Key to the species in the Aegla paulensis complex

1. Rostrum narrow base triangular-shaped, distinctly curved downward. Anteromesial margin of the third thoracic sternite tapered. Uropods wide. Posterolateral margins of telson slightly concave mesially................. Aegla paulensis s. str.

- Rostrum curved upward distally, straight or nearly deflected downward. Anteromesial margin of the third thoracic sternite truncate or abrupt. Uropods narrow. Posterolateral margins of telson straight or slightly convex mesially................. 2

2. Orbital spines absent.................................................................... Aegla vanini n. sp.

- Orbital spines well developed or rudimentary............................................................... 3

3. Anteromesial margin of the of the third thoracic sternite truncate................................................ 4

- Anteromesial margin of the of the third thoracic abrupt....................................................... 5

4. Subrostral process on proximal half of the subrostral margin................................................... 6

- Subrostral process in median position of the subrostral margin.................................. Aegla jaragua n. sp.

5. Rostrum curved upward distally. Protogastric lobes strongly pronounced without corneous scales. Areola rectangular in shape. Epibranchial area slightly elongated. Chelipeds large, unequal in size.................................. Aegla rosanae

- Rostrum nearly straight. Protogastric lobes poorly pronounced with corneous scales. Areola subrectangular in shape. Epibran- chial area triangular and strongly elongated. Chelipeds small, subequal in size......................... Aegla lancinhas

6. Subrostral process poorly developed, low and lobular in shape. Epibranchial area strongly elongated. Chelipeds large, unequal in size. Palmar crest of both chelipeds entire. Areola subrectangular in shape......................... Aegla japi n. sp.

- Subrostral process well developed, broad triangular. Epibranchial area shortened. Chelipeds small, subequal in size. Palmar crest of both chelipeds jagged. Areola rectangular in shape..................................... Aegla jundiai n. sp.