perforatorium


Also found in: Medical.

perforatorium

[‚pər·fə·rə′tȯr·ē·əm]
(cell and molecular biology)
acrosome
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References in periodicals archive ?
The transition between the basal part of the perforatorium and the anterior part of the nucleus was visible (approximately 25 nm).
Ultrastructural characteristics of spermiogenesis in Rhynchophorus ferrugineus (Coleoptera: Curculionidae)
En esta etapa se extruye en forma explosiva el perforatorium que se encuentra en el interior del tubo acrosomico formando una estructura filiforme en medio de la abertura anterior del acrosoma, el filamento acrosomico.
Modification of the spermatic structure of the crab Cancer setosus (Molina, 1782) (Decapoda: Brachyura) during induced acrosomal reaction/Modificacion de la estructura espermatica de la jaiba Cancer setosus (Molina, 1782) (Decapoda: Brachyura) durante su reaccion acrosomal inducida
Kristensen (1991) listed for this clade the following putative synapomorphies: maxillary lacinia elongate and slender, detached from stipes; postclypeus enlarged; reduced number of tarsomeres (three or less); cerci absent; at most six Malpighian tubules; abdominal ganglia fused in one mass; gonangulum in the females fused with tergum nine (Scudder 1961); and sperm acrosome without perforatorium (Jamieson et al.
Sistematica de Hemiptera
Rather, in all members of Chitonida the permanent needlelike nuclear filament has replaced the perforatorium (Buckland-Nicks et al.
Fertilization in Callochiton castaneus (Mollusca)
Neither a distinct perforatorium rod nor filamentous structures are detected within the subacrosomal material.
Fine structure of spermatozoa of the hagfish Eptatretus burgeri (Agnatha)

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