BRYOZOANS FROM CHATHAM ISLAND 
Figs 32-35 Calloporid cheilostomes. 32-33, Flustrellaria australis sp. nov., IGNS BZ 184, holotype; 32, two entire autozooids, the one on the right with 
the base of a broken ovicell present on the gymnocyst of the distal zooid; note the lack of a proximal gymnocyst on some of the adjacent zooids, x 96; 
33, close-up of the broken ovicell base, x 287. 34-35, Akatopora chathamica sp. noy., IGNS BZ 185-1, holotype; 34, three ovicellate zooids, x 107; 35, 
a heterozooid on the lateral rim of an autozooid, x 430. 
give precision to the characters of the type species. One potential 
problem appeared in that d’Orbigny’s family-rank taxon Flustrella- 
radae d’Orbigny, 1852 antedates the well-known equivalent taxon 
Calloporidae Norman, 1903. According to Sherborn (1899), how- 
ever, the name Flustrellaradae was formally published in the year 
prior to its type genus, thus it may be treated as a nomen nudum and 
the current usage of family Calloporidae and superfamily Callop- 
oroidea (Gordon 1989a) can remain unaffected. 
An encrusting species from Chatham Island appears to conform 
to the characters of Flustrellaria, which, if the generic attribution is 
correct (the specimen appears to lack spine bases), would be the 
youngest species of the genus, extending the range beyond the KT 
boundary. 
Flustrellaria australis sp. nov. Figs 32, 33 
HOLOTYPE. IGNS BZ 184, from Pukekio, Chatham Island. No 
paratypes. 
NAME. From the Latin, australis, southern. 
DESCRIPTION. Unique colony encrusting, unilaminate; multiserial 
but somewhat linear in form with maximum diameter 14 mm (ca. 10 
mm on one side of the ancestrular region) but, since the substratum 
is fractured, the original diameter may have been several mm longer; 
with pluriserial lobes 2—?8 zooids wide. Zooids arranged 
quincuncially, each being surrounded by 6 others, suboval to pyri- 
form in shape; length = 0.29-0.39 mm, width = 0.28-0.30 mm in the 
zone of astogenetic change; length = 0.44—0.62 mm, width = 0.31— 
