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Demosponges of the genus Hymedesmia (Poecilosclerida: Hymedesmidae) from Rathlin Island, Northern Ireland, with a description of six new species
Goodwin, C.E.; Picton, B.E. (2009). Demosponges of the genus Hymedesmia (Poecilosclerida: Hymedesmidae) from Rathlin Island, Northern Ireland, with a description of six new species. Zool. J. Linn. Soc. 156(4): 896-912. https://dx.doi.org/10.1111/j.1096-3642.2008.00498.x
In: Zoological Journal of the Linnean Society. Academic Press: London. ISSN 0024-4082; e-ISSN 1096-3642, meer
Peer reviewed article  

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Trefwoord
    Marien/Kust
Author keywords
    circalittoral; digital photography; Hymedesmia hibernica; Hymedesmiapeachii; Hymedesmia primitiva; North Atlantic; sampling; scuba; taxonomy

Auteurs  Top 
  • Goodwin, C.E.
  • Picton, B.E., meer

Abstract
    Six new species of Hymedesmia (Hymedesmiidae, Poecilosclerida) are described from Rathlin Island, Northern Ireland: Hymedesmia cohesibacilla sp. nov., Hymedesmia umbelliformis sp. nov., Hymedesmia cratera sp. nov., Hymedesmia rathlinia sp. nov., Hymedesmia stellifera sp. nov., and Hymedesmia crami sp. nov. Additional descriptions are provided of the poorly known species Hymedesmia hibernica Stephens, 1916, Hymedesmia peachii Bowerbank, 1882, and Hymedesmia primitiva Lundbeck, 1910. The specimens were collected by scuba diving, and digital photographs were taken in situ; notes on external morphology are given, in addition to information on internal morphology and ecology. The majority of North-East Atlantic Hymedesmia species have been described from deep water, whereas this study sampled the little-researched circalittoral depths (30–50 m). Using scuba diving allowed us to take specimens from habitats such as crevices and bedrock, which, in this depth range and geographical area, have not previously been extensively sampled.

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