2.5−3.7 mm long (mean = 2.9 mm; n = 5); 2.06−2.27 times as long as wide. This species can be distinguished by the presence of three spines on each elytral margin, with the largest spine near the declivitalsummit.
throughout the tropical regions of Africa and Asia to New Guinea, Australia, the Solomon Islands and Samoa; recorded in the study region from Cambodia, China (Yunnan), India (Andaman Is, Assam, Maharashtra, Sikkim, Tamil Nadu, West Bengal), Laos, Myanmar, Taiwan, Thailand, Vietnam
Following Bousquet (2018), we date the original description of the species to 1800 rather than the usually cited 1795.
Eccoptopterus spinosus is a morphologically variable species and represents a species complex that will require a more detailed investigation to address. COI sequences from specimens collected from Ghana, Papua New Guinea, Indonesia (Java), Taiwan, and Vietnam differed from 12−18% between sites, and CAD varied by 2−7% (Cognato et al. 2020).