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Fig. 2 | BMC Ecology and Evolution

Fig. 2

From: Evolutionary pattern of karyotypes and meiosis in pholcid spiders (Araneae: Pholcidae): implications for reconstructing chromosome evolution of araneomorph spiders

Fig. 2

Arteminae, male karyotypes, stained by Giemsa. Based on two sister metaphases II except for Artema nephilit (single metaphase II) and Holocneminus (spermatogonial metaphase). a Artema nephilit, haploid karyotype. Chromosomes metacentric except for five submetacentric (nos. 2, 8, 10–12), one subtelocentric (no. 13), and one acrocentric element (no. 15). The Y chromosome is from another metaphase II. Morphology of the Y chromosome is unresolved; b Wugigarra sp. Karyotype metacentric except for one subtelocentric pair (no. 7). Inset: magnified Y chromosome (from another metaphase II). Note metacentric morphology of this element; c Chisosa diluta. Chromosomes exclusively metacentric. The positively heteropycnotic X chromosome is the longest chromosome; d Holocneminus sp. Chromosomes metacentric except for one submetacentric (no. 4) and one subtelocentric pair (no. 3). Centromeres marked by arrowheads; e Physocyclus dugesi. Chromosomes metacentric except for two submetacentric (nos 2, 5) and two subtelocentric pairs (nos 6, 7). The positively heteropycnotic X chromosome is the longest chromosome of the karyotype. Bar = 10 µm

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BMC Ecology and Evolution

ISSN: 2730-7182

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