened processes and a medial lobe; 4) it attaches to the host prostomium; and 5) it infects a non-polynoid subtropical polychaete species.

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          Revision of Pherusa Oken, 1807(Polychaeta: Flabelligeridae).

          Pherusa Oken, 1807 was the first genus of flabelligerids to be described and was regarded as having over 40 species. Following revision of all available material two morphological patterns are recognized: Pherusa is restricted to those species with eight branchial filaments of similar width, and anchylosed falcate neurohooks, shorter than body width. Species with the same number of branchial filaments but with neurochaetae mostly straight, distally foliose and often as long as body width are transferred to a new genus: Lamispina n. gen. Pherusa contains 14 species, including six newly described: P. plumosa (Müller, 1776), type-species, restricted, from Greenland, P. affinis (Leidy, 1855) from the NW Atlantic, P. andersonorum n. sp. from the NE Pacific (California), P. aspera (Stimpson, 1854) from the NW Atlantic, P. hobsonae n. sp. from the NE Pacific (Washington), P. incrustata Quatrefages, 1866, reinstated from the Mediterranean Sea, P. mikacae n. sp. from the Adriatic Sea, P. moorei n. sp. from the NW Pacific (Japan), P. neopapillata Hartman, 1961 from the NE Pacific (California), P. nipponica n. sp. from the NW Pacific (Japan), P. obscura Quatrefages, 1866 reinstated from the NE Atlantic (France), P. papillata (Johnson, 1901) from the NE Pacific (Washington), P. rullieri n. sp. from the Eastern tropical Atlantic (Benin), and Pherusa sibogae (Caullery, 1944) n. comb. from Western Timor, Indonesia. Lamispina n. gen. has 10 species with five newly described: L. schmidtii (Annenkova-Chlopina, 1924) n. comb., type-species from the Japan Sea (incl. P. negligens (Berkeley & Berkeley, 1950)), L. amoureuxi n. sp. from the NE Atlantic (off SW Ireland), L. carrerai n. sp. from the NE Pacific (Mexico), L. chilensis n. sp. from the SE Pacific (Chile), L. falcata (Støp-Bowitz, 1948) n. comb. from the Norwegian Sea, L. gymnopapillata (Hartmann-Schröder, 1965) n. comb. from the SE Pacific (Chile), L. horsti (Haswell, 1892) n. comb. from Southern Australia, L. keeli n. sp. from the Gulf of Mexico (Florida), L. kerguelarum (Grube, 1877) n. comb. from the Southern Indian Ocean (Kerguelen Islands), and L. milligani n. sp. from the NW Atlantic (Florida). Keys to identify these two genera and all species in each genus are also included. 
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            Südjapanische Anneliden, 1. (Amphinomea, Aphroditea, Lycoridea, Phyllodocea, Hesionea, Syllidea, Eunicea, Glycerea, Sternaspidea, Chaetopterea, Cirratulea, Amphictenea)

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              The anatomy of a parasitic copepod, Saccopsis steenstrupi n. sp

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                Author and article information

                Journal
                nau
                Nauplius
                Nauplius
                Sociedade Brasileira de Carcinologia (Botucatu, SP, Brazil )
                2358-2936
                2024
                : 32
                : e20240517
                Affiliations
                [1] Chetumal Quintana Roo orgnameEl Colegio de la Frontera Sur orgdiv1Departamento de Ecología y Sistemática Acuática Departamento de Ecología y Sistemática Acuática
                Article
                S0104-64972024000100204 S0104-6497(24)03200000204
                10.1590/2358-2936e20240517
                b4944edf-9f00-4916-98d0-47a87ad2af2d

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 23 May 2023
                : 07 December 2023
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 27, Pages: 0
                Product

                SciELO Brazil

                Categories
                Original Article

                reef systems,mesoparasitic copepods,Benthic polychaetes,taxonomy,symbiosis

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