DESCRIPTION: 



Length, 2.5 mm; width, 0.15 mm. Body small, slender, complete with 21 

 setigers. Prostoraium rounded, fused dorsally with tentacular segment 

 (Figure 30-50a); eyes absent. Antennae fusiform, median antenna arising 

 near posterior edge of prostoraium, lateral antennae arising at anterior 

 margin of prostomium. Palps fused basally. Tentacular and dorsal cirri 

 slightly longer than body width, appearing biarticulate (Figure 30-50a). 

 Ventral cirri digitiform, shorter than parapodia. Pygidium with two 

 long, slender, faintly biarticulate cirri, each with short terminal 

 article. Parapodial glands absent. Superior simple seta stout, point- 

 ed, with numerous subdistal serrations (Figure 30-50b), present from 

 setiger 1. Composite falcigers with minutely bidentate blades (Figure 

 30-50c,d), blade-length ratio 2:1. Inferior simple seta with two small 

 teeth at nearly right angle (Figure 30-50e), present on posterior seti- 

 gers. Pharynx extending to setiger 3, with subterminal dorsal tooth and 

 ten distal papillae. Proventricle slender, located from setigers 3-5, 

 with 23 muscle cell rows. 



REMARKS: Parapionosyllis sp. B is unique among BLM-OCS members of this 

 genus in lacking eyes and parapodial glands, and in having biarticulate 

 dorsal cirri. 



GULF OF MEXICO BLM-OCS OCCURRENCE: One station off Panama City, Florida 

 (Figure 30-49); 45 ra; coarse sand. 



Parapionosyllis longicirrata (Webster and Benedict, 1884) 



Figures 30-51, 52a-g 



Sphaerosyllis longicirrata Webster and Benedict, 1884:715, pi. 8, figs. 



95-100. 



Parapionosyllis longicirrata — Pettibone, 1963:132, fig. 35e,f. 



Parapionosyllis longicirrata — Perkins, 1981:1102 [in part], fig. 9a-m. 



MATERIAL EXAMINED: 

 Gulf of Mexico BLM-OCS: 



SOFLA 20A-7/81 (4 spec, USNM 75297); MAFLA 2422C-7/76 (2 spec, USNM 

 65680), 2528J-11/77 (1 spec). 

 Supplementary Material: 



Massachusetts — Webster and Benedict ID. (USNM 479, types). 

 Florida — Tampa Bay, J. Taylor coll., T. Perkins ID. (1 spec, USNM 

 54170); offshore NE coast, 31°05'N, 80°35'W, G. Gaston ID. as Parapiono- 

 syllis sp. A (3 spec, USNM 56772). 

 DESCRIPTION: 



Length, to 3.2 mm (previously reported to 5 mm); width, to 0.2 mm 

 (previously reported to 0.3 mm). Body long, slender; complete specimens 

 with up to 40 setigers. Prostomium oval, with four small, lentigerous 

 eyes, and two ocular spots at base of palps (Figure 30-52a). Antennae 

 fusiform, about twice as long as prostomium. Palps straight, fused 

 dorsally over half their length. Tentacular and dorsal cirri subulate, 

 about twice as long as parapodia. Ventral cirri digitiform, shorter 

 than parapodia. Anal cirri paired, long, cirriform. Parapodial glands 

 dark-colored, medial to dorsal cirri, single anteriorly, becoming paired 

 starting on setigers 2-5 (Figure 30-52a). Superior simple seta with 

 small subdistal serrations anteriorly starting on setiger 1 (Figure 30- 

 52b), with shallow subdistal notch in addition to small serrations on 

 posterior setigers (Figure 30-52c). Composite falcigers unidentate with 



30-58 



