LOWER CARBONIFEROUS BRYOZOA 
‘TE 10 
Fig. 41 Clausotrypa ramosa (Owen, 1973) comb. nov. Line drawing of 
external features of BMNH PD9627; a, colony form, scale bar = 1 mm; 
b, detail of autozooecial apertures; scale bar = 0.1 mm. 
‘Table 15 Measurements on Clausotrypa ramosa (in mm). N=17. 
MN x Mn Mx (CW wCVb 
2D 102 0.73 0.46 TEND) 7.56 5.97 
AD1 107 0.11 0.06 0.16 13.06 9.68 
AD2 106 0.08 0.05 0.14 14.87 7.67 
IWT1 Si7/ 0.53 0.28 0.85 12.85 4.14 
~TWT2 64 0.25 0.15 0.42 17.38 4.38 
Z2 13 3.4 2, 5 16.05 3.9 
ET 6 0.42 0.31 0.52 10.60 4.34 
0.07 0.03 0.17 14.54 1.33 
these only one, C. limpida Gorjunova, 1988, is from the Carbonifer- 
ous, while all the rest occur in Permian strata. Comparison of C. 
139 
ramosa with these species shows it to be distinct from them all (see 
Table 16). It is morphologically most similar to C. monticula (Eich- 
wald, 1860) but differs significantly by having thicker branches and 
larger autozooecial apertures. Bassler (1929) regards Rhombopora? 
spiralis Ulrich 1890 from the Carboniferous of Kentucky as belong- 
ing to Clausotrypa. However, after examination of the original 
description and figures I consider the taxon to be correctly identified 
by Ulrich. 
STRATIGRAPHICAL RANGE. Lower Carboniferous (Asbian). 
DISTRIBUTION. Carrick Lough and Sillees River, County Ferman- 
agh and Tullaghoge, County Tyrone, Ireland. 
Order FENESTRATA Elias & Condra, 1957 
Family ACANTHOCLADIIDAE Zittel, 1880 
Genus BACULOPORA Wyse Jackson, 1988 
TYPE SPECIES. Vincularia megastoma M‘Coy, 1844 by original 
designation, from the Lower Carboniferous (Viséan, Brigantian) of 
Killymeal, Dungannon, County Tyrone, Ireland. 
Baculopora megastoma (M‘Coy, 1844) Fig. 43 
MATERIAL. BMNH PD8109-PD8127, TCD.29284-29303, 
TCD.34124, 34131, 34156, 34162; NMI: F19501-F19520; BELUM 
K3137, K3436, K12088-K12107, Upper part of the Glencar Lime- 
stone, Viséan (Asbian), Carrick Lough, County Fermanagh. BMNH 
PD8128-PD8132; TCD.42535-42538, Upper part of the Glencar 
Limestone (Viséan, Asbian), Sillees River, County Fermanagh. 
fig.42 Measurements taken on fenestrates in this study. a, Diploporaria tenella; b, Ichthyorachis newenhami:; ¢, Rhombocladia dichotoma. AD = 
Autozooecia apertural diameter; AD1 = Autozooecia apertural diameter measured parallel to growth direction; AD2 = Autozooecia apertural diameter 
measured perpindicular to growth direction; AR = Number of longitudinal autozooecial rows; AS = Autozooecia apertural spacing: minimum distance 
between two adjacent autozooecial apertures, measured from their centres; AS] = Autozooecia apertural spacing measured parallel to growth direction; 
AS2 = Autozooecia apertural spacing measured perpendicular to growth direction; AWT = Autozooecial chamber wall thickness; BW = Branch width: 
ET = Endozone thickness; HL = Hemiseptum length; LBW = Lateral branch width measured perpendicular to growth direction; LBS = Spacing between 
the centres of two successive lateral branches; MBW = Main branch width measured perpendicular to growth direction; NS = Nodal spacing: distance 
between two adjacent carinal nodes; TE = Exozone thickness; ZD1 = Length of autozooecial chamber; ZD2 = Width of autozooecial chamber; ZL2 = 
Number of autozooecial apertures contained in a 2mm line drawn parallel to growth direction; ZT = Zoarial thickness; ZT 1 = Number of autozooecial 
apertures contained in a 1mm line drawn perpendicular to growth direction; ZW = Zoarial width. 
