CLANIS BILINEATA FORMOSANA Gehlen, 1941 -- Two-lined velvet hawkmoth, Soyabean Hawkmoth

Female Clanis bilineata formosana. Photo: © NHMUK Male Clanis bilineata formosana. Photo: © NHMUK

TAXONOMY

Clanis bilineata formosana Gehlen, 1941, Ent. Z., Frankf. a.M. 55: 178. Type locality: Formosa [Taiwan].

Note. As this is quite a variable species with regard to wing patterning and DNA barcodes, with these having no apparent habitus or geographical correlation, Eitschberger, 2004, Neue ent. Nachr. 58: 79-80 synonymized all subspecies with the nominotypical subspecies. However, reinstated as a subspecies of Clanis bilineata by Heppner, 2012, Lepid. Novae 5: 32, who asserted that 'The subspecies concept is that they are merely geographic labels for disjunct populations of a single species and need no specific morphological differences to be established as such. Each population surely has some differences, but geographic isolation should be the only criterion in using subspecies names'. There is no scientific justification for such a subspecies definition and it is therefore rejected. Resynonymized with the nominotypical subspecies by Kitching and Rougerie et al., 2018, Biodivers. Data J. 6: e22236.


ADULT DESCRIPTION AND VARIATION

Resting Clanis bilineata formosana, Taiwan. Photo: © Felix Lin.

ADULT BIOLOGY


FLIGHT-TIME

Taiwan: iii-iv (Hualien Hsien); iii-v (Kaohsiung Hsien); v (Pingtung Hsien); vi (Kaohsiung Hsien); vii (Pingtung Hsien); ix (Pingtung Hsien).


EARLY STAGES

OVUM:

LARVA:

PUPA:

Larval hostplants. On Pueraria montana var. lobata in Taiwan (ShiPher Wu, pers. comm. 2012). Also Callerya nitida, Callerya reticulata, Pongamia pinnata [syn. Millettia pinnata], Mucuna macrocarpa and Ormosia formosana.


PARASITOIDS


LOCAL DISTRIBUTION

Taiwan: Nantou Hsien (Puli); Pingtung Hsien (Kenting); Kaohsiung Hsien (Shanping, 640m; Liukuei); Taipei (Shikanshuei; Jingmei); Taipei Hsien (Hsintien); Hualien Hsien (Taroko National Park).


GLOBAL DISTRIBUTION

Endemic to Taiwan.


Global distribution of Clanis bilineata formosana. Map: © NHMUK.

BIOGEOGRAPHICAL AFFILIATION



Return to Sphingidae of the Eastern Palaearctic species list
© A.R. Pittaway & I.J. Kitching (The Natural History Museum, London)