Polydora and related genera (Polychaeta: Spionidae) from the Grand Caribbean region Author Vı Author Delgado-Blas, ctor H. text Journal of Natural History 2008 2008-01-31 42 1 - 2 1 19 http://dx.doi.org/10.1080/00222930701831240 journal article 10.1080/00222930701831240 1464-5262 4651778 Pseudopolydora floridensis sp. nov. ( Figure 5 ) Type material Atlantic coast: Lake Worth , Florida (26 ° 369N, 80 ° 039W ), 29 May 1974 , holotype (USNM-1073346); Lake Worth , 29 May 1979 , one paratype ; coll. J. Garcı «a, 29 May 1979 , two paratypes (ECOSUR-0086) . Description Holotype Incomplete specimen with 39 anterior segments, 14 mm long, 1.6 mm wide at chaetiger 3– 6. Prostomium T-shaped, with two anterolateral processes. Four black eyes present in trapezoidal arrangement. Caruncle extending posteriorly to chaetiger 7. Occipital antenna present ( Figure 5A ). Peristomium wider than long, expanded laterally ( Figure 5B ). Palps extending posteriorly for 14 segments. Body and palp pigments absent. Chaetiger 1 well separated from peristomium; long cirriform notopodial lamellae and triangular neuropodial lamellae; neuropodial lamellae longer than following segments ( Figure 5A ); unilimbate neurochaetae present; notochaetae absent. Chaetigers 2–4 with well-developed notopodial fascicles of unilimbate chaetae arranged in two rows: shortest and thickest chaetae in anterior row ( Figure 5C ); posterior row longer than anterior row, with chaetae becoming longer in upper side of fascicle ( Figure 5D ), and lower side shorter and thinner than chaetae from first row ( Figure 5E ); in middle and posterior segments with tufts of two types of chaetae: unilimbate chaetae ( Figure 5F ), and serrated chaetae ( Figure 5G ) thinner and shorter than unilimbate chaetae. Neuropodia of chaetigers 2–4, 6 and 7 with dense fascicle of broad bilimbate capillary chaetae. Bidentate hooded hooks from chaetiger 8, not accompanied by capillaries, with up to 25 hooks per fascicle; hooks with reduced angle between teeth and a constriction on shaft ( Figure 5H ). Chaetiger 5 similar in size and shape to chaetigers 4 and 6; noto- and neuropodial postchaetal lamellae well developed; with superior dorsal geniculate unilimbate capillaries ( Figure 5I ), fewer in number than those chaetae on chaetigers 4 or 6, and ventral winged capillaries ( Figure 5J ). Two kinds of major spines arranged in a Ushaped double row, with pennoned spines in outer row and falcate spines in inner row; pennoned spines with curved tip and constriction between tip and shaft ( Figure 5K ), numbering up to 16 per fascicle; falcate spines with a subterminal protuberance ( Figure 5L ), numbering up to 14 per fascicle. Figure 5. Pseudopolydora floridensis sp. nov. (ECOSUR-0086). (A) Anterior region, dorsal view; (B) anterior region, ventral view; (C) notochaeta, anterior row; (D) notochaeta from dorsal side from fascicle; (E) notochaeta of ventral side from fascicle; (F) notochaeta of posterior segment; (G) notochaeta of posterior segment; (H) hooded hook of anterior segment; (I) chaetiger 5 notochaeta; (J) chaetiger 5 neurochaeta; (K, K9) spines of outer row of chaetiger 5; (L) spines of inner row of chaetiger 5. Scale bars: 295.6 mm (A); 500 mm (B); 25 mm (C–K, L); 20 mm (K9). Branchiae on chaetigers 7–38; all basally free from notopodial lamellae. Glandular pouches largest and paired in segments from chaetiger 6–7 ( Figure 5A ), pouches not evident in other segments. Gizzard-like structure in intestinal tract absent. Pygidium unknown. Female, with oocytes developing in clusters in chaetigers 20–39. Variability Largest specimen holotype ; paratypes smaller, with T-shaped prostomium. Four red eyes in trapezoid arrangement. Palps extending posteriorly for 14 segments. Caruncle extending to chaetigers 6–7. Major spines of chaetiger 5 arranged in a U-shaped double row; with 14–21 pennoned spines, and 11–16 falcate spines. Branchiae from chaetiger 7, continuing to chaetiger 27. Hooded hooks from chaetiger 8, with up to 15–27 hooks per fascicle. Ecology Inhabits muddy-sand tubes in soft bottoms. Remarks Pseudopolydora floridensis sp. nov. is similar to P. corniculata Radashevsky and Hsieh, 2000 in the shape of the peristomium and notopodial lamellae on chaetiger 1, caruncle extending over chaetiger 6, and large paired glandular pouches present in chaetigers 6 and 7; P. floridensis differs from P. corniculata in having triangular neuropodial lamellae in chaetiger 1 instead of ciriform lamellae, chaetiger 5 with spines arranged in a U-shaped double row instead of a weak J-shaped almost vertical row, major spines with a subterminal protuberance instead of simple spine with slightly bent tips. Etymology The specific name refers to the collecting site. Distribution Atlantic coast: Lake Worth , Florida .