BRYOZOANS FROM CHATHAM ISLAND 
Figs 8-11 Cinctipora solomoni sp. noy. 8-9, IGNS BZ 203-1, holotype; 8, bifurcating branch, x 13; 9, skeletal shields, including one example (lower 
right) divided by a transverse wall, x 40. 10-11, IGNS BZ 203-2, paratype; 10, x 28; 11, interzooidal pores on skeletal shield, x 265. 
Aperture width averages 0.23 mm (n = 23 zooids from 4 colonies; 
range = 0.18—0.30 mm). 
REMARKS. This species is very similar to C. elongata Boardman et 
al. (1992) which is also recorded from the Chatham Islands, though 
from the considerably younger Whenuataru Tuff (Pliocene). How- 
ever, colony branches in C. solomoni are typically narrower, with 
generally fewer zooids around the branch circumference (9-11 cf. 
10-16), and the zooids are smaller and less elongate: length:minimum 
width ratio is about 3:1 in C. solomoni compared with 4:1 in C. 
elongata. Unlike other species of Cinctipora, none of the specimens 
of C. solomoni have terminal diaphragms but it is unclear whether 
this is due to preservational factors or ontogenetic stage of the 
available zooids, or is a species difference. Two autozooids from 
separate branches have a transverse wall subdividing their skeletal 
shields into proximal and distal halves (Fig. 9). In another branch the 
apertures of several proximal autozooids are plugged by clusters of 
small zooids which are best interpreted as kenozooids, although it is 
possible that they are the zooids of a fouling species which settled 
within the dead autozooids of an old branch of C. solomoni. 
At the present day Cinctipora is endemic to the seas around 
New Zealand, and knowledge of the fossil record suggests that it 
has been so throughout the Neogene. Hitherto, the only pre- 
Neogene record of putative Cinctipora is from the Upper 
Cretaceous of South Africa (Boardman ef al., 1992), but there is 
some doubt about the correct attribution of this Upper Campanian 
or Maastrichtian species, especially in view of the small size of 
the zooids compared with all other cinctiporids which are charac- 
terized by zooidal gigantism. Therefore, the recognition of an 
unquestionable species of Cinctipora in the Red Bluff Tuff is 
important in providing a clear range extension of the genus in its 
modern biogeographical province back into the Late Paleocene or 
