A new species of Polycirridae (Annelida: Terebellida) and three new reports for Cantabrian and Mediterranean Seas

[EN] Several polychaetes species from the central Cantabrian (NE Atlantic Ocean) and western Mediterranean Seas were studied. The Fabriciidae species Parafabricia mazzellae and Pseudofabricia aberrans are recorded for the first time in the western Mediterranean Sea and Novafabricia infratorquata in the northeast Atlantic Ocean (Cantabrian Sea). A new species of Polycirridae, Polycirrus asturiensis sp. nov., is described for the Cantabrian Sea; it is characterized by having two types of buccal tentacles, a transverse prostomium covering segment 1, a trilobed upper lip, notopodial lobes equally long, notochaetigerous segments with broadly >winged chaetae of different lengths and widths, up to segment 12, and type-1 neurochaetae beginning on segment 6. New habitat information for the fabricids Novafabricia infratorquata, Parafabricia mazzellae and Pseudofabricia aberrans is also provided.[FR] Une nouvelle espèce de Polycirridae (Annelida : Terebellida) et trois nouveaux signalements en Mer Cantabrique et en Méditerranée. Plusieurs espèces de polychètes appartenant aux familles Fabriciidae et Polycirridae ont été étudiées en Mer Cantabrique et en Méditerranée occidentale. Les espèces de la famille Fabriciidae, Parafabricia mazzellae et Pseudofabricia aberrans, sont signalées pour la première fois en Mer Méditerranée occidentale, ainsi que Novafabricia infratorquata en Mer Cantabrique, au nord-est de l’Océan Atlantique. Une nouvelle espèce de polycirridé, Polycirrus asturiensis sp. nov., est décrite en Mer Cantabrique. La nouvelle espèce est caractérisée par deux types de tentacules oraux, un prostomium transversal couvrant le premier segment du corps, une lèvre supérieure trilobée, les lobes du notopode de la même longueur, les segments avec notopodes portent des soies ailées de différentes longueurs et largeurs jusqu’au segment 12, et les neuropodes sont présents au segment 6 et portent des neurosoies de type 1. De nouvelles informations sur l’habitat des espèces Novafabricia infratorquata, Parafabricia mazzellae et Pseudofabricia aberrans sont fournies.This study was partially financed by the project CTM2014-57949-R founded by the Plan for Science and Technology of the Ministry of Science and Education to the Museo Nacional de Ciencias Naturales of the Agencia Estatal Consejo Superior de Investigaciones CientíficasPeer Reviewe

Comparative phylogeography of two symbiotic dorvilleid polychaetes (Iphitime cuenoti and Ophryotrocha mediterranea) with contrasting host and bathymetric patterns

22 páginas, 9 tablas, 6 figuras.Two symbiotic polychaetes living in brachyuran crabs in the western Mediterranean and the nearby eastern Atlantic, Iphitime cuenoti and Ophryotrocha mediterranea, were analysed to determine their phylogeographical patterns and the possible effects of known oceanographic barriers in the study area. The analysed species live in hosts inhabiting well-differentiated depths, a factor that may be crucial for understanding the different patterns observed in each species. Iphitime cuenoti was found in four different host crabs between 100 and 600 m depth and showed some level of genetic homogeneity, reflected in a star-like haplotype network. Furthermore, barrier effects were not observed. By contrast, O. mediterranea was exclusively found in a single host crab species living between 600 and 1200 m depth. Phylogeographical analyses showed two lineages that pre-date the existence of current barriers. The geological history of the study area, including the most recent glaciation events, probably led to a secondary contact between the lineages, thus forming a single metapopulation. The phylogeographical pattern found in each species may be explained by differences in dispersal ability, habitat, and host crab specificity that have led them to be differentially affected by historical events. This study is the first to use a phylogeographical approach on symbiotic polychaetes.This paper has been supported by the projects CTM2010-22218, CGL2011- 23306, and CTM2013-43287-P, funded by the Spanish State Research Plan, and the Consolidated Research Group on Marine Benthic Ecology of the Generalitat de Catalunya (2014SGR120).Peer reviewe

Comparative phylogeography of two symbiotic dorvilleid polychaetes with contrasting host-crab and bathymetric patterns

Presentación para el 8th Congress of the International Symbiosis Society, {Symbiotic Lifestyle}, 12-18 July 2015, Lisboa.-- 127 pagesPeer Reviewe

Clonal chromosomal mosaicism and loss of chromosome Y in elderly men increase vulnerability for SARS-CoV-2

The pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2, COVID-19) had an estimated overall case fatality ratio of 1.38% (pre-vaccination), being 53% higher in males and increasing exponentially with age. Among 9578 individuals diagnosed with COVID-19 in the SCOURGE study, we found 133 cases (1.42%) with detectable clonal mosaicism for chromosome alterations (mCA) and 226 males (5.08%) with acquired loss of chromosome Y (LOY). Individuals with clonal mosaic events (mCA and/or LOY) showed a 54% increase in the risk of COVID-19 lethality. LOY is associated with transcriptomic biomarkers of immune dysfunction, pro-coagulation activity and cardiovascular risk. Interferon-induced genes involved in the initial immune response to SARS-CoV-2 are also down-regulated in LOY. Thus, mCA and LOY underlie at least part of the sex-biased severity and mortality of COVID-19 in aging patients. Given its potential therapeutic and prognostic relevance, evaluation of clonal mosaicism should be implemented as biomarker of COVID-19 severity in elderly people. Among 9578 individuals diagnosed with COVID-19 in the SCOURGE study, individuals with clonal mosaic events (clonal mosaicism for chromosome alterations and/or loss of chromosome Y) showed an increased risk of COVID-19 lethality

A taxonomic revision of the genus Haplosyllis Langerhans, 1887

41 páginas.The genus Haplosyllis Langerhans, 1887 is revised based on available types and newly collected specimens. 19 species are considered as valid, five as incertae sedis and four are referred to nomina dubia. Trypanoseta (Imajima, 1966) is synonymised with Haplosyllis, as the presence of trepan is considered a non-robust taxonomic feature, affecting H. ohma new comb. (Imajima & Hartman, 1964) and H. granulosa new comb. (Lattig, San Martín & Martín, 2007). Haplosyllis streptocephala (Grube, 1857) is a new combination and two species are considered to belong to Alcyonosyllis Glasby & Watson, 2001: A. bisetosa new comb. (Hartmann-Schröder, 1960) and A. gorgoniacola new comb. (Sun & Yang, 2004). All valid species are described and figured except those described during the last decade, which only includes diagnoses and chaetae illustrations. A dichotomous key to all valid species of Haplosyllis is provided.Peer reviewe

Two new endosymbiotic species of Haplosyllis (Polychaeta: Syllidae) from the Indian Ocean and Red Sea, with new data on H. djiboutiensis from the Persian Gulf

Previous knowledge on Haplosyllis species from the northernmost regions of the Indian Ocean (including the Red Sea) is confusing, with H. djiboutiensis as the only species originally described in the area. This species was later synonymised with H. spongicola, which in turn was widely reported all along the region. Among these reports, two referred to populations associated to the sponges Theonella swinhoei Gray, 1868 and Liosina paradoxa Thielle, 1899, from the Red Sea and the Indian Ocean, which proved to have enough marked morphological differences not only to be distinguished from each other, but also from H. spongicola and H. djiboutiensis. Accordingly, these specimens are herein illustrated, compared and described as new species. Haplosyllis eldagainoae sp. nov. is distinguished by a broad aciculae, short and curved chaetal mid-joining point and last article of dorsal cirri very long. Haplosyllis giuseppemagninoi sp. nov. resembles H. djiboutiensis in chaetal shape and body size (small), but may be differentiated by its broad aciculae and the presence of single chaetae on mid-body parapodia. Finally, the description of H. djiboutiensis is complemented with new data on its intra-specific chaetal variability, reproduction and ecology, and the Persian Gulf specimens are compared with those from nearby areas.Peer reviewe

MORPHOLOGICAL VARIABILITY OF THE HAPLOSYLLIS (SYLLIDAE: POLYCAHETA) SPECIES-COMPLEX IN AUSTRALIAN SEAS

Poster presentado en la IX International Polychaete Conference, Portland, Maine (USA) 2007The species of the Haplosyllis spongicola (Grube 1855) complex have been a topic of research during the last years, due to the high variability of their morphological characters and the high number of non-described species. In the first contribution of this worldwide taxonomic revision, Martin et al. (2003) studied 28 populations around the world with morphometric and classic morphological approaches, revealing the existence of a pseudo-sibling species-complex. Since then, two new species have been described, Haplosyllis crassicirrata from Japan (Aguado et al., 2006) and H. loboi from Argentina (Paola et al. 2006), and the type species, H. spongicola, has been re-described and distinguished from other two new species, H. carmenbritoae from Canary Islands and Geminosyllis granulosa from the Mediterranean sea (Lattig et al., 2007). In the present study, a great number of Haplosyllis from Australia have been examined and identified. Nine morphotypes have been found, of which seven will be formally described as new species, this being the first review of this sponge-symbiotic genus in Australian waters