Celleporaria inaudita Tilbrook, Hayward & Gordon, 1991

Asagabaldan, M. A., Bourgougnon, N., Bedoux, G., Kristiana, R., Ayuningrum, D., Widyananto, P. A., Muchlissin, S. I., Magueresse, A., Sabdono, A., Trianto, A. & Sa, O. K. Radja-, 2019, Some Cheilostomata (Bryozoa) from the Java Sea, central Indonesian Archipelago with a description of Pleurocodonellina jeparaensis n. sp. (Smittinidae), Zootaxa 4668 (3), pp. 329-342 : 335-336

Celleporaria inaudita Tilbrook, Hayward & Gordon, 1991

( Figs 2D , 5 A–C; Table 4)

Celleporaria inaudita Tilbrook, Hayward & Gordon, 1991: p. 72 , fig. 13d–f.

Material examined. PPB 02, PPB 03, Stn JP 01-1; TAB 01, TAB 04, TAB 07, TAB 08, TAB 09, Stn JP 01-2.

Description. Colony encrusting, multilaminar ( Fig. 5A ). Autozooids more or less oval, convex, with unclear boundaries. Frontal shield slightly nodular, with 10–12 marginal pores. Primary orifice rather wider than long, Dshaped, proximal margin with somewhat median shallow U-shaped sinus with two short-pointed cusps with variable development. Oral spines absent. Secondary calcification around the primary orifice is low, not obscuring it. Avicularium small, suboral, rostrum elliptical with distal rim weakly denticulate, orientated perpendicular to the orifice ( Fig. 5C ). Vicarious avicularia ( Fig. 5B ) scarce, narrowly spatulate, rostral tip rounded with denticulate distal rim, pivot bar complete. Ovicell a cap-like structure occupying the distal and lateral borders of the orifice; frontal surface flat and membranous, distal portion calcified, nodular.

Remarks. Celleporaria inaudita was common in the studied samples, with 2–5 colonies encountered at different sampling sites, constituting the first record of the species in the Java Sea. It differs from Celleporaria aperta ( Hincks, 1882) in the characters of the primary orifice, with different-sized small cusps, not defining the somewhat regular sinus seen in C. aperta ( Tilbrook et al. 2001) .

Distribution. Celleporaria inaudita was previously found at different localities around Efate Island, Vanuatu ( Tilbrook et al. 2001).

Figures

FIGURE 2. Preserved samples of Recent bryozoans from the Java Sea, Indonesia. A. Licornia ferox (Busk, 1852). B. Poricel- laria ratoniensis Waters, 1887. C. Smittipora cordiformis Harmer, 1926. D. Celleporaria inaudita Tilbrook, Hayward & Gor- don, 1991. E. Pleurocodonellina jeparaensis n. sp. F. Triphyllozoon indivisum Harmer, 1934. Scale bars: A = 3 mm; B = 6 mm; C = 4 mm; D = 3 mm; E =1 mm; F = 4 mm.

FIGURE 5. Celleporaria inaudita Tilbrook, Hayward & Gordon, 1991. A. General aspect of encrusting colony. B. Close-up of autozooids and vicarious avicularium (arrow). C. Close-up of primary orifice showing transverse suboral avicularium with denticulate rostral rim. Scale bars: A = 500 µm; B = 100 µm; C = 50 µm.

Tables

TABLE 4. Measurements (µm) of Celleporaria inaudita (TAB 01). Min. Minimum; Max. Maximum; SE. Standard error; N. Sample size.

	Min	Max	Mean	SE	N
Zooid length	197	289	250	24	15
Zooid width	179	227	204	14	15
Orifice length	45	71	58	7	10
Orifice width	137	188	158	20	10
Suboral avicularium length	51	78	62	6	15
Suboral avicularium width	38	58	50	6	15
Large avicularium length	204	298	232	34	6
Large avicularium width	149	189	165	15	6