Abstract

Selenaria nitida, known only from the Peronian faunal province in Recent seas, is refigured from one of Maplestone's syntypes. Evidence suggests that the New Zealand material that Livingstone (1929) assigned to S. nitida Maplestone belongs to S. squamosa Tenison-Woods instead. The astogeny of S. nitida is discussed, with particular reference to the mode of ancestrular budding, and comparisons are made with S. cupola (Tenison-Woods) var. spiralis (Chapman) from the Victorian Tertiary. It is considered that this. taxon should be given specific status in view of its spiral mode of budding. The budding mechanism in Selenaria nitida was found to be substantially similar to that of multiserial encrusting cheilostomes, being initiated by two distal first-generation zooecia which bud off lateral-proximal successors to surround the ancestrula. These zooecia. then bud off serially, giving rise to the radial arrangement of zooecia in the adult colony. The same budding mechanism is exhibited by S. cupola (Tenison-Woods), another Victorian Tertiary fossil, and also S. squamosa Tenison-Woods, an Australasian species.

 
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Bibliographic Data

Short Form
Powell, 1966, Rec. Aust. Mus. 27(2): 27–31
Author
N. A. Powell
Year
1966
Title
Studies on Polyzoa (Bryozoa) from the Endeavour Expedition, 1909–1914. II. Colony formation in Selenaria nitida Maplestone
Serial Title
Records of the Australian Museum
Volume
27
Issue
2
Start Page
27
End Page
31
DOI
10.3853/j.0067-1975.27.1966.1515
Language
English
Plates
plate 2
Date Published
13 June 1966
Cover Date
13 June 1966
ISSN
0067-1975
CODEN
RAUMAJ
Publisher
The Australian Museum
Place Published
Sydney, Australia
Subjects
BRYOZOA
Digitized
09 December 2008
Available Online
06 March 2009
Reference Number
1515
EndNote
/Uploads/Journals/17441/1515.enw
Title Page
/Uploads/Journals/17441/1515.pdf
File size: 143kB
Complete Work
/Uploads/Journals/17441/1515_complete.pdf
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