Bradabyssa rugosa ( Hansen, 1880 ) Salazar-Vallejo, 2017

Salazar-Vallejo, Sergio I., 2017, Revision of Brada Stimpson, 1853, and Bradabyssa Hartman, 1967 (Annelida, Flabelligeridae), Zootaxa 4343 (1), pp. 1-98 : 36-38

publication ID

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

publication LSID

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

DOI

https://doi.org/10.5281/zenodo.6051151

persistent identifier

https://treatment.plazi.org/id/038B87B6-3445-FF89-1AB7-F8CAFC0FFE69

treatment provided by

Plazi

scientific name

Bradabyssa rugosa ( Hansen, 1880 )
status

comb. nov.

Bradabyssa rugosa ( Hansen, 1880) View in CoL n. comb.

Figures 1C–F View FIGURE 1 , 17 View FIGURE 17

Trophonia rugosa Hansen, 1880: 231 View in CoL , Pl. 4, Figs 4–7 View FIGURE 4 View FIGURE 5 View FIGURE 6 View FIGURE 7 .— Hansen 1882: 38 –39, Pl. 7, Figs 9–12 View FIGURE 9 View FIGURE 10 View FIGURE 11 View FIGURE 12 .— Oug et al. 2014: 229 (syn.). Trophonia arctica Hansen, 1880: 230 View in CoL , Pl. 5, Figs 1–3 View FIGURE 1 View FIGURE 2 View FIGURE 3 .— Hansen 1882: 39, Pl. 7, Figs 17–20 View FIGURE 17 View FIGURE 18 View FIGURE 19 View FIGURE 20 .

Brada rugosa View in CoL .— Støp-Bowitz 1948a: 37 –40, Fig. 10 View FIGURE 10 (syn.).— Støp-Bowitz 1948b: 41 –42, map.— Jirkov & Filippova 2001: 355, Figs 1–4 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 .— Oug et al. 2011: 13, Figs a, b. (repeated from Støp-Bowitz 1948a).

Type material. Northwestern European Arctic Ocean. Syntypes ( ZMUB 2288 View Materials ), Norwegian North Atlantic Expedition , Sta. 366 (79°35' N, 11°17' E), NW Svalbard, 68 m (after Hansen 1882:23), 1877. GoogleMaps

Description. Two syntypes (ZMUB 2288, Figs 1C View FIGURE 1 , 17A, B View FIGURE 17 ) with all neurochaetae broken. One syntype whitish (more damaged), body truncate in both ends, soft, dissected anteroventrally and several parapodia removed; the other syntype yellowish, truncate, wider anteriorly, tapered posteriorly, rough, several parapodia removed; 34–38 mm long, 7–8 mm wide, cephalic cage 5.0– 5.5 mm long, 21–25 chaetigers. Tunic rugose, dorsal and ventral papillae forming incomplete transverse tuberculose ridges, arranged in 3–4 transverse rowsseries per chaetiger; each tubercle covered by a thin layer of fine sediment particles.

Cephalic hood not exposed; dissected syntype without anterior end (missing). Additional dissection avoided. Anterior end features unknown.

Cephalic cage chaetae as long as 1/6 body length, or more than half as long as body width. Chaetiger 1 involved in cephalic cage; chaetae arranged in short lateral series; 10 notochaetae and 10 neurochaetae per side (most remain in yellowish syntype, Fig. 17C View FIGURE 17 ).

Anterior dorsal margin of first chaetiger papillated, papillae small, abundant (most eroded). Anterior chaetigers without especially long papillae. Chaetigers 1–3 of similar length but notopodia in chaetiger 2 larger than others. Chaetal transition from cephalic cage to body chaetae abrupt; chaetiger 2 with neurospines (broken). Gonopodial lobes small, rounded, darker than surrounding areas, present in chaetiger 5 ( Fig. 17C, D View FIGURE 17 ).

Parapodial lateral, well developed ( Fig. 1D View FIGURE 1 ); median neuropodia ventrolateral. Notopodia and neuropodia close to each other. Notopodia low conical lobes with 3–4 tapered infrachaetal papillae, reduced to 1–2 in posterior parapodia. Neuropodia larger rounded lobes with 4–6 postchaetal papillae.

All notochaetae multiarticulate capillaries; median notochaetae arranged in tufts (or a short transverse series), few remain, about 6 per ramus, 1–2 smaller, thinner, with long articles, 3–4 longer, thicker, with very short articles basally, medium-sized medially and distally ( Fig. 1E View FIGURE 1 ), as long as 1/3 body width. Neurochaetae multiarticulate capillaries in chaetiger 1. Aristate brown neurospines (after original description) from chaetiger 2 (bases remain), arranged in C-shaped patterns (facing posteriorly), 5–7 per bundle, with long, straight aristae ( Fig. 1F View FIGURE 1 ).

Posterior end rounded, truncate ( Fig. 17E View FIGURE 17 ); pygidium with anus terminoventral, vertical slit; anal cirri absent.

Remarks. Bradabyssa rugosa ( Rathke, 1843) n. comb. is unique in having 3–4 transverse low incomplete tuberculose ridges or verrucae per segment. There are other species with 3 transverse series of tubercles per segment (see key above) but this is the only species possessing flat, polygonal ridges.

Støp-Bowitz (1948a:38) noted that the type specimens above were placed together before he could study them, and that probably because they were labelled as Trophonia rugosa , despite the fact they were the original type material for T. rugosa Hansen, 1880 and T. arctica Hansen, 1880 , Støp-Bowitz (1948a:38) regarded them as synonymous, Oug et al. (2014:229) agreed upon this conclusion, and I concur. The shorter, slightly darker specimen corresponds to the former, and the whitish, slightly larger specimen to the latter. Consequently, because there are two type specimens in a single container, they are regarded as syntypes even though historically they were regarded as separate species.

Distribution. Northwestern European Arctic Ocean, in shallow waters.

Kingdom

Animalia

Phylum

Annelida

Class

Polychaeta

Order

Terebellida

Family

Flabelligeridae

Genus

Bradabyssa

Loc

Bradabyssa rugosa ( Hansen, 1880 )

Salazar-Vallejo, Sergio I. 2017
2017
Loc

Brada rugosa

Oug 2011: 13
Jirkov 2001: 355
Stop-Bowitz 1948: 37
Stop-Bowitz 1948: 41
1948
Loc

Trophonia rugosa

Oug 2014: 229
Hansen 1882: 38
Hansen 1882: 39
Hansen 1880: 231
Hansen 1880: 230
1880
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