Macellicephala laubieri Reyss 1971

Macellicephala laubieri Reyss, 1971

Macellicephala laubieri Reyss, 1971:244, ligs. 1, 2.

MATERIAL EXAMINED.—Mediterranean, 40°59.3′N, 05°03′E. 2665 m, N. O. Jean Charcot, sta. DS 10. 1970, holotype and 3 paratypes (ZIASL 36643).

DESCRIPTION.—Length of holotype 5 mm, width including setae 4 mm, segments 18 (not 19, as indicated in Reyss, 1971). Dorsal tubercles on cirrigerous segments inconspicuous. Bulbous anterior lobes of prostomium without frontal filaments (Figure 10a; Reyss, 1971, figs. 1,2A). Style of median antenna missing. Palps very long. Dorsal and ventral tentacular cirri subequal in length, about half as long as palps. Without distinct facial tubercle but with bulbous upper lip.

Parapodia typical (Figure 10a–c; Reyss, 1971, figs. 1,2A,B). Notopodia short, subconical, with projecting acicular processes (notopodium not limited to notoaciculum and notosetae, as indicated by Reyss, 1971). Notosetae few (up to 5), about as stout as neurosetae basally, with faint transverse spinous rows and blunt tips (Figure 10d; Reyss, 1971, fig. 2C). Neurosetae enlarged and flattened distally, denticulate along parallel sides, with tapered blunt tips (Figure 10e; Reyss, 1971, fig. 2D–G). Styles of dorsal cirri missing.

Parapodia of segment 18, lateral to pygidium, reduced (poor condition). Nephridial papillae on segments 10, 11 and 12 wide. Body smooth, not papillate.

DISTRIBUTION.—Mediterranean, in 2447 to 2699 meters.

Bathykermadeca, new genus

TYPE-SPECIES:—Macellicephala hadalis Kirkegaard, 1956. Gender: feminine.

DIAGNOSIS.—Body short, broad, flattened, fusiform; segments 21 (first achaetous). Elytra and prominent elytrophores 9 pairs, on segments 2, 4,5, 7, 9, 11, 13, 15 and 17, with dorsal cirri on segments 18, 20,21 (both elytra and dorsal cirri lacking on segment 19). Prostomium deeply bilobed, with frontal filaments; ceratophore of median antenna inserted in anterior notch; paired palps long,, tapered; without eyes. First or tentacular segment fused to prostomium; 2 pairs of tentacular cirri lateral to prostomium, with distinct cirrophores, with projecting acicular lobe, without setae. Segment 2 with buccal cirri attached to basal parts of parapodia lateral to ventral mouth, longer than following ventral cirri (?—missing). Parapodia biramous, with notopodia subequal to neuropodia, both rami with elongate acicular processes. Notosetae stout, with 2 rows of spines and blunt tips. Neurosetae stout, tapering to blunt tips, with 2 rows of spines along one side. Dorsal cirri with cylindrical cirrophores and long styles; ventral cirri short, attached near middle of neuropodia. Dorsal tubercles on cirrigerous segments inconspicuous. Six pairs of nephridial papillae large (on segments 12–17). Pygidium elongate, cylindrical, with anus on segments 18/19, encircled by parapodia of segments 18–21, with pair of anal cirri (missing). Pharynx with 8 pairs of papillae—7 dorsal and ventral, 1 lateral, and 2 pairs of jaws.

A single species is referred to Bathykermadeca: B. hadalis (Kirkegaard), as Macellicephala hadalis Kirkegaard, 1956. South Pacific, in Kermadec Trench, in 6660 to 6720 meters.