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Diplocirrus octobranchus (Hartman, 1965), comb. n. A holotype (LACM-AHF 540), dorsal view B same, anterior end, dorsal view C paratype (LACM-AHF 541), head, frontal view, palps and branchiae removed D same, chaetiger 18 E same, basal, medial and distal notochaetal regions F same, basal, medial and distal neurochaetal regions.
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Diplocirrus Haase, 1915, includes flabelligerids having cylindrical to club-shaped bodies, with cirriform papillae, multiarticulate chaetae in both parapodial rami, 8 branchial filaments of two types (thick and rarely lamellate, or cirriform), gonopodial lobes in chaetigers 5 or 6, or multiple gonopores along some anterior chaetigers. Bradiella Rul...
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... Flabelligerids are found from intertidal to abyssal depths worldwide but some genera (e.g., Ilyphagus) are restricted to abyssal depths. Approximately 20 flabelligerid species have been described or recorded from Australia (Haswell 1886(Haswell , 1892Day and Hutchings 1979;Salazar-Vallejo 2011a, b, 2012aSalazar-Vallejo and Buzhinskaja 2011). However, all these records are from shallow waters (< 40 m) except for Flabelligera affinis reported from deep sea (101-500 m) by Day and Hutchings (1979), and thus, flabelligerid fauna of deep Australian waters is unknown. ...
In Australia, the deep-water (bathyal and abyssal) benthic invertebrate fauna is poorly known in comparison with that of shallow (subtidal and shelf) habitats. Benthic fauna from the deep eastern Australian margin was sampled systematically for the first time during 2017 RV ‘Investigator’ voyage ‘Sampling the Abyss’. Box core, Brenke sledge, and beam trawl samples were collected at one-degree intervals from Tasmania, 42°S, to southern Queensland, 24°S, from 900 to 4800 m depth. Annelids collected were identified by taxonomic experts on individual families around the world. A complete list of all identified species is presented, accompanied with brief morphological diagnoses, taxonomic remarks, and colour images. A total of more than 6000 annelid specimens consisting of 50 families (47 Polychaeta, one Echiura, two Sipuncula) and 214 species were recovered. Twenty-seven species were given valid names, 45 were assigned the qualifier cf., 87 the qualifier sp., and 55 species were considered new to science. Geographical ranges of 16 morphospecies extended along the eastern Australian margin to the Great Australian Bight, South Australia; however, these ranges need to be confirmed with genetic data. This work providing critical baseline biodiversity data on an important group of benthic invertebrates from a virtually unknown region of the world’s ocean will act as a springboard for future taxonomic and biogeographic studies in the area.
... The genus Diplocirrus Haase, 1915 is a member of the Flabelligeridae, consisting of 16 named and three undescribed species (Salazar-Vallejo & Buzhinskaja 2011;Teixeira et al. 2015). The members of the genus can be found in muddy sand sediments from intertidal to deep sea environments around the world. ...
... The members of the genus can be found in muddy sand sediments from intertidal to deep sea environments around the world. Recently, Salazar-Vallejo & Buzhinskaja (2011) reviewed all species of the genus and synonymized Diversibranchius Buzhinskaja, 1994 andBradiella Rullier, 1965 with Diplocirrus. This genus is distinguished from other flabelligerids by the clavate or subcylindrical body, two types of branchiae, abundant body papillae, multiarticulated capillary notochaetae and neurochaetae, and presence of gonopodial lobes or gonopores (Salazar-Vallejo & Buzhinskaja 2011). ...
... Recently, Salazar-Vallejo & Buzhinskaja (2011) reviewed all species of the genus and synonymized Diversibranchius Buzhinskaja, 1994 andBradiella Rullier, 1965 with Diplocirrus. This genus is distinguished from other flabelligerids by the clavate or subcylindrical body, two types of branchiae, abundant body papillae, multiarticulated capillary notochaetae and neurochaetae, and presence of gonopodial lobes or gonopores (Salazar-Vallejo & Buzhinskaja 2011). ...
Seven new species of Diplocirrus are described from Japan: D. asamushiensis sp. nov., D. imajimai sp. nov., D. mamoi sp. nov., D. ohtsukai sp. nov., D. seisuiae sp. nov., D. tohokuensis sp. nov., and D. toyoshioae sp. nov. These species are distinguished from all the known species of Diplocirrus by the following features: length of the cephalic cage, length of lateral papillae, presence of gonopodial lobe, adhering pattern of sediment particles, length of caruncle, length and morphological feature of branchiae, articles and morphological features of neurochaetae, and swollen area along the body.
... Nine flabelligerid genera have been recorded from Japanese waters to date, i.e., Brada, Buskiella, Daylithos, Diplocirrus, Flabelligera, Pherusa, Piromis, Semiodera, and Stylarioides (Imajima 1964;Imajima 2006;2009;Imajima and Hartman 1964;Miura 2014;Salazar-Vallejo 2011a;Salazar-Vallejo 2011b;2012a, b;Salazar-Vallejo and Buzhinskaja 2011;Uchida 1992). However, Trophoniella was not recorded from Japan in previous studies. ...
Trophoniella hephaistos sp. n. was collected from a tank irrigated with seawater pumped directly from Nabeta Bay, Japan. This species is discriminated from other Trophoniella by having dorsal tubercles, a tongue-shaped branchial plate, a tunic covered with large sediment grains dorsally and ventrally, having eyes, and anchylosed neurohooks starting from chaetigers 17–20. This is the first record of Trophoniella from Japanese waters. Identification keys to species of Trophoniella and four gene sequences (COI, 16S, 18S, 28S) of this species are provided. Phylogenetic analysis was conducted to clarify phylogenetic position of Trophoniella in Flabelligeridae using four genes.
... The flabelligerid genus Diplocirrus Haase, 1915 is characterized by having a club-shaped body, two types of retractable branchiae, and multiarticulate chaetae in both parapodia rami. After the comprehensive taxonomic revision by Salazar-Vallejo and Buzhinskaja (2011), the two monotypic genera Bradiella Rullier, 1965 andDiversibranchius Buzhinskaja, 1994 were synonymized with Diplocirrus; consequently, the genus currently consists of 13 species, of which three are still undescribed (Salazar-Vallejo and Buzhinskaja 2011), that live on soft bottoms in sublittoral depths worldwide. ...
... The flabelligerid genus Diplocirrus Haase, 1915 is characterized by having a club-shaped body, two types of retractable branchiae, and multiarticulate chaetae in both parapodia rami. After the comprehensive taxonomic revision by Salazar-Vallejo and Buzhinskaja (2011), the two monotypic genera Bradiella Rullier, 1965 andDiversibranchius Buzhinskaja, 1994 were synonymized with Diplocirrus; consequently, the genus currently consists of 13 species, of which three are still undescribed (Salazar-Vallejo and Buzhinskaja 2011), that live on soft bottoms in sublittoral depths worldwide. ...
... Thereafter, an unidentified "Flabelligeridae from Japan" was illustrated in Rouse and Pleijel (2001), which was later identified as D. nicolaji by Salazar-Vallejo and Buzhinskaja (2011) on the basis of their reexamination of the photographed material of Rouse and Pleijel (2001) (Salazar-Vallejo, personal communication). However, neither Rouse and Pleijel (2001) nor Salazar-Vallejo and Buzhinskaja (2011) provided the precise collection sites of their material; no other record of this species has been reported from Japanese waters. Thus, the distribution of D. nicolaji in Japan needs to be clarified. ...
Diplocirrus nicolaji is a flabelligerid worm originally described from shallow waters of Peter the Great Bay, Sea of Japan. Later, this species was also recorded from Japan, but detailed data were not provided; thus the occurrence of D. nicolaji in Japan needs to be confirmed based upon additional material. The collection of 20 D. nicolaji individuals from four localities along Japanese coasts (the Sea of Japan and western Pacific Ocean), allowed us to
provide detailed morphological observations using stereoscopic and scanning electron microscopy. Partial
cytochrome c oxidase subunit I sequences were obtained for phylogenetic analysis. Although the morphological
analysis detected a few variations in palp length and body colour in ethanol among the local populations, the
phylogenetic analysis confirmed their conspecificity with little genetic divergence. This is the first report of D.
nicolaji from the western Pacific Ocean and extends its distribution southward.
... The genus is characterized by abundant clavate or subcylindrical (often anteriorly swollen) body papillae, all chaetae multiarticulated capillaries, thick neurochaetae, and sessile branchiae. Although both branchial and chaetal features are employed to distinguish flabelligerid genera, their delineation is sometimes unclear because branchial features are in the eversible anterior end, which is rarely exposed (Salazar-Vallejo & Buzhinskaja 2011). ...
... More recently, Diplocirrus sp. was reported by Bolívar (1990) and Machado et al. (2012) in Rio de Janeiro State. Salazar-Vallejo & Buzhinskaja (2011) revised all Diplocirrus species and regarded Bradiella Rullier, 1965 andDiversibranchius Buzhinskaja, 1993 as junior synonyms based on type and additional material. At that point, the genus Diplocirrus contained nine species and no species has been described from the Western South Atlantic. ...
. Currently, 16 species of Flabelligeridae have been recorded in Brazil, four in the genus Diplocirrus: D. glaucus Malmgren, 1867 from Ubatuba, D. capensis Day, 1961 from Santos (São Paulo State) and Diplocirrus sp. from off north of Rio de Janeiro. Diplocirrus glaucus australis Nonato, 1981 is considered a nomen nudum. In the present study, three new species are described: Diplocirrus rugosus sp. nov., Diplocirrus salazarvallejoi sp. nov. and Diplocirrus acafi sp. nov., all collected from soft bottoms off southeast Brazil. A key to all Diplocirrus species is provided.
... There are several species that have been previously placed in Ilyphagus but belong elsewhere. Thus, I. antarcticus Hartman, 1978, I. ilyvestis Hartman, 1960and I. minutus Amoureux, 1986belong in Bradabyssa, I. caudatus Rioja, 1963belongs in Therochaeta Chamberlin, 1919, and I. octobranchus Hartman, 1965belongs in Diplocirrus Haase, 1915 as emphasized elsewhere (Day 1973, Salazar-Vallejo et al. 2008, Salazar-Vallejo and Buzhinskaja 2011. Lastly, as indicated above, I. pluto Chamberlin, 1919 is not a polychaete but an holothurian. ...
Ilyphagus Chamberlin, 1919 includes abyssal, fragile benthic species. Most species have large cephalic cages but chaetae are brittle and easily lost which may explain why the original definition included species with a cephalic cage or without it. The type species, Ilyphagus bythincola Chamberlin, 1919, together with another species (Ilyphagus pluto Chamberlin, 1919) were described as lacking a cephalic cage whereas a third species (Ilyphagus ascendens Chamberlin, 1919) was described with one. To clarify this situation, all available type and non-type materials were studied. Ilyphagus is redefined to include species with digitiform bodies, abundant filiform papillae and a thin body wall; their neurochaetae are thick, anchylosed aristate spines, and all species have a cephalic cage (in the type species the presence of a cage is inferred from the remaining chaetal scars). Ilyphagus pluto, which also lacks a a cephalic cage is determined here to be a holothurian. The redefined genus contains Ilyphagus bythincola (incl. Ilyphagus ascendens), Ilyphagus coronatus Monro, 1939, Ilyphagus hirsutus Monro, 1937, and Ilyphagus wyvillei (McIntosh, 1885).
The Southern Ocean is widely recognized for its unique benthic ecosystems, but benthic sampling has been largely restricted to shallower continental zones and much remains to be learned about biodiversity in the bathyal and abyssal zones. In this study, we collected and investigated the deep-sea benthic habitat using geological dredges, a multiple corer, and a bait trap on-board the R/V Hakuho Maru in bathyal to abyssal depths between the latitude of 39°38.16′S–66°36.03′S and the longitude of 62°19.55′W–67°37.95′E in the Southern Ocean and the surrounding subantarctic region, focusing on West Antarctica. We carried out 20 geological dredges, 14 multiple corers, and a bait trap survey. Here, we present the taxonomic and distributional description of 180 species of Annelida, Mollusca, Ostracoda, Decapoda, and Echinodermata identified from our samples, including species-level identifications where possible and detailed occurrence information. Although West Antarctica is the most highly investigated area for benthic biodiversity around Antarctica, our collection includes the annelid Flabelligena hakuhoae Jimi et al. 2020 which was new to science at the time of collection, and other potentially undescribed species of Annelida, Ostracoda, Asteroidea, and Holothuroidea. Several specimens collected updated the distribution ranges of their species.
Non-indigenous species (NIS) represent one of the most relevant threats to biodiversity, ecosystem functioning and human activities, and their occurrence and spread have been the subject of numerous works and revisions. However, the information available is rather confused for several taxa, including polychaetes, which are characterised by having a high number of cryptogenic and questionable species. This work aims at providing a revised checklist of alien polychaetes occurring along the coasts of Italy, based on the examination of newly collected and deposited material and on the critical analysis of published and gray literature, and whenever possible on the re-examination of historical material. Of the 86 polychaete species reported as NIS in Italian waters, 25 are confirmed as alien species, while 3 are cryptogenic, and 40 should be considered questionable. Finally, 18 species were excluded from non-indigenous species checklists, either because they are native, or because they represent misidentifications of other species. The high number of cryptogenic and questionable species points at the need of molecular studies and taxonomic revisions for the majority of polychaete taxa reported as NIS, in order to clarify their taxonomy, origin, introduction pathways and spreading patterns.
Les zones côtières sont constituées de divers milieux : plages, estrans rocheux, estuaires, lagunes… favorisant une faune riche et diversifiée. Les études portant sur les Annélides Polychètes du Maroc, remontent au début du vingtième siècle lorsque 21 espè ces étaient identifiées dans la région de Tanger. Le matériel recueilli lors des campagnes océanographiques du "Vanneau" a constitué une importante contribution à la connaissance de la faune des Annélides Polychètes avec 226 espèces, 142 genres et 30 familles. Lors de la mission BIOMAR, 78 espèces de polychètes ont été récoltées dont 35 étaient nouvelles pour le Maroc et le nombre total des Annélides Polychète s du Maroc a été estimé à 333 espèces. La mise à jour de cet inventaire à travers la présente étude permet de dénombrer 321 espèces, 180 genres et 43 familles, car certaines sont désormais en synonymie. La faune annélidienne du Maroc est moins riche que celle de la Tunisie q ui compte 375 espèces et la faune des côtes françaises qui renferme 934 espèces incluant la Manche, l'Atlantique et la Méditerranée.
Abstract. The coastal zones are diversified with beaches, rocky shores, estuaries and lagoons. Studies on polychaete annelids in Morocco started at the beginning of the 20 th century with 21 species from the region of Tanger. The specimens collected during the oceanographic cruise of the "Vanneau" were an important contribution to the fauna of polychaete annelids with 226 species, 142 genera, and 30 families being identified. During the cruise Biomar, 78 species were sampled including 35 new species for Morocco and the total number of polychaete in Morocco was estimated to 333 species. The update of this inventory in this present study i s now 321 species, 180 genera and 43 families, with some species in synonymy. The polychaete fauna in Morocco is less rich than the fauna in Tunisia, which has 375 species, and the fauna of France, with 934 species including British Channel, Atlantic and Mediterranean Sea. Abstract: Annelida Polychaeta, Morocco, biogeography, systematics.
An annotated checklist of 1257 species (73 families) of Annelida from the South China Sea (SCS) is presented, including 289 species originally described from the region. The remaining extralimital records (968) are likely to represent a mixture of species complexes, misidentifications or truly widespread species, and therefore should be targets for future taxonomic study. The occurrence of each species within each of seven subregions is reported, with the majority (72%) of species only occurring in a single region. The annelid diversity of Singapore is estimated to be 121 species and 37 families. Families showing the highest levels of diversity in the SCS are the Nereididae (134 species), Syllidae (100), Polynoidae (76), Serpulidae (72), Spionidae (60), and Eunicidae (59). By comparison, both Nereididae and Syllidae are found to be more diverse in the SCS than the Australia region. For the Nereididae, this is likely to be the result of this group’s capacity to tolerate low salinities, which would give its members a selective advantage over other annelids in a region that experiences high freshwater input (river flow and precipitation). In the case of Syllidae, it may be the result of taxonomic bias. The SCS region is home to 19 species that are utilised directly by humans, either as bait, food for penaeid aquaculture or, in few cases, human consumption.
