Errina argentina sp. nov., a new stylasterid (Hydrozoa: Stylasteridae) from Mar del Plata submarine canyon (Southwest Atlantic)

BERNAL, M. C.; CAIRNS, S. D.; PENCHASZADEH, P. E.; LAURETTA, D.

Marine Biodiversity

Springer

Año: 2019 vol. 49 p. 833 - 839

1867-1616

Errina is a cosmopolitan genus of arborescent stylasterids that includes, discounting Errina cyclopora incertae sedis, 26 recentspecies 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 submarinecanyon 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, andthe presence of numerous flush dactylopores. It differs from E. antarctica in coenosteum color, gastropore and dactylopore spinesize, and shape of flush dactylopores. This record provides an extension of the present known distribution of the genus Errina inthe SWA off Argentina.