Drilonereis

Zanol, Joana & Ruta, Christine, 2015, New and previously known species of Oenonidae (Polychaeta: Annelida) from Lizard Island, Great Barrier Reef, Australia, Zootaxa 4019 (1), pp. 745-772 : 770

Key to species of Drilonereis recorded from the Australian coast*:

1 MxI basally smooth.................................................. D. quadrioculata Hartmann-Schröder, 1979

– MxI basally dentate, teeth conspicuous or inconspicuous ( Figs 7 F, 8K)........................................... 2

2. (1) Mandible absent............................................................... D. cf. logani Crossland, 1924

– Mandible present, reduced.............................................................................. 3

3. (2) Single plate mandible similar to an upside down heart of spade......................... D. australiensis Augener, 1922

– Two plate subtriangular mandible, round anterior end, plates diverging posteriorly ( Fig. 8 F)............ D. orensanzi n. sp.

Figures

FIGURE 7. Drilonereis cf. logani Crossland, 1924. A. Whole body of live specimen in host; B. Anterior end, dorsal view; C. Anterior end, ventral view; D. Anterior end, lateral view; E. Maxillae and carriers, MxI, ventral and dorsal carriers broke during mounting, arrow at beginning of the furcula; F. Maxillae, MxI broke during mounting, G. Left parapodium 135; H. Chaeta acicular spine, left parapodium 135. A – H, AM W. 44971.

FIGURE 8. Drilonereis orensanzi n. sp. A. Whole body of live specimen; B. Anterior end, dorsal view, arrow to median groove; C. Anterior end, ventral view, arrow to median groove; D. Anterior end, lateral view; E. Posterior end, dorsal view; F. Mandibles, ventral view; G. Maxillae and carriers, dorsal view, arrow at beginning of the furcula; H. MxI and II, dorsal view, rectangle highlights region magnified in K; I. Right MxIII and MxIV, ventral view; J. Left MxIII; K. Base of MxI, detail of inconspicuous teeth; L. Right parapodium 34; M. Right parapodium 149, arrow to chaeta acicular spine. A – D, W. 44797; E – H, K – N, AM W. 44913; I – J, AM W. 44923.