Eunice bottae Quatrefages 1866

Eunice bottae Quatrefages, 1866

Eunice bottae Quatrefages, 1866:320.—Grube, 1870a:292.

MATERIAL EXAMINED.—Holotype, MNHN, Paris, A.1(R.)- 1868-no. 55b, Red Sea, coll. Botta.

DESCRIPTION.—Holotype incomplete with 60 setigers; length 28 mm; maximum width 2 mm at about setiger 40. Length through setiger 10,7 mm; width at setiger 10,1.75 mm. Body slender, cylindrical, becoming somewhat dorsally flattened towards posterior end.

Prostomium (Figure 25a) distinctly shorter and narrower than peristomium, as deep as of the peristomium. Prostomial lobes irregularly rounded, dorsally flattened; median sulcus shallow; frontal groove marking off palpal region present. Eyes not seen. All antennae incomplete, except left A-I, in a shallow horseshoe, evenly spaced, similar in thickness. Ceratophores ring-shaped in all antennae, without articulations. Ceratostyles digitiform with maximum 15 moniliform articulations in A-III. A-I to second peristomial ring; A-II to setiger 4 and A-III to setiger 3. Peristomium cylindrical with flaring lower lip. Separation between rings distinct dorsally and ventrally; anterior ring of total peristomial length. Peristomial cirri to middle of first peristomial ring, tapering, with 4 long, cylindrical articulations.

Jaws not examined.

Branchiae (Figure 24e) present, pectinate, distinctly longer than notopodial cirri, erect. Branchiae from setiger 6 to end of fragment. First and last branchiae with 3 filaments; maximum number of filaments 8 by setiger 15. Filaments shorter than notopodial cirri. Branchial stems slender, erect, tapering, longer than filaments. Filaments digitiform.

All neuropodial acicular lobes distally asymmetrically truncate or rounded with aciculae emerging above midline. All pre- and postsetal lobes low folds. Anterior and posterior ventral cirri thick, tapering. Median ventral cirri distinctly, nearly spherically basally inflated, with long, distally truncate narrow tips. Notopodial cirri distinctly basally inflated in anterior and early median setigers, becoming tapering and slender towards the posterior end. All notopodial cirri with 4 or 5 long, cylindrical articulations.

Limbate setae longer than other setae, marginally serrated. Pectinate setae present, but not observed in detail. Shafts of compound falcigers (Figure 24b) slightly inflated, marginally serrated, with distinct distal beak. Appendages short, thick with short, nearly truncate heads, bidentate. Proximal teeth triangular, directed laterally; distal teeth larger than proximal teeth, bent, blunt, directed laterally. Guards asymmetrically bluntly pointed, marginally serrated, without mucros. Pseudocompound falcigers and compound spinigers absent. Aciculae (Figure 24d) paired, yellow, tapering, with narrow, straight or gently curved tips; cross-section round. Separation between core and sheath indistinct in both aciculae and subacicular hooks. Subacicular hooks (Figure 24c) yellow, tridentate with teeth in a crest. Hooks first present from setiger 25, present in all setigers thereafter, always single (except for replacements). Teeth decreasing rather evenly in size from proximal to distal. All 3 teeth distinctly curved.

UKNOWN MORPHOLOGICAL FEATURES.—Presence and location of eyes; jaw structure; various features associated with the incomplete nature of the type such as the detailed distribution of branchiae.

EXPECTED STATE OF UNKNOWN MORPHOLOGICAL FEATURES.—Mx III long, located behind left Mx II; not part of distal arc.

CHARACTERS USED IN PREPARATION OF KEY NOT SCORED.—Inappropriate Characters: 56, 58, 59. Unknown Characters: 1,2, 13,14,16,33,36–38,40,47,50,51,64–68.

ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—37,1; 38,1.