Isodemis serpentinana (Walker, 1863)

Sun, Yinghui & Li, Houhun, 2011, Review of the genus Isodemis Diakonoff (Lepidoptera, Tortricidae) from China, with description of three new species, ZooKeys 77, pp. 51-64 : 58

Isodemis serpentinana (Walker, 1863)

Batodes serpentinana Walker 1863: 317. Type locality: Indonesia.

(Tortrix?) sulana Walker 1866: 1784. Type locality: New Guinea.

Cacoecia serpentinana (Walker, 1863): Meyrick 1912: 18.

Tortrix serpentinana (Walker, 1863): Meyrick 1921: 149.

Syndemis serpentinana (Walker, 1863): Diakonoff 1941: 41.

Isodemis serpentinana (Walker, 1863): Diakonoff 1952: 147.

Distribution.

China (Hainan, Yunnan, Taiwan); India, Indonesia (Borneo, Java, Sumatra), New Guinea, Philippine, Sri Lanka, Tailand.

Notes.

Based on the description of Isodemis serpentinana and the illustration of its male genitalia provided by Diakonoff (1941), this species is distinguished by the phallus bearing two unequal cornuti with the longer one undulate in the male genitalia. When Diakonoff (1983) described Isodemis stenotera , hepointed out that Isodemis stenotera was very similar to Isodemis serpentinana superficially, but could be separated by the male genitalia having two cornuti equal in length. By checking the holotype deposited in the Natural History Museum, London, we also found that the subapical blotch in Isodemis serpentinana is subtriangular, while it is narrowly semioval in Isodemis stenotera . More differences of the two species are stated under Isodemis stenotera .