ERGA-BGE reference genome of Leviellus thorelli, a common orb-weaving spider representing the Zygiellidae familyGregorič, Matjaž (Avtor) Bužan, Elena (Avtor) Böhne, Astrid (Avtor) Monteiro, Rita (Avtor) Fernández, Rosa (Avtor) Escudero, Nuria (Avtor) Gut, Marta (Avtor) Aguilera, Laura (Avtor) Câmara Ferreira, Francisco (Avtor) Cruz, Fernando (Avtor) Gómez-Garrido, Jèssica (Avtor) Alioto, Tyler S. (Avtor) Bortoluzzi, Chiara (Avtor) The Leviellus thorelli reference genome provides the first high-quality genomic resource for Zygiellidae, a family of orb-weaving spiders with a dynamic systematic history and distinct for constructing webs with a characteristic spiral-free sector. As part of the European Reference Genome Atlas (ERGA), we generated a chromosome-level assembly for L. thorelli that is organized into 13 contiguous chromosomal pseudomolecules. This chromosome-level assembly encompasses 2.20 Gb and is composed of 939 contigs and 130 scaffolds, with contig and scaffold N50 values of 5.4 Mb and 167.1 Mb, respectively. This genome represents a valuable addition to the growing collection of spider genomes. With Zygiellidae now included among the available genomes of true orb-weavers, this is a key resource for comparative studies into the genomic basis of orb web and silk evolution.20262026-03-24 15:31:28Neznano28590sl© 2026 Gregorič M et al.