Taxonomy of the Cyclostome Bryozoan Liripora MacGillivray and Some Related Australasian Taxa

概要

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Taxonomic problems concerning the identity of the cyclostome bryozoan genus Liripora MacGillivray, 1887 are addressed. The valid type species of Liripora is Diastopora fasciculata MacGillivray, 1885, not D. lineata MacGillivray, 1885 as has often been assumed. This latter species is the type species of Desmeplagioecia Canu and Bassler, 1920 erroneously regarded as an objective junior synonym of Liripora. Scanning electron microscopic study of Liripora shows the genus to have an unusual colony construction : autozooids at distal growing edges have interior-walled peristomes that protrude above the level of a laterally extensive kenozooidal space bounded proximally by a sloping interior wall. Skeletally mature autozooids generally lack or have only very limited areas of exterior frontal wall s. s., the upper surface of the colony being formed instead by the calcified exterior frontal walls of the surrounding kenozooids. In addition to the type species, two new species from New Zealand-Liripora pseudosarniensis and L. lobifera are placed in the genus, which appears to be endemic to Australasia. The three nominal species of Liripora are described, together with Desmeplagioecia lineata and a new species-Mesenteripora triregorum-that shows some resemblance to Liripora.
日本動物分類学会の論文
2001-05-31