Kuwaita dolicognatha ( Rioja, 1941 )

Carrera-Parra, Luis F. & Orensanz, José M., 2002, Revision of Kuwaita Mohammad, 1973 (Annelida, Polychaeta, Lumbrineridae), Zoosystema 24 (2), pp. 273-281 : 276-278

Kuwaita dolicognatha ( Rioja, 1941) n. comb.

( Fig. 1 C-E)

Ninoe dolicognatha Rioja, 1941: 722 , 723, pl. 7, figs 9- 15, pl. 8, figs 1-5.

Ninoe dolichognatha [sic] – Fauchald 1970: 115, 116, pl. 19, figs f-k.

Lumbriconereis branchiata Fauvel, 1943: 22-24 , fig. 2a-g.

MATERIAL EXAMINED. — Mexico. La Paz, Baja California Sur, intertidal sandy beach, 25. VI.1979, J. Turrubiantes coll., 2 specimens. — Estero de Urías, Sinaloa, 23°12’N, 106°23’W, 0.3 m, I.1979, A. Rutgers coll., 2 specimens (EMU-477).

DISTRIBUTION. — Pacific coast of Mexico, from the northern end of the Gulf of California to Acapulco, in sandy beaches.

DESCRIPTION

One of the specimens is in excellent condition, complete, c. 255 mm long, 2 mm maximum width without parapodia, consisting of c. 435 setigers. Three antennae hidden under the nuchal fold. Notopodia small, button-like, with notoaciculae. Simple multidentate hooded hooks starting on setiger one ( Fig. 1C ); ventral fascicle of limbate setae present in setigers 1-36(39); dorsal fascicle of limbate setae displaced to a subdorsal position posterior to setiger 43-50, continuing in this position to posterior end of body. Pygidium with four subequal anal cirri. Nephridial papillae beginning on segments 45-55, as minute flat lobe; first on first 7-14 setigers, then irregularly bilobed or unilobed, but number of lobes consistently increasing towards posterior end, reaching a maximum of four in mid-posterior segments; absent from last 10-11 segments ( Fig. 1D ). Around setiger 90 a small branchia visible on anterior, dorsal surface of each segment; simple throughout, disappearing in last 30-35 setigers. Maxillae as typical of the genus; maxillary carriers slightly shorter than maxillae I; maxillae I with well-developed bridles; maxillae II with five to six teeth, shorter than maxillae I (half their length), connected to them by well-developed connecting plates; maxillae III bidentate; maxillae IV unidentate and maxillae V relatively small, sclerotized ( Fig. 1E ).

REMARKS

The type material is now lost; the specimens used for this description were collected close to the type locality. Fauvel (1943) described the species L. branchiata from western Mexico (Gulf of California), Fauchald (1970) considered it as a synonym of N. dolichognatha (sic). The synonymy is herein considered to be valid.

Figures

FIG. 1. — A, B, Kuwaita magna Mohammad, 1973 (BMNH ZB1971.50); A, middle-posterior segments in lateral view; B, maxillary apparatus; C-E, K. dolichognatha (Rioja, 1941) n. comb. (EMU-477); C, simple multidentate hooded hook; D, posterior parapodium in frontal view; E, maxillary apparatus. Scale bars: A, B, D, E, 250 µm; C, 25 µm.