ostiole

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ostiole

[′äs·tē‚ōl]
(biology)
A small orifice or pore.

ostiole

A small entrance.
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References in periodicals archive ?
Perithecia black, ostiolate, large, subglobose or ovate, 360-450 x 270-350 [micro]m attached to substratum by black rhizoids.
Perithecia black, ostiolate, globose to subglobose or broadly ovate, 170-380 x 180-310 pm, in size.
The genus Thielavia is restricted to Pyrenomycetes characterized by non ostiolate ascomata and ascospores with a simple distinct germ pore although C.