Key to species of Benthana with males having a lobe on the pleopod 1 exopod

1 Merus of pereopod 7 having a lobe with six setae on the inner proximal margin (Fig. 6A)........ B. (Benthanoscia) olfersii

- Merus of pereopod 7 without a lobe with six setae on the inner proximal margin................................... 2

2 Dentiform protrusion of pleopod 1 exopod with apex bent downwards (Fig. 6 B)........................... B. serrana

- Dentiform protrusion of pleopod 1 exopod with apex straight................................................... 3

3 Dentiform protrusion of pleopod 1 exopod with concave appearance (Fig. 5 A)...................... B. itaipuensis sp. n.

- Dentiform protrusion of pleopod 1 exopod with convex or truncated appearance.................................... 4

4 Outer lateral margin of pleopod 1 exopod with setae (Fig. 6 C)......................................... B. cairensis

- Outer lateral margin of pleopod 1 exopod without setae (Fig. 6 D)....................................... B. taeniata