Abstract
Errina is a cosmopolitan genus of arborescent stylasterids that includes, discounting Errina cyclopora incertae sedis, 26 recent species and one extinct species. So far, only one species has been described from the Southwest Atlantic (SWA) off Argentina, Errina antarctica. Here, we describe a new species from that region, Errina argentina, collected in the Mar del Plata submarine canyon at 1398m depth. The new species is most similar to Errina kerguelensis in general growth form, arrangement of pores, and coenosteal texture, but differs in coenosteal strip width, gastrostyle and gastropore tube morphology, ampullae position, and the presence of numerous flush dactylopores. It differs from E. antarctica in coenosteum color, gastropore and dactylopore spine size, and shape of flush dactylopores. This record provides an extension of the present known distribution of the genus Errina in the SWA off Argentina.
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Acknowledgements
Many thanks to the crew of the O/V Puerto Deseado for their assistance and to Bert Hoeksema and the reviewers of this paper for their suggestions.
Funding
This work was supported by PICT 2013-2504 grants to Dr. Pablo Penchaszadeh, a PADI Foundation grant to Dr. Daniel Lauretta, and a PADI Foundation grant to Carolina Bernal.
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Communicated by B. W. Hoeksema
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Bernal, M.C., Cairns, S.D., Penchaszadeh, P.E. et al. Errina argentina sp. nov., a new stylasterid (Hydrozoa: Stylasteridae) from Mar del Plata submarine canyon (Southwest Atlantic). Mar Biodiv 49, 833–839 (2019). https://doi.org/10.1007/s12526-018-0861-1
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DOI: https://doi.org/10.1007/s12526-018-0861-1