New species and records of Cirratulidae (Annelida, Polychaeta) from methane seep and seamount habitats in the Pacific Ocean off Costa Rica
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https://mapress.com/zt/article/view/zootaxa.5869.2.1Abstract
Eight species of polychaetes in six genera belonging to the family Cirratulidae are reported from seamounts and methane seeps off Costa Rica in the Pacific Ocean. Seven species are new to science. The genus Aphelochaeta includes two new species: A. pigmentata sp. nov., and A. rotunda sp. nov. The genera Chaetocirratulus, Chaetozone, Kirkegaardia, and Raricirrus each include a single new species: Chaetocirratulus chromatus sp. nov., Chaetozone carinata sp. nov., K. davidgeorgei sp. nov., and R. hartmanae sp. nov. The genus Cirratulus includes two species: C. megalus Chamberlin, 1919 originally described from deep water off Peru, and Cirratulus jacoensis sp. nov. from Jacó Summit off Costa Rica. The samples in which these taxa were found are all from deep water (>200 m) with most from bathyal depths of 1000–2184 m. Cirratulus tumbesiensis Carrasco, 1978 from Chile is referred to the genus Cirriformia.
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