A review of the taxonomy of spiny-backed orb-weaving spiders of the subfamily Gasteracanthinae (Araneae, Araneidae) in Thailand Author Macharoenboon, Kongkit Animal Systematics and Molecular Ecology Laboratory, Department of Biology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand Author Siriwut, Warut Animal Systematics and Molecular Ecology Laboratory, Department of Biology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand Author Jeratthitikul, Ekgachai https://orcid.org/0000-0002-3477-9548 Animal Systematics and Molecular Ecology Laboratory, Department of Biology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand ekgachai.jer@mahidol.edu text ZooKeys 2021 2021-04-16 1032 17 62 http://dx.doi.org/10.3897/zookeys.1032.62001 journal article http://dx.doi.org/10.3897/zookeys.1032.62001 1313-2970-1032-17 EBF7586A9EF748FEBFB53D8F1E372120 7E7EE68D2DB65E1680CC7E33B36AEC74 Gasteracantha rubrospinis Guerin , 1838 Gasteracantha rubrospinis Guerin , 1838: 53. Type locality: Waigiou [Waigeo Island]. Gasteracantha rubrospinis Full list of synonyms and usage of the name available in World Spider Catalog (2020) . Remarks. The abdomen of Gasteracantha rubrospinis is wider than long. This species can be distinguished from other Thai Gasteracantha by characteristics of their spines and the color pattern on the dorsal abdomen. The abdomen is bright yellow, with a large and incomplete horizontal black transverse band near the anterior edge. The abdominal spines are wider at the base, tapered toward the tip, and ending with a sharp point ( Guerin 1838 ; Simon 1877 ; Pocock 1897 ). The reported specimens of G. rubrospinis from Thailand belong to Pocock's collection ( Pocock 1897 ). The locality was listed as "Patani" [= Pattani Province], the southernmost province of Thailand. No specimens were obtained in this study. Distribution and habitat. Indonesia (Moluccas, Sulawesi, Lombok), New Caledonia, Guam, Thailand (Pattani Province) ( Pocock 1897 ; World Spider Catalog 2020 ).