Aphelonecta gavini Lansbury, 1966

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 : 91

Aphelonecta gavini Lansbury, 1966

Aphelonecta gavini Lansbury, 1966 ; Zettel, 1995; Kovac & Yang, 1990.

Diagnosis. – Length male 6.2-6.9 female 6.3-6.9; width male & female 2.1-2.3. Colour in dorsal view, eyes reddish brown, often flecked with black; vertex yellow often tinged with reddish brown; anterior half of pronotum and most of scutellum pale yellowish. Posterior half of pronotum translucent, appearing black due to the underlying black basal part of scutellum. Hind wings black, shining through the translucent hemielytra. Legs yellowish to light brown. In dorsal view, vertex slightly protruding in front of eyes, greatest width of head about three times the anterior width of vertex. Anterior width of vertex twice the synthlipsis. Dorsal margin of pronotal fovea directed straight caudad before turning laterad. Nodal furrow straight, directed dorsad, less than its own length removed from membranal suture.

Remarks. – About the same size as and somewhat similar to Enithares mandalayensis , but darker. The lack of a subapical tooth of the middle femur distinguishes this genus from Enithares .

Distribution. – Continental SE Asia. Recorded from Pahang by Kovac & Yang (1990). A common species in the Malay Peninsula, in ZRC represented in many samples from Johor, Terengganu and one from Singapore (ZRC.6.9392 3A, 30 Oct.1968, 1 female), new record for Singapore. Mainly found in virtually stagnant parts of streams.