Syllls ( Typosyllls ) sp. E 30-145 



Syllts ( Typosyllls ) gerlachi (Hartmann-Schroder , 1960) 30-145 



Syllis ( Typosyllis ) sp. B 30-148 



Syllls ( Typosyllis ) prolifera Krohn, 1852 30-150 



Key to the Subfamilies and Genera of Syllidae from 

 the Gulf of Mexico BLM-OCS Programs 



la. Ventral cirri absent; pharynx coiled or sinuous; nuchal organs as 

 epaulettes (Figures 30-2a, 6a) (subfamily Autolytinae) 4 



lb. Ventral cirri present; pharynx usually straight; nuchal organs 

 usually not as epaulettes 2 



2a. Adults small, usually less than 10 mm in length; palps fused at 

 least half their length (subfamily Exogoninae) 6 



2b. Adults larger, up to several centimeters in length; palps maximal- 

 ly fused basally. 3 



3a. Palps fused basally; dorsal cirri smooth at least basally; body 

 cylindrical (subfamily Eusyllinae) 8 



3b. Palps usually not fused basally; dorsal cirri articled or globu- 

 lar; body cylindrical or flattened (subfamily Syllinae). ... 17 



4a. Superior simple setae (bayonet-setae) thick-shafted (Figure 30- 



2c); nuchal epaulettes short, reaching setiger 1 or 2 



Proceraea, p. 30-8 



4b. Superior simple setae (bayonet-setae) thin-shafted (Figure 30-4c); 

 nuchal epaulettes variable in length 5 



5a. Dorsal cirri cylindrical (Figure 30-6a). . . . Autolytus, p. 30-10 

 5b. Dorsal cirri flattened (Figure 30-8a) Myrianida, p. 30-15 



6a. Two pairs of tentacular cirri; dorsal cirri clavate to digitiform 

 (Figure 30-12a) Brania, p. 30-16 



6b. One pair of tentacular cirri; dorsal cirri subulate to onion- 

 shaped (Figure 30-20a) or ovoid (Figure 30-30a) 7 



7a. Dorsal cirri subulate to onion-shaped (Figure 30-20a); body with 

 small papillae (Figure 30-20a) Sphaerosyllis, p. 30-24 



7b. Dorsal cirri ovoid (Figure 30-30a); body without papillae 



Exogone, p. 30-34 



8a. Pharynx unarmed; dorsal cirri smooth or distally articled (Figure 

 30-42a) 9 



8b. Pharynx armed with one or a series of teeth; dorsal cirri smooth 

 (Figure 30-60a), irregularly wrinkled (Figure 30-74a), or indis- 

 tinctly articled (Figure 30-62a) 11 



9a. Anterior parapodia with large, knobbed acicula (Figure 30-46b); 

 anterior composite falcigers with modified shaft-heads (Figure 30- 

 46d,e) 10 



9b. Anterior parapodia with slender acicula; anterior composite falci- 

 gers without modified shaft-heads Syllides, p. 30-45 



30-6 



