Polypedilum ( Tripodura ) lineatum Chaudhuri, Guha and Dasgupta, 1981

Polypedilum ( Tripodura) lineatum Chaudhuri, Guha and Dasgupta, 1981 View in CoL

GenBank accession number: MN637873 View Materials

Polypedilum ( Tripodura) rectangulum Hazra, Sanyal and Brahma, 2015: 13 View in CoL ; Hazra, Niitsuma and Chaudhuri, 2016: 94. Syn. n.

Materials examined: 1 male labelled ‘ Holotype Polypedilum ( Tripodura) rectangulum Hazra, Sanyal and Brahma ( BUENTD 275 ), India, Assam, Guwahati (26.14, 91.73), 20.xii.2012, Coll. K. Sanyal’ ; 1 male labelled ‘ Paratype, Polypedilum ( Tripodura) rectangulum Hazra, Sanyal and Brahma , India, Sikkim, Dentam (27.25, 88.13), 12.iv.2015, Coll. K. Sanyal’ ; 1 male labelled ‘ Holotype Polypedilum lineatum Guha and Chaudhuri , India, West Bengal, Burdwan, Raniganj (23.62, 87.11), 28.x.1977, Coll. D.K. Guha’ ; 1 male labelled ‘ Polypedilum lineatum India, West Bengal, Alipurduar, Falakata (26.51, 89.20), 26.v.2019, Coll. K. Sow’ .

Male (n=4)

Hypopygium ( Figure 7A View FIGURES 7 ). Anal point 40–50 long, narrowly deflexed. Gonocoxite 40–80 long; gonostylus 120130 long; superior volsella 27 long, rectangular; inferior volsella 65–68 long with 2 long and 8 incurved setae.

Remarks. The type specimen of Polypedilum ( T.) rectangulum is found to have identical pattern of wing spots and hypopygium with P. ( T.) lineatum but superior volsella is little different in shape. So, P. ( T.) rectangulum is a junior synonym of P. ( T.) lineatum . The COX1 sequence of P. ( T.) lineatum had ~3% divergence ( Figure 7B View FIGURES 7 ) with the sequences in the data bases from Guanxi, China which is within the barcode gap for the species belonging to subgenus Tripodura ( Song et al. 2016) . Comparing the sequence of COX1 and uploaded image in BOLD data system, the species may appear to be distributed also in the Oriental China.

Distribution and ecology. India: West Bengal, Sikkim, Assam; China: Guanxi. The specimens from India were collected from places near rivers. The distribution indicates that the species have probably dispersed through eastern syntaxial bend of the Himalayas ( Assam Gateway).