Mexamage Fauchald, 1972

Prostomium anteriorly truncated, trilobed. Buccal tentacles smooth. Oral membrane elongate, smooth and folded. Prostomial dorsal glandular ridges present. Branchiae 4 pairs. All branchiae similar, all smooth, none basally flanged. All branchial pairs arranged in a distinctly segmental fashion, branchiae repesented by scars only. Paleae on segment 3 absent. Dorsal crest absent. Nuchal (post branchial) hooks on segment 4 absent. Notopodia all similar. Notochaetae all smooth, present from segment 4. Notopodia present on segments 2 and 3, but no notochaetae. Neuropodia present. Segments 3–6 without neurochaetae. Number of pairs of thoracic uncinigers 11. Abdominal notopodial rudiments present. Anal cirri present or absent, 1 pair or 2 pairs.

Description generated from: Hutchings, PA & Johnson, RT, 2003. Australian Ampharetidae (Polychaeta) DELTA database. In Wilson RS, Hutchings PA & Glasby CJ (eds) Polychaetes: Interactive Identification and Information Retrieval. CSIRO Publishing, Melbourne.

Additional references:
Fauchald, K. 1972. Benthic polychaetous annelids from deep water off Western Mexico and adjacent areas in the Eastern Pacific Ocean. Allan Hancock Monographs in Marine Biology 7, 1-575.;
Fauchald, K. 1977. The polychaete worms. Definitions and keys to the orders, families and genera. Natural History Museum of Los Angeles County, Science Series 28, 1-188.