Anisops lansburyi Leong, 1963

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 : 87

Anisops lansburyi Leong, 1963

Anisops lansburyi Leong, 1963 ; Fernando & Cheng, 1974; Fernando & Leong, 1976.

Diagnosis. – Generally a pale, small, broadly fusiform species with its maximum width at the level of the apex of scutellum. Length, male 4.5-5.6, female 4.6-5.9; width, male 1.1-1.4, female 1.1-1.5. Width of head 0.93 times to almost equal to the humeral width of pronotum and about six times the anterior width of vertex.

Male. In dorsal view the head is rounded with anterior margin truncate and vertex very slightly indented. Synthlipsis narrow, one tenth to one seventh the anterior width of vertex. Rostral prong longer than third rostral segment, originating near its apex ( Fig. 17 ). Tylus somewhat swollen, smoothly convex. Tylus and labrum with a few short scattered hairs. Forefemur narrowed at apex. Tibial comb with eight to nine rather large teeth of subequal length and one or two very small teeth at its apex ( Fig. 21 ).

Female. Except for the sexual characteristics females of this species are very similar to males. They are on average slightly larger and the synthlipsis is slightly wider than in males: one seventh to one fourth the anterior width of vertex.

Brachypterous form unknown.

Remarks. – See under A. exiguus and A. niveus .

Distribution. – Described from the Malay Peninsula (Melaka and Singapore, Leong 1963; Fernando & Cheng, 1974; Fernando & Leong, 1976). I have seen only one additional male from Singapore (ZRC.6.9393-9396) 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.

Figs. 21-23. Anisops, male, stridular comb. 21 A. lansburyi; 22 A. nigrolineatus; 23 A. tahitiensis.