Abstract:

To understand the species composition and faunal characteristics of Coccinellidae insects and provide reference for the protection of Coccinellidae insect species diversity and biological control of pests in Shaanxi Province, the Coccinellidae insects were investigated and the fauna of these species were preliminarily analyzed. A total of 113 species belonging to 42 genera and 8 subfamilies were identified, which included 7 newly recorded species from Shaanxi Province. Within the zoogeographic regions of the world, the Oriental realm exhibits the highest diversity in terms of genera and species, with 41 genera and 107 species. The Palaearctic realm follows, which includes 35 genera and 78 species. The Neotropical realm, however, demonstrates the lowest diversity, comprising only 7 genera and 9 species. Within the zoogeographic regions of China, the Central China region exhibits the highest diversity in terms of genera and species, comprising 41 genera and 108 species. The Northern China region ranks second, include 32 genera and 71 species. In contrast, the Qinghai-Xizang region demonstrates the lowest diversity, with only 14 genera and 22 species. The trans-regional type within the Oriental realm exhibits the highest species richness and a diverse array of fauna types. At both the genus and species levels, it is predominantly distributed across the Palaearctic-Oriental realms, with limited connections to the other four realms. The trans-regional type within the Central China region have the highest species richness and a diverse array of fauna types. The Central China region and the Northern China region display the highest diversity at both the genus and species levels, with stronger connections to the Southwest China region, and relatively limited connections to other realms. In summary, the species of Coccinellidae in Shaanxi Province are situated in the transition zone from the Palaearctic to Oriental realms, and are dominated by species in Northern China and Central China. This study reveals the species diversity and transitional characteristics of the fauna of Coccinellidae insects in Shaanxi Province, providing essential background data for the cataloging of insect diversity, conservation and utilization of natural enemy insect resources.

Key words: Coccinellidae, Shaanxi Province, species composition, fauna, distribution pattern, species diversity