Gymnura van Hasselt, 1823

Ebert, David A., White, William T., Ho, Hsuan-Ching, Last, Peter R., Nakaya, Kazuhiro, Séret, Bernard, Straube, Nicolas, Naylor, Gavin J. P. & De Carvalho, Marcelo R., 2013, An annotated checklist of the chondrichthyans of Taiwan, Zootaxa 3752 (1), pp. 279-386 : 364-365

Genus Gymnura van Hasselt, 1823

Butterfly Rays / Ȃẽé

Gymnura van Hasselt, 1823: 316 . Type species: Raja micrura Bloch & Schneider, 1801 , by monotypy.

Gymnura japonica ( Temminck & Schlegel, 1850)

Japanese Butterfly Ray / ƂÂȂẽ

Pteroplatea japonica Temminck & Schlegel, 1850: 309 , pl. 141. Lectotype: RMNH D2479 (stuffed) ; Paralectotypes: RMNH D2478 , D2480–2481 , D2484 , 4252a–c , ZMB 4650 , Nagasaki Bay , Japan .

Local synonymy: Gymnura japonica: Chen & Chung, 1971: 42 , fig. 26; Chen & Yu, 1986: 161; Shen, 1988: Chen & Joung, 1993: 87, fig. 2; Chen, 2004: 25; Shen & Wu, 2011: 103, fig.

Taiwan voucher material: THUP 01251 , 293.5 mm DW from Keelung (in Chen & Chung, 1971) ; NTUM 00035 , (4 spec.) Ma-gong ; NTUM 00052 , Ma-gong ; NTUM 01702 , Da-xi (in Shen, 1988). No additional specimens were observed during the 2012 survey .

Remarks: Gymnura bimaculata is frequently seen in the Taiwanese literature, but Ishihara et al. (2009) and Shen et al. (2012) examined the issue and concluded that G. bimaculata is a junior synonym of G. japonica .

Conservation status: Data Deficient.

Gymnura zonura ( Bleeker, 1852)

Zonetail Butterfly Ray / ÃȂẽ

Aetoplatea zonurus Bleeker, 1852: 79 . Holotype: BMNH 1867.11 .28.163, Jakarta, Java, Indonesia.

Local synonymy: Aetoplatea zonura: Chen & Chung, 1971: 41 , fig. 25 (NTUM 858, 346 mm DW, Kaohsiung); Chen & Yu, 1986: 161; Shen, 1988: 6 (NTUM 6676, Hsin-Da Port; Chen & Joung, 1993: 87, fig. 10; Shao et al., 2008: 237; Shen & Wu, 2011: 103, fig.

Taiwan voucher material: (5 spec.) CAS 235432 , juvenile male 462 mm DW, Da-xi, 24 May 2005 ; UF 159292, male 657 mm DW, Da-xi, 25 May 2005 ; NMMB-P HO-065 (tissue accession GN9952 ), adult male 724 mm DW; AMNH 258301 (tissue accession GN9953 ), adult male 546 mm DW, MNHN 2013-0461 (tissue accession GN9954 ), adult male, 555 mm DW, Da-xi, 13 Mar 2012 .

Remarks: Commonly landed in fish markets. DAE and WTW observed this species during previous surveys in 1988 and 2005.

Conservation status: Vulnerable.