Genus Dentatisyllis Perkins, 1981 



TYPE SPECIES: Syllls ( Typosyllis) regulata carolinae Day, 1973. 



REFERENCE: 



Perkins, 1981:1166. 



DIAGNOSIS: Body cylindrical. Prostomium with three antennae. Nuchal 



organs as small, ciliated lobes between prostomium and peristomium. Two 



pairs of tentacular cirri. Antennae, tentacular, and dorsal cirri 



articled. Pharynx with subterminal middorsal tooth and denticulate 



margin. 



Key to the Gulf of Mexico BLM-OCS Species of Dentatisyllis 



la. Proventricle with 23-33 muscle cell rows; ventral cirri extending 



just beyond parapodia in anterior region 



Dentatisyllis carolinae, p. 30-113 



lb. Proventricle with 47-50 muscle cell rows; ventral cirri extending 



well beyond parapodia in anterior region (Figure 30-110a) 



Dentatisyllis sp. A, p. 30-115 



Dentatisyllis carolinae (Day, 1973) 

 Figures 30-107, 108a-f 



Syllis ( Typosyllis) regulata carolinae Day, 1973:30, fig. 4a-f. 



Syllis ( Typosyllis ) regulata carolinae — Gardiner, 1976:141, figs. 12x-z, 



13a. 



Dentatisyllis carolinae — Perkins, 1981:1166, fig. 38a-h. 



MATERIAL EXAMINED: 

 Gulf of Mexico BLM-OCS: 



SOFLA 20E-11/80 (6 spec, USNM 75277), 20B-7/81 (2 spec, USNM 75276); 

 MAFLA 2207D-8/77 (1 spec), 2211B-7/76 (1 spec), 2211H-7/76 (4 spec), 

 2315A-8/76 (1 spec), 2423B-7/76 (2 spec), 2423-7/76 (1 spec, USNM 

 55831), 2528G-6/75 (1 spec), 2530H-6/75 (1 spec), 2531F-2/78 (4 

 spec . ) . 



Supplementary Material: 



North Carolina — 34°34'N, 76°25'W, 20 m, broken shells, J. H. Day coll. 

 (USNM 43146, holotype). 

 DESCRIPTION: 



Length, to 20.3 mm (previously reported to 20 ram); width, to 0.7 mm 

 (previously reported to 0.6 mm). Body slender, thread-like; complete 

 specimens with up to 119 setigers. Prostomium rounded, with four small 

 eyes, and up to two ocular spots at base of palps medial to lateral 

 antennae (Figure 30-108a). Median antenna with 15-38 articles, lateral 

 antennae with 10-23 articles. Palps blunt, nearly twice as long as 

 prostomium. Dorsal tentacular cirri with 11-33 articles, ventral ones 

 with 7-20 .rticles. Dorsal cirri long, moniliform, alternating in 

 length, with 7-49 articles anteriorly and 6-46 articles medially. Ven- 

 tral cirri sler er, extending just beyond parapodia. Pygidium with two 

 lateral cirri having 15-47 articles, and single, slender, midventral 

 cirrus. Composite falcigers slender, bidentate. with long serrations 

 anteriorly (Figure 30-108b). Superior composite falcigers slender with 

 coarsely serrate blades posteriorly (Figure 30-108c); inferior falcigers 



30-113 



