coarse serrations and subterminal spine (Figure 30-52d-f), blade-length 



ratio 2:1; large prong of shaft-heads curved outward on posterior seti- 



gers (Figure 30-52f). Inferior simple seta of posterior region bluntly 



falcate (Figure 30-52g). Acicula with somewhat enlarged, knobbed tips. 



Pharynx extending to setigers 2-3, with small subterminal middorsal 



tooth. Proventricle located in setigers 3-4 or 4-5, with about 14 



indistinct muscle cell rows. 



REMARKS: Material examined by Perkins (1981:1102) includes specimens 



e Tarred below to Parapionosyllis sp. A. 



PREVIOUSLY REPORTED HABITAT: Low water to 38 m; shells, muddy sand, 



among tubes of small maldanids, calcareous sand, fossil coral. 



GULF OF MEXICO BLM-OCS OCCURRENCE: Three scattered records off Florida 



(Figure 30-51); 22-37 m; coarse to medium-fine sand. 



DISTRIBUTION: Massachusetts, Florida, Gulf of Mexico. 



Parapionosyllis sp. A 



Figures 30-53, 54a-e 



Parapionosyllis longicirrata — Gardiner, 1976:133, fig. llo-r. 

 Parapionosyllis longicirrata — Perkins, 1981:1102 [in part]. 



MATERIAL EXAMINED: 

 Gulf of Mexico BLM-OCS: 



SOFLA 20A-7/81 (1 spec, USNM 89895); MAFLA 2422C-7/76 (1 spec), 2423B- 

 7/76 (1 spec), 2423C-7/76 (2 spec), 2423D-7/76 (1 spec, USNM 55823), 

 2423E-7/76 (1 spec). 

 Supplementary Material: 



North Carolina — off Beaufort, 34°34'N, 76°25'W, 20 m, sand and broken 

 shell, J. H. Day coll. /ID. (as Parapionosyllis longicirrata , 4 spec, 

 USNM 51070). 

 DESCRIPTION: 



Length, to 7.3 mm; width, to 0.3 mm. Body long, slender; complete 

 specimens with up to 49 setigers. Prostomium cordate, with four small 

 eyes, or with large conglomerates of pigment spots across posterior 

 portion (Figure 30-54a). Antennae fusiform to subulate. Palps 

 straight, fused basally. Tentacular and dorsal cirri subulate, shorter 

 than antennae. Ventral cirri clavate to cirriform, sometimes extending 

 beyond parapodia. Anal cirri paired, long, cirriform. Parapodial 

 glands medial to dorsal cirri, single anteriorly, becoming paired usual- 

 ly from setiger 5. Superior simple seta present from setiger 1, with 

 several stout, subdistal serrations, becoming thicker posteriorly (Fig- 

 ure 30-54b). Composite falcigers unidentate with coarse serrations, 

 sometimes with subterminal spine (Figure 30-54c-e), blade-length ratio 

 about 3:1 anteriorly, 2:1 posteriorly; large prong of shaft-head curved 

 outward posteriorly. Inferior simple seta, present on far posterior 

 setigers, similar to that of Parapionosyllis longicirrata. Acicula with 

 somewhat enlarged, knobbed tips. Pharynx extending to setigers 3-4, 

 with small, subterminal middorsal tooth. Proventricle extending from 

 setigers 3-4 to 5-6, with about 15 indistinct muscle cell rows. 

 REMARKS: Some specimens from North Carolina and from the Gulf of Mexico 

 identified as Parapionosyllis longicirrata represent a separate species, 

 herein designated Parapionosyllis sp. A, which differs from the former 

 on the basis of setal blade-length ratios and serrations of the superior 

 simple setae. 



30-60 



