Websterinereis glauca (Claparède 1870)

Websterinereis glauca (Claparède) new combination

Nereis (Leptonereis) glauca Claparède, 1870:454, pl. 7: fig. 3.

Leonnates pusillus Langerhans, 1880:279, pl. 14: fig. 10.

Nereis (Leptonereis) vaillanti Saint-Joseph, 1888:246, pl. 10: figs. 113–123, pl. 11: fig. 124.

Nereis (Leonnates) pusillus.—Augener 1910:236.

Leptonereis glauca.—Ramsay 1914a:244, pl. 1: figs. 1–10.—Fauvel 1914:163, pl. 12: figs. 5–23; 1923a:333, fig. 129, a–d.—Fage and Legendre 1927:90, figs. 9, 10.

Laeonereis glauca.—Hartman 1945:22; 1949:55; 1959a: 243, 262.

MATERIAL EXAMINED.—Plymouth, England, 6 December 1913, C. Crossland, collector—2 specimens (BMNH 1938:7:1:1–6).

Dinard, France, collection of M. le Baron de Saint-Joseph, no. 20, 1911 (as Leptonereis vaillanti)—atokous female with large eggs (MNHNP). Cherbourg, France, 25 May 1922, collection of P. Fauvel—2 male heteronereids (BMNH 1928:4:26: 827–9).

Cape Pescade, near Algers, 5 December 1924—13 females (MNHNP; USNM 43399). Cape Matifou, Algeria, 22 April 1924, at night-light—numerous male heteronereids (MNHNP; USNM 43398).

DESCRIPTION.—Length up to 35 mm, width up to 3 mm, including setae, segments up to 65. Prostomium with short subulate frontal antennae and stout biarticulate palps; eyes moderately large (Figure 14a). Tentacular segment about twice length of following segment; tentacular cirri short, longest extending to about setiger 4 (3–7). Parapodia of first two setigers with dorsal cirrus, notopodial ligule, neuropodial postsetal lobe, ligule and ventral cirrus (Figure 14b,c); upper bundle neurosetae composed of homogomph spinigers and heterogomph falcigers; lower bundle with heterogomph spinigers and falcigers.

Parapodia of anterior region (Figure 14d-f) with dorsal cirri emerging from basal parts of upper notopodial ligules and extending slightly beyond them; upper and lower notopodial ligules subequal, subconical, with low presetal notopodial lobe between them; neuropodia with anterior subconical acicular lobe and slightly longer postsetal lobe; lower neuropodial ligule smaller than notopodial ligules; ventral cirri short subulate. Notosetae all homogomph spinigers with long blades; upper bundle of neurosetae homogomph spinigers with long blades (Figure 14i) and heterogomph falcigers (Figure 14j); lower bundle of neurosetae with or without heterogomph spinigers with short blades; with heterogomph falcigers.

Parapodia of posterior region (Figure 14g,h) somewhat modified; upper notopodial ligules larger than lower ones; lower neuropodial ligules smaller than neuropodial postsetal lobes. Upper bundle of neurosetae homogomph spinigers and few stouter heterogomph falcigers (Figure 14k); lower bundle of neurosetae heterogomph spinigers with relatively short blades (Figure 14l) and heterogomph falcigers.

Pygidium with anal cirri (Figure 15c). Jaws of pharynx (Figure 16a,b) with numerous teeth (10–15). Maxillary or distal ring bare, without paragnaths or papillae; basal or oral ring with pair of large papillae on dorsal surface (area VI) and row of about seven (5–9) minute papillae on ventrolateral surface (areas VII-VIII).

DESCRIPTION OF FEMALE HETERONEREID.—Body divided into three regions: anterior region of 15–18 setigers with parapodia unmodified, middle region of about 16 modified setigers, and posterior unmodified region of about 12 setigers. Parapodia of anterior region (Figure 15a), posterior region, and pygidium (Figure 15c) similar to those of atokous individuals. Parapodia of middle region (Figure 15b) enlarged, with long swimming setae in addition to usual shorter notosetae and neurosetae (not replacing them).

DESCRIPTION OF MALE HETERONEREID.—Body divided into three regions: anterior region of 14–15 setigers, middle region of about 30 setigers (16–45), and posterior region of 10–12 setigers forming sort of tail. Prostomium with eyes enlarged (Figure 16a). Dorsal cirri of anterior seven setigers enlarged, clavate, increasing in size posteriorly (Figure 16c,d); ventral cirri of anterior seven setigers thicker than those of following setigers.

Parapodia of middle region enlarged and considerably modified (Figure 16f,g). Dorsal cirri cirriform (not lobulated); dorsal lamellae on medial bases of dorsal cirri; large foliaceous postsetal lamellae developed from postsetal neuropodial lobes, extending beyond ligules; winglike ventral lamellae on bases of long cirriform ventral cirri. Usual type of notosetae and neurosetae completely replaced by numerous long swimming setae.

Parapodia of posterior tail region uniramous (Figure 16i); notopodia absent except for large subulate dorsal cirri; neuropodia with lower ligules and ventral cirri. Upper bundle of neurosetae composed of few homogomph spinigers and one to two stout dark simple acicular setae with hooked tips (Figure 16j); lower bundle of neurosetae consisting of one to two simple acicular setae. Pygidium with paired stout dorsal lobes and anal cirri (without papillated area around anus; Figure 16h).

DISTRIBUTION.—Northeast Atlantic from Great Britain to Madeira, Mediterranean.

Kinberginereis new genus

TYPE-SPECIES.—Nereis (Leptonereis) inermis Hoagland, 1920. Gender: feminine.

DIAGNOSIS.—Prostomium subpyriform, with paired frontal antennae, biarticulate palps, and two pairs of eyes. Tentacular segment achaetous and apodous; four pairs of tentacular cirri with distinct cirrophores. Parapodia of first two setigers subbiramous; notopodium with dorsal cirrus, notopodial ligule and slender notoaciculum. Dorsal cirri at bases of upper notopodial ligules. Notopodia with two ligules. Neuropodia with bilobed presetal lobe, short rounded postsetal lobe, and subsetal ligule. Ventral cirri short, tapered. Notosetae homogomph spinigers only. Neurosetae all compound spinigers—homogomph and slightly heterogomph or hemigomph. Pharynx with paired jaws and soft papillae on oral ring only.

ETYMOLOGY.—The genus is named for Johan Gustaf Hyalmar Kinberg, pioneer worker on the Polychaeta.

Known from seamounts and knolls