Amphiglena gracilis, Capa & Rouse, 2007

Capa, Maria & Rouse, Greg W., 2007, Phylogenetic relationships within Amphiglena Claparède, 1864 (Polychaeta: Sabellidae), description of five new species from Australia, a new species from Japan, and comments on previously described species, Journal of Natural History 41 (5 - 8), pp. 327-356 : 352

Key to the Australian and Japanese species of Amphiglena

1. Four to six pairs of pinnules, proximal ones reaching the tip of radioles.................. A. gracilis sp. nov.

– Six to 10 pairs of pinnules............... 2

– Ten to 15 pairs of pinnules............... 3

– Fifteen to 20 pairs of pinnules.............. 5

2(1). Short thoracic uncini handles. Ventral basal flanges continuing to peristomium................... A. nishii sp. nov.

– Medium thoracic uncini handles. Ventral basal flanges continuing to peristomium.............. A. maiteae sp. nov.

– Long thoracic uncini with long handles and narrow breasts. Ventral basal flanges reaching the junction of crown and body...... A. terebro

3(1). Short thoracic uncini handles.......... A. lenae sp. nov.

– Medium thoracic uncini handles.............. 4

4(3). Ventral basal flanges reach posteriorly to the junction of crown and thorax.................. A. magna sp. nov.

– Ventral basal flanges continue posteriorly to peristomium. A. bondi sp. nov.

5(1). Thoracic uncini with medium length handles and broad breast; abdominal uncini with short handles and broad breast...... A. magna sp. nov.

– Thoracic uncini with long handles and narrow breast; abdominal uncini with long handles and narrow breast........... A. pacifica