Dulichiella

Alves, Jessika, Johnsson, Rodrigo & Senna, André R., 2014, A new species of the genus Dulichiella Stout, 1912 (Crustacea: Amphipoda: Melitidae) from Pecém Harbor, Ceará state, Brazil, Zootaxa 3889 (2), pp. 289-300 : 299

Key to species (males) of Dulichiella of the world (modified from Lowry & Springthorpe, 2007)

1. Gnathopod 2 propodus distolateral crown with 2 spines...................................................... 2

- Gnathopod 2 propodus distolateral crown with more than 2 spines............................................... 3

2. Antenna 1 peduncular article 1 with 4 robust setae along posterior margin. Pereopods 3–7 dactylar ungues with 1 accessory spine. Epimeron 3 with smooth posterior margin................................................ Dulichiella cotesi

- Antenna 1 peduncular article 1 with 3 robust setae along posterior margin. Pereopods 3–7 dactylar ungues with 2 accessory spines. Epimeron 3 with minutely serrate posterior margin...................................... Dulichiella tomioka

3. Gnathopod 2 propodus with 3 spines...................................................................... 4

- Gnathopod 2 propodus with 4 spines......................................................................9

4. Epimeron 3 posterior margin serrate distally................................................................. 5

- Epimeron 3 posterior margin smooth......................................................................6

5. Gnathopod 1 coxa anteroventral margin produced, anterior margin concave........................ Dulichiella anisochir

- Gnathopod 1 coxa anteroventral margin not produced, anterior margin straight or slightly convex......... Dulichiella tulear

6. Gnathopod 2 propodus distolateral crown with acute spines.................................... Dulichiella terminos

- Gnathopod 2 propodus distolateral crown with rounded spines................................................. 7

7. Pereopods 3–7 dactylar ungues with 1 accessory spine on anterior margin......................................... 8

- Pereopods 3–7 dactylar ungues with 2 accessory spines on anterior margin.......................... Dulichiella oahu

8. Pleonites 1–2 each with 7 dorsal spines. Pereopods 6–7 merus to propodus with bunches of long slender setae................................................................................................ Dulichiella australis

- Pleonites 1–2 each with 9 dorsal spines. Pereopods 6–7 merus to propodus without bunches of long slender setae.............................................................................................. Dulichiella spinosa

9. Pleonites 1–3 with sparse dorsal setae.................................................................... 10

- Pleonites 1–3 with dense dorsal setae....................................................... Dulichiella guinea

10. Pereopods 3–7 dactylar ungues with 2 accessory spines on anterior margin........................................ 11

- Pereopods 3–7 dactylar ungues with 1 accessory spines on anterior margin....................................... 16

11. Pereopods 6–7 basis, merus to propodus with bunches of long slender setae...................................... 12

- Pereopods 6–7 without bunches of long slender setae on basis and merus........................................ 13

12. Male gnathopod 1 coxa with anterior margin concave..................................... Dulichiella appendiculata

- Male gnathopod 1 coxa with anterior margin straight....................................... Dulichiella pattaniensis

13. Acessory flagellum 5-articulate..................................................... Dulichiella ankeri sp. nov.

- Accessory flagellum with 4-articulate.....................................................................14

14. Urosomite 3 with 4 dorsal spines.......................................................... Dulichiella celestun

- Urosomite 3 with 2 dorsal spines........................................................................ 15

15. Fourth spine of gnathopod 2 propodus distolateral crown well developed.......................... Dulichiella takedai

- Fourth spine of gnathopod 2 propodus distolateral crown not well developed..................... Dulichiella cuvettensis

16. Head with apically truncated lateral cephalic lobe........................................................... 17

- Head with apically rounded lateral cephalic lobe.............................................. Dulichiella lecroyae

17. Pereopod 6 basis posterior margin straight (straight in female).................................... Dulichiella fresnelii

- Pereopod 6 basis posterior margin concave (strongly subsigmoid in female)........................ Dulichiella pacifica