Eunice investigatoris Fauvel 1932

Eunice investigatoris Fauvel, 1932

Eunice investigatoris Fauvel, 1932:137–138, fig. 19a–f.

DESCRIPTION.—The type of this species, described from 45 m depth in the Persian Gulf, is not available. The description is sufficiently detailed to allow some comments.

Numbers of setigers not indicated. Specimen complete; total length 110 mm; width 7 mm.

Antennae similar in thickness. Ceratophores ring-shaped in all antennae, without articulations. Ceratostyles slender and tapering, without articulations. A-I presumably to setiger 1-2; A-II and A-III to setiger 6 or 7.

Branchiae present, pectinate, distinctly longer than notopodial cirri, reduced in mid-body region, erect. Branchiae from setiger 6 to near posterior end, present on more than 65% of total number of setigers. Maximum 18–20 filaments at about setiger 14. Branchiae “reduced in size” in middle of body, “increase very much” in posterior end. Branchiae in median and especially posterior regions dichotomously or trichotomously regularly branched.

Anterior ventral cirri tapering, becoming basally inflated in early branchial setigers. Narrow tips tapering. Ventral cirri without inflated bases in posterior half of body, increasingly long and slender in far posterior setiger, up to twice as long as neuropodial lobes. Notopodial cirri long in anterior setigers, becoming shorter than branchiae in branchial region, without articulations.

Pectinate setae with either 1 or both marginal teeth longer than other teeth, with 8–10 teeth. Shafts of compound falcigers inflated, marginally smooth. Appendages thick, tapering, bidentate. Proximal teeth larger than distal teeth, triangular, directed laterally. Distal teeth very short, slender, bent. Guards symmetrically rounded; mucros absent. Pseudocompound falcigers and compound spinigers absent. Aciculae black, tapering, straight; cross-sections round. Subacicular hooks black, bidentate. Hooks first present from setiger 44–45, present in all setigers thereafter, always single (except for replacements). Hooks with inflated median shafts; heads small. Proximal teeth directed laterally. Distal teeth smaller than proximal teeth, directed obliquely distally.

UNKNOWN MORPHOLOGICAL FEATURES.—Many features of all parts of the body.

EXPECTED STATES OF SELECTED UNKNOWN FEATURES.—None.

CHARACTERS USED IN PREPARATION OF KEY NOT SCORED.—Inappropriate Characters: 22, 56, 58, 59. Unknown Characters: 1, 4–16, 24–29, 36, 39, 40, 43–51, 54, 65–68, 74, 78.

ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—None.