Crepidacantha longiseta Canu and Bassler, 1928

Dick, Matthew H., Tilbrook, Kevin J. & Mawatari, Shunsuke F., 2006, Diversity and taxonomy of rocky-intertidal Bryozoa on the Island of Hawaii, USA, Journal of Natural History 40 (38 - 40), pp. 2197-2257 : 2239-2240

Crepidacantha longiseta Canu and Bassler, 1928

( Figure 13G, H )

Crepidacantha longiseta Canu and Bassler 1928, p 135 , Plate 21, Figures 3 , 4 . Crepidacantha longiseta: Gordon 1984, p 113 , Plate 44C; Tilbrook et al. 2001, p 92,

Figure 16B .

Measurements

ZL, 0.40–0.53 (0.461¡0.048). ZW, 0.33–0.43 (0.368¡0.030). OrL, 0.09–0.11 (0.102¡0.007). OrW, 0.08–0.09 (0.084¡0.005). OvL, 0.15–0.20 (0.178¡0.022). OvW, 0.18–0.23 (0.203¡0.019) (ovicell n 55).

Description

Colony unilaminar, encrusting, light tan to off-white in colour. Frontal wall finely tuberculate, imperforate, with small, scarcely evident marginal pores. Primary orifice ( Figure 13G ) constricted laterally by obliquely triangular condylar processes; proximal margin straight. Oral spines lacking. Peristome proximal to orifice slightly developed as a thick, crescent-shaped ridge with a slight umbo in midline. A pair of avicularia lies lateral to orifice, both pointing proximally with long-setose mandibles; zooids with numerous long, spinous processes ( Figure 13H ) around zooidal margin. Ovicell ( Figure 13G ) raised, globose, smooth, slightly ridged in midline, with a double row of small pores in a crescent near distal end.

Distribution

Putatively circumtropical; Brazil, Caribbean, Mauritius, Vanuatu, and western Indian Ocean ( Tilbrook et al. 2001). This is the first record for the Hawaiian Islands.

Superfamily CELLEPOROIDEA Johnston, 1838 Family PHIDOLOPORIDAE Gabb and Horn, 1862

Figures

Figure 3. (A–C) Alderina flaventa n. sp., holotype (NHM 2006.7.21.1): (A) group of autozooids and ovicellate zooids; (B) ovicellate zooid; (C) colony margin showing uniporous septula. (D) Parellisina albida (Hincks): autozooids, ovicellate zooid, and interzooidal avicularia. All specimens bleached. Scale bars: 500 Mm (A, C, D); 400 Mm (B).

Figure 4. Corbulella extenuata n. sp., holotype (NHM 2006.7.21.5): (A) autozooid, unbleached; (B) marginal zooids, bleached; note cap-like reduced ovicells; (C) autozooids and interzooidal avicularium (centre), bleached; (D) lateral wall of marginal autozooid showing septula, bleached. (B–D) are from same colony as (A), after bleaching. Scale bars: 500 Mm (A, C, D); 400 Mm (B).

Figure 13. (A–C) Cribellopora souleorum n. sp., paratype 1 (NHM 2006.7.21.20): (A) autozooids and ovicellate zooids; note predation hole in ovicell at right and scars on both ovicells; (B) enlargement of orifice; (C) ancestrula (lower right) and three periancestrular zooids; note predation holes in frontal walls of two zooids. (D, E) Nimba

Figure 16. Disporella compta n. sp., holotype (NHM 2006.7.21.22): (A) partial view of colony, showing one elongate and two oval maculae among seven maculae present in colony; (B) enlargement of a macula; (C) columns of fused peristomes of three to four autozooids; (D) enlargement of kenozooidal opening showing palm-tree-shaped pinhead spinules. All specimens bleached. Scale bars: 2 mm (A); 1 mm (B); 400 Mm (C); 50 Mm (D).