Himantura chaophraya Monkolprasit & Roberts, 1990 KUMF 2998 Holotype
sex: female
length: 780 mm TL
date vessel station: 31.05.1989
location: Chao Phraya at Ayutthaya (about 100 km upriver from mouth of Chao Phraya into Gulf of Thailand), Kittipong Jarutanin
FAO-area: 04
specimens: 1
Himantura chaophraya Monkolprasit & Roberts, 1990 KUMF 2999 Paratype
sex: male
length: 1070 mm TL
date vessel station: 09.11.1987
location: Mae Nam Nan at Pichit (460 km upriver from Gulf of Thailand), Boonyeon Chokekiri
FAO-area: 04
specimens: 1
Himantura chaophraya Monkolprasit & Roberts, 1990 KUMF 3000 Paratype
sex: female
length: 1920 mm TL
date vessel station: 14.06.1988
location: Mae Nam Nan at Chumsang (60 km upriver from Nakorn Sawan and 360 km from Gulf of Thailand), Sophorn Virasettakul
FAO-area: 04
specimens: 1