Spiders represent one of the most studied arachnid orders. They are particularly intriguing from a cytogenetic point of view, due to their complex and dynamic sex chromosome determination systems. Despite intensive research on this group, cytogenetic data from African spiders are still mostly lacking. In this study, we describe the karyotypes of 38 species of spiders belonging to 16 entelegyne families from South Africa and Namibia. In the majority of analysed families, the observed chromosome numbers and morphology (mainly acrocentric) did not deviate from the family-level cytogenetic characteristics based on material from other continents: Tetragnathidae (2n♂ = 24), Ctenidae and Oxyopidae (2n♂ = 28), Sparassidae (2n♂ = 42), Gnaphosidae, Trachelidae and Trochanteriidae (2n♂ = 22), and Salticidae (2n♂ = 28). On the other hand, we identified interspecific variability within Hersiliidae (2n♂ = 33 and 35), Oecobiidae (2n♂ = 19 and 25), Selenopidae (2n♂ = 26 and 29) and Theridiidae (2n♂ = 21 and 22). We examined the karyotypes of Ammoxenidae and Gallieniellidae for the first time. Their diploid counts (2n♂ = 22) correspond to the superfamily Gnaphosoidea and support their placement in this lineage. On the other hand, the karyotypes of Prodidominae (2n♂ = 28 and 29) contrast with all other Gnaphosoidea. Similarly, the unusually high diploid number in Borboropactus sp. (2n♂ = 28) within the otherwise cytogenetically uniform family Thomisidae (mainly 2n♂ = 21–24) supports molecular data suggesting a basal position of the genus in the family. The implementation of FISH methods for visualisation of rDNA clusters facilitated the detection of complex dynamics of numbers of these loci. We identified up to five loci of the 18S rDNA clusters in our samples. Three different sex chromosome systems (X0, X1X20 and X1X2X30) were also detected among the studied taxa.
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Comparative Cytogenetics
卷
14
期
1
页码
107
- 138
ISSN
1993-078X | 1993-0771
ISSN
1096-0031
The chromosome study in the spermatogenesis of two lynx-spiders (Oxyopidae).
卷
3
页码
95
- 107
Studies on the chromosomes and the sex-determining mechanism in four hunting spiders (Sparassidae).
卷
5
页码
51
- 70
A study of the chromosomes during meiosis in twenty-two species of Indian spiders.
卷
11
页码
69
- 108
Cytological studies on six species of spiders from Taiwan (Araneae: Theridiidae, Psechridae, Uloboridae, Oxyopidae, and Ctenidae).
卷
38
页码
423
- 434
Arachnida.
页码
296
- 318
Chromosome number and sex-determining system in fifty-two species of spiders from North-East India.
卷
35
页码
6
- 8
页码
1158 pp
ISSN
1601-5223
Atlas of phylogenetic data for entelegyne spiders (Araneae: Araneomorphae: Entelegynae) with comments on their phylogeny.
卷
56
页码
1
- 324
Chromosomenstudien an Araneen mit besonderer berücksichtigung der geschlechtschromosomen.
卷
54
页码
1
- 101
页码
336 pp
ISSN
1601-5223
Cheiramiona, a new Afrotropical spider genus (Araneae: Miturgidae: Eutichurinae).
卷
15
页码
29
- 44
页码
713 pp
Chromosome number, sex mechanism and genome size in 27 species of Indian spiders.
卷
43
页码
11
- 13
Cytogenetical investigations on spiders of semi-arid areas.
卷
3
页码
40
- 54
Study of chromosomes in spiders from Orissa.
卷
8
页码
71
- 76
Cytological studies on the Indian spiders IV. Chromosome complement and meiosis in Selenops radiatus Latreille (Selenopidae) and Leucauge decorata (Blackwall) (Tetragnathidae) with special reference to XXX0-type of male sex determining mechanism. Research Bulletin (N.S.
卷
10
页码
73
- 80
ISSN
1420-9101
Chromosome number and sex-determining mechanism in forty-seven species of Indian spiders.
卷
41
页码
23
- 26
ISSN
1601-5223
Sex determination and karyotypes in spiders.
卷
59
页码
31
- 32
页码
75 pp
The new spider (Araneae) family Borboropactidae from the tropics and fossil in Baltic amber.
卷
3
页码
1737
- 1746
Preliminary studies on the chromosome of four species of spiders.
卷
2
页码
110
- 113
出版者
Pensoft Publishers
其它主题
Rta clade; Araneoidea; Oecobioidea; Acrocentric; Nor; Rdna fish; Gnaphosoidea
语言
英语
类型
Research Article
2024-10-18
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