158 
which is composed of a dark central granular skeleton surrounded by 
laminated skeleton. Autozooecia are arranged in longitudinal rows. 
Zooecial chambers are long and narrow in the endozone and bend 
sharply in the exozone. In tangential section, chambers are rectangu- 
lar in shape. Vesicles are found in the outer endozone and inner 
exozone, where they occur as irregular to circular cavities. They 
become less abundant towards the zoarial margin. Indistinct lunaria 
are found on the proximal edge of the large oval-shaped autozooecial 
apertures. Interapertural areas are smooth with a single longitudinal 
ridge developed between adjacent autozooecial rows. 
DISCUSSION. Taxonomically Sulcoretepora has presented many 
problems and prompted much argument. At ordinal level it was first 
regarded as a cryptostome (Vine 1884a), and this view was main- 
tained until recently (Cuffey 1973). It is now recognised as a 
cystoporate (Morozova 1970, Utgaard 1983). At generic level 
Sulcoretepora was first described by d’Orbigny (1849), who desig- 
nated Phillip’s species Flustra? parallela as type species. 
Subsequently, Ulrich (1882) erected the genus Cystodictya (type 
species, C. ocellata from the Mississippian of Somerset, Kentucky, 
U.S.A.) and placed Sulcoretepora in synonymy with it on account of 
the shared presence of a median wall. Many authors have followed 
this opinion (eg. Young 1887, Vine 1888). Close examination of the 
two genera shows that there is a difference in the shape and nature of 
the median wall. It is always straight in Cystodictya, but is undula- 
tory or sharply folded inSulcoretepora. Mstainia Shulga-Nesterenko, 
1955, has a plicated median wall and is regarded a junior subjective 
synonym of Sulcoretepora (Elias 1964). 
STRATIGRAPHICAL RANGE. Devonian—Permian. 
DISTRIBUTION. British Isles, Europe, the CIS (former Soviet Un- 
ion), United States, Asia. 
Sulcoretepora parallela (Phillips, 1836) Figs 84b, 89-93 
1836 = Flustra? parallela Phillips: 200, pl.1, figs 47, 48. 
1843 = Flustra? parallela Phillips; Morris: 37. 
v1844 ~~ ~Vincularia parallela (Phillips); M*Coy: 198, pl. 27, fig. 
14. 
1849  Sulcoretepora parallela (d’Orbigny); d’Orbigny: 152. 
1854  Sulcoretepora parallela (d’ Orbigny); Morris: 105. 
1862 — Vincularia parallela (Phillips); Griffith: 227. 
1877 — Sulcoretepora parallela (Phillips); Vine: 273. 
1880c Ptilodictya? parallela (Phillips); Vine: 508. 
1884a Arcanopora parallela (Phillips); Vine: 204. 
1885 Cystodictya parallela (Phillips); Vine: 95. 
1887  Cystodictya parallela (Phillips); Young: 461. 
1888  Cystodictya parallela (Phillips); Vine: 74. 
1953 Sulcoretepora parallela (Phillips); Bassler: 142, fig. 103. 
1964  Sulcoretepora parallela (Phillips); Elias: 380, pl. 5, figs 
3-6. 
1969 = Sulcoretepora parallela (Phillips); Owen: 265, pl. 23, figs 
E-F. 
1983 Sulcoretepora parallela (Phillips); Utgaard: 429, fig. 210, 
la-f. 
1986a Sulcoretepora parallela (Phillips); Bancroft: 23. 
1987 — Sulcoretepora parallela (Phillips); Bancroft: 196. 
199] Sulcoretepora parallela (Phillips); Billing: 41. 
MATERIAL. BMNH PD9563, 9619, 9677-9700; TCD.34104- 
34111, 34138, 34142, 34146, 34148-34153, 34157-34158, 34172, 
42596, 42600b, 42605; BELUM K2158. Upper part of the Glencar 
Limestone (Viséan, Asbian), Carrick Lough, County Fermanagh. 
P.N. WYSE JACKSON 
Figs 89-92 Sulcoretepora parallela (Phillips, 1836); Upper part of the 
Glencar Limestone (Viséan, Asbian), Carrick Lough, County 
Fermanagh; 89, BMNH PD9677, branch fragment showing arrangement 
of autozooecia in longitudinal rows separated by longitudinal ridges, 
x15; 90, BMNH PD9678, as 89; lunaria are more pronounced 
proximally of autozooecial apertures; the size and spacing of 
autozooecial apertures increases in rows from left to right, x15; 91, 
BMNH PD9619, transverse section showing scalloped branch margins, 
atypical straight median wall, and elongate polygonal autozooecial 
chambers with rounded lateral margins, x50; 92, BMNH PD9563, 
transverse section with more typical plicated median wall, x20. 
TCD.42555-42558, Upper part of the Glencar Limestone (Viséan 
Asbian), Sillees River, County Fermanagh. 
DESCRIPTION. Zoaria form quite large expansions of dorso 
ventrally flattened branches that are elliptical or oval in cross-section 
Bifurcation of branches is more common than the development 0 
lateral branches, which are thinner than the main branch. The larges 
fragment measured is 38.8mm in length and no lateral branche 
