Thailand Spider Data Retrieval System for geographical occurrence and pictorial identification

Data of Thai spiders were extracted from the World Spider Catalog. The geographical occurrence data of spider species in Thailand and pictures of species were compiled. It was based on the internet platform “spiderthailand.info” which allows professional arachnologists and amateur spider lovers to visit for checking geographical distribution of spiders and to quickly access pictures for comparative pictorial identification. The picture dataset contributed a pictorial identification tool for spiders in Thailand. The online platform facilitated quick comparison between voucher specimens identifying and the online pictures. It filled the gap of taking time to check paper by paper after long searching for possible species of Thai spiders from any possible paper pool. Geographical occurrences of Thai spiders were 1419 records belonging to 670 species of 228 genera and 50 families. Among those, 461 species from 133 genera of 41 familie distributed only in Thailand. Around the country of Thailand, 756 geographical positions were reported for spider occurrence. From 76 provinces and one additional special administrative area (Bangkok), 58 provinces showed occurrence records of spiders and 18 provinces showed nonoccurrence records. Those provinces of nonoccurrence records of spiders were Amnat Charoen, Ang Thong, Bueng Kan, Chai Nat, Maha Sarakham, Mukdahan, Nakhon Phanom, Nong Bua Lam Phu, Nonthaburi, Phayao, Phichit, Phra Nakhon Si Ayutthaya, Samut Prakan, Samut Sakhon, Si Sa Ket, Sing Buri, Uthai Thani, and Yasothon. Most spiders were reported from Chiang Mai province.