umbonate


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Related to umbonate: punctiform

umbonate

(ŭm′bə-nāt′, ŭm-bō′nĭt)
adj.
Having or resembling a knob or knoblike protuberance.
References in periodicals archive ?
The former represented early veliger larvae and the latter mature umbonate larvae with a definitive provinculum (Le Pennec 1978) nearing metamorphosis.
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.
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.
1 cm wide, fleshy, campanulate when young to broadly plano-convex when mature, umbonate, central umbo, orange-brown to pinkish brown, fibrillose; fibrils orange brown, fine, stretches towards margins, uniformly distributed over white ground around orange brown umbo; context white, soft, slightly thick at disc, margins dentate and fragile; remains unchanging on bruising or cut.
By 8-days-old, the majority had developed into umbonate larvae.
glomerata from 1 to 8 days old between key developmental stages: D-veliger to umbonate larvae.
Growth of D-veliger, umbonate and pediveliger larvae was also significantly affected by salinity (P < 0.
Larvae were exposed to combinations of the above salinities and temperatures at the: D-veliger stage (1 day old and retained on 45-[micro]m mesh), umbonate stage (when larvae were retained on 90-[micro]m mesh after approximately 13 days of larval culture), and pediveliger or eyed stage (when larvae were retained on 130-[micro]m mesh after approximately 22 days of larval culture).
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).
The umbo in bivalve larvae refers to a small prominence that develops along the hinge line and gives rise to the term umbonate larvae, that is those larvae that having developed an umbo have lost their earlier straight hinge or D-shaped appearance.