Glossocephalus Bovallius, 1887

Zeidler, Wolfgang & Browne, William E., 2023, Another new species of Glossocephalus (Crustacea: Amphipoda: Hyperiidea Oxycephalidae) from the Monterey Bay region, California, USA, Zootaxa 5228 (4), pp. 448-454 : 453

Key to the species of the genus Glossocephalus Bovallius, 1887

1. Eyes occupying most of head surface, except for rostrum...................................................... 2

- Eyes composed of ocelli grouped in crescent-shaped organ restricted to back half of head.................................................................................................... G. rebecae Zeidler & Browne, 2015

2. Eyes bulbous with large crescent-shaped, strongly pigmented photoreceptor fields. Head relatively large, as long as first 5 pereonites combined, with sharp rostrum. Gnathopods with blade-like carpus. Pereopods 3 and 4 shorter than P5. Pereopods 5 and 6 with slender articles.............................................................. G. aurantium sp. nov.

- Eyes not especially bulbous with narrow crescent-shaped photoreceptor fields. Head only as long as first 3.5 pereonites combined, with rounded rostrum. Gnathopods with spoon-shaped carpus. Pereopods 3 and 4 longer than P5, with very slender articles. Pereopods 5 and 6 with relatively broad, paddle-like, articles................. G. milneedwardsi Bovallius, 1887