Trypanosyllis sp. B 



Figures 30-83, 84a-e 



MATERIAL EXAMINED: 

 Gulf of Mexico BLM-OCS: 



MAFLA 2528K-11/77 (1 spec), 2534E-9/75 (1 spec, USNM 65697). 

 DESCRIPTION: 



Length, 4.4+ mm; width, to 0.65 mm. Body long, narrow, dorsoventrally 

 flattened, uncolored in preservative; both specimens incomplete. Pro- 

 stomium rectangular, shallowly notched posteriorly, with four large, 

 lentigerous eyes (Figure 30-84a) and small ventral eyespots. Median and 

 lateral antennae each with eight articles, arising at anterior margin of 

 prostomium. Palps blunt, well-separated, shorter than prostomium. Dor- 

 sal tentacular cirri with seven articles, ventral ones with six. Dorsal 

 cirri spindle-shaped, with six articles anteriorly, 5-8 articles in 

 midbody region. Ventral cirri auricular, extending beyond parapodia. 

 Anal cirri not observed. Superior composite falcigers with finely 

 serrate, bidentate blades (Figure 30-84b). Inferior composite falcigers 

 shorter, with finely serrate, bidentate blades anteriorly (Figure 30- 

 84c), with unidentate or subbidentate blades (Figure 30-84d,e) in medial 

 and posterior regions. Simple setae not observed. Acicula thick, 

 pointed, emergent, numbering two anteriorly. Pharynx extending to seti- 

 gers 10-13; trepan not observed. Proventricle extending from setigers 

 11-14 to 14-18, with about 21 muscle cell rows. Proventricle half as 

 long as pharynx and 1.3-1.5 times longer than wide. One specimen having 

 posterior region, beginning with setiger 29, modified into stolon pos- 

 sessing eyes, swimming setae and gametes. 



REMARKS: Trypanosyllis sp. B in BLM-MAFLA collections was confused with 

 T. coeliaca , from which it differs in having inferior composite falci- 

 gers with unidentate to subbidentate blades. 



GULF OF MEXICO BLM-OCS OCCURRENCE: Two stations off Panama City, Flori- 

 da (Figure 30-83); 37-73 m; coarse sand. 



Trypanosyllis parvidentata Perkins, 1981 

 Figures 30-85, 86a-e 



Trypanosyllis parvidentata Perkins, 1981:1161, fig. 36a-h. 



MATERIAL EXAMINED: 

 Gulf of Mexico BLM-OCS: 



MAFLA 2211J-7/76 (1 spec), 2211F-8/77 (1 spec), 2533F-7/76 (1 spec), 

 2533H-7/76 (2 spec), 2535-9/75 (1 spec, USNM 55837). 

 Supplementary Material: 



Florida--Hutchinson Island, St. Lucie County, T. Perkins ID., 10.0 m 

 (FSBC I 23683, 1 paratype), 10.6 m (FSBC I 23684, 1 paratype). 

 DESCRIPTION: 



Length, 9.5+ mm (previously reported to 10 mm); width, to 0.8 mm (pre- 

 viously reported to 0.45 mm). Body small, dorsoventrally flattened, 

 uncolored in preservative; all specimens incomplete with up to 28 seti- 

 gers. Prostomium trapezoidal, widest anteriorly, with four lentigerous 

 eyes (Figure 30-86a), with or without dorsal and ventral ocular spots. 

 Antennae arising near anterior margin of prostomium; median antenna with 

 10-20 articles, lateral antennae with 9-15 articles. Palps separated, 

 pointed, as long as prostomium. Dorsal tentacular cirri with 12-24 



30-91 



