Parasmittina indiginella, Judith L Winston, 2016

Judith L Winston, 2016, Bryozoa of Floridan Oculina reefs, Zootaxa 4071 (1), pp. 1-81 : 47-49

Parasmittina indiginella sp. nov.

( Fig. 26 ; Table 25 )

Material examined. Holotype: VMNH no. 70639. Paratype: USNM no. 1283252.

Etymology. Latin, indiginus, born in a country, native, plus the diminutive suffix - ella, i.e. the little native Parasmittina .

Diagnosis. Parasmittina with a low broad lyrula, 5–6 orificial spines, an ooecium with a larger inner area with scattered, raised pores, a narrow outer layer, and one or two triangular frontal avicularia, oriented toward the orifice peristome.

Description. Colony encrusting ( Fig. 26 A). Zooids rectangular to oval in shape with a thickly calcified lowridged frontal shield. Small, but closely spaced marginal areolae forming a double row of pores ( Fig. 26 C). Primary orifice with low, broad lyrula, almost occupying entire proximal rim; rounded lateral and distal rim smooth ( Fig. 26 D). Secondary orifice raised on low peristome ( Fig. 26 C); distal part of peristome bearing 5–6 jointed hollow spines; proximal half with U-shaped pseudosinus ( Fig. 26 D). One or two elongate triangular avicularia near zooid margins, angled toward peristome. Ooecia globular, embedded, with narrow imperforate ectooecium and large entooecium with scattered raised pseudopores ( Fig. 26 B, C).

Remarks. This species is similar to species of Parkermavella , except for the presence of a lyrula. It is similar in size and morphology to the Barbadian species Parkermavella salebrosa Winston & Woollacott, 2009 , which, however, lacks a lyrula, has more orificial spines (6–7) and small oval avicularia.

Distribution. Florida, Oculina banks.

Figures

FIGURE 26. Parasmittina indigenella sp. nov.: A, portion of colony; B, several zooids with ooecia; C, close-up of distal end of zooid showing avicularia, peristome and oecium; D, close-up of orifice showing bases of six orificial spines; E, primary orifice with broad, low lyrula; F, avicularium with solid cross bar. Scale bars: A, 1 mm; B, 0.5 mm; C, D, 0.1 mm; E, 0.2 mm; F, 0.05 mm.

Tables

TABLE 25. Measurements in mm of Parasmittina indiginella sp. nov.

	Lz	Wz	Lo	Wo	Lov	Wov
N	18	18	18	18	16	16
Mean	0.488	0.326	0.086	0.088	0.194	0.242
SD	0.056	0.039	0.007	0.007	0.018	0.015
Min	0.378	0.270	0.072	0.072	0.162	0.216
Max	0.558	0.414	0.099	0.099	0.234	0.270