Ethusina rowdeni AHYONg, 2008: 29–31, figS 12B, 13C–D, 14F–L [TYpe lOcaliTY: WHakaTaNe SeamOuNT, BaY Of PleNTY, NeW ZealaNd].— Webber et al. 2010: 226.—YaldWYN & Webber 2011: 230.
Material examined. AUSTRALIA: New South Wales: NMV J72625, 1 male (cl 11.2 mm, cw 10.0 mm), E of woolgoolga, 30°05.94–07.68'S, 153°34.36–35.76'E, 1194–1257 m, IN2017_ V03 _080 -176, 5 June 2017.
NEw ZEALAND: NIwA 83192, 1 male (cl 10.9 mm, cw 10.1 mm), white Island Canyon, 37°33.018–33.168'S, 177°17.280–16.950'E, 938– 914 m, beam trawl, TAN1206 /148, 28 April 2012; NIwA 31725, 1 juvenile male (cl 5.6 mm, cw 4.6 mm), Challenger Plateau, 36°55.2402–55.6908'S, 167°31.608–31.260'E, 1216–1222 m, TAN0707 / 52, 30 May 2007.
Remarks. Ethusina rowdeni was previously known only by the male holotype from the southern Kermadec Ridge (whakatane Seamount, Bay of Plenty; 1292–1336 m). The present specimens extend the known bathymetric range and the geographic range westwards to southeastern Australia. The Australian specimen (NMV J72625) is the largest recorded of the species. The gonopods of the juvenile male (NIwA 31725) are incompletely developed; both are elongated but gonopod 2 is as yet separate from, rather than enclosed by gonopod 1.
Distribution. Northern New Zealand from seamounts in the Bay of Plenty, westwards to the Challenger Plateau; for the first time from eastern Australia; 914–1336 m.