Description and genome sequencing of Olios ishikawatodaorum n. sp. (Arachnida: Araneae: Sparassidae) from Aichi, Japan
Abstract
A new species of Olios, O. ishikawatodaorum n. sp. (♀♂) is described from Aichi Prefecture,
Japan, with its annotated genome sequence. The assembled genome spans 3.7Gbp with contig N50 length of
413.4kbp. BUSCO 5 analysis indicates high completeness of the genome (93.8% complete + 3.5% partial =
97.3%), and 22,984 genes have been predicted using RNA-Seq data as evidence. The genome sheds light on
neglected RTA clade spider genomics, and reveals a number of expanded gene families in this species. Fulllength or near-full-length spidroin sequences obtained from the genome showed the conservation of MaSp2
which is typically lost in the RTA clade, but whose presence may explain the unusually high supercontraction
and strain at break in Sparassidae spiders.
Arakawa, Kazuharu & Kato, Nobuo & Tanikawa, Akio. (2025). Description and genome sequencing of Olios ishikawatodaorum n. sp. (Arachnida: Araneae: Sparassidae) from Aichi, Japan. Acta Arachnologica. 74. 1-8.
