Syllis narranuk Martín & Lucas & Hutchings 2023, n. sp.
Syllis narranuk n. sp. Figures 7, 8 Material examined. AUSTRALIA, WESTERN AUSTRALIA: St. 115, Kimberleys, Shirley Island, 16° 17’ S, 123° 26’ E, coll. 20 July 1988, by P. Hutchings, Holotype, AM W.53791. Diagnosis. Body slender. Dorsal cirri slender, alternating long and short on midbody. Two kinds...
| Main Authors: | , , |
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| Format: | Other/Unknown Material |
| Language: | unknown |
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2023
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| Online Access: | https://zenodo.org/record/7561349 https://doi.org/10.5281/zenodo.7561349 |
| Summary: | Syllis narranuk n. sp. Figures 7, 8 Material examined. AUSTRALIA, WESTERN AUSTRALIA: St. 115, Kimberleys, Shirley Island, 16° 17’ S, 123° 26’ E, coll. 20 July 1988, by P. Hutchings, Holotype, AM W.53791. Diagnosis. Body slender. Dorsal cirri slender, alternating long and short on midbody. Two kinds of spiniger-like chaetae, one with longer blades, both unidentate, with short spines on margin basally, apparently smooth distally; falcigers slender, slightly bidentate, with long and fine spines on margin. Posterior aciculae acuminate. Description. Holotype complete specimen, 6 mm long, 0.28 mm wide, with 80 chaetigers. Body relatively small, slender, filiform, without colour pattern. Prostomium oval; four small eyes in trapezoidal arrangement and pair of anterior minute eyespots. Palps broad, slightly longer than prostomium (Fig. 7A). Median antenna arising between posterior eyes, with about 16 articles, somewhat longer than combined length of prostomium and palps together; lateral antennae shorter than median one, with about 12 articles. Peristomium dorsally distinctly shorter than subsequent segments (Fig. 7A). Dorsal tentacular cirri similar in length or shorter than median antenna; ventral tentacular cirri about half the length of dorsal ones. Dorsal parapodial cirri of chaetigers 1 and 4 longer than remaining, with about 19 articles, those of chaetiger 2 and 3 shorter, with 10–11 articles, remaining dorsal cirri alternating long and short; in midbody, long ones with about 14 articles; short ones with nine articles, all shorter than body width (Fig. 7B). Parapodia conical. Ventral parapodial cirri digitiform, shorter than parapodial lobes. Compound chaetae of each parapodium with long pseudospinigers (Fig. 8A, E, I), short pseudospinigers (Fig. 8B, F, J) and falcigers (Fig. 8C, G, K); all types of chaetae with slender shafts and elongated, thin blades, with moderate to long, very thin spines on margin. Spiniger-like chaetae unidentate and apparently smooth distally; falcigers slightly bidentate, with a minute ... |
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