Eunice atlantica Kinberg 1865

Eunice atlantica Kinberg, 1865

Eunice atlantica Kinberg, 1865:563; 1910:42, pl. 16: fig. 18.—Hartman, 1948:79.

MATERIAL EXAMINED.—Holotype, RM 325, Praya Grande near Rio de Janeiro, Eugenie Expedition 305.

COMMENTS ON MATERIAL EXAMINED.—The type material consists of 4 fragments, one of which is an anterior end. The 3 other fragments consists of 9 segments, 5 segments, and a single segment; these fragments must be from the median to posterior part of the body in that they lack branchiae and have subacicular hooks, assuming a common configuration of features. The shape of the compound hooks, aciculae, and limbate setae indicate that the median fragments came from a specimen of the same species as the anterior fragment, perhaps from the same specimen.

DESCRIPTION.—Anterior fragment with 9 setigers, of unknown sex; length 4 mm; width 2 mm.

Prostomium distinctly shorter than peristomium. Prostomial lobes frontally rounded, dorsally flattened; median sulcus shallow. Ceratophores ring-shaped in all antennae, without articulations. Ceratostyles tapering, with up to 5 cylindrical articulations. A-I to middle of peristomium; A-II to setiger 1; A-III now broken (to segment 5 according to Kinberg, 1865). Peristomium cylindrical. Separation between rings distinct on all sides; anterior ring of total peristomial length. Peristomial cirri to posterior third of prostomium, slender and tapering, with 3 cylindrical articulations.

Jaws not examined.

Branchiae from setiger 3; first branchiae single; maximum 5 digitiform filaments.

Parapodial shapes indeterminable.

Limbate setae longer than other setae, slender, marginally serrated. Pectinate setae not seen. Shafts of compound falcigers (Figure 16f) inflated, marginally coarsely serrated; distal beak present. Appendages long, narrow, tapering, bidentate. Proximal teeth short, reduced triangular, directed basally. Distal teeth slender, distally hooked, tapering, directed laterally. Guards distally symmetrically rounded, with distinct, slender mucros (Figure 16f, i), marginally smooth. Pseudocompound falcigers and compound spinigers absent. Aciculae paired, yellow, tapering, straight or gently curved (Figure 16h). Subacicular hooks (Figure 16g) yellow, tridentate with teeth in a crest. Primary fangs large, curved basally; 2 distal fangs with common stem; tertiary fangs very small. Distribution of subacicular hooks unknown.

UKNOWN MORPHOLOGICAL FEATURES.—All features associated with mid-body and posterior parts of the body; jaw structure.

EXPECTED STATE OF SELECTED UNKNOWN FEATURES.—The species is too poorly known to yield meaningful predictions.

CHARACTERS USED IN PREPARATION OF KEY NOT SCORED.—Inappropriate Characters: None known. Unknown Characters: 1, 2, 4–6, 11–17, 32, 34, 36–38, 40, 42–59, 61–68, 80–82.

ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—33,2; 37,2; 38,2; 53,1; 57,2.