Calxattus is a genus of spiders in the family Salticidae.
Distribution Calxattus is endemic to China.
Etymology The genus name is a combination of Latin calx "limestone" and the typical salticid genus ending "-attus", referring to the karst rock surface habitat where the genus is found.
Species , this genus includes two species:
Calxattus dengba Ni, Yu & Zhang, 2025 – China Calxattus serratus (Yang, W. Liu, P. Liu & Peng, 2017) – China
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