Pacificincolidae Liu and Liu, 1999

Family Pacificincolidae Liu and Liu, 1999 View in CoL

Diagnosis. Colony encrusting or encrusting-erect and sometimes rising into forming frilled massive colony when older. Zooids irregularly rectangular to subhexagonal. Frontal wall uniformly perforated and granulated. Orifice semicircular with a pair of condyles forming sinus, and without oral spines. Peristome distinct or confined to a raised rim, with proximal raised umbo and a small opening of a heterozooid between the umbo and the orifice. Spines lacking. Ovicell hyperstomial, prominent, endooecium imperforate or perforated on the surface, with membranous ectooecium thickened by secondary calcification. The frontal wall of the ancestrula is covered by lateral daughter zooids or remains free.