Flabelligera infundibularis Johnson, 1901

Salazar-Vallejo, Sergio I., 2012, Revision of Flabelligera Sars, 1829 (Polychaeta: Flabelligeridae) 3203, Zootaxa 3203 (1), pp. 1-64 : 20-22

publication ID

https://doi.org/ 10.11646/zootaxa.3203.1.1

persistent identifier

https://treatment.plazi.org/id/8C476837-FFF6-FFF4-FF79-FB56FDDAFC14

treatment provided by

Felipe

scientific name

Flabelligera infundibularis Johnson, 1901
status

 

Flabelligera infundibularis Johnson, 1901 View in CoL

Figure 6 View FIGURE 6

Flabelligera infundibularis Johnson 1901:417 View in CoL , Pl. 12, Figs. 124–127; Günther 1912:15; Chamberlin 1919b:398; Moore 1923:223; Hartman 1938:14; Berkeley & Berkeley 1952:7, Figs. 1–4 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 ; Støp-Bowitz 1948a:33; Hartman 1969:291–292, Figs. 1–5 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 .

Flabelligera affinis: Hobson & Banse 1981:58 View in CoL , Fig. 11e View FIGURE 11 (non Sars).

Type material. Northeastern Pacific Ocean. Lectotype (herein designated, MCZ-2503 ), and paralectotypes ( LACM-AHF-535 ), Scow Bay (48°03.75' N, 122°42.50' W), Puget Sound, Washington, U.S.A., Columbia University Zoological Expedition 1896, 6 fathoms, Jun. 1896, N. R. Harrington coll. GoogleMaps

Additional material. Northeastern Pacific Ocean. Two specimens (ANSP-uncatalogued), Puget Sound, Washington, 1896, N.R. Harrington, coll. Two specimens ( CAS-5783 ), complete, without tunic, St. Paul’s Island, Pribilof , Bering Sea , summer 1897, A. Greely & R.E. Snodgrass, coll. Two specimens ( CAS-6101 ), complete, damaged, St. Paul’s Island , Pribilof , Bering Sea , summer 1897, A. Greely & R.E. Snodgrass, coll. One specimen ( CAS-22414 ) complete, damaged, Chukchi Sea , Alaska, Stat. 164 (70°19'48" N, 161°52'48" W), intertidal, 13 Aug. 1976, H. Webber, coll. Two specimens ( CAS-27355 ), very damaged, broken into anterior and posterior fragments, Stefansson Sound , Beaufort Sea , Alaska, in Boulder Patch (70°19.25' N, 147°35.1' W), 6 m, in rocks, 5 Mar. 1980. One specimen ( CAS-27895 ), very damaged anterior fragment, Pitt Point, Alaska, Stat. 1323 (71°22.4' N, 152°21.5' W), 83 m, sandy silt, 30 Aug. 1976, R.E. Ruff, coll. Three specimens ( USNM-186478 ), washed ashore, Point Barrow base, Alaska, 28 Sep. 1949, G. E. MacGinitie, coll GoogleMaps .

Description. Lectotype (MCZ-2503) damaged, most tunic and neurohooks detached; body cylindrical, medially swollen, posteriorly tapered ( Fig. 6A View FIGURE 6 ); 85 mm long, 10 mm wide, cephalic cage 6 mm long, 59 chaetigers. Tunic with a thick, whitish, lower layer in some portions of the body ( Fig. 6B, C View FIGURE 6 ); without sediment; papillae long (in some specimens, with swollen basis), clavate, some mucronate.

Cephalic hood not exposed. Anterior end observed in paralectotype; prostomium low cone, with four eyes. Caruncle well developed, dividing the branchial plate, extended beyond the branchial plate margin ( Fig. 6D View FIGURE 6 ). Palps thick, about as long as branchiae; palp bases round, large.

Branchiae divided into two lateral groups, over 100 filaments per group (less abundant in other specimens, Fig. 6E View FIGURE 6 ). Nephridial lobes paired, lateral to caruncle, about the median distance of branchial groups.

Cephalic cage chaetae about 1/15 body length, as long as notochaetae in following chaetigers. Only chaetiger 1 involved in the cephalic cage, 40–42 notochaetae, 44–46 neurochaetae per side. Anterior dorsal margin of chaetiger 1 smooth (filamentous papillae probably lost). Anterior chaetigers without especially long papillae. Chaetigers 1–3 decreasing in size, chaetiger 1 longest. Chaetal transition from cephalic cage to body chaetae abrupt, neurohooks from chaetiger 2. Gonopodial lobes not seen.

Parapodia well developed, lateral; median neuropodia ventrolateral. Notopodia flat lobes. Neuropodia conical lobes. Noto- and neuropodia close to each other.

Median notochaetae arranged in transverse rows, multiarticulated capillaries, as long as half body width, 8–10 per ramus; articles very short basally, some chaetae multiarticulated in median or distal regions only, articles become slightly longer distally. Neurochaetae multiarticulated hooks from chaetiger 2 ( Fig. 6F, G View FIGURE 6 ), mostly one per ramus, neuropodia 5–8 with two hooks per ramus. Handle articulation medially placed, articles irregular (Fibonacci); three articles: small, medium sized, and long. Other articles anchylosed, small, continued to the bending region. Crest slightly wider than handle, dark brown along the body, with darker distal half; width:length ratio 1:6.

Posterior end in better shape than rest of the body; tunic completely covering notochaetae; tapering, anus terminal, no anal cirri. Mature female (CAS-27355) with oocytes, about 125 µm each.

Remarks. Flabelligera infundibularis Johnson, 1901 belongs in the group of species with opaque tunics, but it differs from the other species by having a tunic without sediment particles and especially because there is an opaque external layer within the tunic. Pettibone (1954:289), probably following Støp-Bowitz, synonymized F. infundibularis with F. affinis but the latter included only reports from northeastern Europe. This northwestern American species was regarded as distinct by Hartman (1969:291; cf. Hartman 1938, Hartman 1963); but a contrary position was taken by Hobson & Banse (1981:58). However, there are slight differences in the color of the hooks, which are darker in F. infundibularis and the bending region is smoother (less fibrous) in F. affinis . Other differences may lie in the anterior end, in relation to the relative size of the eyes and probably on the relative position of the nephridial lobes. A recent publication ( Oug et al. 2011:5) cited this species as F. infundibuliformis , supposedly after the record by Wesenberg-Lund (1953:64, Fig. 4 View FIGURE 4 ). However, the latter author did not alter the specific name, hesitated about the species because of the poorly preserved specimens, most without tunic, and made an illustration of the anterior end in ventral view. Oug et al. erroneously indicated that it was a dorsal view.

Johnson (1901) did not designate types; the type series includes several syntypes now held in two museums ( LACM-AHF and MCZ); however, all LACM-AHF syntypes are very damaged, broken or incomplete. Thus, the syntype in MCZ is herein designated as the lectotype, rendering the remaining specimens the paralectotypes.

Distribution. From the Gulf of Alaska to British Columbia (type locality), in shallow water. Harrington & Griffin (1897) found that what was later described as F. infundibularis was abundant in muddy bottoms in Puget Sound but recent studies failed to confirm this abundance, and the species was not listed among the top abundant invertebrates by Lie & Kisker (1970). The record for California ( Hartman 1969:291) cannot be confirmed because the specimens were in bad shape.

MCZ

Museum of Comparative Zoology

Kingdom

Animalia

Phylum

Annelida

Class

Polychaeta

Order

Terebellida

Family

Flabelligeridae

Genus

Flabelligera

Loc

Flabelligera infundibularis Johnson, 1901

Salazar-Vallejo, Sergio I. 2012
2012
Loc

Flabelligera affinis: Hobson & Banse 1981:58

Hobson, K. D. & K. Banse 1981: 58
1981
Loc

Flabelligera infundibularis

Hartman, O. 1969: 291
Berkeley, E. & C. Berkeley 1952: 7
Stop-Bowitz, C. 1948: 33
Hartman, O. 1938: 14
Moore, J. P. 1923: 223
Chamberlin, R. V. 1919: 398
Gunther, K. 1912: 15
Johnson, H. P. 1901: 417
1901
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