LOWER CARBONIFEROUS BRYOZOA 
_ It is the only species of Fistulipora described from the British 
(sles. Several previously reported taxa are considered synonymous 
with it. These are Fistulipora minor M‘Coy, 1849 (see Owen 1969), 
and Berenicea megastoma M‘Coy, 1844, which Young (1882) con- 
sidered to be an immature F. incrustans colony (Bancroft & Wyse 
lackson 1995). 
F. excelens Ulrich, 1884, has a similar form and morphometric 
measurements to F incrustans (Phillips, 1836) and might be 
ynonymus. F. incrustans Moore (1929) (a secondary homonym) 
fom Texas has significantly larger elliptical to oval-shaped 
utozooecial apertures, which are surrounded by complete 
eristomes, and is not conspecific. On the other hand, the specimens 
lescribed as F. incrustans Moore by Warner & Cuffey (1973) from 
ne Lower Permian of Kansas are similar in most respects, and are 
robably conspecific with F. incrustans (Phillips, 1836). 
Some morphological variation is seen both within and between 
olonies although this is not as considerable as the variation re- 
orded by Warner & Cuffey (1973). They measured parameters in 
yhich high variation would be expected (eg. lunaria width and 
yapore dimensions). In this study a smaller number of parameters 
/ere measured: these are associated with the autozooecia (eg. 
oecial chamber width and spacing) and variation in them is 
Figs 85-88  Fistulipora incrustans (Phillips, 1836); Upper part of the Glencar Limestone (Viséan, Asbian), Carrick Lough, County Fermanagh; 85, 
BMNH PD9651, small dome-shaped adnate zoarium (encrusting Baculopora megastoma fragment) showing regular arrangement of autozooecia in 
curved intersecting rows; lunaria are situated on the upper edges of apertures, x10; 86, BMNH PD9652, chaetetiform colony showing monticular 
arrangement, x3.5; 87, BMNH PD9676;: 87a, transverse view of circular autozooecial apertures separated by vesicular tissue, x20; 87b, detail of 87a, 
| x60; 88, BMNH PD9675; 88a, longitudinal section showing three growth increments, simple tubular autozooecial chambers, and vesicular tissue 
_ comprising box-like vesicles with domed upper surfaces, x20; 88b, detail of 88a, x60. 
thought to be indicative of minor environmental changes (Farmer & 
Rowell 1973). 
STRATIGRAPHICAL RANGE. 
Lower Carboniferous (Courceyan)— 
Lower Permian. 
DISTRIBUTION.  Fistulipora incrustans is acommon species with a 
wide geographical range. It is frequent in the Lower Carboniferous 
of the British Isles, and has been recorded from the CIS (former 
Soviet Union), and North America. 
Family CYSTODICTYONIDAE Ulrich, 1884 
Genus SULCORETEPORA @ Orbigny, 1849 
TYPE SPECIES. Flustra? parallela Phillips, 1836 by original desig- 
nation from the Lower Carboniferous of Whitewell, Yorkshire, 
England. 
REVISED DIAGNOSIS. Cystodictyonid with erect zoaria composed 
of dichotomising bifoliate branches, elliptical to oval in cross- 
section. Branches retain a constant width along their length. 
Autozooecia are budded from a straight or zig-zag median wall 
