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Cyclostomatous Bryozoa from the Coastal Waters of East Africa

1976; Wiley; Volume: 5; Issue: 1-4 Linguagem: Inglês

10.1111/j.1463-6409.1976.tb00709.x

1463-6409

Krister Brood,

Aquatic Invertebrate Ecology and Behavior

Abstract Brood, K. (Section of Palaeozoology, Swedish Museum of Natural History, S‐10405 Stockholm, Sweden). Cyclostomatous Bryozoa from the coastal waters of East Africa. Zool. Scr. 5 (6): 277–300, 1976.—The living fauna of Cyclostomatous Bryozoa off the East African coast has been investigated from a number of dredgings ranging from 50 to 700 m depth and from collections made by free diving. Thirty‐four species have been found, of which the following thirteen are new: Crisia zanzibarensis sp.n., C. transversata sp.n., C. bifurcata sp.n., Harmelino‐pora plana sp.n., Stomatopora papillosa sp.n., S. rugosa sp.n., Serpenti‐pora africana sp.n., Idmonea murogensis sp.n., Idmidronea biporata sp.n., Pseudonevianopora pembaensis sp.n., Filisparsa gracilis sp.n., Pustulopora danziensis sp.n., Hemipusluhpora harmeri sp.n. and Crisina parvula sp.n. Three new genera are described: Harmelinopora gen.n., which is characterized by tubuliporid wall structure, encrusting growth, short zooecia, and shelf like hemisepta; Pseudonevianopora gen.n., which has a tubuliporid wall structure, “nevianoporid” arrangement of autozooecia, and several hemisepta within the peristome: and Hemipustulopora gen.n., which has tubuliporid wall structure, erect cylindrical stems with budding from the centre, zooecia opening on one side only and a large gonozooecium. — Three major species associations can be detected. One group characterizes shallow water and reefs and is dominated by Dis‐porella sibogae Borg, Lichenopora noeae‐zelandiae (Busk), Pustulopora danziensis, Idmonea murogensis and Harmelinopora plana. A second is best developed between 80 and 120 m on the North Kenya Banks and is dominated by Crisia elongala Milne‐Edwards, C. zanzibarensis, Nevianopora pulcherrima (Kirkpatrick), Pustulopora delicatula Busk and Crisina radians (Lamarck). The third is found in deeper water and is dominated by Idmidronea biporata, Crisina parvula, Pseudonevianopora pembaensis and Filisparsa gracilis. The Cyclostomatous fauna is basically similar to that of the Indonesia and Philippines but differs from the Eastern Pacific.