Eunice gagzoi Augener 1922

Eunice gagzoi Augener, 1922

Eunice gagzoi Augener, 1922b:45.

MATERIAL EXAMINED.—Lectotype ZMH V-9755, paralectotype, ZMH V-6812, St Thomas, coll. Kröyer and Örsted (part of original material of Eunice cariboea Grube, 1856); paralectotype, ZMB 6286, St. Thomas, coll. Kükenthal and Hartmeyer.

COMMENTS ON MATERIAL EXAMINED.—The lectotype has been frontally dissected and the jaws are now missing as are several parapodia along the body.

DESCRIPTION.—Lectotype complete, of unknown sex, with 160 setigers; total length 32.5 mm; maximal width 1.5 mm at setiger 10; length through setiger 10, 2.75 mm. ZMH paralectotype complete, of unknown sex, with 105 setigers. ZMB paralectotype incomplete, of unknown sex, with 167 setigers.

Prostomium (Figure 50a) distinctly shorter than peristomium, about as wide as peristomium, as deep as of the peristomium. Prostomial lobes frontally rounded, dorsally flattened, tapering from junction to peristomium; median sulcus distinct ventrally and marked as shallow notch frontally, invisible dorsally. Eyes between bases of A-I and A-II. Antennae in shallow horseshoe, evenly spaced, similar in thickness. Ceratophores ring-shaped in all antennae, without articulations. Ceratostyles digitiform, without articulations. A-I to middle of anterior peristomial ring; A-II and A-III to setiger 1. Peristomium tapering anteriorly, with distinct muscular lower lip. Separation between rings distinct on all sides; anterior ring ∼ of total peristomial length. Peristomial cirri to middle of anterior peristomial ring, without articulations.

Maxillary formula of ZMB paralectotype 1+1, 6+6, 6+0, 4+8, and 1+1. Mx III part of distal arc with left Mx IV. Mx VI missing.

Branchiae (Figure 50g) present as single thick branchial filaments from setiger 120 in lectotype, from setiger 85 in ZMH paralectotype, and from setiger 115 in ZMB paralectotype. Branchiae increasing in length posteriorly up to last 5 setigers, about as long as body is wide where best developed, reduced over last 5 setigers to short, indistinct buttons on last setigers present. Branchiae present on less than 55% of the total number of setigers.

Anterior neuropodial acicular lobes (Figure 50f) asymmetrically rounded, becoming symmetrically rounded in posterior setigers; aciculae emerging at midline. Anterior presetal lobes low, transverse folds, considerably shorter than acicular lobes, increasing in relative length posteriorly and from about setiger 50 follow outline of acicular lobes closely. Anterior postsetal lobes higher than acicular lobes, symmetrically rounded, by setiger 25 postsetal lobes reduced to low folds following outline of acicular lobes closely. Anterior ventral cirri thick and tapering. Ventral cirri basally strongly inflated in setigers 10 to about setiger 30. Inflated bases thick, transverse welts; narrow tips tapering. Inflation rapidly reduced rapidly from setiger 30, from about setiger 45 ventral cirri short, slender and digitiform. Anterior notopodial cirri basally inflated, becoming shorter and more slender in posterior setigers, but always longer than ventral cirri, without articulations.

Limbate setae slender, marginally finely serrated. Pectinate setae (Figure 50e) very large, tapering, flat. Both marginal teeth longer than other teeth, ∼12 teeth present. Shafts of compound falcigers (Figure 50c,d) inflated, marginally coarsely and shallowly serrated. Appendages slender. Anterior appendages (Figure 50c) with nearly parallel sides and large heads, bidentate. Teeth similar in size. Proximal teeth tapering, directed obliquely distally. Distal teeth curved, directed obliquely distally. Guards asymmetrically bluntly pointed, marginally serrated; mucros absent. Posterior appendages (Figure 50d) tapering with small heads, bidentate. Proximal teeth smaller than distal teeth, tapering, directed obliquely distally. Distal teeth curved, directed obliquely distally. Guards increasingly symmetrically rounded in posterior setigers, marginally serrated; mucros absent. Pseudocompound falcigers and compound spinigers absent. Aciculae (Figure 50b) single, amber-colored, thick, abruptly tapering, distally bent. Subacicular hooks (Figure 50h) amber-colored, bidentate. Hooks first present from setiger 27–38, present in all setigers thereafter, always single (except for replacements). Hooks with distinctly inflated subdistal region and large, parrot-beak shaped heads. Proximal teeth very large, strongly curved. Distal teeth small, distinctly curved.

UNKNOWN MORPHOLOGICAL FEATURES.—Relationship between Mx III and left Mx IV; pygidium and anal cirri.

EXPECTED STATES OF UNKNOWN MORPHOLOGICAL FEATURES.—Mx III short and forming part of distal arc with left Mx IV.

CHARACTERS USED IN PREPARATION OF KEY NOT SCORED.—Inappropriate Characters: 22, 33, 34, 39–42, 56, 58, 59. Unknown Characters: 74, 78.

ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—None.