Parellisina latirostris Osburn, 1940

Judith L Winston, 2016, Bryozoa of Floridan Oculina reefs, Zootaxa 4071 (1), pp. 1-81 : 16

Parellisina latirostris Osburn, 1940

( Fig. 6 ; Table 5 )

Parellisina latirostris Osburn, 1940: 361 , pl. 4, figs 33, 34; Lagaaij 1963a: 175, pl. 8, fig. 3; Long & Rucker 1970: 19; Banta & Carson 1977: 388, fig. 2E, G; Winston 1982: 123, fig. 35; 1984: 9, fig. 15.

Material examined. VMNH no. 70603; USNM no. 1283231.

Description. Colonies encrusting ( Fig. 6 A). Zooids more or less oval, with transparent frontal membrane underlain by narrow beaded cryptocyst. Gymnocyst smooth-textured, narrow distally and laterally, more extensive proximally, sloping to zooid margins ( Fig. 6 B). Recently formed zooids with small orificial spines. Aviculariumkenozooid complex similar in size to autozooids, kenozooidal opesia large, covered by membrane, the proximal avicularium with figure-eight shaped foramen, tiny acute pivots and spatulate rostrum with a broad palatal shelf ( Fig. 6 E). Ooecium prominent, with tubercular surface calcification, small relative to zooid size ( Fig. 6 C, D).

Remarks. Living colonies have dark-green polypides with pale orange tentacles and orange embryos.

Distribution. Tropical western Atlantic. Cape Hatteras to Florida, Gulf of Mexico, and Caribbean.

Figures

FIGURE 6. Parellisina latirostris Osburn, 1940: A, colony encrusting depression in substratum; B, group of autozooids; C, group of zooids, some with ooecia, and an avicularium; D, close-up of ooecium showing opening; E, close-up of the avicularium and associated kenozooid. Scale bars: A, 1 mm; B, C, 0.5 mm; D, 0.1 mm; E, 0.2 mm.

Tables

TABLE 5. Measurements in mm of Parellisina latirostris Osburn, 1940.

	Lz	Wz	Lop	Wop	Lo	Wo	Lov	Wov	Lav	Wav
N	18	18	18	18	2	3	11	11	7	7
Mean	0.528	0.344	0.407	0.297	0.054	0.120	0.141	0.200	0.509	0.407
SD	0.045	0.051	0.054	0.037	0.000	0.010	0.011	0.020	0.034	0.054
Min	0.450	0.234	0.270	0.234	0.054	0.108	0.126	0.162	0.450	0.270
Max	0.612	0.432	0.522	0.360	0.054	0.126	0.162	0.234	0.558	0.522