Cosciniopsis Canu and Bassler, 1927

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 : 2230-2231

Genus Cosciniopsis Canu and Bassler, 1927

Cosciniopsis lonchaea ( Busk, 1884)

( Figure 11B, C )

Lepralia lonchaea Busk 1884, p 146 , Text figure 43.

Cosciniopsis lonchaea: Ryland and Hayward 1992, p 258 , Figure 17b ; Tilbrook et al. 2001, p 87, Figure 17C, D ; Tilbrook 2006, p 239, Figure 52D.

Measurements ZL, 1.13–1.43 (1.243¡0.083). ZW, 0.65–0.93 (0.803¡0.087). OrL, 0.25–0.33

(0.270¡0.025). OrW, 0.23–0.26 (0.248¡0.010). OvL, 0.43–0.50 (0.463¡0.032). OvW, 0.55–0.63 (0.600¡0.035) (ovicell n 54).

Description

Colony unilaminar, encrusting; ectocyst a rich chocolate to sienna colour; zooids large. Frontal wall smoothly tuberculate, covered with minute pores except for area proximal to peristome. Peristome well developed, same texture as frontal wall. Zooids often with a distomedially directed frontal avicularium appressed to peristome on one side, mandible equilateral, acute. Primary orifice ( Figure 11C ) nearly circular, with small, rounded condyles separated by a notch from concave proximal orificial margin. Oral spines lacking. Ovicell ( Figure 11B ) globose, hyperstomial, broader than long, same texture as frontal wall, uniformly perforated by minute pores; secondary orifice of ovicellate zooids roundtriangular in outline.

Remarks

Zooid size is larger than reported for other populations, but otherwise the morphology of Hawaiian specimens is indistinguishable from that of specimens from other populations (e.g. Ryland and Hayward 1992; Tilbrook et al. 2001).

Distribution

Widely distributed in Indo-West Pacific, from Red Sea to Tahiti and Hawaii ( Tilbrook et al. 2001).

Figures

Figure 11. (A) Hippopodina iririkiensis Tilbrook: autozooids and ovicellate zooids. (B, C) Cosciniopsis lonchaea (Busk): (B) autozooids and ovicellate zooids; (C) enlargement showing shapes of primary and secondary orifices. (D, E) Calyptotheca kapaaensis n. sp., holotype (NHM 2006.7.21.15): (D) autozooids; (E) enlargement of primary orifice and suboral avicularium. (F) Cheiloporina haddoni Harmer: autozooids and one ovicellate zooid (upper left). All specimens bleached. Scale bars: 1 mm (A, B, F); 200 Mm (C); 500 Mm (D); 100 Mm (E).

Figure 17. Favosipora adunca n. sp.: (A) paratype 1 (NHM 2006.7.21.25), partial view of colony; (B) paratype 1, enlargement of fused peristomes of autozooids; (C) holotype (NHM 2006.7.21.24), brood chamber; (D) holotype, enlargement of brood chamber, showing oeciostome (top, right of centre); (E) paratype 4 (YPM-38559), detail of brood-chamber formation, showing granulated floor and struts of calcification that will contribute to covering; (F) paratype 4, enlargement of kenozooidal openings. All specimens bleached. Scale bars: 1 mm (A); 200 Mm (B, D, E); 500 Mm (C); 100 Mm (F).