Euthalia merta

 Euthalia merta, the dark-male baron, is a butterfly of the family Nymphalidae (Limenitidinae). It is found in the Indomalayan realm. It is a large butterfly with forewings with an angular apex and concave outer edge and hindwings with an angular anal angle.The wings are beige to brown, marbled.

Subspecies

 * E. m. merta Assam to Peninsular Malaya, Singapore
 * E. m. apicalis (Vollenhoven, 1862) Borneo
 * E. m. pseudomerta Fruhstorfer, 1906 Sumatra
 * E. m. prisca Fruhstorfer, 1913 Bangka
 * E. m. phantasma Fruhstorfer, 1913 Nias
 * E. m. pseuderiphyle Fruhstorfer, 1913
 * E. m. karina Kalis, 1933 Sabang
 * E. m. milleri Pendlebury, 1939 Langkawi Is.
 * E. m. tioma Eliot, 1978 Pulau Tioman
 * E. m. schoenigi Schröder & Treadaway, 1978 Philippines (Negros)