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1 March 2011 Microscopic Anatomy and Pigment Characterization of Coral-Encrusting Black Sponge with Cyanobacterial Symbiont, Terpios hoshinota
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Abstract

Terpios hoshinota is a black-colored sponge encrusting both live and dead corals. On examination, we determined that in the mesohyl, unicellular cyanobacteria were distributed extracellularly in dense populations; roughly half of the area in the histological sections was occupied by the cyanobacterial cells in the mesohyl of the inner zone. Pigment extraction tests of whole sponges and microspectrophotometrical analysis of cyanobacterial symbionts showed that the black coloration of the sponge is attributable to extremely densely packed cyanobacteria expressing R-phycoerythrin. Spermatic follicles were found in the mesohyl of specimens collected in summer, indicating seasonal reproduction, which is likely to play a crucial role in long-distance dispersal. We also found a possible oocyte that did not contain cyanobacteria in the ooplasm.

© 2011 Zoological Society of Japan
Euichi Hirose and Akio Murakami "Microscopic Anatomy and Pigment Characterization of Coral-Encrusting Black Sponge with Cyanobacterial Symbiont, Terpios hoshinota," Zoological Science 28(3), 199-205, (1 March 2011). https://doi.org/10.2108/zsj.28.199
Received: 29 June 2010; Accepted: 1 September 2010; Published: 1 March 2011
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