Volume : I, Issue : IV, September - 2012

Notes on the genus Angilia Stal, 1865 with the description of a new species from India

V. K. Khandelwal

Abstract :

Angilia Stal, 1865, an important genus of family Veliidae and is is recorded for the first time in India by a new species Angilia( adriennella) bibarb sp.nov.from Mathura, India is described here.

                  The Vellidae are best known of all aquatic hemiptera of the world and are extremely common in Indian waters. The members of the family are easily differentiated from the related family Gerridae based on hind leg not surpassing beyond the tip of abdomen and the presence of median longitudinal groove on vertex. Angilia Stal 1865 belongs to the subfamily Veliinae China and Usinger,1949 of the family Veliidae. The genus Angilia Stal is easily recognized from the members of other genera by the apical part of their forewing having one large irregular white spot surrounded by 2–4 smaller spots. Besides in Angilia, two apical segments of antennae are about as thick as second segment and middle tarsus is about as long as middle tibia.

Material and Methods: Specimens for the present study have been collected from the crevices of holy riverbank of Yamuna and in order to study the specimens, dried specimens were softened in alcohol and macerated in 10% KOH solution to remove the genital capsule and dissected to study the structural details of mouthparts, eyes, antennae, genitalia etc. All drawings were being made from camera lucida. For comparative study, the data collected from World Wide Web. 

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Article: Download PDF   DOI : 10.36106/ijsr  

Cite This Article:

V.K. Khandelwal, Notes on the genus Angilia Stal, 1865 with the description of a new species from India, International Journal of Scientific Research, Vol.I, Issue.IV sep 2012

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