Biflustra perambulata n. sp. (Cheilostomata: Bryozoa), a new alien species from Cochin Harbour, Kerala, India Author Louis, Soja text Zootaxa 2009 2066 59 68 journal article 10.5281/zenodo.186996 0922cb6a-7528-4b89-9010-7d602861702e 1175-5326 186996 Family Membraniporidae Busk, 1852 Diagnosis. Colony encrusting, sheet-like, unilamellar, or with erect, frondose, tubular or vincularian growths from an encrusting base. Zooids elongate-oval (peri-ancestrular) to mostly rectangular, the membranous frontal wall covering the entire opesia or there is an area of proximal gymnocyst. A proximal cryptocystal shelf, with or without granulations and/or denticles, variably developed or lacking altogether. No avicularia. Polypide with an intertentacular organ. Ovicells absent, oligolecithal eggs released to the sea where they develop into planktonic cyphonautes larvae. Ancestrula twinned, constituting a diagnostic apomorphy for the family ( Taylor & Monks 1997 ).