Family TUBULIPORIDAE Milne Edwards, 1838 
Genus IDMIDRONEA Canu, 1920 
TYPE SPECIES. Jdmonea maxillaris Lonsdale, 1845, by original 
designation (see Ostrovsky & Taylor 1996); Jacksonian (= 
Priabonian), Wilmington, North Carolina. 
?Idmidronea sp. Fig. 4 
MATERIAL. NHM BZ 4768. 
DESCRIPTION. Colony erect, branching, only proximal branches 
preserved, considerably thickened by kenozooidal overgrowths, 
basal branch up to 1.5 mm in diameter, attached to a cheilostome. 
Autozooids opening on laterofrontal sides of branches, with two or 
more apertures per series, most completely covered by kenozooidal 
overgrowths; visible apertures about 0.08—0.10 mm in diameter. 
Kenozooids extremely worn, narrow, apparently variable in growth 
direction. 
REMARKS. This basal fragment of an erect colony is impossible to 
assign with certainty to a particular genus although the likelihood is 
that it belongs to the common and diverse genus /dmidronea. Hinds 
(1975) showed how homeomorphic genera of ‘idmidroneid growth 
form’ cyclostomes could be recognized on the grounds of the 
presence, orientation and skeletal organization of the kenozooids. 
Branches beyond the immediate vicinity of the colony base and in a 
good state of preservation are required before generic attribution can 
be undertaken using Hinds growth mode criteria. In the case of the 
Red Bluff Tuff specimen, it is impossible even to determine whether 
the overgrowing kenozooids are fixed-walled (1.e. having calcified 
D.P. GORDON AND P.D. TAYLOR 
exterior frontal walls) or are free-walled (i.e. lacking calcified 
exterior frontal walls). 
Family CINCTIPORIDAE Boardman, McKinney & Taylor, 1992 
Genus CINCTIPORA Hutton, 1873 
TYPE SPECIES. Cinctipora elegans Hutton, 1873, by monotypy; 
Pliocene to Recent, New Zealand. 
Cinctipora solomoni sp. nov. Figs 8-11 
HoLotyPE. IGNS BZ 203-1, from Pukekio, Chatham Island. 
PARATYPES. IGNS BZ 203—2. NHM BZ 4769-4770. 
NAME. To commemorate Tommy Solomon (Tame Horomona 
Rehe) who died in 1933 as the last full-blooded Moriori, the first 
people to inhabit the Chatham Islands. 
DESCRIPTION. Colony erect, with narrow, cylindrical, bifurcating 
branches, 1.2—2.1 mm in diameter (typically less than 1.6 mm), 
widest immediately prior to bifurcation and narrowest immediately 
after bifurcation. Autozooids large, disposed in annular rings, 9-11 
zooids around branch circumference. Skeletal organization free- 
walled, each autozooid intersecting colony surface at a low angle, 
with an elongate, subhexagonal skeletal shield averaging 1.18 mm in 
length (n = 23 zooids from 4 colonies; range = 0.98—-1.37 mm) and 
0.39 mm in minimum width (n = 23 zooids from 4 colonies; range = 
0.30-0.54 mm). Skeletal shield having large interzooidal pores, 
diminishing in number distally, and occasional broad pustules. 
Figs 4-7 Erect branching cyclostomes. 4, ?/dmidronea sp., NHM BZ 4768, proximal branches and colony base, x 11. 5, ?Attinopora sp., NHM BZ 4771, 
x 29. 6, ‘Entalophorid’ sp., NHM BZ 4773, bifurcating branch, x 12. 7, ?Tetrocycloecia sp., NHM BZ 4778, worn branch, x 15. 
