The former represented early veliger larvae and the latter mature umbonate
larvae with a definitive provinculum (Le Pennec 1978) nearing metamorphosis.
cucullata Temperature ([degrees]C) 28 [+ or -] 1 28 29 Salinity ([per thousand]) 36 32-34 Time APM Time APM D-stage 18 hpf 67 20 hpf 65 Early umbonate
7 dph 96 7 dph 90 Umbonate
10 dph 112 11 dph 140 Eye spot 16 dph 175 26 dph -- Pediveliger 18 dph 250 26 dph 300 Authors This study Kalyanasundaram and Ramamoorthi (1987) S.
& Nannf., another species from northern hemisphere, presents umbonate
pileus, with abundant velar remnants on margin and producing a floccose annulus; microscopically, it has similar shape and size of the basidiospores and pleurocystidia.
Organisms Cultural characteristics Gram Motility reaction Pseudomonas Mucoid colonies with Negative + species umbonate
elevation rod Micrococcus Circular, pinhead colonies positive -- species which are convex with cocci entire margins.
One characteristic that seems to be specific to Striostrea prismatica larvae is the appearance of a red spot toward the ventral border of the late umbonate
Morphology of Colony Isolate Form Color Elevation Margin BKS-1 Circular Whitish Convex Entire BKS-8 Circular Cream Convex Undulate BGR-7 Circular Cream Convex Undulate CMS-4 Circular Cream whitish Pulvinate Undulate JBR1-3 Circular Cream Umbonate
Undulate JBR2-16 Irregular Whitish Umbilicate Entire Morphology of Colony Shape Gram Isolate Density Diameter (mm) of Cell Staining BKS-1 Translucent 1-2 Short-rod Negative BKS-8 Opaque 1-4 Rod Positive BGR-7 Opaque 1-4 Rod Positive CMS-4 Opaque 0.5-2 Rod Positive JBR1-3 Opaque 1-4 Rod Positive JBR2-16 Opaque 3-5 Rod Positive Table 4: Sequences analysis results of 16S rRNA genes using BLAST-N program.
Pileus 6 cm across, fleshy, broadly convex, brittle, slightly umbonate
to obtuse, fibrillose; fibrils brown, pyramidal, larger and denser in the centre, while lighter in colour toward margins, brown scales on white ground; margins entire; context white, soft and up to 0.5 cm thick at disc and thin towards margins.
Five-day-old larvae, which become oval in shape, were slightly umbonate
, with a length ranging from 201.6-221.8 [micro]m.
By 8-days-old, the majority had developed into umbonate
Growth of D-veliger, umbonate
and pediveliger larvae was also significantly affected by salinity (P < 0.001) and temperature, as was the growth of spat.
yessoensis, the time recommended for the installation of collectors to correspond with peak collection is when 50% of umbonate
larvae exceed 200 [micro]m in size (Ventilla 1980).