taxonID	type	description	language	source
137A0A12FFFCFFF90193D741A49EC7C8.taxon	materials_examined	Type speCies Paranaitis wahlbergi (Malmgren, 1865)	en	Oliveira, Verônica Maria De, Jacobsen, Danny Eibye, Lana, Paulo (2018): Four new species of Paranaitis Southern, 1914 (Phyllodocidae, Annelida) from southern and southeastern Brazil. Zootaxa 4444 (2): 120-136, DOI: 10.11646/zootaxa.4444.2.2
137A0A12FFFCFFFD0193D7F3A2CEC376.taxon	materials_examined	Holotype. Paranaguá Bay, Paraná, Brazil, 25 ° 30 ' 41.6 ” S, 48 ° 29 ’ 50.3 ” W, intertidal, Jan. 2010 (ZUEC-POL- 16567). Paratypes. A total of 17 paratypes, ranging from 1 – 43 mm for 26 – 97 segments. Paranaguá Bay shoals, Paraná, Brazil: Guaraguaçu River, 15 Jan. 2009 (1 paratype, NHMD- 207786); 25 ° 33 ’ 031 " S, 48 ° 25 ’ 074 " W, 26 Jan. 2009 (1 paratype, NHMD- 207807); same locality, 27 Jan. 2009 (1 paratype, NHMD- 207816); Caraguaçu River, Paranaguá Bay, 16 Nov. 2009 (1 paratype, NHMD- 207825); 25 ° 33 ’ 031 " S, 48 ° 25 ’ 074 " W, Guaraguaçu river in the Cotinga Channel, 17 Nov. 2009 (1 paratype, NHMD- 207843); 25 ° 30 ' 41.6 ” S, 48 ° 29 ’ 50.3 ” W, Jan. 2010 (1 paratype, ZUEC-POL- 16569). Margin of continental shelf, Campos Basin: Hab 11 C 03 R 3, 22 ° 46 ’ 54.8 ” S, 41 ° 3 ’ 33.6 ” W, 78 m, 22 Feb. 2009 (1 paratype, ZUEC-POL- 16361); Hab 13 H 04 R 2, 21 ° 42 ’ 53.9 ” S, 40 ° 10 ’ 16.2 ” W, 98 m, 9 Mar. 2009 (1 paratype, ZUEC-POL- 16375); Hab 11 E 01 R 1, 22 ° 1 ’ 46.0 ” S, 40 ° 44 ’ 52.5 ” W, 27 m, 26 Feb. 2009 (2 paratypes, ZUEC-POL- 16398); Hab 11 B 02 R 2, 22 ° 37 ’ 35.3 ” S, 41 ° 21 ’ 51.7 ” W, 53 m, 27 Feb. 2009 (1 paratype, ZUEC-POL- 16416); Hab 11 G 04 R 2, 22 ° 4 ’ 14.3 ” S, 40 ° 6 ’ 59.4 ” W, 91 m, 25 Feb. 2009 (1 paratype, ZUEC-POL- 16443); Hab 11 D 01 R 2, 22 ° 6 ’ 42.1 ” S, 40 ° 54 ’ 44.1 ” W, 29 m, 26 Feb. 2009 (2 paratypes, ZUEC-POL- 16447); Hab 16 G 05 R 2, 22 ° 6 ’ 10.6 ” S, 40 ° 3 ’ 6.3 ” W, 149 m, 7 Jul. 2009 (1 paratype, ZUEC-POL- 16459); Hab 11 B 05 R 2, 22 ° 11 ’ 28.9 ” S, 41 ° 0 ’ 49.6 ” W, 117 m, 21 Feb. 2009 (1 paratype, ZUEC-POL- 16467); Hab 11 A 01 R 2, 22 ° 55 ’ 7.5 ” S 42 ° 0 ’ 49.2 ” W, 29 m, 28 Feb. 2009 (1 paratype, ZUEC-POL- 16588). Collected on sandy and muddy bottoms, and in the intertidal region, Brazil.	en	Oliveira, Verônica Maria De, Jacobsen, Danny Eibye, Lana, Paulo (2018): Four new species of Paranaitis Southern, 1914 (Phyllodocidae, Annelida) from southern and southeastern Brazil. Zootaxa 4444 (2): 120-136, DOI: 10.11646/zootaxa.4444.2.2
137A0A12FFFCFFFD0193D7F3A2CEC376.taxon	diagnosis	Diagnosis. Proximal part of proboscis with rows of conical, chitinous papillae alternating with long, chitinous papillae; distal extremity covered with micropapillae; terminal ring with oval papillae. Dorsal cirri rounded and asymmetrical, longer than wide. Compound spinigers from segment 3.	en	Oliveira, Verônica Maria De, Jacobsen, Danny Eibye, Lana, Paulo (2018): Four new species of Paranaitis Southern, 1914 (Phyllodocidae, Annelida) from southern and southeastern Brazil. Zootaxa 4444 (2): 120-136, DOI: 10.11646/zootaxa.4444.2.2
137A0A12FFFCFFFD0193D7F3A2CEC376.taxon	description	Description. Holotype complete, 97 segments, 43 mm long, 2.5 mm wide at median part of body including parapodia and excluding chaetae. Body elongate, dorso-ventrally flattened, with uniform width but slightly tapering at posterior end. Prostomium anteriorly rounded, longer than wide (Fig. 5 A). Knob-like nuchal papilla inserted into depression on posterior prostomial margin. Prostomial ligula present. Paired antennae and palps conical, of similar size, postero-laterally placed on prostomium. Antennae and palps 1 / 4 prostomial length. A pair of rounded eyes, with lenses, at posterior margin of prostomium. Proximal part of proboscis with longitudinal rows of conical, chitinous papillae alternating with long, chitinous papillae, and distal part covered with micropapillae (Fig. 5 C – D). First and second segments fused, forming a collar behind prostomium (Fig. 5 A). Four pairs of cylindrical tentacular cirri on first three segments, biarticulate, with short cirrophores and long cirrostyles. Cirri of first segment reaching segment 3. Dorsal and ventral cirri of segment 2 reaching segments 3 and 4, respectively. Dorsal cirri of segment 3 extend to segment 5. Segment 2 with aciculae but lacking neuropodial lobes and chaetae (Fig. 5 B). Neuropodia with chaetae and ventral cirri from segment 3 (Fig. 6 A). Dorsal cirri asymmetrical, with developed cirrophores, from segment 4. Dorsal cirri of median segments rounded and longer than those of anterior and posterior segments (Fig. 6 B – D). Neuropodial lobes shorter than dorsal and ventral cirri, with medium lightbrown acicula and bundle of chaetae. Prechaetal lobe bilobate, asymmetrical and rounded; supraacicular lobe longer than subacicular; lobe asymmetry stronger in anterior and median parapodia. Ventral cirri rounded and asymmetrical, horizontally oriented in relation to neuropodial lobe, more elongated on median than on anterior segments, and almost as wide as long on posterior segments (Fig. 6 C – D). Compound spinigerous chaetae from segment 3. Rostrum of chaetal shaft with a large and robust main tooth surrounded by denticles (Fig. 7 A – B). Pygidium with one pair of cylindrical anal cirri with rounded edges (Fig. 7 C), and probably a median pygidial papilla as indicated by an insertion scar (Fig. 7 D). Coloration. Preserved specimens with body having opaque pink pigmentation and appendages light-brown (Fig. 5 A).	en	Oliveira, Verônica Maria De, Jacobsen, Danny Eibye, Lana, Paulo (2018): Four new species of Paranaitis Southern, 1914 (Phyllodocidae, Annelida) from southern and southeastern Brazil. Zootaxa 4444 (2): 120-136, DOI: 10.11646/zootaxa.4444.2.2
137A0A12FFFCFFFD0193D7F3A2CEC376.taxon	distribution	Distribution. Atlantic Ocean, Brazil: Coroa Grande, Rio de Janeiro. Paranaguá Bay, Mel Island, Paraná, in intertidal regions. Also found on the continental shelf off SE Brazil down to ca. 150 m.	en	Oliveira, Verônica Maria De, Jacobsen, Danny Eibye, Lana, Paulo (2018): Four new species of Paranaitis Southern, 1914 (Phyllodocidae, Annelida) from southern and southeastern Brazil. Zootaxa 4444 (2): 120-136, DOI: 10.11646/zootaxa.4444.2.2
137A0A12FFFCFFFD0193D7F3A2CEC376.taxon	etymology	Etymology. The species name is derived from the Greek word chitin, refering to the presence of chitinous bars on the proboscis.	en	Oliveira, Verônica Maria De, Jacobsen, Danny Eibye, Lana, Paulo (2018): Four new species of Paranaitis Southern, 1914 (Phyllodocidae, Annelida) from southern and southeastern Brazil. Zootaxa 4444 (2): 120-136, DOI: 10.11646/zootaxa.4444.2.2
137A0A12FFFCFFFD0193D7F3A2CEC376.taxon	discussion	Remarks. Eyes are present in the four new species from Brazilian waters, but they are absent in P. abyssalis Hartmann-Schröder, 1975, P. benthicola Knox, 1960, P. bowersi (Benham, 1927), P. caeca (Moore, 1903), and P. uschakovi Eibye-Jacobsen, 1991. The presence of chitinous papillae on the proboscis, and cylindrical pygidial cirri with rounded edges in Paranaitis chitinosa sp. nov. is shared with P. caeca, P. inflata (Hutchings & Murray, 1984), P. misakiensis, P. moritai Kato & Pleijel, 2003, P. pumila Kato & Pleijel, 2003, and P. uschakovi, but the new species differs from them in the morphology of the dorsal, which are reniform in P. caeca and P. moritai, almost circular P. inflata, and oval in P. misakiensis and P. pumila. The new species shares the presence of one neuropodial acicula in the second segment with P. caeca, P. misakiensis, P. polynoides (Moore, 1909), and P. pumila; however, it differs from P. benthicola and P. moritai because they have notopodial aciculae and neuropodial chaetae in the second segment. Noto- and / or neuropodial aciculae in the second segment are not easily observed in fixed specimens because they are embedded in the muscle tissue and only their distal ends appear in the cirrophores. Aciculae typically retract in fixed animals. Paranaitis chitinosa sp. nov. differs from P. assimetrica sp. nov., P. cordiformata sp. nov., and P. cirriformata sp. nov. in the morphology of dorsal cirri, which are rounded in P. assimetrica sp. nov. and P. cirriformata sp. nov. and cordiform in P. cordiformata sp. nov.. The pair of cylindrical anal cirri with rounded edges in P. chitinosa sp. nov. is not found in the other Brazilian congeners.	en	Oliveira, Verônica Maria De, Jacobsen, Danny Eibye, Lana, Paulo (2018): Four new species of Paranaitis Southern, 1914 (Phyllodocidae, Annelida) from southern and southeastern Brazil. Zootaxa 4444 (2): 120-136, DOI: 10.11646/zootaxa.4444.2.2
137A0A12FFF8FFF20193D362A34CC32B.taxon	materials_examined	Holotype. Margin of continental shelf, Campos Basin, Brazil, Hab 17 Foz 15 R 01, 21 ° 10 ' 17.4 " S, 40 ° 45 ' 57.0 " W, 20 m, 22 Jul. 2009 (ZUEC-POL- 16339). Paratypes. 2 paratypes, length ranging from 4 – 11 mm for 36 – 104 segments. Paranaguá Bay, Paraná, Brazil: In front of Port Paranaguá, 25 ° 30 ' 41.6 " S, 48 ° 29 ' 50.3 " W, intertidal, Aug. 2011 (1 paratype, NHMD- 207863). Continental shelf of Campos Basin: Hab 17 Foz 15 R 1, 21 ° 10 ' 17.4 " S, 40 ° 45 ' 57.0 " W, 20 m, 22 Jul. 2009 (1 paratype, ZUEC-POL- 16340). Collected in silt-clay, poorly sorted bottoms on the slope and in coarse sand, sorted bottoms on the continental shelf from the intertidal down to a depth of 52 m.	en	Oliveira, Verônica Maria De, Jacobsen, Danny Eibye, Lana, Paulo (2018): Four new species of Paranaitis Southern, 1914 (Phyllodocidae, Annelida) from southern and southeastern Brazil. Zootaxa 4444 (2): 120-136, DOI: 10.11646/zootaxa.4444.2.2
137A0A12FFF8FFF20193D362A34CC32B.taxon	diagnosis	Diagnosis. Presence of a pair of cavities or fissures between prostomium and peristomium. Proximal part of proboscis with lateral papillae and dorsal chitinous papillae; 4 longitudinal rows of tubercles, 2 pairs on each side, gradually forming rows of tubercles, terminal part with proboscideal ring with oval papillae. One pair of long, cirriform pygidial cirri.	en	Oliveira, Verônica Maria De, Jacobsen, Danny Eibye, Lana, Paulo (2018): Four new species of Paranaitis Southern, 1914 (Phyllodocidae, Annelida) from southern and southeastern Brazil. Zootaxa 4444 (2): 120-136, DOI: 10.11646/zootaxa.4444.2.2
137A0A12FFF8FFF20193D362A34CC32B.taxon	description	Description. Holotype complete specimen, 10 mm long for 61 segments, 1.4 mm wide at median part of body, including parapodia and excluding chaetae. Body long, dorso-ventrally flattened, of uniform width, tapering at posterior end. Prostomium anteriorly rounded, wider than long, with ligule creating distinct depression in posterior part, where nuchal papilla inseres, resembling a rounded button (Fig. 8 A – B). Nuchal organs present on each side of prostomium (Fig. 8 B). Paired frontal, conical and robust antennae and palps, of equal size, postero-laterally positioned on prostomium. Antennae and palps 1 / 4 as long as prostomium (Fig. 8 A – B). A pair of brown eyes, subepidermal, with lenses, located at posterior margin of prostomium. Proximal part of proboscis with lateral papillae and dorsal chitinous papillae; four longitudinal rows of tubercles, two pairs of rows on each side, terminal part of proboscideal ring with oval papillae (Fig. 8 C). Terminal ring of proboscis with oval papillae. First and second segments dorso-ventrally fused as a collar, laterally with pair of cavities at border of prostomium (Fig. 8 B). Four pairs of cylindrical tentacular cirri, biarticulate, with short cirrophores and long cirrostyles, arranged on first three segments. Cirri of segment 1 reaching segment 6. Dorsal and ventral cirri of segment 2 reaching segments 13 and 5, respectively. Dorsal cirri of segment 3 extending to segment 10. Aciculae not observed in segment 2. Neuropodia and ventral cirri from segment 3. Dorsal cirri symmetrical, with asymmetrical, well-developed cirrophores without external extension, rounded, from segment 4. Dorsal cirri longer than wide in anterior segments, clearly wider than long in median segments, and almost as wide as long in posterior segments. Parapodial lobes shorter than dorsal cirri and longer than ventral cirri, with aciculae and neurochaetae. Prechaetal lobes bilobate, asymmetrical and rounded, supraacicular lobe twice as wide as subacicular lobe. Ventral cirri horizontally oriented in relation to parapodial lobes, asymmetrical, on anterior segments oval with rounded edges, on median and posterior segments longer (Fig. 8 D – F). Compound spinigerous chaetae from segment 3. Rostrum of chaetal shaft asymmetrical, with large, conical main fang, base of fang surrounded by small cylindrical teeth of unequal length; chaetal articles with serrated outer edges (Fig. 9 A – C). Pygidium with two pairs of cylindrical anal cirri, cirriform and slender. Cylindrical pygidial papilla present (Fig. 9 D). Coloration. Preserved specimens are opaque.	en	Oliveira, Verônica Maria De, Jacobsen, Danny Eibye, Lana, Paulo (2018): Four new species of Paranaitis Southern, 1914 (Phyllodocidae, Annelida) from southern and southeastern Brazil. Zootaxa 4444 (2): 120-136, DOI: 10.11646/zootaxa.4444.2.2
137A0A12FFF8FFF20193D362A34CC32B.taxon	distribution	Distribution. Atlantic Ocean, Brazilian continental margin; areas of the continental shelf in the Campos Basin. Itiberê River in Paranaguá Bay, Paraná — Brazil.	en	Oliveira, Verônica Maria De, Jacobsen, Danny Eibye, Lana, Paulo (2018): Four new species of Paranaitis Southern, 1914 (Phyllodocidae, Annelida) from southern and southeastern Brazil. Zootaxa 4444 (2): 120-136, DOI: 10.11646/zootaxa.4444.2.2
137A0A12FFF8FFF20193D362A34CC32B.taxon	etymology	Etymology. The name of this species is derived from the Latin word cirrus (cirrus) and formis (shape) and refers to the morphology of the anal cirri.	en	Oliveira, Verônica Maria De, Jacobsen, Danny Eibye, Lana, Paulo (2018): Four new species of Paranaitis Southern, 1914 (Phyllodocidae, Annelida) from southern and southeastern Brazil. Zootaxa 4444 (2): 120-136, DOI: 10.11646/zootaxa.4444.2.2
137A0A12FFF8FFF20193D362A34CC32B.taxon	discussion	Remarks. The small number of specimens, almost all fragmented, hindered the careful observation of the pygidial region. We observed two pairs of pygidial cirri in the holotype (ZUEC-POL- 16339), but we do not rule out the possibility that this is a morphological anomaly. Paranaitis cordiformata sp. nov. differs from P. abyssalis (Hartmann-Schröder, 1975), P. benthicola, P. bowersi, P. caeca, and P. uschakovi in having eyes, but also in the morphology of the dorsal cirri, which are almost circular in P. abyssalis and P. benthicola, and reniform in P. caeca, P. bowersi and P. usachakovi. Paranaitis cirriformata sp. nov. shares the rounded median dorsal cirri, wider than long, with P. speciosa, but they differ in the presence of a rounded proboscideal papillae in, asymmetrical dorsal cirrophores and cylindrical anal cirri in the first. P. cirriformata sp. nov. iffers from the other species of Paranaitis by the presence of nuchal organ on each side of the prostomium (Kato & Pleijel, 2003) and cylindrical and long anal cirri. The anal cirri of P. kosteriensis are also cylindrical but much shorter than in P. cirriformata sp. nov.	en	Oliveira, Verônica Maria De, Jacobsen, Danny Eibye, Lana, Paulo (2018): Four new species of Paranaitis Southern, 1914 (Phyllodocidae, Annelida) from southern and southeastern Brazil. Zootaxa 4444 (2): 120-136, DOI: 10.11646/zootaxa.4444.2.2
137A0A12FFF6FFF30193D290A77EC5F8.taxon	materials_examined	Holotype. Margin of continental shelf, Campos Basin, Brazil, Hab 13 Foz 32 R 2, 21 ° 55 ' 51.2 " S, 40 ° 25 ' 58.2 " W, 49 m, 13 Mar. 2009 (ZUEC-POL- 16341). Paratypes. 5 paratypes, length ranging from 7 – 21 mm and number of segments ranging from 55 – 105. Paranaguá Bay, Paraná, Brazil: Itiberê River, 25 ° 33 ’ 53.7 ” S, 48 ° 21 ’ 19.7 ” W, intertidal, 20 Feb. 2010 (1 paratype, NHMD- 207886); Mel Island, Pontal do Paraná, 25? 33 ’ 13.3 " S, 48? 25 ’ 58.2 " W, intertidal, Sep. 2011 (1 paratype, NHMD- 207963). Margin of continental shelf, Campos Basin, Brazil: Hab 13 I 01 R 3, 21 ° 11 ' 0.9 " S, 40 ° 28 ' 27.1 " W, 26 m, 5 Mar. 2009 (1 paratype, ZUEC-POL- 16408); Hab 17 B 02 R 2, 22 ° 45 ' 49.3 " S, 41 ° 45 ' 33.5 " W, 53 m, 16 Jul. 2009 (2 paratypes, ZUEC-POL- 16500). In poorly sorted fine sand in estuarine areas and on the continental shelf.	en	Oliveira, Verônica Maria De, Jacobsen, Danny Eibye, Lana, Paulo (2018): Four new species of Paranaitis Southern, 1914 (Phyllodocidae, Annelida) from southern and southeastern Brazil. Zootaxa 4444 (2): 120-136, DOI: 10.11646/zootaxa.4444.2.2
137A0A12FFF6FFF30193D290A77EC5F8.taxon	diagnosis	Diagnosis. Dorsal cirri rounded, longer than wide. Rostrum of chaetal shaft with one long, conical, slender main fang, surrounded by small cylindrical teeth. Parapodial lobes strongly asymmetrical.	en	Oliveira, Verônica Maria De, Jacobsen, Danny Eibye, Lana, Paulo (2018): Four new species of Paranaitis Southern, 1914 (Phyllodocidae, Annelida) from southern and southeastern Brazil. Zootaxa 4444 (2): 120-136, DOI: 10.11646/zootaxa.4444.2.2
137A0A12FFF6FFF30193D290A77EC5F8.taxon	description	Description. Holotype a complete specimen with 61 segments, 10 mm long, 1.3 mm wide at median part of body, including parapodia and excluding chaetae. Body long, dorso-ventrally flattened, with uniform width, but slowly tapering at posterior end. Segments 1 and 2 dorsally fused, forming collar behind prostomium. Prostomium with ligule into a depression in posterior margin where rounded nuchal papilla lies (Fig. 10 A – B). Paired frontal antennae and palps antero-laterally on prostomium, conical and robust, of unequal size, palps longer than antennae (Fig. 10 B). One pair of epidermal eyes, brown and with lenses. Proboscis partially differentiated into proximal area, with five rows of conical and chitinous micropapillae (dorsal row wider than 4 latero-ventral rows), and distal area in which rough tubercles become more prominent (Fig. 10 C – D). Terminal ring with 18 rounded papillae. Four pairs of anterior cylindrical tentacular cirri, biarticulate, with short cirrophores and long cirrostyles situated on first three segments. Cirri of segment 1 reaching segment 7. Dorsal and ventral cirri of segment 2 reaching segments 12 and 4, respectively. Dorsal cirri of segment 3 extending to segment 9. Segment 2 with neuropodial aciculae but lacking neuropodial lobes and chaetae (Fig. 10 E). Neuropodia and ventral cirri from segment 3. Dorsal cirri with symmetrical and well-developed cirrophores without external extensions, from segment 4. Dorsal cirri on anterior segments rounded, discretely more elongated than those on median and posterior segments, longer than wide (Fig. 10 F – H). Neuropodial lobes shorter than dorsal cirri and longer than ventral cirri, with clear acicula and bundles of chaetae. Prechaetal lobes bilobate, rounded and asymmetrical, supraacicular lobe considerably longer than subacicular lobe. Normal ventral cirri horizontally oriented in relation to lobes, asymmetrical, on anterior segments oval, on median segments rounded, and on posterior segments oval with truncated distal ends (Fig. 10 A). Compound spinigerous chaetae from segment 3. Rostrum of chaetal shaft with one long, conical, slender main fang, surrounded by small cylindrical teeth; articles with serrated edges (Fig. 11 A – D). Pygidium with one pair of cylindrical anal cirri with inflated bases and tapered distal ends (Fig. 12 A). Median pygidial papilla present (Fig. 12 A – B). Coloration. Living individual with green coloration. Preserved specimens show yellowish pigmentation on the dorso-lateral areas. Geographical Distribution. Atlantic Ocean, Brazilian continental margin; areas of the continental shelf in the Campos Basin; Paranaguá Bay (Paraná, Brazil). Known from intertidal depths to 53 m.	en	Oliveira, Verônica Maria De, Jacobsen, Danny Eibye, Lana, Paulo (2018): Four new species of Paranaitis Southern, 1914 (Phyllodocidae, Annelida) from southern and southeastern Brazil. Zootaxa 4444 (2): 120-136, DOI: 10.11646/zootaxa.4444.2.2
137A0A12FFF6FFF30193D290A77EC5F8.taxon	etymology	Etymology. The species name is derived from the Greek word ἀσΥΜΜΕτρία, which means ‘ to stretch’. The name stresses the fact that the supraacicular lobes are considerably longer than the subacicular ones.	en	Oliveira, Verônica Maria De, Jacobsen, Danny Eibye, Lana, Paulo (2018): Four new species of Paranaitis Southern, 1914 (Phyllodocidae, Annelida) from southern and southeastern Brazil. Zootaxa 4444 (2): 120-136, DOI: 10.11646/zootaxa.4444.2.2
137A0A12FFF6FFF30193D290A77EC5F8.taxon	discussion	Remarks. Paranaitis assimetrica sp. nov. differs from P. abyssalis, P. pumila, P. speciosa and P. uschakovi by the morphology of the dorsal cirri, which are rounded, longer than wide, and by the depth of the ligule, very similar to that of P. benthicola. The ligule and the rounded dorsal cirri are similar to those described for P. pumila, but these species differ in the position of the lateral antennae, presence of papillae on the proboscis, the sharp asymmetry of the parapodial lobes, and the shape of the anal cirri. Paranaitis assimetrica sp. nov. shares the presence of neuropodial acicula in the second segment with P. chitinosa sp. nov., P. caeca, P. misakiensis, P. polynoides, and P. pumila. It differs from P. benthicola and P. moritai because these species present neuroaciculae on the second segment. It differs from all other species by the supraacicular lobe considerably longer than subacicular lobe.	en	Oliveira, Verônica Maria De, Jacobsen, Danny Eibye, Lana, Paulo (2018): Four new species of Paranaitis Southern, 1914 (Phyllodocidae, Annelida) from southern and southeastern Brazil. Zootaxa 4444 (2): 120-136, DOI: 10.11646/zootaxa.4444.2.2
137A0A12FFF3FFF50193D290A411C09B.taxon	materials_examined	Holotype. Margin of continental shelf, Campos Basin, Brazil, Hab 17 I 03 R 01, 21 ° 23 ' 38.0 " S, 40 ° 15 ' 37.1 " W, 88 m, well-sorted fine sediment, 21 Jul. 2009 (ZUEC- POL- 16342). Paratype. A total of 7 paratypes, length ranging from 5 – 20 mm and number of segments ranging from 25 – 115. Paranaguá Bay, Paraná, Brazil: Cotinga Channel, 25 ° 30 ' 41.6 " S, 48 ° 29 ' 50.3 " W, intertidal, 1 Feb. 2011 (1 paratype, NHMD- 207973); Maciel shoal, 25 ° 33 ' 23 " S, 48 ° 24 ' 58 " W, 13 Apr. 2010 (1 paratype, ZUEC-POL- 16489); Papagaios shoal, 25 ° 32 ' 56 " S, 48 ° 26 ' 08 " W, Jun. 2011 (1 paratype, ZUEC-POL- 16564). Paranaguá Bay, 25 ° 30 ' 41.6 " S, 48 ° 29 ' 50.3 " W, Sep. 2011, intertidal (2 paratypes, NHMD- 207984); Itiberê River, 25 ° 30 ' 41.6 " S, 48 ° 29 ' 50.3 " W, Aug. 2011 (1 paraatype ZUEC-POL- 16570). Margin of continental shelf, Campos Basin, Brazil: Hab 11 D 2 R 03, 22 ° 12 ' 53.4 " S, 40 ° 51 ' 12.4 " W, 52 m, 26 Feb. 2009 (1 paratype, ZUEC-POL- 16367). Occurs in wellsorted fine sediment up to 52 m.	en	Oliveira, Verônica Maria De, Jacobsen, Danny Eibye, Lana, Paulo (2018): Four new species of Paranaitis Southern, 1914 (Phyllodocidae, Annelida) from southern and southeastern Brazil. Zootaxa 4444 (2): 120-136, DOI: 10.11646/zootaxa.4444.2.2
137A0A12FFF3FFF50193D290A411C09B.taxon	diagnosis	Diagnosis. Dorsal cirri cordiform and asymmetrical. Chaetae with main tooth conical and short, from segment 2. Pair of cylindrical anal cirri with wide base and tapered distal ends. Rostrum of chaetal shaft with large, conical main fang surrounded by cylindrical denticles of unequal lengths.	en	Oliveira, Verônica Maria De, Jacobsen, Danny Eibye, Lana, Paulo (2018): Four new species of Paranaitis Southern, 1914 (Phyllodocidae, Annelida) from southern and southeastern Brazil. Zootaxa 4444 (2): 120-136, DOI: 10.11646/zootaxa.4444.2.2
137A0A12FFF3FFF50193D290A411C09B.taxon	description	Description. Holotype complete with 97 segments, 15 mm long, 1.0 mm wide at the median part of body, including parapodia and excluding chaetae. Body long, dorso-ventrally flattened, with uniform width, except for small tapering region at posterior end. Prostomium triangular, wider than long, anteriorly rounded, with one short nuchal papilla ligule in a distinct depression, in its posterior portion, where rounded nuchal papilla lies (Fig. 13 A – B). Paired frontal antennae and palps antero-laterally on prostomium, conical and robust, antennae and palps of equal size, long with tapered distal ends. One pair of subepidermal brown eyes with lenses. Proboscis not everted, not observed. First and second segments dorsally fused to form a collar. Four pairs of cylindrical tentacular cirri, biarticulate, with short cirrophores and long and cylindrical cirrostyles, gradually tapered at distal end, situated on first three segments. Cirri of segment 1 reaching segment 4. Dorsal and ventral cirri of segment 2 reaching segments 5 and 4, respectively. Dorsal cirri of segment 3 reaching segment 11 (Fig. 13 A – B). Aciculae not observed in segment 2. Neuropodia and ventral cirri from segment 3. Dorsal cirri with symmetrical cirrophores, developed, without dorsal extension, from segment 4, cordiform and symmetrical. Dorsal cirri on anterior segments distally tapered, on medium segments with more rounded tips, and on posterior segments almost as long as wide (Fig. 13 D – E). Parapodial lobes shorter than dorsal and ventral cirri, with clear aciculae and bundles of chaetae. Prechaetal lobes bilobate, asymmetrical and rounded, supraacicular lobes clearly wide than subacicular lobes. Ventral cirri horizontally oriented in relation to lobes, asymmetrical, on anterior segments oval and distally rounded, on medium segments oval and distally rounded, but with weak tip pointing downwards, and on posterior segments oval, more slender and more symmetrical (Fig. 13 A – C). Compound spinigerous chaetae from segment 2 (Fig. 13 C). Rostrum of chaetal shaft with large, conical main fang surrounded by cylindrical denticles of unequal lengths, articles with serrated outer edges (Fig. 14 A – C). Pygidium with one pair of cylindrical anal cirri with wide base and tapered distal ends. Median pygidial papilla absent (Fig. 14 D). Coloration. Preserved specimens are opaque.	en	Oliveira, Verônica Maria De, Jacobsen, Danny Eibye, Lana, Paulo (2018): Four new species of Paranaitis Southern, 1914 (Phyllodocidae, Annelida) from southern and southeastern Brazil. Zootaxa 4444 (2): 120-136, DOI: 10.11646/zootaxa.4444.2.2
137A0A12FFF3FFF50193D290A411C09B.taxon	distribution	Distribution. Atlantic Ocean, Brazilian continental margin; areas of the continental shelf in the Campos Basin. Paranaguá Bay, Paraná — Brazil.	en	Oliveira, Verônica Maria De, Jacobsen, Danny Eibye, Lana, Paulo (2018): Four new species of Paranaitis Southern, 1914 (Phyllodocidae, Annelida) from southern and southeastern Brazil. Zootaxa 4444 (2): 120-136, DOI: 10.11646/zootaxa.4444.2.2
137A0A12FFF3FFF50193D290A411C09B.taxon	etymology	Etymology. The species name comes from the Latin word cordis and refers to the shape of the dorsal cirri.	en	Oliveira, Verônica Maria De, Jacobsen, Danny Eibye, Lana, Paulo (2018): Four new species of Paranaitis Southern, 1914 (Phyllodocidae, Annelida) from southern and southeastern Brazil. Zootaxa 4444 (2): 120-136, DOI: 10.11646/zootaxa.4444.2.2
137A0A12FFF3FFF50193D290A411C09B.taxon	discussion	Remarks. The cordate shape of the dorsal cirri in Paranaitis cordiformata sp. nov. is similar to those in P. wahlbergi and P. gardineri; on the other hand, they are completely different from the rounded and reniform dorsal cirri described in P. bowersi, P. caeca, P. gardineri, P. moritai, P. uschakovi and P. wahlbergi. This species is similar to P. speciosa by the presence of nuchal papilla and primary chaetal teeth (Kato & Pleijel, 2003); however, it differs in the shape of dorsal and anal cirri, which are more rounded in P. speciosa. Paranaitis cordiformata sp. nov. shares the anal cirri morphology with P. gardineri but it differs by the absence of a median pygidial papilla and the cylindrical shape of the anal cirri. Paranaitis cordiformata sp. nov. differs from P. cirriformata sp. nov., P. assimetrica sp. nov., P. bowersi, P. caeca, P. inflata, P. gardineri, P. kosteriensis, P. misakiensis, P. polynoides, P. pumila, P. speciosa, and P. uschakovi in lacking a pygidial papilla. The cylindrical anal cirri with inflated bases are shared with P. caeca, P. gardineri, and P. polynoides. Paranaitis cordiformata sp. nov. shares the presence of neuropodial chaetae in the second segment with P. benthicola and P. moritai. However, it differs from P. chitinosa sp. nov., P. assimetrica sp. nov., P. caeca, P. misakiensis, P. polynoides, and P. pumila, in which neuropodial aciculae are present in the segment 2.	en	Oliveira, Verônica Maria De, Jacobsen, Danny Eibye, Lana, Paulo (2018): Four new species of Paranaitis Southern, 1914 (Phyllodocidae, Annelida) from southern and southeastern Brazil. Zootaxa 4444 (2): 120-136, DOI: 10.11646/zootaxa.4444.2.2
