Anisops kuroiwae Matsumura, 1915

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 : 86-87

Anisops kuroiwae Matsumura, 1915 (new record)

Anisops kuroiwae Matsumura, 1915 .

Anisops batillifrons - Lundblad, 1933; Brooks 1951 (redescription).

Anisops kuroiwai - Miyamoto, 1964 (synonymy, unjustified emendation of name).

Diagnosis. – Males are easily recognized by the structure of the cephalic projection and the frons. Generally a mediumsized, fusiform species with its maximal width just in front of its middle. Length male, 5.6-6.4, female 5.4-6.3; width, male 1.5-1.6, female 1.3-1.8. Head width 0.8-0.9 times the humeral width of pronotum and four to five times the anterior width of vertex. Labrum in both sexes without specialized hairs or bristles.

Male. Cephalic projection in dorsal view with a rounded apex; in lateral view extending less than half the total length of the frons anteriorly of eyes ( Fig. 15 ). In frontal view, tylus and frons are excavate with two carinae on each side of which the inner ones meet in the anterior sixth of the frons ( Fig. 19 ). Synthlipsis about one-fourth or less the anterior width of vertex. Rostral prong subequal to slightly longer than third rostral segment, originating in its proximal third ( Fig. 15 ). Forefemur apically narrowed. Stridulatory comb on foretibia with about 13 teeth, of which the basal six are much longer than the apical seven.

Female. In dorsal view the head is rounded anteriorly. The syntlipsis is slightly less than one third the anterior width of vertex. Tylus flat, not swollen. Females are virtually indistinguishable from those of A. bouvieri , with which this species has sometimes been found together. (See also under A. nasutus ).

Brachypterous form unknown.

Distribution. – A widespread species from India through SE Asia to southern China, Iriomote (off Japan) and the Philippines. In the ZRC there is a sample from Melaka, Batu Berendam (fishponds, 3 Oct.1960, 23 males 36 females). Not recorded from Singapore.

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. 18-20. Anisops male, head in frontal view; 19-20 rostrum removed. 18 A. niveus; 19 A. kuroiwae; 20 A. nasutus. t = tylus.