Microporella marsupiata ( Busk, 1860 )

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 : 5

2. Microporella marsupiata ( Busk, 1860) ( Fig. 2 )

Lepralia marsupiata Busk, 1860: 284 .

Microporella coronata : Marcus, 1938: 235. Microporella marsupiata : Hayward and Ryland, 1979: 220; Gordon, 1984: 102-103, pl. 39, figs. B, C.

Material examined. NIBRIV0000325938, Gaerinyeo Island , Gageodo Island, 13 Aug. 1998 by SCUBA diving from 18­23 m in depth .

Description. Colony encrusting. Zooid hexagonal, distinct, granular with numerous small pores. Orifice semicircular, wider than long and proximal rim with minutely saw­toothed. Oral spines 5­7, dark­brown chitinous bases. Ascopore crescentic and toothed. Avicularia usually pair­ ed, with ascopore at level, directed obliquely distally, round proximally, bluntly triagular distally, crossbar complete. Ovicell prominent, granular, and associated with a pair of oral spines.

Zooid············································596­633 × 398­459 μm Orifice ·············································· 81­93 × 111­127 μm Avicularia·············································69­75 × 43­53 μm Ascopore ··············································55­63 × 59­81 μm Ovicell··········································186­202 × 269­308 μm

Distribution. Korea, New Zealand, Mediterranean Sea, SW English Channel, Madeira, Cape Verde Islands, Gulf of Guinea, Saint Helena.

Remarks. The zooids of Korean specimen are larger than in ones of New Zealand. In terms of numbers of oral spines, five is common in our specimen, whereas six to seven in New Zealand’s one ( Gordon, 1984).

Figures

Fig. 2. Microporella marsupiata (Busk, 1860).A, zooidal arrangement; B, ovicell; C, orifice, spines and avicularia; D, ascopore. Scale bars:A. 1 mm. B. 100μm. C. 200 μm. D. 50 μm.