A new species of Hymeraphia Bowerbank, 1864 (Axinellida: Raspailiidae) from a deep-water canyon southwest off Ireland

The genus Hymeraphia currently comprises three species and all records of the genus are from the northeast Atlantic and the Mediterranean Sea. The present paper describes a new species, H. vaceleti sp. nov. from a deep-water canyon, off southwest Ireland. H. vaceleti sp. nov. is morphologically dist...

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Bibliographic Details
Published in:Zootaxa
Main Authors: MORROW, CHRISTINE, ALLCOCK, LOUISE A., MCCORMACK, GRACE
Format: Article in Journal/Newspaper
Language:English
Published: Mangolia Press 2018
Subjects:
Porifera
Sponges
systematics
taxonomy
Raspailiidae
singletons
uniques
monophyletic
28S rRNA
R.V. Celtic Explorer
Northeast Atlantic
Online Access:http://www.mapress.com/j/zt/article/view/zootaxa.4466.1.7
https://doi.org/10.11646/zootaxa.4466.1.7
Description
Summary:The genus Hymeraphia currently comprises three species and all records of the genus are from the northeast Atlantic and the Mediterranean Sea. The present paper describes a new species, H. vaceleti sp. nov. from a deep-water canyon, off southwest Ireland. H. vaceleti sp. nov. is morphologically distinct from other Hymeraphia species and 28S rRNA sequences show substantial differences between our new species and other Hymeraphia spp. We present data on the prevalence of sponge species established on the basis of single specimens (singletons) or uniques (species only known from a single locality). We argue for the recognition of singletons for species that are rare or from habitats that are very difficult to survey or sample, such as the deep sea.

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