Fig. 12
Smeringopinae, males, detection of NORs (FISH). Arrowhead = NOR-bearing chromosome (a, c, d, h) or bivalent (a, b, e–g, i), open arrowhead = sex chromosome-linked NOR, X = X chromosome, Xs = X chromosomes. a Holocnemus hispanicus (X0), metaphase I, the largest bivalent and one end of the X chromosome bear a terminal NOR (see scheme of X chromosome, red = NOR); b H. pluchei (X0), metaphase I (separated by a line from a diffuse stage), two bivalents containing a terminal chiasma have a NOR in chiasma region; c Hoplopholcus forskali (X1X20), plate formed by two fused sister prometaphases II. Sex chromosomes form a cluster having a very low condensation. Chromosomes of one pair bear NOR. Inset: NOR-bearing chromosome from another metaphase II. This chromosome exhibits metacentric morphology and terminal location of NOR; d H. labyrinthi (X1X20), mitotic metaphase. Chromosomes of one pair bear terminal NOR; e Smeringopus atomarius (X1X20), metaphase I, note two bivalents with NOR; f S. pallidus (X1X2X30), two bivalents with NOR. Note scheme of sex chromosome association; g, h Smeringopus sp. (X1X20), g metaphase I, four bivalents include NOR. h Mitotic metaphase, seven chromosomes show a terminal NOR; i Stygopholcus skotophilus (X0), metaphase I, one large bivalent bears a terminal NOR. Bar = 5 µm, inset 1 µm