Cliona minuscula, sp. nov. (hadromerida: clionaidae) and other bioeroding sponges that only contain tylostyles

  • Schonberg C
  • Grass S
  • Heiermann A
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Abstract

A new bioeroding sponge belonging to the genus Cliona is described from the Australian GreatBarrier Reef, Cliona minuscula, sp. nov. As the sponge lacked microscleres, comparison withexisting clionaid species was difficult. We considered 15 other species of Cliona with onlytylostyles: C. alderi, C. arenosa. C. caesia nov. comb., C. californiana, C. celata, C. delitrix, C.dissimilis, C. ecaudis, C. insidiosa, C. janitrix, C. kempi, C. laticavicola, C. macgeachii, C.millepunctata and C. peponaca. Characters of all species are presented in table-form to facilitatecomparison during future studies. We listed additional species of Cliona that were not directlycompared to the new species, because they were either invalid, insufficiently described, or they maynot be obligate bioeroders. The form and dimensions of the megascleres of C. minuscula, sp. nov.indicated that it is distinct from all considered species. Its mean tylostyle dimensions were 225.3μm length, 4.5 μm shaft width and 6.8 μm tyle width, which is comparatively small. Because othermorphological features were small as well (erosion chambers, papillar diameter), this species wasnamed C. minuscula. The species record for sponges of the genus Cliona reported from Australia isnow 11.

Author-supplied keywords

  • Cliona minuscula
  • Description
  • Faunistics
  • New species
  • Porifera
  • Taxonomy

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