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P J HAYWARD
Key to the higher taxa of marine Bryozoa
Reproduction and life histories
5 other sections not shown
absent adventitious Ancestrula areolae ascophorans ascopore ascus autozooids avicularia present Bay of Biscay broad broader than long bryozoans budded Busk Cheilostomata closed by zooidal coelom Colony encrusting Colony forming Continental Shelf developed distal disto-lateral Eggleston elliptical Embryos Escharella Escharina female zooids frontal membrane frontal pores frontal shield frontal surface Frontal wall Frontal wall smooth Gautier Genus growing edge gymnocyst Haplopoma hard substrata Hayward Hincks hyperstomial imperforate Isles kenozooids Kluge Later zooids lateral condyles Lepralia lophophore lyrula mandible marginal pores mucro nodular Norman offshore older zooids oral spines present oval to hexagonal Ovicell prominent Ovicellate zooids pair peristome Polypide Porella Primary orifice Primary orifice orbicular proximal border pseudosinus quadrate ridges Ryland Schizomavella Schizoporella sclerite secondary calcification shallow shell Shetland Shetland Isles sinus slender Smittia specimens suboral avicularium succeeding zooid sutures tatiform thickened transverse triangular Type species umbo umbones vertical walls vicarious avicularia western Mediterranean young zooids zooidal operculum Zooids oval