Nevianipora rugatata

Chae, Hyun Sook, Yang, Ho Jin & Seo, Bum Sik Min and Ji Eun, 2023, Three new records of Korean cyclostomatous bryozoans, Journal of Species Research 12 (4), pp. 362-367 : 363-364

2. Nevianipora rugatata (Liu in Liu, Yin & Ma, 2001)

( Fig. 3 )

Tubulipora rugatata Liu in Liu, Yin & Ma, 2001: 790.

Nevianipora rugatata : Liu, Liu & Zágoršek, 2019: 488.

Material examined. Korea: Jeju-do: Seogwipo-si, Marado Island , 4 July 2015, depth 15 - 30 m.

Substratum. Unknown.

Description. Colony erect, branching. Branches dichotomous or trichotomous, 985 - 1,094 μm wide, up to 1,778 - 2,090 μm wide at bifurcation. Cross bar consisted of numerous kenozooids connecting between branches, sometimes present ( Fig. 3A ). Autozooids tubular, elevated, arranged in indistinct of 5 - 8, concentric striated, 138 - 445 μm long × 86 - 113 μm wide, directed slightly outwards and upwards, two or three autozooids in a row at both lateral sides of branch ( Fig. 3A, B ). Apertures circular or oval, approximately 70 - 130 μm in diameter ( Fig. 3C ). Gonozooid extended, flattened or slightly convex. Ooeciostome circular, urceolate, located close to autozooid, but separated, usually frontally directed ( Fig. 3B - D ). Frontal surface covered by pseudopores ( Fig. 3C, D ).

Remarks. Korean specimens accord well with Chinese ones in terms of the arrangement and size of autozooids, position and shape of ooeciostome, and shape of gonozooid (Liu in Liu et al., 2001; Liu et al., 2019).

Two species, N. pulcherrimoidea and N. rugatata found in this study show the obvious difference in the shape of the ooeciostome. The former has oval, elongate and transverse slit-like ooeciostome, while the latter has rounded and urceolate one. In terms of occurrence of N. rugatata , this species seems to inhabit subtropical to tropical waters.

With the addition of two species in this study, three species of 15 species belonging to the genus Nevianipora worldwide are found from Korean waters. All of three Nevianipora species from Korean waters are only distributed in the South China Sea (http://www.bryozoan.net/cyclos tomata/diaperoeciidae/nevianipora.html - 22 July 2023).

Distribution. Korea (Jejudo Island) and South China Sea.

Figures

Fig. 3. Nevianipora rugatata Liu in Liu, Yin & Ma, 2001. A, B, General view showing arrangement of autozooids and cross bar between branches(arrow); C, Ooeciostome, autozooids and pores in B; D, Detailed ooeciostome. Scale bars:A, B=1 mm; C=300 μm; D =100 μm.