Amblyosyllis granosa Ehlers 1897

Amblyosyllis granosa Ehlers, 1897 Figures 1���2 Amblyosyllis granosa Ehlers, 1897: 58; Westheide 1974: 260 ���263, figs 30���31; non Verdes et al. 2013: 2120, figs 7���8. Material examined. Project 'BioPol'. Ubatuba���Praia do F��lix (23 �� 23 ' 34 "S 44 �� 58 ' 19 "W): 1 spec. (MZUSP 2384), 4 Nov 2002. S��o Sebasti��o���Praia de S��o Francisco (23 �� 44 ' 54 "S 45 �� 24 ' 33 "W): 1 spec., 19 Apr 2003; Praia do Ara���� (23 �� 48 ' 54 "S 45 �� 24 ' 24 "W): 2 specs, 25 Sep 2003. Additional material examined. Amblyosyllis granosa. Atlantic Ocean, Strait of Magellan, Punta Arenas: 1 spec. (type, ZMH V- 4751), coll. H. Mag. Samm., 73, det. Ehlers, 1897. Pterosyllis formosa corallicola Hartmann-Schr��der, 1960. Red Sea, Egypt, Sarso: 1 spec. (holotype, ZMH P- 14566), coll. Gerlach, 13 Nov 1957; Ghardaqa: 1 anterior end + posterior ends (paratypes, ZMH P- 14567), coll. Gerlach, Remane, Schulz, 15 Nov 1957. Description. Small-sized body, largest specimen examined ~ 5 mm long, 0.8 mm wide, with 13 chaetigers. Palps ovate, completely free from each other. Prostomium ovate with 2 coalescent pairs of eyes in trapezoidal arrangement (Fig. 1 A���B); lateral antennae inserted on anterior margin of prostomium, with up to 15 articles each; median antenna inserted slightly posterior to lateral ones, ~ 1 / 3 longer, with up to 21 subequal articles, basally smooth, with large cirrophore (Fig. 1 A���B); nuchal epaulettes relatively short, extending until close to posterior border of chaetiger 1 (Fig. 1 B). Peristomium dorsally short; dorsal peristomial cirri longer than median antenna, with up to 38 articles each, ventral peristomial cirri slightly shorter than lateral antennae, with ~ 10 articles each (Fig. 1 A). Dorsal cirri throughout of nearly even length, with 20���30 articles each, distal articles tapering; ventral cirri ovate, prominent, extending beyond parapodial lobes (Fig. 1 A). Antennae and cirri throughout with yellow to reddish granular inclusions (Fig. 1 A). Parapodial lobes distally bilobed. Anterior parapodia with 16���23 falcigers each; posterior parapodia with 25���35 falcigers each. Falciger shafts slightly spinulated subdistally, shafts progressivelly stouter towards posterior body (Fig. 2 A���B); falciger blades spinulated, with short straight spines, and bidentate, distal tooth larger; blades with dorso-ventral gradation in length, 42 ��� 22 ��m long on anterior body, 36 ��� 22 ��m long on posterior body (Fig. 2 A���B). Dorsal and ventral simple chaetae not observed. Anterior parapodia with up to 5 aciculae each (Fig. 2 C), progressively less aciculae per parapodium towards posterior body, last ones with only 2 aciculae each (Fig. 2 D); aciculae differing from each other only in thickness, all straight, distally pointed, tips protruding from parapodial lobes (Fig. 2 C���D). Pygidium rounded, anal cirri similar to dorsal cirri, incomplete in all specimens examined. Pharynx long, slender, with sinuation anterior to proventricle (Fig. 1 C); trepan with 6 tricuspidate teeth inserted in lobate base (Figs 1 C, 2 E); proventricle extending for ~ 1.5 segments, with ~ 13 muscle cell rows (Fig. 1 A, C). Biology. One specimen showed intracoelomic oocytes in chaetigers 6���11 and long natatory chaetae, indicating that it was starting to reproduce by epigamy (Fig. 1 A). Remarks. The only species of Amblyosyllis reported from Brazilian waters (Nogueira 2000) is A. formosa (Clapar��de, 1863), which has longer falciger blades (80 ��� 40 ��m) than A. granosa (42 ��� 22 ��m) and a trepan with monocuspidate teeth (tricuspidate in A. granosa). However, we examined these Brazilian specimens identified as A. formosa and they actually belong to a different species, probably still undescribed. We do not include that species in the present paper because the state of preservation of the material available does not allow for a proper description of the species. Type locality. Strait of Magellan (Atlantic Ocean). Distribution. Pacific Ocean: Gal��pagos Islands. Atlantic Ocean: Strait of Magellan. First occurrence for the Brazilian coast.
Published as part of Fukuda, Marcelo V., Nogueira, Jo��o M. M. & Mart��n, Guillermo San, 2015, Eusyllinae and " Incertae sedis " syllids (Annelida: Syllidae) from South America, with a new species from Brazil and a new combination for a Peruvian species, pp. 507-537 in Zootaxa 3936 (4) on pages 509-511, DOI: 10.11646/zootaxa.3936.4.3, http://zenodo.org/record/233492
{"references":["Ehlers, E. (1897) Polychaeten. Hamburger Magalhaensische Sammelreise, 1897, 1 - 148.","Westheide, W. (1974) Interstitielle Fauna von Galapagos. XI. Pisionidae, Hesionidae, Pilargidae, Syllidae (Polychaeta). Mikrofauna des Meersbodens, 44, 195 - 338.","Verdes, A., Aguado, M. T. & San Martin, G. (2013) Re-description of some poorly known species of the family Syllidae (Annelida). Journal of the Marine Biological Association of the United Kingdom, 93 (8), 2109 - 2122. http: // dx. doi. org / 10.1017 / S 0025315413000660","Hartmann-Schroder, G. (1960) Polychaeten aus dem Roten Meer. Kieler Meeresforschungen, 16, 69 - 125.","Nogueira, J. M. M. (2000) Anelideos poliquetas associados ao coral Mussismilia hispida (Verril, 1868) em ilhas do litoral do Estado de Sao Paulo. Phyllodocida, Amphinomida, Eunicida, Spionida, Terebellida, Sabellida. Ph. D. Thesis, Instituto de Biociencias / USP, Sao Paulo, 265 pp.","Claparede, E. (1863) Beobachtungen uber Anatomie und Entwicklungsgeschichte wirbelloser Thiere an der Kuste von Normandie angestellt. Wilhelm Engelmann, Leipzig, 120 pp. http: // dx. doi. org / 10.5962 / bhl. title. 10030"]}