FIGURE 6 in A new species of Synotaxus and the first chromosomal study on Synotaxidae, presenting a rare XY sex chromosome system in spiders (Araneae, Araneoidea)

FIGURE 6. Chromosomes of Synotaxus jaraguari n. sp., male. A–C, Giemsa stained. D, Silver nitrate impregnation. A–B, Diplotenes, with 11 autosomal bivalents + XY, showing the achiasmatic association between X and Y (A, photo and inset) and its early segregation (B). C, Metaphase II with n = 12. D, Spermatogonial metaphase, with 2n♂ = 24, highlighting the Nucleolar Organizer Regions (arrows). Scale bar, 5 µm.