Spionidae Grube, 1850

Vı & Delgado-Blas, ctor H., 2008, Polydora and related genera (Polychaeta: Spionidae) from the Grand Caribbean region, Journal of Natural History 42 (1 - 2), pp. 1-19 : 3

Spionidae Grube, 1850

Key to the polydorid species from the Grand Caribbean region

1 Branchiae begin on chaetiger 2; chaetiger 5 with two types of major spines, one with expanded end bearing cusps without bristles; second, simple, falcate Boccardia salazari sp. nov.

- Branchiae begin on chaetigers 6–11; chaetiger 5 with one or two types of major spines, variously shaped................................. 2

2 Hooded hooks with constriction on shaft.......................... 3 - Hooded hooks without constriction on shaft............. 7 ( Dipolydora )

3 Major spines of chaetiger 5 of two types, first falcate, second pennoned, with both types arranged in U-shaped, double row; caruncle extending to chaetigers 6–7..................... Pseudopolydora floridensis sp. nov.

- Major spines of one type, falcate with a lateral tooth arranged in curved row, not U- or J-shaped; caruncle extending to chaetiger 3......... 4 ( Polydora )

4 Occipital antenna present............................. P. cornuta * - Occipital antenna absent...................................... 5

5 Two eyes; modified spines of chaetiger 5 falcate, with a lateral tooth; gizzardlike structure present..................... P. quintanarooensis sp. nov.

- Four eyes; modified spines of chaetiger 5 falcate, without lateral tooth; gizzard-like structure absent................................... 6

6 Modified spines of chaetiger 5 falcate, with lateral flanges or sheath. P. websteri * - Modified spines of chaetiger 5 falcate, with weakly developed lateral shelves

or knobs........................................ P. aggregata *

7 Occipital antenna present................... D. anatentaculata sp. nov. - Occipital antenna absent...................................... 8

8 Falcate spines present in posterior notopodia; major spines of chaetiger 5 falcate without companion chaetae...................... D. armata *

- Falcate spines absent in posterior notopodia; major spines of chaetiger 5 falcate with companion chaetae................................. 9

9 Prostomium bifid; caruncle present; branchiae from chaetiger 11; major spines of chaetiger 5 with two large accessory teeth on concave and convex sides; pygidium small, glandular, cuff-shaped with dorsal notch............................................... D. contoyensis sp. nov.

- Prostomium rounded; caruncle absent; branchiae from chaetiger 6; major spines of chaetiger 5 with long lateral flange; pygidium with anus surrounded by 4–14 papillae................................. D. commensalis *