Chorizopora brongniartii ( Audouin, 1826 )

Min, Bum Sik & Seo, Ji Eun, 2016, Three Korean Cheilostomatous Bryozoans from Gageodo Island - new additions to the Korean fauna, Journal of Species Research 5 (3), pp. 566-570 : 4

1. Chorizopora brongniartii ( Audouin, 1826) ( Fig. 1 )

Flustra brongniartii Audouin, 1826: 240 .

Chorizopora brongniartii Harmer, 1957: 948 ; Powell, 1967: 252; Hayward and Ryland 1979: 240­241, Figures 103; Gordon, 1984: 113, pl. 44, fig. C; Tilbrook et al. 2001: 64, Figure 8C; Tilbrook 2006: 102, Figure 17B­D; Dick et al. 2006: 2217­2218, Figure 7C, D.

Material examined. NIBRIV0000325940, Gaerinyeo Island , Gageodo Island, 13 Aug. 1998 by SCUBA diving from 18­23 m in depth .

Description. Colony encrusting, forming thin and broad incrustation on substratum, translucent, unilaminar, fragile. Zooids oval, flat or slightly convex, pores between zooids. Adjacent zooids linked by short tubules. Frontal wall smooth, hyaline, imperforate, fine transverse grained, with conical frontal umbo. Orifice semicircular, D-shaped, larger in ovicellate zooids. Avicularia interzooidal, small and round, or triangular, linked to adjacent zooids by communication tubes. Ovicell prominent, hyperstomial, smooth, imperforate, associated with an avicularium on its top.

Zooid ············································387­478 × 215­267 μm Orifice ··············································83­87 × 118­130 μm Avicularia··········································· 87­111 × 45­58 μm Ovicell··········································188­201 × 168­174 μm

Distribution. Korea, China, Philippines, Vanuatu, New Zealand, Galapagos Islands, Hawaii, British, Mediterranean Sea, Myanmar, Sri Lanka, South Africa. Red Sea.

Remarks. This species is apparently almost cosmopolitan, distributed through all the world’s seas, except for polar waters (Hayward and Ryland, 1979). Korean specimen is mostly similar to New Zealand’s one ( Gordon, 1984). However, the latter has no spines except on ancestrula, whereas the former has occasionally a pair of spines. Besides a few of small papillae are shown on the frontal wall of some zooids in Korean specimen.

Figures

Fig. 1. Chorizopora brongniartii (Audouin, 1826).A, zooidal arrangement; B, basal view of zooids; C, orifice, avicularia of ovicell; D, ori­ fice and avicularia. Scale bars: A, B. 500μm. C, D. 200 μm.