Exceptionally abundant, three dimensional Paraconularia planicostata (Dawson) occur in massive limestones in the Late Mississippian (mid Visean) Big Cove Formation (Aguathuna, Newfoundland) and lower Windsor Group (Irish Cove, Nova Scotia). At both localities, truncated Paraconularia may be overlapped by other fossils, including (at Aguathuna) microbial rinds, and the faces may exhibit one or more holes, the edges of which, again, may be overlapped by other fossils. No specimens terminate in an apical wall or schott. Additionally, the inner and/or outer surface of the conulariids commonly is encrusted by Spirorbis. At Aguathuna, the attitude of Paraconularia and serpulid tubes appears to be random, though many of the conulariid specimens are oriented with the oral end facing directly or obliquely downward, and both they and serpulids commonly occur in monospecific clusters of mutually overlapping specimens. At Irish Cove the apertural end of the conulariids, many of which occur in V-like pairs or radial clusters, is preferentially directed toward the northeast. At Aguathuna 60% of observed geopetal structures in conulariids, Beecheria sp., and serpulid tubes are inverted or strongly tilted. Together, these observations indicate that Paraconularia and associated fossils underwent short distance transport and reorientation prior to final burial. Moreover, some fossils were transported and reoriented after they had been filled with geopetal sediment and cement. Probably in association with transport, conulariids were subjected to mechanical breakage. These results cast additional doubt on the hypothesis that the biota of the lower Big Cove Formation was a low temperature hydrothermal vent community that inhabited deep (> 100 m), generally quiescent marine waters, but they are consistent with the alternative hypothesis that this biota inhabited shallow, brackish inlets subject to pulses of high energy.