10 
D.P. GORDON AND P.D. TAYLOR 
Figs 18-21 
Ceriopora rekohuensis sp. noy. 18-19, IGNS BZ 204-1, holotype; 18, upper surface of colony, x 10; 19, abraded gonozooid with roof 
remnant on left, x 35. 20-21, NHM BZ 4777, paratype; 20, entire colony, x 16; 21, autozooidal and kenozooidal apertures, x 170. 
cases only the broken stump of one erect branch remains, the 
arborescent parts of the colonies having been lost along with any 
taxon-diagnostic gonozooids. Characters of the basal zooids show 
quite clearly that the two specimens represent different species. 
However, it is unclear whether they are species whose erect branches 
have yet to be recovered in the Red Bluff Tuff, or if they are the bases 
of the three fixed-walled, erect species described above as 
?Idmidronea sp., ?Attinopora sp. and “Entalophorid’ sp. 
Erect tubuliporine base sp. | Figs 14-15 
MATERIAL. NHM BZ 4775. 
DESCRIPTION. Colony base encrusting, comprising narrow (0.5— 
1.0 mm wide), oligoserial branches, with 2-4 series of autozooids 
bordered by kenozooids forming branch edges; branch profile 
low, gently convex; two branch bifurcations present, each at an 
angle of about 120°; stump of a broken erect branch, subcircular 
in cross-section, present at distal end of one of the encrusting 
branches. Autozooids with short, slightly convex frontal walls, 
about 0.4 mm long by 0.18 mm wide, their long axes divergent 
from branch mid-line; apertures more-or-less circular, 0.11—0.13 
mm in diameter; pseudopores longitudinally elongate. Gonozooids 
absent. 
REMARKS. The well-preserved colony, which encrusts an echinoid 
plate, has a maximum dimension of 7 mm and comprises three, long 
encrusting branches. The broken base of an erect branch is visible at 
the distal end of one of these three encrusting branches. 
