Syllis patriciae ( Hartmann-Schröder, 1981 ) Martín & Lucas & Hutchings, 2023

Martín, Guillermo San, Lucas, Yolanda & Hutchings, Pat, 2023, The genus Syllis Savigny in Lamarck, 1881 (Annelida: Syllidae: Syllinae) from Australia (Part 3): new species and redescription of previously described species, Zootaxa 5230 (3), pp. 251-295 : 273-275

Syllis patriciae ( Hartmann-Schröder, 1981) n. comb.

Figure 12

Typosyllis (Typosyllis) patriciae Hartmann-Schröder, 1981: 29 , Figs 37–42; 1982: 59; 1987: 35; 1989: 21.

Typosyllis patriciae .— Licher 1999: 90, fig. 43.

Material examined. AUSTRALIA, SOUTH AUSTRALIA: Port Lincoln, Billy Lights Point , 34° 45’ S, 135° 53’ E, coll. 15 Feb, 1985, I. Loch, 0 m, stones from sheltered intertidal rocks , AM W.53921, 1 specimen . WESTERN AUSTRALIA: Longreach Bay, Rottnest Island , 32° 00’ S, 115° 30’ E, coll. 25 June 2008 , T. Aguado & G. San Martín algae, 1 m , AM W.33400, 1 specimen . WA 524 , Houtman Abrolhos Islands, Goss Passage, south east end of Long Island , 28° 28’ 48” S, 113° 46’ 30” E, coll. 22 May 1994, 30 m, dead coral in calcareous substrate , AM W.53901, 2 specimens . WA 518 , Houtman Abrolhos Islands, Goss Passage, Beacon Island , 28° 25’ 30” S, 113° 47’ E, coll. 22 May 1994, 8 m, dead coral plates covered in coralline algae , AM W.53895, 1 specimen . Cape Range National Park, inshore limestone reef off Neds Camp , 21° 59’ S, 113° 55’ E, coll. 2 Jan 1984, 1 m, frilly Caulerpa, AM W. 5318, 1 specimen . WA 391 , Exmouth Gulf, beach at north end of Bundegi Reef , 21° 49’ S, 114° 11’ E, coll. 4 Jan 1984, 1–2 m, rocky rubble, coralline algae with green epiphyte , AM W.53922, 3 specimens . WA 362 , Kimberleys, Condilac Island , 14° 06’ S, 125° 33’ E, coll. 6 Jun 1988, P. Hutchings, 6 m, sand , AM W.29538, 6 specimens .

Diagnosis. Body slender. Dorsal cirri moderately long, alternating in length in midbody. Compound chaetae bidentate with short spines on margin; one of each parapodium slightly longer and slender than rest. Posterior aciculae acuminate. Pharynx long and slender.

Description. Longest complete specimen examined 6.7 mm long, 0.3 mm wide, with 59 chaetigers (up to 7.1 mm with 92 chaetigers; fide Hartmann-Schröder, 1982; Licher 1999). Body of medium size, slender, without colour pattern. Prostomium oval, with four eyes in trapezoidal arrangement and two anterior eyespots ( Fig. 12A ). Palps slightly shorter than prostomium. Median antenna arising between posterior eyes, with 19 articles, longer than combined length of prostomium and palps; lateral antennae distinctly shorter than median one, with 14 articles. Peristomium distinctly shorter than subsequent segments ( Fig. 12A ). Dorsal tentacular cirri similar in length to lateral antennae, with about 15 articles; ventral tentacular cirri slightly shorter than dorsal ones. Dorsal parapodial cirri relatively short, except some of anterior segments ( Fig. 12A ), with distinct coiled, dark, refracting inclusions in most articles, irregularly alternating long and short; long dorsal parapodial cirri similar in length to body width, with about 13–15 articles in midbody, short dorsal parapodial cirri in midbody with about 9–10 articles. Ventral parapodial cirri digitiform. Compound chaetae heterogomph falcigers, similar throughout body, with bidentate blades, both teeth similar, proximal tooth well marked ( Fig. 12C, D, E ); blades with short, thin, spines. On each parapodia, few (1–3) most dorsal falcigers with slender, elongated blades, and remaining shorter, more markedly bidentate ( Fig. 12C, D, E ). Anterior parapodia each with 10–12 compound chaetae; blades 26 μm long above, 13 μm long below ( Fig. 12C ); midbody parapodia with 8–9 compound chaetae each, blades 22 μm long above, 14 μm long below ( Fig. 12D ); posterior parapodia with 4–6 compound chaetae each, with blades 19 μm long above, 13 μm long below ( Fig. 12E ). Dorsal simple chaetae only on posterior parapodia, slightly bidentate ( Fig. 12F ). Ventral simple chaetae only on far posterior segments, slender, markedly bidentate ( Fig. 12G ).Anterior parapodia with three aciculae, one straight and two slightly acuminate ( Fig. 12H ); midbody parapodia with two aciculae, one straight and other markedly acuminate, subdistally inflated ( Fig. 12I ), solitary and strongly acuminate, subdistally inflated in posterior parapodia ( Fig. 12J, K ). Pharynx long, slender, extending through about nine segments; pharyngeal tooth on anterior margin of pharynx ( Fig. 12A ). Proventricle through 5–6 segments, with about 28–30 muscle cell rows. Pygidium with two anal cirri, similar to long dorsal cirri, and median stylus.

Habitat. From intertidal to 30 m, associated with sand, algae and coral rubble.

Distribution. Australia (SA, WA).

Figures

FIGURE 12. Syllis patriciae (Hartmann-Schröder, 1981 n. comb. AM W.29487. A, anterior end, dorsal view. B, long and short dorsal cirri, midbody. C, compound chaetae, anterior parapodium. D, compound chaetae, midbody parapodium. E, compound chaetae, posterior parapodium. F, dorsal simple chaeta. G, ventral simple chaeta. H, aciculae, anterior parapodium. I, aciculae, midbody parapodium. J, K, acicula, two views, posterior parapodium. Scale. A, B: 0.2 mm. C–K: 20 µm.