notopodia with few notosetae, and Ophiodromus having well-developed 

 notopodia with numerous notosetae. 



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



la. Notosetae capillary on middle and posterior parapodia (Figure 28- 

 16c) Podarke sp. A, p. 28-19 



lb. Notosetae furcate throughout (Figure 28-18c) 



Podarke obscura, p. 28-19 



Podarke sp. A 



Figures 28-15, 16a-e 



MATERIAL EXAMINED: 

 Gulf of Mexico BLM-OCS: 



MAFLA 2207C-7/76 (1 spec), 2313J-11/77 (1 spec, USNM 90631), 2318K- 

 8/76 (1 spec). 

 DESCRIPTION: 



Length, to 4.6 mm; width, to 0.7 aim. Body slender; one specimen nearly 

 complete with 28 setigers. Prostoraiura pentagonal, indistinctly bilobed, 

 with two pairs of large, lentigerous, contiguous eyes (Figure 28-lSa). 

 Antennae subulate, arising anteriorly on prostomium, lateral antennae 

 much longer than median antenna. Palps with long styles arising on 

 short bases below lateral antennae. Nuchal organs as narrow ridges 

 along postectal margins of prostomium. Tentacular cirri indistinctly 

 articled. Parapodia with stout dorsal cirrophores supported by single 

 slender acicula; neuropodia with bluntly rounded setal lobes and short- 

 er, conical postsetal lobes (Figure 28-16b). Dorsal cirri cirriform, 

 smooth to faintly articled. Ventral cirri short, clavate. Notopodia 

 apparently with furcate setae anteriorly (only one observed), replaced 

 by setiger 9 with solitary, extremely slender capillary setae often 

 having minutely bifid tips (Figure 28-16c). Neurosetae with long exten- 

 sion of shaft-head entire; blades long to short, lightly serrate, with 

 faint spine below hooked tip (Figure 28-16d), blade-length ratio 5-7:1. 

 Posterior parapodia with additional slender, dentate, simple neuroseta 

 (Figure 28-16e). Pharynx extending to setigers 7-10. 



REMARKS: These specimens were originally identified as Podarke agilis 

 Ehlers, 1864, from which they apparently differ in having furcate noto- 

 setae anteriorly. 



GULF OF MEXICO BLM-OCS OCCURRENCE: Numerous occurrences in northeastern 

 Gulf (Figure 28-15); 11-177 m; coarse to fine-very fine sand, silty fine 

 sand, clayey sandy silt. 



Podarke obscura Verrill, 1873 

 Figures 28-17, 18a-f 



Podarke obscura — Pettibone, 1963:104, fig. 28a, b. 

 Podarke obscura — Gardiner, 1976:118, fig. 8i-k. 



MATERIAL EXAMINED: 



Gulf of Mexico BLM-OCS: 



SOFLA 2-12/80 (2 spec, USNM 75326), 20-7/81 (3 spec, USNM 75327), 20A- 



28-19 



