Qingdaoella concinna (MacGillivray, 1885a) Liu & Liu & Zágoršek, 2019

Liu, H., Liu, X. & Zágoršek, K., 2019, Cyclostome bryozoans from Qingdao, South Yellow Sea, China, Zootaxa 4603 (3), pp. 473-500 : 485-487

Qingdaoella concinna (MacGillivray, 1885a) n. comb.

( Figs 32–35 )

Tubulipora concinna MacGillivray, 1885a: p. 94 , pl. 1, fig. 10.

Material examined. Specimens MBM 284453 ( Jiaozhou Bay), MBM 284495 and MBM 284494 (First Bathing Beach).

Additional material. More than 10 colonies from samples MBM 0 92380 ( Jiaozhou Bay), MBM 194688 (Lingshan Island) and MBM 283980 (First Bathing Beach).

Description. Colony encrusting, lobate to circular, approximately 2 mm in diameter. Autozooids usually arranged in slightly radial alternating rows, sometimes arranged quincuncially; peristomes very long, up to 400 µm; apertures circular (diameter ca. 100 µm), independent, never joined in fascicles. Gonozooid developed at margin of colony, wider (800–1200 µm) than long (400–500 µm), evenly perforated, pseudopores 8–10 µm in diameter. Ooeciopore ca. 40–50 µm in diameter. Ooeciostome long, erect, conical/tubular, slender, directed proximally, about 80–100 µm long, diameter of the base approximately 90–100 µm. Protoecium not observed.

Remarks. Qingdaoella concinna (MacGillivray, 1885a) n. comb. is very similar to the erect part of Entalophoroecia deflexa (as described by Hayward & Ryland 1985, p. 113, fig. 39), but differs in having encrusting colonies. Moreover, in E. deflexa , the ooeciostome is free, unattached, upright and almost parallel to the autozooidal peristome, whereas in Q. concinna n. comb. it is attached obliquely to an autozooidal peristome.

The most similar species is Tubulipora lucida MacGillivray, 1885a (p. 116, pl. 5, fig. 1) shows similar gono- zooid and arrangement of autozooidal tubes, but no ooeciostome illustrated (or described). Oncousoecia abrupta Osburn, 1953 (p. 626, pl. 65, figs 6, 7) has similar arrangement of autozooid, and similar shape of ooeciostome, but it is distally oriented

Qingdaoella concinna (MacGillivray, 1885) n. comb. differs from other similar species in having apertures not arranged in fascicles and very wide gonozooid with long, proximally directed ooeciostome.

Occurrence. Jiaozhou Bay, First Bathing Beach, Lingshan Island along the coast of Qingdao, and also Port Phillip Heads, Victoria, Australia.

Figures

FIGURES 32–35. Qingdaoella concinna (MacGillivray, 1885) n. comb. First Bathing Beach. 32–34. MBM 284494. 32. Long autozooidal tubes, with apertures in alternating, quincuncial series. 33. Detail of the slender, long, erect ooeciostome with the circular ooeciopore. 34. Position of the wide gonozooid spread among 6–8 autozooids and perforated by autozooidal tubes. 35. MBM 284495, detail of the proximally oriented ooeciostome situated near the distal edge of the gonozooid. Scale bars: 32–35 = 100 µm.