Amphiarius rugispinis (Valenciennes, 1840)

(fig. 8)

Arius rugispinis ^ZBK Valenciennes in Cuvier & Valenciennes, 1840b: 77. Type locality: Cayenne, French Guiana. Syntypes: MNHN A-9403.

Tachysurus atroplumbeus ^ZBK Fowler, 1931: 394, fig. 2. Type locality: Vessigny Beach, Brighton, Trinidad Island, West Indies. Holotype: ANSP 53316.

Distribution: North and Eastern South America.

Countries: Trinidad Island, Guyana, Surinam, French Guiana and Brazil.

Habitat: Marine and brackish waters.

Maximum size: 450 mm TL.

Material examined: FMNH 52852 (4 al, 292-410 mm TL), Guyana, Georgetown market; MZUSP 87695 (1 c&s), Brazil, Maranhão, ilha de São Luís, estreito de Coqueiro ; MZUSP 25170 (1 al), Brazil, Pará, Vigia .