Brada inhabilis ( Rathke, 1843 )

Salazar-Vallejo, Sergio I., 2017, Revision of Brada Stimpson, 1853, and Bradabyssa Hartman, 1967 (Annelida, Flabelligeridae), Zootaxa 4343 (1), pp. 1-98 : 16-18

publication ID

https://doi.org/ 10.11646/zootaxa.4343.1.1

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lsid:zoobank.org:pub:6E46EE12-D51F-48B0-BC66-0EBBAF9FA981

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https://treatment.plazi.org/id/038B87B6-3469-FFBD-1AB7-FA56FAF9FF6D

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scientific name

Brada inhabilis ( Rathke, 1843 )
status

 

Brada inhabilis ( Rathke, 1843) View in CoL

Figure 6 View FIGURE 6

Siphonostoma inhabile Rathke, 1843: 218 View in CoL –219, Pl. 11, Fig. 13 View FIGURE 13 .

Brada inhabilis View in CoL .— Malmgren 1867: 84.— Haase 1915: 206 –209, Textfig. 9 (partim).— Støp-Bowitz, 1948a: 40 –44, Fig. 11 View FIGURE 11 (syn.); 1948b: 42–44, map.— Pettibone 1956: 565.— Hartmann-Schröder 1971: 377 –378, Fig. 134; 1996:414, Fig. 200.— Jirkov & Filippova 2001: 353, Figs 1–5 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 .— Oug et al. 2011: 14, Figs a–c (repeated from Støp-Bowitz, 1948a).

Brada sublaevis Stimpson, 1853: 32 View in CoL .— Webster & Benedict 1887: 732 (syn.).

Brada granulata Malmgren, 1867: 194 View in CoL , Pl. 13, Fig. 71, 71A–C.— Théel 1879: 52 –53.— Fauvel 1907: 23.— Moore 1909a: 143.— Haase 1915: 209 –211, Textfig. 10.— Borodin 1929: 28 –36, Pl. 1 (integument and papillae).— Wesenberg-Lund 1950a: 36, 1950b: 85–86.

Material examined. Canadian Arctic Ocean. Eight specimens ( USNM 1422402 View Materials ), damaged, Grainger Collection , Creswell Bay, Sta. 62-2014 (72°43.3' N, 94°05' W), 35 m GoogleMaps , 25 Aug. 1962 (45–58 mm long, 8–10 mm wide, 20–23 chaetigers). Northeastern Atlantic Ocean. One specimen ( ZMUB 11019 View Materials ), off Kvaenangen (60°53'39" N, 21°58'49" E), Norway, Bio. Det., 90 m GoogleMaps , Nordgaard, coll. (pale yellowish, 20.5 mm long, 4 mm wide, cephalic cage 0.3 mm long (one neurochaetae), 22 chaetigers). One specimen ( ZMUB 25245 View Materials ), R.V. Michael Sars, 1900 Expedition, Sta. 10 (64°53' N, 10°00' E), 630 m GoogleMaps , 28 Jan. 1900 (dark grayish, turgid, 32.5 mm long, 10 mm wide, no cephalic cage chaetae left, 22 chaetigers). Two large specimens ( ZMUB 34537 View Materials ), off Syd av Vadsø (70°04'24" N, 291°44'59" E), Norway, R.V. Johan Hjort, Sta. 333 , 18 Jun. 1927 (larger used for description; the other 31 mm long, 5.5 mm wide, no cephalic cage chaetae left, 22 chaetigers). Barents Sea, White Sea. Eight specimens (ECOSUR P2899), 20 m, 6 Aug. 1998, A. Filippova, coll. (14–36 mm long, 3.5–5.0 mm wide, cephalic cage chaetae broken, 20–22 chaetigers; black, low, rounded gonopodial papillae in chaetiger 5).

Description. Larger, non-type specimen complete (ZMUB 34537), yellowish, slightly damaged, most chaetae broken; body fusiform, truncate in both ends ( Fig. 6A View FIGURE 6 ); 34 mm long, 7 mm wide, no cephalic cage chaetae remaining, 22 chaetigers. Papillae very small, globose, arranged in alternating transverse rows, dorsally with 12–13 series per segment, ventrally 7–8; all papillae covered by thin layer of fine sediment particles ( Fig. 6B View FIGURE 6 ).

Anterior end not exposed (smaller, non-type specimen ZMUB 34537 dissected). Prostomium low dark cone, with four large eyes, color faded away. Caruncle well developed, not reaching the branchial plate posterior margin, though there is a thin pigmented ridge running posteriorly. Palps very thick, sides with darker pigment, deep ciliated furrow; basally with abundant whitish ciliates. Palp keels rounded, low. Lateral lips well developed, thick, darker. Ventral lip reduced. Dorsal lip triangular, directed ventrally.

Branchiae all thick cirriform, sessile on branchial plate, arranged along a single, posterior row ( Fig. 6C View FIGURE 6 ). Branchiae as long as palps. Nephridial lobes in branchial plate not seen.

Cephalic cage absent; chaetiger 1 without chaetae. Anterior dorsal margin of first chaetiger papillated, triangular, directed ventrally. Anterior chaetigers without especially long papillae. Chaetigers 1–3 decreasing in size posteriorly. Chaetal transition from cephalic cage to body chaetae abrupt; falcate neurospines present from chaetiger 2. Gonopodial lobes present in chaetiger 5 ( Fig. 6B View FIGURE 6 ).

Parapodia well developed, lateral; median neuropodia ventrolateral. Notopodia and neuropodia close to each other. Notopodia small truncate lobes with 2–3 small, infrachaetal papillae. Neuropodia large truncate rounded lobes surrounded by 1–2 series of papillae ( Fig. 6D View FIGURE 6 ).

Median notochaetae arranged in short tufts; all notochaetae multiarticulate capillaries, articles medium-sized alternating with longer articles basal- and medially, longer distally ( Fig. 6E View FIGURE 6 ), 2–4 per ramus, as long as 1/10 body width. Falcate neurospines present from chaetiger 2, arranged in short transverse series, 4–6 per ramus. Each neurospine with very small anchylose articles basally and medially, distally paler; tips blunt, barely curved ( Fig. 6F View FIGURE 6 ).

Posterior end blunt, rounded; pygidium with anus ventroterminal, vertical slit, with large lateral lobes, without anal cirri.

Variation. Adult specimens 14–58 mm long, 3.5–10.0 mm wide, 20–23 chaetigers.

Remarks. Brada inhabilis was originally described by Rathke from Molde (62°45'23" N, 07°14'19" E), Norway, but the type material, originally deposited in Konigsberg (now Kaliningrad, Russia) was destroyed during World War II. The above described Norwegian material was collected in northern Norway, in what is called the Finmark subprovince, which differs from the southern Norwegian coast, or western Norwegian subprovince ( Oug et al. 2010:17). No neotype has been designated thus far.

On the other hand, the record of B. inhabilis by Langerhans (1881:102–103, Fig. 14a–d View FIGURE 14 ) corresponds to a Diplocirrus . Pettibone (1954:292–293) included in her synonymies of B. inhabilis , B. sublaevis Stimpson, 1853 , B. granulata Malmgren, 1867 , and B. granosa Stimpson, 1853 . However, Brada granosa was later accepted by her ( Pettibone 1956:565), and is also redescribed herein. The other species regarded as a junior synonym is B. granulata , described from Spitsbergen and Greenland; this synonymy was accepted by Wesenberg-Lund (1950a:36), and by Ushakov (1955:310; 1965:287), whereas B. sublaevis , described from Eastern Canada, has not been recorded since the original description, and because there is no type material available, and should be regarded as indeterminable. Moore (1909a:143) recorded B. granulata from Eastern Canada and stated that it might be the same as B. sublaevis Stimpson , a synonymy that had already been suggested by Webster & Benedict (1887:732); however, they also indicated that because of the short description by Stimpson, “… it would be better to retain Malmgren’s name…” Furthermore, B. granulata is a junior synonym of B. inhabilis according to Støp- Bowitz (1948:40–44). The northwestern Pacific records of B. granulata by Ushakov (1955:310(1965:287), Figs. 115A–C), and Levenstein (1966:45) most likely belong to other species.

Brada inhabilis ( Rathke, 1843) View in CoL and B. kudenovi View in CoL n. sp. are very similar as both species have abundant, small papillae throughout the body surface, notochaetae with alternating short and long articles, and neurospines with thin anchylose articles. They differ in several features, however: B. inhabilis View in CoL body is tan, with 20–23 chaetigers, neuropodial lobes projecting, and 3–4 notochaetae per bundle, whereas B. kudenovi View in CoL has a whitish body with 25–26 chaetigers, neuropodial lobes flat, barely projecting, and 1–2 notochaetae per bundle.

Distribution. Arctic and subarctic environments in shallow to deep mostly North Atlantic waters.

Kingdom

Animalia

Phylum

Annelida

Class

Polychaeta

Order

Terebellida

Family

Flabelligeridae

Genus

Brada

Loc

Brada inhabilis ( Rathke, 1843 )

Salazar-Vallejo, Sergio I. 2017
2017
Loc

Brada inhabilis

Oug 2011: 14
Jirkov 2001: 353
Hartmann-Schroder 1971: 377
Pettibone 1956: 565
Stop-Bowitz 1948: 40
Haase 1915: 206
Malmgren 1867: 84
1867
Loc

Brada granulata

Wesenberg-Lund 1950: 36
Borodin 1929: 28
Haase 1915: 209
Moore 1909: 143
Fauvel 1907: 23
Theel 1879: 52
Malmgren 1867: 194
1867
Loc

Brada sublaevis

Webster 1887: 732
Stimpson 1853: 32
1853
Loc

Siphonostoma inhabile

Rathke 1843: 218
1843
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