Deep-sea Caprellidea (Crustacea, Amphipoda) from Azores with the description of three new species Author Guerra-García, José M. Laboratorio de Biología Marina, Departamento de Fisiología y Zoología, Facultad de Biología, Universidad de Sevilla, Avda Reina Mercedes 6, E- 41012 Sevilla (Spain) jmguerra @ us. es. jmguerra@us.es text Zoosystema 2004 26 2 235 262 journal article 10.5281/zenodo.5393370 1638-9387 5393370 KEY TO THE WORLD SPECIES OF PROTOAEGINELLA LAUBITZ & MILLS, 1972 1. Abdomen with two pairs of abdominal appendages. Basis of the male gnathopod 2 with abundant tubercles................................................................ P. verrucosa n. sp. — Abdomen with a pair of abdominal appendages. Basis of the male gnathopod 2 without tubercles.................................................................................................... 2 2. Abdomen five-segmented, with minute appendages. Body densely tuberculate.......... .............................................................................................................. P. muricata — Abdomen less than five-segmented, with appendages well developed, those of the male with several large apical teeth. Body smooth or with sparse tubercles.............. 3 3. Abdomen three- to four-segmented. Abdominal appendages of the male with nine to 10 apical teeth. Body smooth................................................................ P. spinipoda — Abdomen two-segmented. Abdominal appendages of the male with three to five apical teeth. Body with tubercles............................................ P. paraspinipoda n. sp.