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The ultrastructural characters of the mature spermatozoon of O pechona bacillaris (Molin, 1859) ( D igenea, L epocreadiidae) a parasite of Scomber colias G melin, 1789 ( S combridae) off the coast of D akar ( S enegal)
Author(s) -
Ndiaye Papa I.,
Bakhoum Abdoulaye J. S.,
Sène Aminata,
Diagne Papa M.,
Miquel Jordi
Publication year - 2015
Publication title -
acta zoologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.414
H-Index - 37
eISSN - 1463-6395
pISSN - 0001-7272
DOI - 10.1111/azo.12054
Subject(s) - spermatozoon , biology , ultrastructure , mitochondrion , microbiology and biotechnology , axoneme , anatomy , biochemistry , flagellum , gene
This study presents the ultrastructure of the mature spermatozoon of Opechona bacillaris, a digenean belonging to the family Lepocreadiidae. The sperm cell of O. bacillaris exhibits the general pattern described in most of the Lepocreadioidea: two axonemes of the 9 + ‘1’ pattern of the Trepaxonemata, mitochondria, a cortical mitochondrion, a nucleus, electron‐dense material in the anterior extremity of the spermatozoon, external ornamentation of the plasma membrane with associated spinelike bodies, and granules of glycogen. However, particularities of O. bacillaris are the simultaneous presence in the anterior extremity of the spermatozoon of the electron‐dense material, a mitochondrion, and the absence of cortical microtubules. In the Lepocreadiidae, we describe for the first time in O. bacillaris spinelike bodies associated with the external ornamentation of the plasma membrane and two mitochondria. The first mitochondrion is moniliform and composed of a mitochondrial cord with joined mitochondrial bulges. The second mitochondrion shows a regular form. The posterior tip of the spermatozoon has only singlets to owing to the disorganization of the second axoneme and granules of glycogen as occurs in Hypocreadium caputvadum , the other studied species of the family Lepocreadiidae.