Syllis monilaris Savigny in Lamarck, 1818

Martín, Guillermo San, Álvarez-Campos, Patricia & Hutchings, Pat, 2017, The genus Syllis Savigny in Lamarck, 1818 (Annelida: Syllidae: Syllinae) from Australia (second part): four new species and re-description of twelve previously described species, Zootaxa 4237 (2), pp. 201-243 : 225-228

publication ID

https://doi.org/ 10.11646/zootaxa.4237.2.1

publication LSID

lsid:zoobank.org:pub:494C759E-107E-4C5E-A8DC-3CE3DED035AF

DOI

https://doi.org/10.5281/zenodo.3510404

persistent identifier

https://treatment.plazi.org/id/A36887B9-5A43-FFDC-FF12-D0BD1C46F95D

treatment provided by

Plazi

scientific name

Syllis monilaris Savigny in Lamarck, 1818
status

 

Syllis monilaris Savigny in Lamarck, 1818 View in CoL

Figures 14 View FIGURE 14 , 15 View FIGURE 15 , 16 View FIGURE 16 A–C

Syllis monilaris Savigny in Lamarck, 1818: 318 View in CoL ; Savigny 1822: 44 –45, pl. 4, fig. 3; Savigny 1826: 372 –373, pl. IV, fig. 3; Licher, 1999: 292; Álvarez-Campos et al. 2015b: 322 View Cited Treatment , figs 1–5.

Syllis moniliformis View in CoL [sic; lapsus calami] Grube 1869: 502; Licher 1999: 306.

Material examined. AUSTRALIA, WESTERN AUSTRALIA: Houtman Abrolhos, NE entrance Goss Passage, Beacon Island , 28° 27' 54" S, 113° 46' 42" E, AM W.29492, 1 specimen, coll. 33 m, 25 May 1994, underneath boulders embedded in coral sand, by P. Hutchings. GoogleMaps

Comparative material. EGYPT: El Tor (Sinai Peninsula, Gulf of Suez), C.G. Ehrenberg coll., id. A.E. Grube, 2 specimens: ZMB F1941, NEOTYPE ; ZMB 11529, 1 smaller specimen, broken in two pieces. ENGLAND, off Folkestone, eastern English Channel , 51° 27’ 26’’ N, 13° 03’ 79’’ E, coarse sediment with Sabellaria spinulosa reef, 33 m, 22 June 2014, Folkestone Pomerania Survey, 3 specimens (collection of APEM Ltd.). GoogleMaps

Description. Body of large size, elongated ( Fig. 16 View FIGURE 16 A), complete, 33 mm long, 1 mm wide, with 133 chaetigers, tapered posteriorly ( Fig. 16 View FIGURE 16 A, C). Body opaque, dark, without colour pattern ( Figs 14 View FIGURE 14 A, 16A). Prostomium pentagonal; 4 eyes in trapezoidal arrangement. Palps robust, similar in length to prostomium ( Fig. 14 View FIGURE 14 A). Median antenna arising between posterior eyes, with 22 articles, slightly longer than combined length of prostomium and palps; lateral antennae shorter than median one, with 12–14 articles each. Peristomium shorter than subsequent segments ( Fig. 14 View FIGURE 14 A). Dorsal tentacular cirri shorter than median antenna, with about 16 articles each; ventral tentacular cirri about half length of dorsal ones, with 12 articles each. Dorsal parapodial cirri similar or longer than body width on anterior segments, becoming similar to shorter than body width from midbody backwards, and more or less fusiform, especially from midbody backwards ( Figs 14 View FIGURE 14 A–C, 16A–C), with well defined cirrophores and articles; articles basally and distally smaller than medially; anteriormost dorsal parapodial cirri longer than dorsal tentacular cirri, with 23–26 articles the longer ones, 16–17 the shorter ones ( Fig. 14 View FIGURE 14 A); at the proventricular level, all dorsal parapodial cirri become shorter and similar in length, with about 10–16 articles ( Fig. 14 View FIGURE 14 A, B), having 12-15 articles in midbody ( Fig. 14 View FIGURE 14 C, B); in posteriormost segments, dorsal parapodial cirri with 10–14 articles each, being shorter and smaller than those of midbody, ( Fig. 14 View FIGURE 14 D). Parapodia conical, distally bilobed on dorsal view ( Fig. 14 View FIGURE 14 A). Ventral parapodial cirri digitiform, longer than parapodial lobes on anterior parapodia, becoming shorter from midbody onwards ( Fig. 14 View FIGURE 14 B–D). Chaetae compound heterogomph falcigers, with thick shafts and short, triangular, unidentate blades, or very indistinctly bidentate with a minute proximal tooth, sometimes with short spines on margin but usually smooth or almost smooth and of similar shape and size throughout body ( Fig. 15 View FIGURE 15 A–C). Usually dorsalmost falciger of each parapodium with slightly thicker shaft than remaining ones, especially in midbody ( Fig. 15 View FIGURE 15 C). Anterior parapodia each with 9 compound chaetae, with blades slightly elongated, 57–39 µm long ( Fig. 15 View FIGURE 15 A); midbody parapodia with 4–6 compound chaetae each, 43–34 µm long ( Fig. 15 View FIGURE 15 B); posterior parapodia with 4–5 compound chaetae each, blades around 34 µm long ( Fig. 15 View FIGURE 15 C). Dorsal and ventral simple chaetae not seen. Anterior parapodia each with 3–4 small aciculae, distally blunt ( Fig. 15 View FIGURE 15 D); midbody parapodia with three aciculae, similar to those of anterior parapodia, but larger ( Fig. 15 View FIGURE 15 E) two distally blunt and the rest slightly acuminate aciculae in each posterior parapodia ( Fig. 15 View FIGURE 15 F). Pharynx extending through about 14 segments; pharyngeal tooth on anterior margin of pharynx. Proventricle through 13 segments; number of muscle cell rows not possible to count without dissection, since the body wall is quite opaque. Apparently, posterior part of body broken and regenerated ( Fig. 16 View FIGURE 16 C).

Remarks. This specimen agrees perfectly with the description of the neotype ( Álvarez-Campos et al. 2015b), with small differences in size, number of articles of some cirri and other minor details. Distribution. Red Sea, Australia (Western Australia), English Channel; some previous dubious reports from the Mediterranean.

ZMB

Museum f�r Naturkunde Berlin (Zoological Collections)

Kingdom

Animalia

Phylum

Annelida

Class

Polychaeta

Order

Phyllodocida

Family

Syllidae

Genus

Syllis

Loc

Syllis monilaris Savigny in Lamarck, 1818

Martín, Guillermo San, Álvarez-Campos, Patricia & Hutchings, Pat 2017
2017
Loc

Syllis moniliformis

Licher 1999: 306
Grube 1869: 502
1869
Loc

Syllis monilaris Savigny in Lamarck, 1818 : 318

Alvarez-Campos 2015: 322
Licher 1999: 292
Savigny 1826: 372
Savigny 1822: 44
Lamarck 1818: 318
1818
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