broad with enlarged subterminal tooth (Figure 30-108d); blade-length 

 ratios 1.3-1.9:1 anteriorly, 1-1.5:1 medially, 1-1.6:1 posteriorly. 

 Superior simple seta stout, distally bifid (Figure 30-108e), present 

 from midbody region. Inferior simple seta stout, strongly bidentate, 

 with few serrations below strong subterminal tooth (Figure 30-108f), 

 present posteriorly. Acicula slender, pointed. Pharynx extending to 

 setigers 5-11; margin denticulate with numerous irregular lobes or 

 teeth, surrounded by ten soft papillae; middorsal tooth large, subtermi- 

 nal. Proventricle extending from setigers 5-12 to 8-17, with 28 (23-33) 

 muscle cell rows. Ventricle occupying two setigers. Pharynx 1-1.7 

 times longer than proventricle; proventricle about 2-4 times longer than 

 wide. 



REMARKS: Dentatisyllis carolinae was originally identified in BLM-OCS 

 collections as Typosyllis regulata and T. regulata carolinae. 

 PREVIOUSLY REPORTED HABITAT: 7-30 m; shelly sand, very fine to coarse 

 sand. 



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

 30-107); 10-180 m; coarse to fine-very fine sand, silty fine to very 

 fine sand, sandy silt. 

 DISTRIBUTION: North Carolina to Florida, Gulf of Mexico. 



Dentatisyllis sp. A 



Figures 30-109, HOa-e 



MATERIAL EXAMINED: 

 Gulf of Mexico BLM-OCS: 



MAFLA 2315A-11/77 (1 spec, USNM 65669), 2315A-2/78 (2 spec). 

 DESCRIPTION: 



Length, 28.8+ mm; width, to 1.3 mm. Body large, elongate; all specimens 

 incomplete with up to 101 setigers. Prostoraium trapezoidal, widest 

 basally, with four lentigerous eyes (Figure 30-110a). Median antenna 

 with 29 articles, lateral antennae with 20-23 articles. Palps long, 

 broad basally, bluntly pointed distally. Dorsal tentacular cirri with 

 24-37 articles, ventral ones with 20-23 articles. Anterior dorsal cirri 

 long, with 27-60 articles. Ventral cirri long, cirriform, extending 

 well beyond parapodia anteriorly. Parapodia with short, digitiform pre- 

 and post setal lobes. Composite falcigers bidentate with short coarse 

 serrations anteriorly (Figure 30-110b,c). Inferior falcigers broad, 

 strongly bidentate, with long coarse serrations posteriorly (Figure 30- 

 llOd). Blade-length ratios 1.3:1 anteriorly, 1.7:1 medially. Pharynx 

 extending to setigers 11-13, surrounded anteriorly by about 10-13 soft 

 papillae; middorsal tooth subterminal; margin smooth to denticulate with 

 about 20 low rounded teeth (Figure 30-110e). Proventricle extending 

 from setigers 12-14 to 20-24, with 47-50 muscle cell rows. Pharynx and 

 proventricle about equal in length; proventricle about 4-5 times longer 

 than wide. 



REMARKS: Dentatisyllis sp. A is much larger and more robust than D. 

 carolinae , has relatively longer ventral cirri anteriorly, and a proven- 

 tricle with more muscle cell rows. 



GULF OF MEXICO BLM-OCS OCCURRENCE: One station near Florida Middle 

 Ground coral reef (Figure 30-109); 38 m; silty fine sand. 



30-115 



