Abstract
Twenty-three species of benthic hydroids, belonging to eight families and 13 genera, were found in a hydroid collection from Peter I Island, collected during both the Bentart 2003 and Bentart 2006 Spanish expeditions with BIO Hespérides in 2003 and 2006. Fourteen out of the 23 species constitute new records for Peter I Island, raising the total number of known species in the area to 30, as also do seven out of the 13 genera. The majority of the species are members of the subclass Leptothecata; the subclass Anthoathecata being scarcely represented. Sertulariidae is the family with the greatest number of species in the collection, with eight species (35%), followed by Lafoeidae with five (22%). Symplectoscyphus with four species (17%) and both Antarctoscyphus and Halecium with three (13%), including H. frigidum sp. nov., were the most diverse genera. Twenty species (ca. 77%) are endemic to Antarctic waters, either with a circum-Antarctic (11 species, ca. 42%) or West Antarctic (9 species, ca. 35%) distribution. Twenty-four (ca. 92%) are restricted to Antarctic or Antarctic/sub-Antarctic waters; only two species have a wider distribution. Peter I Island hydroid fauna is composed of typical representatives of the Antarctic benthic hydroid fauna, though it is characterized by the low representation of some of the most diverse and widespread Antarctic genera (Schizotricha and Staurotheca).
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Acknowledgments
I wish to thank Dr. José Luis Sanz Alonso from the Instituto Español de Oceanografía for his help in the elaboration of Fig. 1. Bentart 2003 and Bentart 2006 campaigns were funded, respectively, by the Ministerio de Educación y Ciencia (Ref. REN2001-1074/ANT) and the Ministerio de Ciencia y Tecnología (Ref. CGl2004-01856) of Spain. This study was developed thanks to a research project (Ref. CTM2009-11128ANT) funded by the Ministerio de Ciencia e Innovación of Spain and the Fondo Europeo de Desa-rrollo Regional (FEDER).
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Peña Cantero, Á.L. Benthic hydroids (Cnidaria: Hydrozoa) from Peter I Island (Southern Ocean, Antarctica). Polar Biol 33, 761–773 (2010). https://doi.org/10.1007/s00300-009-0754-7
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DOI: https://doi.org/10.1007/s00300-009-0754-7