BRYOZOA (POLYZOA, ECTOPROCTA)

P.A. Gainey

Bryozoans are minute sessile colonial animals. There are two marine classes (Stenolaemata and Gymnolaemata). Gainey, in Spalding, A., (Ed) 1997, has previously reviewed the status of the marine bryozoans in Cornwall. There is no Red Data Book for these species and the following account is based on the author’s experience of the marine environment in Cornwall and Scilly and also Hayward (1985), Hayward & Ryland (1979 and 1985) and Ryland & Hayward (1977). 21 species have been listed here as pRDB or pNS to indicate that they would probably be considered for inclusion in a national book of RDB or NS species.

1. Stenolaemata

Plagioecia sarniensis

2. Gymnolaemata

2.1. Cheilostomata Anasca

Bugula calathus

Caberea boryi

Electra crustulenta

Hincksina flustroides

2.2. Cheilostomata Ascophora

Arthropoma cecilii

Celleporina decipiens

Diporula verrucosa

Escharella labiosa

Hippoporidra lusitanica

Puellina gattyae

Schizobranchiella sanguinea

Schizoporella dunkeri

Schizoporella longirostris

Smittoidea amplissima

Stephanolla armata

Turbicellepora magnicostata Orange Peel Bryozoan

Umbonula ovicellata

Watersipora complanata

2.3. Ctenostoma

Mimosella gracilis

Nolella stipata

Victorella pavida Trembling Sea-mat