A New Diploid Number and Sex Chromosome System for the Family Hersiliidae from the Mediterranean Region of Turkey

Kumbıçak, Ümit; Kumbıçak, Zübeyde; Huseynli, Gülnare

doi:10.17582/journal.pjz/2018.50.1.131.134

Cited by 1 publication

(2 citation statements)

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“…The karyotype of H. sericea differed from its congener H. savignyi Lucas, 1836 (Bole-Gowda 1958) by the higher 2n and an additional X chromosome. On the other hand, the same karyotype formula was found in Hersiliola bayrami Danişman, Sancak, Erdek & Coşar, 2012(Kumbıçak et al 2018. This discrepancy reflects rather higher dynamics in the karyotypes of hersiliids, as seen in Neotama Baehr & Baehr, 1993 (this study), as well as in other members of the family (Forman et al in prep.…”

Section: Hersiliidae Thorell 1870supporting

confidence: 77%

“…In comparison to other Entelegynae families, Oecobioidea karyotypes represented a dynamic system. Hersiliidae, despite limited data availability for only four species (Bole-Gowda 1958, Kumbıçak et al 2018, displayed three different diploid counts. Interestingly, Oecobiidae showed the highest diversity in 2n among Entelegynae families, approaching both upper and lower ranges of Entelegynae diploid number (or fundamental number, respectively), ranging from 2n♂ = 19, X0 (this study) to 2n♂ = 42, X 1 X 2 0 (Suzuki 1950).…”

Section: General Trends Of Entelegyne Karyotype Evolutionmentioning

confidence: 99%

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Cytogenetics of entelegyne spiders (Arachnida, Araneae) from southern Africa

Šťáhlavský

Forman

Just

et al. 2020

CCG

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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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Section: Hersiliidae Thorell 1870supporting

confidence: 77%

Section: General Trends Of Entelegyne Karyotype Evolutionmentioning

confidence: 99%