GULF OF MEXICO BLM-OCS OCCURRENCE: Common in northeastern Gulf and one 

 station off Brownsville, Texas (Figure 30-113); 10-189 in; coarse to 

 fine-very fine sand, silty fine to very fine sand, clayey to sandy silt. 

 DISTRIBUTION: Cosmopolitan. 



Syllis (Ehlersia) ferrugina (Langerhans, 1881) 

 Figures 30-115, 116a-h 



Ehlersia ferrugina Langerhans, 1881:104, pi. 4, fig. 10a, b. 



Syllis ( Ehlersia) ferrugina— Fauvel, 1923:269, fig. lOOk-n. 



Syllis ( Langerhansia ) ferrugina — Day, 1967:244, fig. 12.2. o-r; 1973:29, 



fig. 4n-q. 



Ehlersia ferrugina — Laubier, 1968:85, fig. 3. 



Syllis ( Langerhansia) ferrugina — Gardiner, 1976:140, fig. 12t, u. 



MATERIAL EXAMINED: 

 Gulf of Mexico BLM-OCS: 



SOFLA 24B-11/80 (4 spec, USNM 75302); MAFLA 11F-5/74 (1 spec), 2207F- 

 11/77 (1 spec), 2211E-7/76 (1 spec), 2211H-7/76 (1 spec), 22111-11/77 

 (2 spec), 2422F-7/76 (1 spec), 2531C-8/77 (1 spec), 2534-9/75 (1 

 spec, USNM 55828); STOCS HR1-5 3/76 (3 spec), HR1-2 7/76 (2 spec, 

 USNM 75225), HR1-5 7/76 (3 spec, USNM 75226), SB3-4 8/76 (1 spec, USNM 

 75227). 

 DESCRIPTION: 



Length, to 15.6 mm (previously reported to 10 mm); width, to 0.5 mm 

 (previously reported to 0.4 mm). Body long, slender; complete specimens 

 with up to 100 setigers. Prostoraium oval, with four lentigerous eyes, 

 and two ocular spots near base of palps (Figure 30-116a). All antennae, 

 tentacular and dorsal cirri sometimes appearing smooth; otherwise median 

 antenna with up to 33 articles, lateral antennae with up to 16 articles. 

 Palps oval. Dorsal tentacular cirri with up to 19 articles, ventral 

 ones with up to six articles. Anterior dorsal cirri with up to 25 

 articles, becoming smooth and filiform medially. Ventral cirri digiti- 

 forra, not extending beyond parapodia. Pygidium with paired anal cirri 

 having up to 13 articles, plus short midventral cirrus. Anterior falci- 

 gers with long, finely serrate, bidentate blades (Figure 30-116b,c). 

 Superior setae becoming spiniger-like medially (Figure 30-116d) and 

 inferior falcigers becoming short-bladed with large subterminal tooth 

 (Figure 30-116e). Blade-length ratios 2.2-4.3:1 anteriorly, 6.4-11.4:1 

 medially, 4.8-9.3:1 posteriorly. Superior and inferior simple setae 

 slender, bidentate (Figure 30-116f,g) present posteriorly; superior 

 simple seta sometimes thick, distally truncate and bi- or trifid (Figure 

 30-116h). Pharynx extending to setigers 1-10; middorsal tooth subter- 

 minal. Proventricle extending from setigers 2-11 to 7-13, with 20 (15- 

 23) muscle cell rows. Ventricle occupying up to four setigers. Pharynx 

 0.6-2.3 times longer than proventricle; proventricle 1.5-2.6 times long- 

 er than wide. 



PREVIOUSLY REPORTED HABITAT: Intertidal to 130 m; medium sand. 

 GULF OF MEXICO BLM-OCS OCCURRENCE: Common in northeastern Gulf plus 

 several stations off Texas (Figure 30-115); 10-180 m; coarse to fine- 

 very fine sand, silty fine to very fine sand, sandy silt. 

 DISTRIBUTION: Europe, Mediterranean, N. and S. Atlantic, N. Carolina, 

 Gulf of Mexico, S. Pacific, S. W. Australia. 



30-122 



