Skip to main content


Fig. 4 | Parasites & Vectors

Fig. 4

From: How to become a successful invasive tapeworm: a case study of abandoned sexuality and exceptional chromosome diversification in the triploid carp parasite Atractolytocestus huronensis Anthony, 1958 (Caryophyllidea: Lytocestidae)

Fig. 4

Aberrant meiotic division of spermatocytes of Atractolytocestus huronensis. Giemsa staining. a Pachytene with bivalents and univalents. b, c Early (b) and late (c) diplotene showing a synapsed trivalent, associations of bivalents, and several univalents. d, e Early (d) and late (e) diakinesis showing a trivalent, bivalents and univalents in each cell. f Late metaphase-early anaphase I; early segregation of univalent chromosomes to opposite poles while bivalents dwell in the cell centre. g Late anaphase I. h Late metaphase II. i Early anaphase II with splitting chromatids. j Early telophase II: a cluster of four aberrant spermatid nuclei. Scale-bar: 10 µm

Back to article page