1,721,048 research outputs found

    Description of Antho (Plocamia) bremecae sp. nov. and checklist of Microcionidae (Demospongiae: Poecilosclerida) from Burdwood Bank and neighboring areas, SW Atlantic Ocean

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    In this contribution, we describe a new Demospongiae species, Antho (Plocamia) bremecae sp. nov., from the west slope of Burdwood bank, a poorly studied region in the SW Atlantic Ocean. We also recorded for the first time in the region two other microcionid species, Clathria (Axosuberites) nidificata and Clathria (Microciona) antarctica. In addition, a regional checklist of Microcionidae from Burdwood Bank and neighboring areas, including Malvinas (Falkland) Islands, Tierra del Fuego Province and the North of the Scotia Arc (South Georgia and Shag Rocks) is provided.Fil: Schejter, Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Subsede Instituto Nacional de Investigación y Desarrollo Pesquero; ArgentinaFil: Bertolino, Marco. Universitá di Genova; ItaliaFil: Calcinai, Barbara. Universita Politecnica Delle Marche; Itali

    Patagonian scallop scientific name

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    Considerando las opciones taxonómicas actuales, se propone continuar utilizando el nombre científico Zygochlamys patagonica para la especie de interés comercial conocida vulgarmente como 'vieira patagónica.Considering the present taxonomic options, it is proposed to continue using the scientific name Zygochlamys patagonica for the commercial species commonly known as Patagonian scallop.Fil: Schejter, Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Subsede Instituto Nacional de Investigación y Desarrollo Pesquero; ArgentinaFil: Bremec, Claudia Silvia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Subsede Instituto Nacional de Investigación y Desarrollo Pesquero; Argentin

    Figure 4 in The hermit crab Sympagurus dimorphus (Anomura: Parapaguridae) at the edge of its range in the south-western Atlantic Ocean: population and morphometry features

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    Figure 4. Relative growth of the major cheliped propodus length (CHL) in relation to cephalothoracic shield length (CL) in males, female and juveniles (≤ 6 mm CL). Regression equations and coefficient of determination for a potential function are shown.Published as part of <i>Schejter, Laura & Mantelatto, Fernando L., 2015, The hermit crab Sympagurus dimorphus (Anomura: Parapaguridae) at the edge of its range in the south-western Atlantic Ocean: population and morphometry features, pp. 2055-2066 in Journal of Natural History 49 (33)</i> on page 2061, DOI: 10.1080/00222933.2015.1009406, <a href="http://zenodo.org/record/3999830">http://zenodo.org/record/3999830</a&gt

    Figure 1 in The hermit crab Sympagurus dimorphus (Anomura: Parapaguridae) at the edge of its range in the south-western Atlantic Ocean: population and morphometry features

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    Figure 1. Sympagurus dimorphus. Densities (number of individuals/100 m2) in the sampling areas from 2002 through 2006. Left column shows presence/absence data including all sampling sites, and right column shows densities on a relative scale.Published as part of <i>Schejter, Laura & Mantelatto, Fernando L., 2015, The hermit crab Sympagurus dimorphus (Anomura: Parapaguridae) at the edge of its range in the south-western Atlantic Ocean: population and morphometry features, pp. 2055-2066 in Journal of Natural History 49 (33)</i> on page 2057, DOI: 10.1080/00222933.2015.1009406, <a href="http://zenodo.org/record/3999830">http://zenodo.org/record/3999830</a&gt

    First record and range extension of the Antarctic coral Flabellum (Flabellum) impensum Squires, 1962 (Cnidaria: Scleractinia) in Argentinean coastal waters

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    The present paper reports the occurrence of the Antarctic coral Flabellum impensum in Tierra del Fuego Province, Argentina, and extends its distribution northwards in the south-west Atlantic Ocean. Nine individuals were found in Argentinean coastal waters in 2014, also representing one of the shallowest records of the species.Fil: Schejter, Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina. Instituto Nacional de Investigaciones y Desarrollo Pesquero; ArgentinaFil: Bremec, Claudia Silvia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentin

    Valvas de volútidos como sustrato de asentamiento y refugio en fondos blandos del Océano Atlántico Sudoccidental

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    In this contribution we highlighted the importance of the gastropod Adelomelon ancilla (living and empty shells) as settlement substrate for the sea anemones Antholoba achates and Isotealia antarctica in soft bottoms of the SW Atlantic Ocean. Fifty percent of the sampled shells of A. ancilla presented at least one epibiotic anemone and up to a maximum of 6 anemones were reported in one living individual. Adelomelon ancilla shells are the first settlement substrate reported for I. antarctica. We also recorded the use of empty shells by Pagurus comptus and Propagurus gaudichaudii, as far as the less frequent record of other invertebrates and gastropod egg cases attached to the empty shells. These results are compared with the epibiotic organisms recorded on Odontocymbiola magellanica, another volutid species that shares the same habitat.En este estudio se destaca la importancia del gasterópodo Adelomelon ancilla (organismos vivos y valvas vacías) como sustrato de asentamiento para las anémonas Antholoba achates e Isoteallia antarctica en fondos blandos del Océano Atlántico Sudoccidental. El cincuenta por ciento de las valvas analizadas presentó al menos una anémona epibionte y hasta un máximo de 6 anémonas fueron registradas en un individuo vivo de A. ancilla. Las valvas de A. ancilla serían el primer sustrato de asentamiento conocido utilizado por I. antarctica. También se registró el uso de valvas vacías por Pagurus comptus y Propagurus gaudichaudii, y se registraron otros invertebrados epibiontes menos frecuentes, así como el uso de estas valvas vacías para la deposición de cápsulas de huevos de varios gasterópodos. Estos resultados se comparan con los organismos epibiontes reportados sobre Odontocymbiola magellanica, otra especie de volútido que comparte el mismo hábitat.Fil: Schejter, Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; ArgentinaFil: Escolar, Mariana. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentin

    Haliclona (Gellius) rudis

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    <i>Haliclona (Gellius) rudis</i> (Topsent, 1901) <p>(Figure 11g –i)</p> <p> Restricted synonymy: <i>Gellius rudis</i> Topsent, 1901, <i>Haliclona rudis</i> (Topsent, 1901).</p> <p>Material examined: 1 specimen collected at station 5 (SOI; 61°25'S, 42°55'W; 589 m; 3/3/2014; MACN-In 44365; IEO-CSIC Col.).</p> <p>Description: Massive fragmented specimen, beige in colour, very porous (Figure 11g). Anisotropic skeleton with multispicular tracts. Spicules are oxeas of 450–620 µm by 12.5–20 µm and thin sigmas of 25–50 µm (Figure 11 h, i).</p> <p> Remarks: This is a frequently recorded species in Antarctica, previously found by Topsent (1917), Burton (1929), Koltun (1964), Campos <i>et al.</i> (2007), Göcke & Janussen (2013), among others. This is the first record for the SOI.</p>Published as part of <i>Schejter, Laura, Cristobo, Javier & Ríos, Pilar, 2024, New records of demosponges (Porifera) from the South Orkney Islands (Antarctica) with a checklist for the region, pp. 401-430 in Zootaxa 5403 (4)</i> on pages 421-422, DOI: 10.11646/zootaxa.5403.4.1, <a href="http://zenodo.org/record/10562154">http://zenodo.org/record/10562154</a&gt

    Record of stone coral Desmophyllum dianthus (Esper, 1794) (Scleractinia, Caryophylliidae) in areas of the shelf break front of the Argentine Sea

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    En esta nota se comunica el primer hallazgo del coral de piedra Desmophyllum dianthus (Esper 1794) (Cnidaria: Anthozoa: Scleractinida) en áreas de explotación de la vieira patagónica en el frente de talud del Mar Argentino. Este hallazgo representa, además, el primer registro de la especie en aguas de la plataforma continental argentina en 50 años y el de menor profundidad.In this note the first finding of stone coral Desmophyllum dianthus (Esper, 1794) (Cnidaria: Anthozoa: Scleractinia) in Patagonian scallop (Zygochlamys patagonica) fishing grounds in the shelf break front of the Argentine Sea is reported. The finding represents, besides, the first and shallowest record of the species in the Argentine Continental Shelf in 50 years.Fil: Schejter, Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; ArgentinaFil: Schwartz, Matías. Instituto Nacional de Investigaciones y Desarrollo Pesquero; ArgentinaFil: Bremec, Claudia Silvia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentin

    Coelosphaera (Coelosphaera) koltuni Schejter, Rios & Cristobo 2019

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    <i>Coelosphaera (Coelosphaera) koltuni</i> Schejter, Ríos & Cristobo, 2019 <p>(Fig. 4a)</p> <p> Material examined: 5 specimens collected at station 11 (SOI; 60°53'S, 42°35'W; 487 m; 10/3/2014; MACN-In 41376 and MACN-In 41377; IEO-CSIC Col.; see Schejter <i>et al.</i> 2019).</p> <p>Description: Globular sponge attached to hard substrate by a short and narrow peduncle. The peduncle can include small stones. Surface with hollow fistules (Figure 4a). Spicules are anisostrongyles with asymmetrically ends 850–1300 /33–38 μm, arcuate tridentate isochelae 25–35 μm and sigmas (S and C shaped) 35–55 μm.</p> <p> Remarks: See Schejter <i>et al.</i> (2019) for a complete characterization and discussion of this species.</p>Published as part of <i>Schejter, Laura, Cristobo, Javier & Ríos, Pilar, 2024, New records of demosponges (Porifera) from the South Orkney Islands (Antarctica) with a checklist for the region, pp. 401-430 in Zootaxa 5403 (4)</i> on page 409, DOI: 10.11646/zootaxa.5403.4.1, <a href="http://zenodo.org/record/10562154">http://zenodo.org/record/10562154</a&gt

    Inflatella belli

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    <i>Inflatella belli</i> (Kirkpatrick, 1907) <p>(Fig 4b, c)</p> <p> Restricted synonymy: <i>Joyeuxia belli</i> Kirkpatrick, 1907; <i>Inflatella fistulosa</i> Hentschel, 1914.</p> <p>Material examined: 1 specimen collected at station 10 (SOI; 60°59'S, 46°43'W; 307 m; 5/3/2014; MACN-In 44367; IEO-CSIC Col.).</p> <p>Description: Sponge pyriform, about 4 cm high, hollow body with tubular papillae. Smooth leathery surface, light brown in colour (Figure 4b). Macroscleres are slightly sinuous anisotornotes of 750–930 µm by 10–15µm (Figure 4c). No microscleres.</p> <p>Remarks: This species has been recorded from Antarctic waters by Koltun (1964) and more recently by Göcke & Janussen (2013), among others. It´s been recorded also in sub-Antarctic waters at Burdwood bank and Malvinas (Falkland) Islands by Burton (1934). This is a new record for the SOI.</p>Published as part of <i>Schejter, Laura, Cristobo, Javier & Ríos, Pilar, 2024, New records of demosponges (Porifera) from the South Orkney Islands (Antarctica) with a checklist for the region, pp. 401-430 in Zootaxa 5403 (4)</i> on pages 409-410, DOI: 10.11646/zootaxa.5403.4.1, <a href="http://zenodo.org/record/10562154">http://zenodo.org/record/10562154</a&gt
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