<i>N. henseni</i> (IMAGE) Pensoft Publishers Caption This is a light micrograph comparing males of N. henseni (on left) - specimen from the Grande River (FUR-D), and N. amazonicus (on right) - specimen from Uatumã River, State of Amazonas, Brazil. Credit Gilmar Perbiche-Neves Usage Restrictions CC-BY 4.0 License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.