Malmgrenia lilianae (Pettibone 1993)

Malmgreniella lilianae

MATERIAL EXAMINED.—SOUTHWESTERN ATLANTIC OCEAN: Brazil: Bay of Flamengo, São Paulo, 23°27′S, 45°06′W, 12 m, Jan 1963, Liliana Forneris, collector, holotype (USNM 55061), 6 paratypes (USNM 55062).

DESCRIPTION.—Holotype, female with eggs, 8 mm long, 4 mm wide including setae, with 30 segments and 14 pairs of elytra. Paratypes (males and females with sperm and eggs) 6–7 mm long, 3–4 mm wide, with 29–30 segments and 13–14 pairs of elytra. Body flattened, tapering slightly anteriorly and posteriorly, with parapodia and setae longer than body width. Body transversely banded dorsally on posterior few segments and ventrally on posterior third to one half of body. Elytra oval, opaque, without tubercles, with some micropapillae along lateral and posterior borders and few on surface, with light grey to black pigmentation forming spots over place of attachment to elytrophore, complete circle on first elytra, and large C-shape area with larger portion on medial area on following elytra (Figure 38B–D).

Bilobed prostomium with anterior lobes rounded, without cephalic peaks, 2 pairs of small eyes, anterior pair anterior to greatest width of prostomium, posterior pair posterodorsal; ceratophore of median antenna in anterior notch with pigment spots on lateral sides, and style about as long as prostomium; ceratophores of lateral antennae barely visible dorsally, inserted ventrally and converging midventrally, with short styles less than half length of median antenna; palps stout, tapered; tentaculophores with single seta on inner side, dorsal and ventral tentacular cirri similar to and slightly longer than median antenna; antennae and tentacular cirri minutely papillate (Figure 38A). Segment 2 with first pair of elytrophores, biramous parapodia, and long ventral buccal cirri similar to tentacular cirri; notosetae similar to those of following parapodia; neurosetae more slender than those following, upper ones tapering to slender, sharp tip, middle and lower ones with long, bare, bulbous tip (Figure 38A,E,F).

Biramous parapodia with body wall delicate, transparent, with internal structures and eggs in coelom clearly visible; notopodium shorter than neuropodium, rounded, with projecting acicular lobe on lower side; neuropodium with subconical presetal acicular lobe, digitiform supraacicular process and postsetal lobe shorter, rounded (Figure 38G,H). Notosetae numerous, about 3 lengths, longest extending to about tips of neuropodia, slightly stouter than neurosetae, with prominent spinose rows, tapering to pointed bare tips (Figure 38G,I). Neurosetae moderate in number (about 17), forming fan-shape bundle, upper ones with longer spinose region and pointed bare tips, middle and lower ones with shorter spinose region and slightly hooked bare tips, all with entire tips (Figure 38G,J–L). Cylindrical cirrophores of dorsal cirri with wide glandular areas on posterior sides, with styles finely papillate, with filamentous tips extending to about tips of neurosetae; dorsal tubercles nodular; ventral cirri short, tapered, with few micropapillae (Figure 38H). Pygidium with anus medial to last pair of small parpodia, with pair of long anal cirri.

ETYMOLOGY.—The species is named for the collector, Liliana Forneris.

DISTRIBUTION.—South Atlantic Ocean, Brazil. Depth 12 meters.