Spider (Arachnida, Araneae) fauna of the lowland part of the Balkhash-Alakol basin (SE Kazakhstan). Part 2: IZRK collection data

The spider (Araneae) records from the lowland and foothill arid parts of the Balkhash-Alakol Basin.The territories of Almaty city and Talgar settlement (excluding their mountainous areas above 950 m a.s.l.) are also included, as they contain a significant number of records. The dataset contains original data recently collected by the staff of the Institute of Zoology of the Republic of Kazakhstan.The IZRK collection dataset includes 543 occurrences, collected and identified mainly during 2023–2025, with additional material from 2019–2022 also included. Almost all identifications were carried out primarily to the species level.