lacuna, Helcogramma Williams [J. T.] & Howe [J. C.] 2003:165, Figs. 13-14 [aqua, Journal of Ichthyology and Aquatic Biology v. 7 (no. 4); ref. 27249] Similan Island, Goh Huyong, Thailand, Andaman Sea, 8°29'N, 97°39'E, depth 1-4 meters. Holotype: USNM 222902. Paratypes: BMNH 1983.3.25.1107 (1), USNM 329750 (2), WAM P.26507-016 (2). Type catalog: Moore et al. 2008:41 [ref. 30117]. •Valid as Helcogramma lacuna Williams & Howe 2003 -- (Fricke 2009:49 [ref. 30394], Imamura 2009:244 [ref. 30434], Patzner et al. 2009:447 [ref. 30396], Allen & Erdmann 2012:775 [ref. 31980], Fricke & Erdmann 2017:41 [ref. 35190]). Current status: Valid as Helcogramma lacuna Williams & Howe 2003. Tripterygiidae: Tripterygiinae. Distribution: Eastern Indian Ocean: East Andaman Sea coast of Thailand. Habitat: marine.