Novel taxa of Cheilostomata Bryozoa discovered in the historical backlogs of the Iziko South African Museum Author Boonzaaier-Davids, Melissa K. Research and Exhibitions Department, Iziko Museums of South Africa, Cape Town, 8000, South Africa. & Biodiversity and Conservation Biology Department, University of the Western Cape, Cape Town, 7535, South Africa. Author Florence, Wayne K. 0000-0003-0224-2874 Research and Exhibitions Department, Iziko Museums of South Africa, Cape Town, 8000, South Africa. & wflorence @ iziko. org. za; https: // orcid. org / 0000 - 0003 - 0224 - 2874 wflorence@iziko.org.za Author Gibbons, Mark J. 0000-0002-8320-8151 Biodiversity and Conservation Biology Department, University of the Western Cape, Cape Town, 7535, South Africa. & mgibbons @ uwc. ac. za; https: // orcid. org / 0000 - 0002 - 8320 - 8151 mgibbons@uwc.ac.za text Zootaxa 2020 2020-07-27 4820 1 105 133 journal article 8923 10.11646/zootaxa.4820.1.5 ce83a1e1-c5fb-4b14-87a3-658d8f417ba8 1175-5326 4397377 033AB19B-0887-42F3-B284-E3D40148FE7B Chaperiopsis familiaris ( Hayward & Cook, 1983 ) n. comb. ( Fig. 3A, B ) Chaperia familiaris Hayward & Cook, 1983 : p. 23 , figs 3C–E, 7A. Material examined. SAMC-A077585 (dry), FAL 84 ; SAMC-A077426 (dry), FAL 415 ; SAMC-A077435 (in ethanol) , SAMC-A077440 (in ethanol), FAL 432. Additional comparative material: ‘ Chaperia familiaris ’, SAMCA026415 ( holotype ), station SM 162 ( 32°55’S , 28°31’E ), off Morgan’s Bay , Southeast Coast , South Africa , heavy dredge, depth 630 m , 25 May 1978 . SAMC-A026487 , station SM 163 ( 33°04.6’S , 28°06.6’E ), off East London , Southeast Coast , South Africa , heavy dredge, depth 90 m , 26 May 1978 . Remarks. Chaperiidae Jullien, 1888 comprises several genera of which the most diverse are Chaperia Jullien, 1888 and Chaperiopsis Uttley, 1949 (www. bryozoa .net, accessed 06 June 2020 ). The differences between these two genera are the absence of avicularia and ovicells in Chaperia— possessing internal brooding of embryos ( Ostrovsky et al. 2009 )—while avicularia may be present or absent, and ovicells are present in all species of Chaperiopsis . Chaperia familiaris Hayward & Cook, 1983 forms small encrusting patches on hard substrata including other bryozoans. It has hexagonal-shaped autozooids, rounded distally, with oval opesia, distinct occlusor laminae, no avicularia and two pairs of distolateral spines—typically, the distal pair is cylindrical and the proximal pair is forked. This species also has a distinct hemispherical ooecium that is wider than long, with a transversely oval frontal foramen (membranous area in non-cleaned specimens) ( Hayward & Cook 1983 ) ( Fig. 3A, B ). The presence of a prominent ooecium suggests that Chaperia familiaris fits better in Chaperiopsis . Previously reported only from the Southeast Coast , the geographical distribution of C. familiaris n. comb. now includes False Bay on the South Coast at 48–630 m depth range .