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 Author GUERRA-GARCÍA, J. M. text Journal of Natural History 2003 2003-05-31 37 9 1059 1084 http://www.tandfonline.com/doi/abs/10.1080/00222930110104267 journal article 10.1080/00222930110104267 1464-5262 5274415 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)