BRYOZOANS FROM CHATHAM ISLAND 
obscuring interzooidal boundaries; in the poorly-preserved material 
at hand these appear to be elongate-oval, with a single central 
foramen surrounded by a concentric granular cryptocyst. Ovicell 
endozooidal, immersed under the succeeding cryptocyst, the more- 
or-less semicircular opening occurring immediately distal to the 
opesia-orifice. 
REMARKS. The single tiny specimen, imperfectly preserved, com- 
prises only three complete zooids, all fertile, with parts of adjacent 
broken zooids. Most of the diagnostic characters are present but the 
generic attribution is uncertain. Aechmella Canu & Bassler, 1917 
seems ruled out, as the interzooidal avicularia of the type species are 
relatively large and distinct with acute rostra Hoplitaechmella 
species have numerous small avicularia, occasional vicarious 
avicularia, and endozooidal ovicells as in the present material but 
distinct oral-spine bases occur in the type and other species (see 
Voigt 1949; Berthelsen 1962). 
Known species include: 
H. antecedens (Brydone, 1914), Upper Senonian, England 
H. deshayesi (von Hagenow, 1851), Upper Senonian, The Nether- 
lands 
H. nitescens (Brydone, 1914), Upper Senonian, England 
H. nonna (von Hagenow, 1839), Upper Senonian, Germany 
H. smitti (Hennig, 1892), Danian, Sweden and Denmark 
H. vespertilio (von Hagenow, 1839), Upper Senonian, Germany 
H. vespertilioides Berthelsen, 1962, Upper Danian, Denmark. 
If the present material is Hoplitaechmella, then it represents the 
first known occurrence of the genus outside Europe, and the young- 
est stratigraphical record. 
19 
Figs 43, 44 
MATERIAL. IGNS BZ 209, a unique specimen from Pukekio, 
Chatham Island. 
DESCRIPTION. Specimen erect, apparently slightly worn, compris- 
ing part of a narrow bilamellar branch, 1.75 mm long and up to 1.16 
mm wide. Zooids sub-elongate, widest in the middle, tapering 
distally and proximally, length = 0.62—0.69 mm, width = 0.41-0.45 
mm, arranged such that there are three alternating longitudinal rows 
facing frontally on each side of the branch, separated by a row along 
each branch margin that faces laterally. Zooidal frontal shields 
flattened with the rims slightly elevated above the shield centre, 
implying a cryptocyst. Faint paired excavations proximolateral to 
the orifice in several zooids indicate opesiules; additional faint 
excavations may occur along the margins and in the centre of the 
shields, indicating possible accessory opesiules as well as sparse 
pseudopores. Opesia/orifice generally transversely oval, wider (0.13— 
0.15 mm) than long (0.10—0.11 mm). Oral spine bases absent, with 
the possible exception of one orifice in which a faint pair of 
excavations occurs distally. Ovicells and avicularia not present in the 
sole fragment. 
Microporid sp. 
REMARKS. Owing to the paucity of diagnostic characters it is not 
possible to be certain of the genus. Maastrichtian Puncturiella 
Levinsen (type species P. gudumensis Levinsen, 1925) is character- 
ised by cylindrical stems of zooids with coarsely perforated frontal 
shields and dimorphic opesiae/orifices. Species of the nominal 
subgenus Puncturiellina Voigt (type species Puncturiella (Punctu- 
riellina) subsculpta Voigt, 1987) (Maastrichtian-Danian) exhibit a 
range of colony forms including erect-bilamellar, the frontal 
Figs 43-44 Microporid sp., IGNS BZ 209. 43, part of erect bilamellar colony fragment, x 59. 44, close-up of an autozooid; positions of possible suboral 
opesiules and frontal pseudopores faintly indicated, x 126. 
