| Resumo: |
The deep-sea bottom samples from the flat of Cap Vert, tropical Atlantic Ocean, collected during the EUMELI cruises, contain eight demoscolecid species, six of them belong to the subgenus <i>Quadricoma</i>. The dominant species <i>Tricoma (Quadricoma) maxima</i> is rediscribed including SEM information on the head region. A new species <i>Tricoma (Quadricoma) magnafenestra</i> sp. nov. is characterised by a relative long body with 44 main rings, an end ring with large pores or phasmata and spike-like spinneret, a broad head with truncated anterior end with labial rim, males with 55µm long spicules. Additional information is given on <i>T. (Q.) loricata</i>. The taxonomic status of <i>T. (Q.) media</i> is discussed; the species is considered as a <i>species inquirenda</i>.
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