| Brevicirrosyllis ancori | San Martin & Hutchings, 2006 | 8 × 0.2/ 50 | Triangular, longer than prostomium | Slightly anteriorly to eyes, as long as palps | Posterior to eyes, longer than palps + prostomium, smooth | No inclusions; smooth, short, papilliform; absent on chaetiger 2 | Slightly shorter than dorsal cirri; parapodial glands from proventricle, granular material | 4/ 3 | Bidentate, teeth similar in size | 33–8 /20–10 | From mid to posterior parapodia, truncated | Only on posterior parapodia; bidentate, subdistal tooth larger than distal one, with translucent hood | 5/ 2.5 (30) | From 9 to 244 m deep. Associated with encrusting algae and sponges | Pacific Ocean: Australia (Queensland, Western Australia, northern New South Wales) |
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| Brevicirrosyllis gorringensis | Hartmann-Schröder, 1977 | 1.5 × 0.22 / 25 | Broad, subtriangular, as long as prostomium | On anterior margin of prostomium, slightly longer than palps | On posterior margin of prostomium, slightly longer than palps + prostomium, rugose | No inclusions; smooth, as long as or slightly shorter than median antenna; present on chaetiger 2 | Shorter than dorsal cirri; no parapodial glands | 8/ 4 | Bidentate, distal tooth larger | Small gradation in length (from drawings) | From midbody parapodia, long, straight, acute | Only on posterior parapodia; bidentate, subdistal tooth larger than distal one | 4.5/ 4 (30) | 72 m deep. From dredges | Only known from type locality. Atlantic Ocean: Gorringe Bank |
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| Brevicirrosyllis paulolanai sp. nov. | This paper | 7 × 0.17 /47 (without posterior most segments) | Triangular, about same length of prostomium | Slightly anteriorly to eyes, about same length of palps | Posterior to eyes; three times longer than palps + prostomium, basally smooth, distal half rugose | No inclusions; ~ ½–¾ length of median antenna, smooth; absent on chaetiger 2 | Shorter than dorsal cirri; no parapodial glands | 4–5/ 3 | Bidentate, distal tooth slightly larger than subdistal one throughout | 27–10 /15–7 | From midbody, truncated | Not observed | 2.5–3 / 2.5 (32–30) | Subtidal zones, 18–21 m deep | Only known from type locality. Atlantic Ocean: Brazil (Trindade Island) |
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| Brevicirrosyllis mariae | San Martin & Hutchings (2006) | 7 × 0.3/ 54 | Triangular, longer than prostomium | Slightly anteriorly to eyes, as long as palps | Between posterior eyes, about same length of palps + prostomium | Fibrillar inclusions; from chaetiger 1 pseudoarticulated distally, as long as median antenna; absent on chaetiger 2 | Slightly longer than dorsal cirri; parapodial glands from midbody | 5 / 3–4 | Bidentate, distal tooth larger anteriorly, teeth about same size towards posterior body | 27–12 throughout | From midbody parapodia, truncated | From mid to posterior parapodia; bidentate, subdistal tooth larger than distal one, with translucent hood | 4 /3–4 (30–36) | Subtidal to 244 m deep.Associated with incrusting communities and sand | Pacific Ocean: Australia (Queensland, New South Wales) |
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| Brevicirrosyllis mayteae | San Martin & Hutchings (2006) | 5.4 × 0.2/ 44 | Broad, stout, shorter than prostomium | Slightly anteriorly to eyes, as long as palps + prostomium | Near posterior margin, about, about same length of palps + prostomium | No inclusions; from chaetiger 1 smooth, as long as median antenna; absent on chaetiger 2 | Slightly shorter than dorsal cirri; parapodial glands from midbody, granular material | 5 / 4 | Bidentate, distal teeth similar in size | 16–8 / 10–7 | From mid to posterior parapodia, long, straight, acute, with minute subdistal spines on margin | Only on posterior parapodia, bidentate, teeth at 90°, subdistal tooth larger than distal one with translucent hood | 5/ 5 (20) | Subtidal to 30 m deep. Associated with Lithothamnion sp. and Halimeda sp. | Pacific Ocean: Australia (Queensland) |
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| Brevicirrosyllis weismanni | Hartmann-Schröder, 1977 | 18 × 0.5 /96 | Broad, subtriangular, slightly longer than prostomium | Slightly anteriorly to eyes, as long as prostomium + palps | Between posterior eyes; almost three times longer than lateral ones, pseudoarticulated anteriorly | Fibrillar inclusions; smooth, slightly shorter or about same length as median antenna; present on chaetiger 2 | Slightly shorter than dorsal cirri; no parapodial glands | +4/ 4 | Bidentate, distal tooth slightly larger | 25–20 /– | From anterior parapodia, truncated | Form proventricle or only on posterior parapodia, bidentate, subdistal tooth larger than distal one, with translucent hood | 5/ 3 (30) | From intertidal to 200 m deep. Associated with vermetids, coralline substrates and in rocky and Peyssonelia sp. bottoms | Atlantic Ocean: Mediterranean Sea, Brittany, Madeira Island, Gulf of Mexico, and Cuba. Pacific Ocean: Hawaii Islands |
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