874 research outputs found
On a new species of the rare syllid genus Exogonoides (Annelida, Phyllodocida, Syllidae)
No full textFukuda, Marcelo Veronesi, Martín, Guillermo San, Carrerette, Orlemir, Paresque, Karla (2016): On a new species of the rare syllid genus Exogonoides (Annelida, Phyllodocida, Syllidae). Zootaxa 4144 (2): 291-295, DOI: http://doi.org/10.11646/zootaxa.4144.2.1
Eusyllinae
No full textSubfamily Eusyllinae Malaquin, 1893Published as part of Fukuda, Marcelo Veronesi, Nogueira, João Miguel De Matos, Paresque, Karla & Martín, Guillermo San, 2013, Species of Odontosyllis Claparède, 1863 (Annelida: Polychaeta: Syllidae) occurring along the Brazilian coast, pp. 142-162 in Zootaxa 3609 (2) on page 143, DOI: 10.11646/zootaxa.3609.2.2, http://zenodo.org/record/22058
FIGURE 1 in On a new species of the rare syllid genus Exogonoides (Annelida, Phyllodocida, Syllidae)
No full textFIGURE 1. Exogonoides joaoi sp. nov. (A) complete specimen, dorsal view; (B, D) anterior body, dorsal view; (C) posterior body, dorsal view; (E) midbody, dorsal view. Scale bars: A, 1 mm; B–C, 0.5 mm; D, 0.2 mm; E, 0.3 mm.Published as part of Fukuda, Marcelo Veronesi, Martín, Guillermo San, Carrerette, Orlemir & Paresque, Karla, 2016, On a new species of the rare syllid genus Exogonoides (Annelida, Phyllodocida, Syllidae), pp. 291-295 in Zootaxa 4144 (2) on page 293, DOI: 10.11646/zootaxa.4144.2.11, http://zenodo.org/record/26178
Two new species and new records of the genus Paraopisthosyllis Hartmann-Schröder, 1991 (Annelida: Syllidae) from northeastern Brazil and Philippine Islands
No full textParesque, Karla, Martín, Guillermo San, Álvarez-Campos, Patricia, Nogueira, João Miguel De Matos, Fukuda, Marcelo Veronesi (2016): Two new species and new records of the genus Paraopisthosyllis Hartmann-Schröder, 1991 (Annelida: Syllidae) from northeastern Brazil and Philippine Islands. Zootaxa 4178 (1): 116-130, DOI: http://doi.org/10.11646/zootaxa.4178.1.
Exogonoides Day 1963
No full textGenus Exogonoides Day, 1963 Type species: Exogonoides antennata Day, 1963, by monotypy. Diagnosis. Elongate, relatively large bodies, with numerous segments. Palps short, ovate, ventrally bent. Prostomium rounded, with 4 eyes in trapezoidal arrangement, and 3 short antennae. Peristomium with one pair of cirri. Dorsal cirri throughout short, rounded to ovate; ventral cirri apparently fused to parapodial lobes. Compound chaetae as falcigers only; some chaetae secondarily simple, due to loss of blades and enlargement of tip of shafts. Pharynx slightly sinuous posteriorly; proventricle shorter than pharynx, barrel-shaped. Pharyngeal armature not well known. Reproduction unknown.Published as part of Fukuda, Marcelo Veronesi, Martín, Guillermo San, Carrerette, Orlemir & Paresque, Karla, 2016, On a new species of the rare syllid genus Exogonoides (Annelida, Phyllodocida, Syllidae), pp. 291-295 in Zootaxa 4144 (2) on page 291, DOI: 10.11646/zootaxa.4144.2.11, http://zenodo.org/record/26178
FIGURE 2 in Species of Odontosyllis Claparède, 1863 (Annelida: Polychaeta: Syllidae) occurring along the Brazilian coast
No full textFIGURE 2. Odontosyllis aracaensis sp. nov. (Paratype 1, ZUEC-Pol 11891). (A) anterior end, dorsal view; (B) falcigers, anterior chaetiger; (C) falcigers, midbody chaetiger; (D) falcigers, posterior chaetiger; (E) dorsal simple chaeta, posterior chaetiger; (F) ventral simple chaeta, posterior chaetiger; (G) aciculae, anterior chaetiger; (H) acicula, posterior chaetiger. Scale bars: A = 375 µm; B–H = 10 µm.Published as part of Fukuda, Marcelo Veronesi, Nogueira, João Miguel De Matos, Paresque, Karla & Martín, Guillermo San, 2013, Species of Odontosyllis Claparède, 1863 (Annelida: Polychaeta: Syllidae) occurring along the Brazilian coast, pp. 142-162 in Zootaxa 3609 (2) on page 148, DOI: 10.11646/zootaxa.3609.2.2, http://zenodo.org/record/22058
FIGURE 4 in Amblyosyllis, Eusyllis, Odontosyllis, Perkinsyllis and Streptodonta (Annelida: Syllidae) from Brazil, with descriptions of two new species and new records for the country
No full textFIGURE 4. Eusyllis lamelligera, SEM. (A), (B) anterior body, dorsal and ventral views, respectively; (C) anterior body, dorsal view; (D) detail of anterior body, ventral view; (E), (F) anterior body, lateral view; (G) everted pharynx, frontal view; (H) midbody, dorso-lateral view. Scale bars: A–C, H, 100 Μm; D–E, 50 Μm, F, 25 Μm; G, 20 Μm.Published as part of Paresque, Karla, Fukuda, Marcelo Veronesi, Martín, Guillermo San & Nogueira, João Miguel De Matos, 2015, Amblyosyllis, Eusyllis, Odontosyllis, Perkinsyllis and Streptodonta (Annelida: Syllidae) from Brazil, with descriptions of two new species and new records for the country, pp. 301-334 in Zootaxa 4000 (3) on page 309, DOI: 10.11646/zootaxa.4000.3.1, http://zenodo.org/record/25437
Exogone gigas Paresque, Fukuda & Nogueira, 2014, sp. n.
No full textExogone gigas sp. n. (Figures 14–15, Table 1) Material examined. Type series. (Morphological features of specimens from type-series provided in Table 1). Holotype: Project ‘ HABITATS’: State of Rio de Janeiro, 22 ° 11 ' 56 ''S 40 º 32 ' 15 ''W, 68 m, soft bottom (MZUSP 1271), coll. 15 March 2009. Paratypes: Project ‘ HABITATS ’: State of Rio de Janeiro, 22 ° 11 ' 56 ''S 40 º 32 ' 15 ''W, 68 m, soft bottom, 15 March 2009. Paratype 1 (MZUSP 1272), paratype 2 (MZUSP 1273), paratype 3 (MZUSP 1274), paratype 4 (ZUEC 13534), paratype 5 (ZUEC 13533), paratype 6 (ZUEC 13532), paratype 7 (MZUSP 2083), paratype 8 (MZUSP 2084), paratype 9 (MNCN 16.01 / 14629), paratype 10 (MNCN 16.01 / 14630). “Project ‘ HABITATS ’: State of Rio de Janeiro, Campos Basin, Van Veen grab; 21 º 9 ' 9.813 "S 40 º 16 ' 7.837 "W, 103 m: 2 specimens (MZUSP 1293), coll. 21 July 2009; 21 º 10 ' 16.281 "S 40 º 45 ' 58.437 "W, 21 m: 10 specimens (MZUSP 1299), coll. 22 July 2009; 21 º 11 ' 0.342 "S 40 º 28 ' 28.313 "W, 26 m: 9 specimens (MZUSP 1292), coll. 21 July 2009; 21 º 17 ' 25.438 "S 40 º 54 ' 6.865 "W, 16 m: 1 specimen (MZUSP 1291), coll. 18 July 2009; 21 º 17 ' 53.022 "S 40 º 30 ' 59.297 "W, 30 m: 2 specimens (MZUSP 1303), coll. 22 July 2009; 21 º 21 ' 21.471 "S 40 º 52 ' 9.225 "W, 20 m: 2 specimens (MZUSP 1295), coll. 23 July 2009; 21 º 24 ' 43.527 "S 40 º 25 ' 20.695 "W, 32 m: 1 specimen (MZUSP 1304), coll. 20 July 2009; 21 º 28 ' 2.200 "S 40 º 56 ' 21.516 "W, 17 m: 7 specimens (MZUSP 1294), coll. 20 July 2009; 21 º 33 ' 54.232 "S 40 º 42 ' 55.434 "W, 23 m: 2 specimens (MZUSP 1300), coll. 20 July 2009; 21 º 34 ' 13.655 "S 40 º 25 ' 31.571 "W, 28 m: 12 specimens (MZUSP 1305), coll. 23 July 2009; 21 º 40 ' 23.730 "S 40 º 58 ' 23.765 "W, 18 m: 3 specimens (MZUSP 1296), coll. 19 July 2009; 21 º 47 ' 15.563 "S 40 º 57 ' 34.882 "W, 16 m: 2 specimens (MZUSP 1297), coll. 18 July 2009; 21 º 50 ' 21.049 "S 40 º 31 ' 37.376 "W, 28 m: 1 specimen (MZUSP 1302), coll. 23 July 2009; 21 º 57 ' 16.013 "S 40 º 37 ' 59.948 "W, 27 m: 9 specimens (MZUSP 1283), coll. 26 February 2009; 22 º 1 ' 7.705 "S 40 º 31 ' 53.782 "W, 49 m: 1 specimen (MZUSP 1301), coll. 24 July 2009; 22 º 3 ' 41.155 "S 40 º 24 ' 9.910 "W, 56 m: 42 specimens (MZUSP 1284), coll. 25 February 2009; 22 º 6 ' 40.471 "S 40 º 54 ' 46.350 "W, 30 m: 9 specimens (MZUSP 1288), coll. 17 July 2009; 22 º 6 ' 42.052 "S 40 º 54 ' 44.607 "W, 29 m: 34 specimens (MZUSP 1278), coll. 26 February 2009; 22 º 6 ' 55.679 "S 40 º 38 ' 58.325 "W, 53 m: 93 specimens (MZUSP 1282), coll. 26 February 2009; 22 º 6 ' 55.873 "S 40 º 38 ' 59.945 "W, 53 m: 20 specimens (MZUSP 1290), coll. 17 July 2009; 22 º 7 ' 43.309 "S 40 º 18 ' 46.483 "W, 73 m: 3 specimens (MZUSP 1285), coll. 24 February 2009; 22 º 11 ' 30.609 "S 40 º 55 ' 24.468 "W, 44 m: 2 specimens (MZUSP 1298), coll. 17 July 2009; 22 º 12 ' 37.087 "S 40 º 13 ' 18.731 "W, 99 m: 2 specimens (MZUSP 1286), coll. 24 February 2009; 22 º 12 ' 52.897 "S 40 º 51 ' 12.067 "W, 52 m: 82 specimens (MZUSP 1280), coll. 26 February 2009; 22 º 12 ' 52.906 "S 40 º 51 ' 13.559 "W, 52 m: 14 specimens (MZUSP 1289), coll. 17 July 2009; 22 º 17 ' 25.519 "S 40 º 6 ' 36.262 "W, 143 m: 2 specimens (MZUSP 1287), coll. 24 February 2009; 22 º 18 ' 50.070 "S 41 º 21 ' 35.068 "W, 28 m: 18 specimens (MZUSP 1277), coll. 27 February 2009; 22 º 19 ' 27,600 " S 40 º 37 ' 25,122 "W, 75 m: 14 specimens (MZUSP 1281), coll. 15 March 2009; 22 º 37 ' 35.330 "S 41 º 21 ' 51.788 "W, 53 m: 2 specimens (MZUSP 1276), coll. 27 February 2009; 22 º 52 ' 1.951 "S 40 º 57 ' 28.983 "W, 92 m: 1 specimen (MZUSP 1279), coll. 22 February 2009; 23 º 10 ' 4.258 "S 41 º 3 ' 6.679 "W, 105 m: 1 specimen (MZUSP 1275), coll. 21 February 2009. Project ‘ BioPol-NE ’: State of Paraíba: João Pessoa, Praia de Cabo Branco (06° 57.761 'S 34 ° 50.556 'W), intertidal: 7 specimens (MZUSP 1346), coll. 0 2 February 2010. Conde, Praia de Tabatinga (07° 19.297 'S 34 ° 47.862 'W), intertidal: 1 specimen (MZUSP 1347), coll. 0 1 September 2011. Additional material examined. Exogone multisetosa Friedrich, 1956. Peru, Lima – holotype (ZMH P- 15371), 2 paratypes (ZMH P- 15372), coll. 22 June 1952, det. Friedrich, 1956. Description. Body thin, elongated, 8–11 (10) mm long and 0.20–0.35 (0.27) mm wide, with up to 80 (78) chaetigers. Palps triangular, distally rounded, totally fused, with a conspicuous line of fusion and distal notch (Figs 14 A, 15 A). Prostomium ovate, shorter than palps, two pairs of eyes in trapezoidal arrangement; anterior eyespots absent; median antenna inserted between anterior pair of eyes, elongated, almost reaching tip of palps (Fig. 14 A); lateral antennae small, digitiform, inserted slightly anteriorly to median antenna (Figs 14 A, 15 A). Ciliated nuchal organs dorsolaterally between prostomium and peristomium (Fig. 15 A, C). Peristomium shorter than following chaetigers; peristomial cirri ovate, similar to lateral antennae but smaller, about 2 / 3 as long as lateral antennae (Fig. 14 A). Dorsal cirri with shape similar to lateral antennae but slightly smaller, absent on chaetiger 2. Ventral cirri inserted at bases of parapodia, shorter than parapodial lobes. Parapodial lobes conical; anterior parapodia with 1–3 (1–2) spiniger-like chaetae and 4–10 (6–9) falcigers each, midbody parapodia with 1–2 (1) spiniger-like chaetae and 2–4 (3–4) falcigers, posterior parapodia with single spiniger-like chaeta and 2–3 (2) falcigers each; spinigerlike chaetae of chaetiger 2 with thick shafts, subdistally provided with triangular process with minute spines (Figs 14 B, 15 D–E); shafts of spiniger-like chaetae of remaining chaetigers without triangular process, subdistally spinulated (Figs 14 C–E, 15 F, I, L, P); blades of spiniger-like chaetae unidentate (Figs 14 E, 15 G, K) to indistinctly bifid (Fig. 14 B–D), 50 – 40 (47 – 42) µm long on anterior parapodia, 45 – 22 (45 – 25) µm long on midbody, 35 – 17 (25 – 17) on posterior parapodia. Shafts of falcigers subdistally enlarged and spinulated; blades of falcigers spinulated and bidentate (Figs 14 C–E, 15 E–F, H–I, P), spinulation of blades and difference of size between teeth more evident on anterior parapodia; blades 6–11 (7–10) µm long on anterior parapodia, 4–9 (4–8) µm on midbody, and 3–6 (4–6) µm long on posterior parapodia. Dorsal simple chaetae usually beginning from chaetiger 6–11 (11), sigmoid, subdistally spinulated, with acute tip (Figs 14 F, 15 J), stouter on posterior chaetigers (Fig. 14 G). Ventral simple chaetae present only on posterior chaetigers, sigmoid, bidentate, subdistal tooth larger (Figs 14 H, 15 M, O). Anterior parapodia with up to three aciculae each, two slightly bent subdistally, with inflated, apparently hollow tip, third acicula distally bent at almost 90 ° (Fig. 14 I); from midbody onwards, single acicula per parapodium, of the first type (Fig. 14 J). Pygidium semicircular with pair of thin, elongate anal cirri. Pharynx through 3.5–5.5 (5.5) segments, tooth at anterior border; anterior margin of pharynx surrounded by papillae and fringe of cilia (Fig. 15 B); proventricle extending for 3.5–5 (3.5) chaetigers, with 25–27 (26) rows of muscle cells. Remarks. This species is characterized by having a triangular process with minute spines on the shafts of spiniger-like chaetae of chaetiger 2, a large median antenna, and by lacking dorsal cirri on chaetiger 2. Exogone lourei, E. rostrata, E. longicornis, E. multisetosa and E. arenosa are the species most similar to E. gigas sp. n., sharing with it the presence of a triangular process on the shafts of the spiniger-like chaetae in certain anterior chaetigers. Exogone lourei differs from E. gigas sp. n. by having dorsal cirri on chaetiger 2, a triangular process on the shafts of spiniger-like chaetae of chaetiger 1 and 2, a pharynx through 6–7 segments, and a proventricle extending for ca. 3 segments, with 23 rows of muscle cells, while E. gigas sp. n. lacks dorsal cirri on chaetiger 2, has a triangular process on the shafts of spiniger-like chaetae only on chaetiger 2, pharynx extending through 3.5–5.5 segments, and proventricle through 3.5–5 segments, with 25–27 rows of muscle-cells. Exogone rostrata is similar to E. gigas sp. n. by having median antenna longer than lateral ones, and pharynx through about 5 chaetigers. However, E. rostrata differs from E. gigas sp. n. by being a shorter species, with up to 7 mm in length and 47 chaetigers vs. 1–10 mm and 80 chaetigers as in E. gigas sp. n.. Furthermore, E. rostrata has dorsal cirri on chaetiger 2; spiniger-like chaetae with spinulated triangular process on chaetiger 1 only, and with shorter, distally bifid blades, ca. 20 µm long; two aciculae per parapodium on anterior body; and proventricle shorter, through about 3 segments. On the other hand, E. gigas sp. n. has spiniger-like chaetae with smooth triangular process, on chaetiger 2 only, and longer, unidentate to indistinctly bifid blades, 17–50 µm long; three aciculae per parapodium on anterior body; and proventricle through 3.5–5 segments. TABLE 1. Morphological features of the type series of Exogone gigas sp. n. Exogone longicornis also has dorsal cirri on chaetiger 2 and a triangular process is present on the shafts of spiniger-like chaetae of chaetigers 1 and 2 (San Martín 2005). In addition, E. longicornis has shorter blades of spiniger-like chaetae throughout, 26 µm, 26 µm, and 20 µm long on anterior, midbody and posterior chaetigers, respectively, and a proventricle with 33–38 rows of muscle cells. In contrast, E. gigas sp. n. has blades of spinigerlike chaetae 30–50 µm, 22–45 µm, and 17–35 µm long on anterior, midbody and posterior chaetigers, and a proventricle with 25–27 rows of muscle-cells. Exogone multisetosa is a smaller species, the holotype, with 41 chaetigers, was described from the Pacific Ocean (Lima, Peru) and can be differentiated from E. gigas sp. n. by having a shorter, squared triangular process on spiniger-like chaetae of chaetiger 2, ventral simple chaetae with acute tip, and shorter proventricle, through 2.5–3 segments. Exogone arenosa differs from E. gigas sp. n. by having dorsal cirri on chaetiger 2, pharynx through 7 segments, and proventricle with 27–36 rows of muscle cells. Etymology. The epithet gigas is derived from Latin, meaning "giant", and refers to the length of this species, which is the longest known for this genus. Distribution. Atlantic Ocean: Brazil (Rio de Janeiro and São Paulo). From the intertidal zone to ca. 143 m.Published as part of Paresque, Karla, Fukuda, Marcelo Veronesi & Nogueira, João Miguel De Matos, 2014, The genus Exogone (Polychaeta: Syllidae) from the Brazilian coast, with the description of a new species, pp. 501-533 in Zootaxa 3790 (4) on pages 525-530, DOI: 10.11646/zootaxa.3790.4.1, http://zenodo.org/record/25148
Streptodonta fauchaldi Paresque, Fukuda, Martín & Nogueira, 2015, sp. n.
No full textStreptodonta fauchaldi sp. n. Figures 15–18; Table 2 Material examined. Project ' Habitats'. 21 ° 11 '0"S 40 ° 28 ' 27 "W, 26 m: 1 specimen (MZUSP 2710), 0 5 March 2009; 21 ° 11 ' 1 "S 40 ° 28 ' 28–29 "W, 26 m: 4 specimens (MZUSP 2712, ZUEC-POL 315), 21 July 2009; 21 ° 17 ' 25 "S 40 ° 54 ' 7 "W, 15 m: 1 specimen (MZUSP 2705), 0 8 March 2009; 21 ° 17 ' 51 "S 40 ° 30 ' 59 "W, 29 m: 1 specimen (ZUEC-POL 309), 0 7 March 2009; 21 ° 22 ' 58 "S 40 ° 19 ' 44 "W, 53 m: 2 specimens (MZUSP 2713), 21 July 2009; 21 ° 28 ' 2 "S 40 ° 56 ' 20 "W, 16 m: 1 specimen (ZUEC-POL 308), 10 March 2009; 21 ° 44 ' 19 "S 40 ° 17 ' 15 "W, 50 m: 1 specimen (ZUEC-POL 312), 0 9 March 2009; 21 ° 44 ' 39 "S 40 ° 43 ' 8 "W, 21 m: 1 specimen (MZUSP 2709), 19 July 2009; 21 ° 45 ' 14 "S 40 ° 14 ' 7 "W, 67 m: 1 specimen (MZUSP 2707), 14 March 2009; 21 ° 45 ' 15 "S 40 ° 14 ' 8 "W, 66 m: 2 specimens (ZUEC-POL 311), 0 8 July 2009; 22 ° 11 ' 59 "S 40 ° 32 ' 8 "W, 68 m: 3 specimens (MZUSP 2706, ZUEC- POL 310), 15 March 2009; 22 ° 12 ' 37–38 "S 40 ° 13 ' 18–19 "W: 2 specimens (MZUSP 2711, ZUEC-POL 313); 22 ° 23 ' 22 "S 40 ° 34 ' 59 "W, 110m: 1 specimen (ZUEC-POL 314), 25 Jul 2009. Type series. All specimens collected by the Project ' Habitats ', off Rio de Janeiro, Campos Basin. Holotype (MZUSP 2714) and paratype 1 (ZUEC-POL 316) collected 21 ° 33 ' 52–53 "S 40 ° 42 ' 53–55 "W, 21–22 m, 10 March 2009. Paratype 2 (MZUSP 2716) collected 21 ° 24 ' 45 "S 40 ° 25 ' 19 "W, 32 m, 20 July 2009. Paratype 3 (MZUSP 2717) collected 21 ° 44 ' 42 "S 40 ° 43 ' 9 "W, 22 m, 11 March 2009. Paratype 4 (ZUEC-POL 317) and two paratypes (MNCN 16.01 / 16558) collected 21 ° 17 ' 53 "S 40 ° 30 ' 59 "W, 30 m, 22 July 2009. Paratype 5 (MZUSP 2715) collected 21 ° 33 ' 54 "S 40 ° 42 ' 53 "W, 23 m, 20 July 2009. Two paratypes (MNCN 16.01 / 16559) collected 21 ° 34 ' 12 "S 40 ° 25 ' 32 "W, 28 m, 23 July 2009. Morphological data of selected specimens of the type series are provided in Table 2. Additional material examined. Streptodonta pterochaeta (Southern, 1914). Holland, Schouwen-Duiveland: 1 specimen (ZMH P- 14715), coll. 30 April 1966, Wolff. Description. Relatively medium-sized, fragile bodies, most specimens examined anterior fragments, with few chaetigers after proventricle segments; largest fragment paratype 1 (ZUEC-POL 316), 5.4 mm long, 0.4 mm wide, with 38 chaetigers (Table 2); pigmentation patterns absent in preserved material, no live animals examined; body with dorsal tufts of cilia in transverse rows on each chaetiger (Figs 16 A; 17 C, E), dorsal to bases of dorsal cirri (Fig. 17 C) and a tuft of cilia ventrally, close to bases of ventral cirri (Figs 16 B, D; 17 A). Palps foliaceous, triangular, wider than prostomium (Figs 15 A; 16 A–D). Prostomium ovate with 2 pairs of eyes in trapezoidal arrangement and 1 pair of anterior eyespots; lateral antennae inserted close to anterior margin, extending to about twice length of palps; median antenna inserted close to posterior border of prostomium, posterior to posterior pair of eyes, about twice as long as lateral antennae (Figs 15 A; 16 A, C). Nuchal organs as pair of dorso-lateral densely ciliated rows on posterior border of prostomium (Fig. 16 A, C). Peristomium dorsally shorter than anterior chaetigers; dorsal peristomial cirri up to twice as long as median antenna but thinner, ventral peristomial cirri slightly shorter than lateral antennae (Fig. 16 A–D). Dorsal cirri of chaetiger 1 longer than remaining appendages, thinner than dorsal peristomial cirri (Figs 15 A; 16 A); dorsal cirri of remaining chaetigers alternating thin cirri, about as long as dorsal peristomial cirri, and distally tapering cirri as wide as antennae, about as long as 3 / 4 – 1 / 2 body width at corresponding chaetiger (Figs 15 A; 16 A); ventral cirri shorter than parapodial lobes, ovate on anteriormost parapodia, leaf-like to pyriform from chaetigers 3–4 onwards (Figs 16 B, D; 17 A). Parapodial lobes stouter on anterior body, thinner from proventricle posteriorwards. Anterior parapodia with 2–10 spiniger-like chaetae each; midbody parapodia with 1–6 each; spiniger-like chaetae with slightly spinulated shafts subdistally; blades with short, thin spinulation, bidentate, teeth small, about same size or distal tooth slightly larger (Figs 15 C; 17 B); blades 67 – 25 µm long on anterior body, 62 – 32 µm long on midbody, ~ 45 µm long on posterior body (Table 2). Anterior body parapodia with more than 30 falcigers each, midbody parapodia with 10–15 falcigers each; falcigers with subdistally spinulated shafts; on anterior chaetigers, blades 15 – 10 µm long, with coarse, short spinulation and bidentate teeth of similar size, obliquely directed (Figs 15 D; 17 D; Table 2); from midbody Streptodonta fauchaldi sp. n. Holotype Paratype 1 Paratype 2 Paratype 3 Paratype 4 Paratype 5 onwards, blades slightly shorter, 15 – 10 µm long, spinulation shorter or absent, and bidentate, distal tooth conspicuously shorter than subdistal one (Figs 15 E; 17 F–G; Table 2). Dorsal simple chaetae only present from mid- to posterior body chaetigers (Table 2), thinner than remaining chaetae, subtly sigmoid, subdistally spinulated, and bidentate with small teeth, subdistal tooth slightly larger than distal one, with rounded space between teeth (Fig. 15 F); ventral simple chaetae only present from mid- to posterior body chaetigers (Table 2), approximately same width as falciger shafts, and bidentate, distal tooth conspicuously smaller than subdistal one (Fig. 15 G). Anterior parapodia with up to 5 aciculae each, progressively diminishing towards posterior body, single acicula per parapodium from last proventricular segments; aciculae distally enlarged, apparently hollow, tips protruding from parapodial lobes (Figs 15 B, 17 C–D, 18 A–C); aciculae on anterior body much stouter than falciger shafts (Fig. 15 B), about twice as wide as falciger shafts, from midbody onwards. Pharynx long, extending through about 21 segments (Fig. 15 A; Table 2), with small, conical tooth on anterior half and opening surrounded by 10 soft papillae and fringe of cilia (Fig. 16 B, D); proventricle wider than pharynx, extending through 10–11 segments, with ~ 35 rows of muscle cells (Fig. 15 A; Table 2). Biology. Some animals found inside mucuous, transparent tubes, similar to those made by specimens of Exogone Ørsted, 1845. Remarks. Streptodonta fauchaldi sp. n. closely resembles S. exsulis, both species differing from S. pterochaeta in having spiniger-like chaetae. Streptodonta fauchaldi sp. n. differs from S. exsulis in having cilia distributed in transverse rows dorsally on chaetigers and in tufts at bases of dorsal and ventral cirri restricted to dorso-lateral areas (close to dorsal cirri in S. exsulis), anterior body falcigers with teeth of similar size (distal tooth smaller than subdistal one throughout in S. exsulis), blades of spiniger-like chaetae up to 67 µm long (up to 56 µm long in S. exsulis), and proventricle extending through up to 13 chaetigers, with 37 rows of muscle cells (9 chaetigers with 29 rows of muscle cells in S. exsulis) (Ramos et al. 2010). Etymology. The species is dedicated to Dr. Kristian Fauchald, an inspiration for many polychaetologists and marine biologists in general.Published as part of Paresque, Karla, Fukuda, Marcelo Veronesi, Martín, Guillermo San & Nogueira, João Miguel De Matos, 2015, Amblyosyllis, Eusyllis, Odontosyllis, Perkinsyllis and Streptodonta (Annelida: Syllidae) from Brazil, with descriptions of two new species and new records for the country, pp. 301-334 in Zootaxa 4000 (3) on pages 326-331, DOI: 10.11646/zootaxa.4000.3.1, http://zenodo.org/record/25437
Odontosyllis brevichaetosa Paresque, Fukuda, Martín & Nogueira, 2015, sp. n.
No full textOdontosyllis brevichaetosa sp. n. Figures 8–11; Table 1 Material examined. Project ' BioPol-NE'. State of Paraíba, Mataraca, Barra de Camaratuba (6 ° 36.196 'S 34 ° 57.867 'W), intertidal: 1 specimen (MZUSP 2817), coll. 12 August 2010. Baía da Traição, Praia do Farol (6 ° 41.331 'S 34 ° 55.803 'W), intertidal: 66 specimens (MZUSP 2813), coll. 0 9 August 2010. Rio Tinto, Barra de Mamanguape (6 ° 46.140 'S 34 ° 55.025 'W), intertidal: 47 specimens (MZUSP 2812), coll. 11 August 2010. João Pessoa, Cabo Branco (7 ° 8.815 'S 34 ° 47.773 'W), intertidal: 5 specimens (MZUSP 2811), coll. 0 2 February 2010. Conde, Praia de Jacumã (7 ° 16.535 'S 34 ° 47.969 'W), intertidal: 1 specimen (MZUSP 2818), coll. 29 January 2010. State of Pernambuco, Goiana, Praia de Pontas de Pedra (7 ° 36.927 'S 34 ° 48.296 'W), intertidal: 91 specimens (MZUSP 2819), coll. 13 December 2012. Ilha de Itamaracá, Ponta do Jaguaribe (7 ° 4.243 'S 34 ° 49.291 'W), intertidal: 7 specimens (MZUSP 2821), coll. 11 December 2012. Type series. All specimens collected by the Project ' BioPol-NE '. State of Pernambuco, Goiana, Praia de Pontas de Pedra (7 ° 36.927 'S 34 ° 48.296 'W), intertidal: Holotype (MZUSP 2806), Paratype 1 (MZUSP 2807) and Paratype 7 (ZUEC-POL 17003) collected 13 December 2012. State of Paraíba, Baía da Traição, Praia do Farol (6 ° 41.331 'S 34 ° 55.803 'W), intertidal: Paratype 2 (MZUSP 2808), Paratype 3 (MZUSP 2809), Paratype 4 (MZUSP 2810), Paratype 5 (ZUEC-POL 17004), Paratype 6 (ZUEC-POL 17005) and Paratype 8 (MNCN 16.01 / 16550), coll. 0 9 August 2010; Rio Tinto, Barra de Mamanguape (6 ° 46.140 'S 34 ° 55.025 'W), intertidal: Paratype 9 (MNCN 16.01 / 16551), coll. 11 August 2010. Additional material examined. Odontosyllis australiensis Hartmann-Schröder, 1979. Australia, Western Australia, Kimberley region: Lafontaine Is. (14 ° 10 'S 125 ° 47 'E), 15 m: 1 specimen (AM W 28933), coll. P.A. Hutchings, 19 July 1988; reef south of Lucas Is., Brunswick Bay (15 ° 16 'S 124 ° 29 'E), 2 m; 1 specimen (AM W 28932), coll P.A. Hutchings, 24 July 1988; Calliope R., Gladstone (23 ° 51 'S 151 ° 10 'E), silty sand, 5.6 m: 1 specimen (AM W 198074), coll. P. Saenger, October 1980. Description. Small to medium-sized body, largest specimen incomplete, 10.2 mm long, 0.8 mm wide, with 58 segments (Table 1). Live specimens without pigmentation, body beige after preservation. Palps distally rounded, basally fused (Fig. 8 A–D). Prostomium ovate with two pairs of eyes in rectangular to trapezoidal arrangement, anterior eyespots absent (Fig. 9 A); lateral antennae inserted on anterior margin of prostomium, about twice as long as combined length of palps and prostomium; median antenna inserted on middle of prostomium, between eyes, 1.5 times length of lateral antennae (Figs 8 A–F; 9 A); nuchal organs as a broad semi-circular rows of cilia, from bases of lateral antennae to lateral borders of prostomium (Figs 8 D–F; 9 A), bordering posterior margin of prostomium (Fig. 8 D, F). Peristomium dorsally reduced, with semi-circular occipital flap covering middorsal area of posterior prostomium (Figs 8 A–B, D–F; 9 A), occipital flap with fringe of cilia on anterior boarder (Fig. 8 A–B, D, F); dorsal peristomial cirri slightly longer than median antenna, ventral peristomial cirri about same length as median antenna, inserted ventro-lateraly, close to mouth (Fig. 8 C). Chaetiger 1 with transverse row of cilia extending dorsally for short extension from bases of dorsal cirri (Fig. 8 A); midbody with lateral constrictions between chaetigers, with tufts of cilia ventrally at bases of cirrophores (Fig. 10 O) and a tuft of cilia in either side, anterior and posterior, of parapodial lobes (Fig. 8 G–H). Dorsal cirri of chaetiger 1 slighly longer than dorsal peristomial cirri (Fig. 8 B); dorsal cirri of chaetigers 2 and 3 ca. 1 / 2 and 2 / 3 as long as dorsal cirri 1, respectively; remaining dorsal cirri slightly shorter than dorsal cirri 2 (Fig. 8 A). Antennae, peristomial and dorsal cirri throughout with short cirrophores (Figs 8 A–G; 9 A; 10 A), cirrostyles distally tapering, alternating between long, similar in length to body width or slightly shorter, and short, ca. 2 / 3 as long as longer cirri. Ventral cirri rounded to ovate, slightly shorter than parapodial lobes (Fig. 8 C). Parapodial lobes conical, bilobed distally (Fig. 8 G). Anterior parapodia with 17–22 falcigers each (Fig. 10 C), midbody with 5–16, posterior parapodia with 8–14 falcigers each (Table 1); shafts of falcigers subdistally spinulated, with straight tips in anterior parapodia and in dorsalmost falcigers of each fascicle throughout; from midbody onwards, shafts of ventralmost falcigers subdistally inflated, sigmoid, with short, forward directed tips (Figs 9 C, E, I; 10 B, D, F–G, J, M–N); ligament between shafts and blades spinulated, especially on mid- and posterior body chaetigers (Figs 9 C, E, I; 10 G, J); blades of falcigers spinulated and bidentate, teeth of similar size on anterior and midbody parapodia, falcigers of posterior parapodia with subdistal tooth shorter, difference in length of teeth more conspicuous in ventral chaetae (Figs 9 C, E, I; 10 B, D–L); blades with inverted dorso-ventral gradation in length, 6–17 µm long on anterior chaetigers, 5–16 µm long on midbody, 8–14 µm long on posterior chaetigers (Table 1). Dorsal simple chaetae beginning on chaetigers 2–24 (Table 1), thin, ca. 1 / 3 as thick as shafts of falcigers, slightly sigmoid, subdistally spinulated (Figs 9 G; 10 B) with rounded tips; ventral simple chaetae only present in last chaetigers (Table 1), sigmoid, bidentate, subdistal tooth triangular, sligtly smaller than distal tooth, subdistally spinulated, about 1 / 2 as thick as shafts of falcigers (Figs 9 H; 10 O). Anterior parapodia with 2–3 aciculae each, midbody with 1–2, each posterior parapodium with single acicula; aciculae subdistally enlarged, with collar of spines, and short, acute tip (Fig. 9 B, D, F). Pygidium not seen. Pharynx through 2–3 segments (Fig. 9 A; Table 1), trepan with six teeth and two lateral plates (Fig. 11 C); proventricle through 6–8 segments, with ca. 60 muscle cell rows (Figs. 9 A; 11 A–B; Table 1). Remarks. Odontosyllis brevichaetosa sp. n. is characterized by having short, bidentate falciger blades with inverted dorso-ventral gradation in length, and shafts of ventralmost falcigers from midbody parapodia onwards subdistally inflated, with sigmoid tip. At first glance, the pharynx of O. brevichaetosa sp. n. seems to lack denticles. In fact, they are very difficult to see, even after dissection, because they are covered by an opaque hood (Fig. 11 A–B). Odontosyllis australiensis Hartmann-Schröder, 1979, from Australia, closely resembles O. brevichaetosa sp. n., in having an occipital flap of similar size, dorsal cirri with a similar pattern of alternation between long and short cirri along the body, falcigers with short, bidentate blades, with heavily spinulated ligament between shafts and blades, dorsal and ventral simple chaetae morphologically similar, same number of aciculae per parapodium throughout, and pharynx and proventricle of similar length. However, O. australiensis has one transverse row of cilia dorsally on each chaetiger, extending to parapodial lobes, falcigers with all shafts similar in shape and blades with teeth about same size throughout, and trepan with five teeth (San Martín & Huchings 2006). On the other hand, O. brevichaetosa sp. n. has a fringe of cilia on anterior border of peristomium and, except for chaetiger 1, dorsal rows of cilia are absent on chaetigers; falcigers with more sigmoid, subdistaly inflated shafts ventralwards, blades with distal tooth larger than subdistal one on posterior parapodia; and a trepan with six teeth. Odontosyllis polycera (Schmarda, 1861) a widely reported species, with type locality in Table Bay, South Africa, resembles O. brevichaetosa sp. n. in the morphology of the falcigers and dorsal simple chaetae. Nevertheless, it is a larger species, with proportionally larger occipital flap, covering most of the prostomium, and has up to 50 falcigers per parapodium on anterior body, blades of falcigers 23 – 15 µm long, and ventral simple chaetae with short subdistal tooth (San Martín & Huchings 2006). In contrast, O. brevichaetosa sp. n. has shorter occipital flap, 17–22 falcigers per parapodium on anterior body, blades of falcigers 5–16 µm long, and ventral simple chaetae with large subdistal tooth. Odontosyllis brevichaetosa sp. n. differs from the other species of this genus occurring in Brazilian waters except for O. cf. fulgurans sensu Fukuda & Nogueira, 2006 in lacking dorsal colour patterns. However, Odontosyllis cf. fulgurans, has falcigers with longer, bidentate blades throughout, with teeth of similar size. In addition to the presence of color patterns, O. guarauensis has longer and ciliate palps; shorter and proportionally stouter antennae and dorsal cirri throughout; roughly rectangular occipital flap, almost as wide as the prostomium, covering posterior and, sometimes, the anterior pairs of eyes; shafts of dorsalmost falcigers with subdistal, nearly triangular enlargement and thin, straight tip (see Fukuda et al. 2013, Figs 4 C–D; 7 E, G); aciculae irregularly enlarged distally; and trepan with nine teeth (Fukuda et al. 2013). Odontosyllis aracaensis has a characteristic distribution of body ciliation, shafts of falcigers with straight tips and thinner and elongated blades, and characteristic aciculae, subdistally enlarged and slightly spinulated, sometimes with short, acute tip (Fukuda et. al. 2013); Odontosyllis guillermoi has 28 and 20 falcigers on each anterior and midbody parapodium, respectively, falcigers with sharp and slightly shorter subdistal tooth on anterior chaetigers, much shorter from midbody onwards, and a pharynx extending for 9–10 chaetigers. Distribution. Atlantic Ocean: only know from off the northern coast of Paraíba, northeastern Brazil. Etymology. The species epithet refers to the characteristic short size of the blades of falcigers.Published as part of Paresque, Karla, Fukuda, Marcelo Veronesi, Martín, Guillermo San & Nogueira, João Miguel De Matos, 2015, Amblyosyllis, Eusyllis, Odontosyllis, Perkinsyllis and Streptodonta (Annelida: Syllidae) from Brazil, with descriptions of two new species and new records for the country, pp. 301-334 in Zootaxa 4000 (3) on pages 314-320, DOI: 10.11646/zootaxa.4000.3.1, http://zenodo.org/record/25437
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