Deutella, Mayer, 1890

GUERRA-GARCÍA, J. M., 2003, Revision of the genus Deutella (Crustacea: Amphipoda: Caprellidea) with description of a new species, redescription of Deutella venenosa Mayer, 1890 and a key to the species of Deutella, Journal of Natural History 37 (9), pp. 1059-1084 : 1081

Key to the species of Deutella

The following key is based on examination of type and non-type male specimens. The species key provided is meant as an easy field guide to be used without dissection.

1 Body with dorsal projections................ 2

– Body dorsally smooth................. 6

2 Dorsal projections on head to pereonite 4. Pereopods 3 and 4 generally one-articulate............... Deutella venenosa (figures 11–15)

– Pereonites 3 and 4 without dorsal projections. Pereopods 3 and 4 two-articulate.. 3

3 Dorsal projections only on head........ Deutella vemae (figure 10)

– Dorsal projections on head to pereonite 2............ 4

4 Pereopod 5 abnormal, dactylus extremely reduced. Antennae densely setose..................... Deutella aspiducha (figure 1)

– Pereopod 5 not reduced. Antennae not setose........... 5

5 Propodus of gnathopod 2 widened distally, profusely setose. Pereopods 3 and 4, one- sixth as long as gills.......... Deutella californica (figure 2)

– Propodus of gnathopod 2 not widened distally, scarcely setose. Pereopods 3 and 4, one-third as long as gills.......... Deutella incerta (figure 3)

6 Propodus of gnathopod 2 with a triangular projection proximally........................ Deutella mayeri (figure 8)

– Propodus of gnathopod 2 with a rectangular projection proximally..... 7

7 Body elongate. Antenna 1 scarcely setose. Pereopods 3 and 4 about half as long as gills............... Deutella margaritae (figures 4–7)

– Body not elongate. Antenna 1 setose. Pereopod 3 and 4 about one-quarter as long as gills............... Deutella schieckei (figure 9)