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A new species of Triptolemma (Porifera: Pachastrellidae) from the Pacific Ocean with a revision of the genus

Published online by Cambridge University Press:  11 November 2010

Marco Bertolino ,
D. Pica ,
G. Bavestrello ,
N. Iwasaki  and
B. Calcinai
Marco Bertolino*
Affiliation:
Dipartimento di Scienze del Mare, Università Politecnica delle Marche, Via Brecce Bianche, 60131, Ancona, Italy
D. Pica
Affiliation:
Dipartimento di Scienze del Mare, Università Politecnica delle Marche, Via Brecce Bianche, 60131, Ancona, Italy
G. Bavestrello
Affiliation:
Dipartimento di Scienze del Mare, Università Politecnica delle Marche, Via Brecce Bianche, 60131, Ancona, Italy
N. Iwasaki
Affiliation:
Usa Marine Biological Institute, Kochi University, Japan
B. Calcinai
Affiliation:
Dipartimento di Scienze del Mare, Università Politecnica delle Marche, Via Brecce Bianche, 60131, Ancona, Italy
*
Correspondence should be addressed to: M. Bertolino, Dipartimento di Scienze del Mare, Università Politecnica delle Marche, Via Brecce Bianche, 60131, Ancona, Italy email: m.bertolino@univpm.it
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Abstract

A new species, T. strongylata sp. nov. is described on the basis of material collected from the Pacific Ocean. The new species is characterized by the presence of sinuous strongyles. Moreover the incomplete description of T. simplex (Sarà, 1959) is implemented on the basis of new abundant material allowing, for the first time, the complete description of the skeleton of a Triptolemma species and the detecting of the presence of monaxonic spicules in the spicular complement of the genus. The skeleton is composed of a thick crust of disorderly arranged mesotriaenes and scattered microscleres, supported by diverging spicule tracts formed by oxeas towards the surface. Both species were recorded associated to boring sponges (Spiroxya and Cliona) in excavations of the calcareous scleraxis of precious corals or in organogenic concretions. In the cavities where the tissue of Triptolemma was recorded the wall of the excavation partially lost its typical pattern characterized by ovoid scars and became irregularly eroded. Our hypothesis is that Triptolemma insinuates inside the erosions produced by other sponges and it is able to enlarge them by an etching mechanism based on chemical dissolution only.

Keywords

DemospongiaeTriptolemmaboring spongesnew speciesprecious coralcoralligenous
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 91 , Special Issue 2: Biodiversity and Taxonomy , March 2011 , pp. 329 - 338
Copyright
Copyright © Marine Biological Association of the United Kingdom 2010

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