Anisops bouvieri Kirkaldy, 1904

Nieser, Nico, 2004, Guide To Aquatic Heteroptera Of Singapore And Peninsular Malaysia Iii. Pleidae And Notonectidae, Raffles Bulletin of Zoology 52 (1), pp. 79-96 : 85

Anisops bouvieri Kirkaldy, 1904

Anisops bouvieri Kirkaldy, 1904 ; Brooks, 1951 (redescription); Fernando & Cheng, 1974; Fernando & Leong 1976.

Diagnosis. – Males are distinguished by the long cephalic projection ( Fig. 13 ). Length, male 6.0-6.3, female 5.7-6.0; greatest width, male 1.5-1.8, female 1.7-1.8. Width of head about 0.9 times the humeral width of pronotum.

Male. In dorsal view the head has a rather long cephalic projection with an acute apex; in lateral view extending about half the total length of the frons anteriorly of eyes ( Fig. 13 ). Synthlipsis narrow, 0.20-0.25 times the anterior width of vertex. Tylus medially deeply excavated, the lateral rims also grooved, these grooves running upward to the apex of the cephalic projection. Labrum with three narrow tufts of hairs, one at each basal angle and one at the apex; rostral prong slightly shorter than third rostral segment, originating in the proximal third of third rostral segment ( Fig. 13 ). Forefemur narrowed at apex. Stridulatory comb on foretibia with about 12 teeth, which become shorter towards apex; distally of the stridulatory comb four to five normal (not clavate) bristles. Female. In dorsal view the head is rounded anteriorly with the vertex very slightly produced. Tylus somewhat swollen. Labrum with some short hairs, not united into tufts as in the male. Synthlipsis wide, about half the anterior width of the vertex. Females are very similar to those of A. kuroiwae which occasionally have been found in the same locality.

Brachypterous form not known.

Distribution. – A widespread species recorded from India through SE Asia to China and in New Guinea. Fernando & Cheng (1974) and Fernando & Leong (1976) recorded it from Melaka, Johor and Singapore. I have seen one more sample each from Johor and Singapore in ZRC.

Figures

Figs. 12-17. Anisops male, head in lateral view. 12 A. barbatus; 13 A. bouvieri; 14 A.tahitiensis; 15 A.kuroiwae; 16 A. exiguus; 17 A. lansburyi. p = rostral prong; t = tylus.