Levensteiniella, Pettibone, 1985

Wu, Xuwen & Xu, Kuidong, 2018, Levensteiniella manusensis sp. nov., a new polychaete species (Annelida: Polynoidae) from deep-sea hydrothermal vents in the Manus Back-Arc Basin, Western Pacific, Zootaxa 4388 (1), pp. 102-110 : 108-109

Key to species of Levensteiniella mainly based on males

1 A single pair of ventral papillae on segment 11.............................................................. 2

- Two pairs of ventral papillae on segments 11 and 12.......................................................... 3

2 Ventral papillae distally dichotomous; elytra with oval micropapillae on surface; notochaetae smooth or serrated with widely spaced spines along curved side................................................................ L. intermedia

- Ventral papillae without dichotomous branch; elytra smooth on surface; notochaetae with scales along curved side.... L. iris

3 Ventral papillae distally dichotomous on segment 11......................................... L. manusensis sp. nov.

- Ventral papillae tapering without dichotomous branch......................................................... 4

4 Elytra smooth with large median longitudinal fold on surface; notochaetae with series scales along edge; postchaetal lobe well developed on notopodia of elytrophorous segments; jaws with ca. 20 teeth................................. L. plicata

- Elytra with papillae on surface; notochaetae with spines along edge; postchaetal lobe absent on notopodia; jaws without teeth.................................................................................................... 5

5 Elytra delicate with only micropapillae on surface; notochaetae with numerous spinous rows.................. L. kincaidi

- Elytra slightly stiff covered with macro- and micropapillae on surface; notochaetae with distinct and fewer spines along one side.......................................................................................... L. raisae