Bathyglycinde sibogana, Boggemann, 2005

Meissner, Karin, Schwentner, Martin, Göưing, Miriam & Fiege, Thomas Knebelsberger and Dieter, 2023, Polychaetes distributed across oceans-examples of widely recorded species from abyssal depths of the Atlantic and Pacific Oceans, Zoological Journal of the Linnean Society 199, pp. 906-944 : 924

Bathyglycinde sibogana (Augener & Peflibone in Peflibone, 1970)

( Fig. 10A, B )

Glycinde sibogana Augener and Peưibone in Peưibone, 1970: 244, figs 40, 41.

Bathyglycinde sibogana Böggemann, 2005: 196–198 , figs 115, 116. – Böggemann 2009: 311, figs 43, 44, 47. – Fiege et al. 2010: appendix, tables 3 and 5 (name only). – Moreira and Parapar 2015: 61–62, fig. 25A–M. – Böggemann and Dietz 2016: 1508– 1509, fig. 1.

Material examined: Central Atlantic Ocean, Mid-Atlantic Ridge, East, SO 237 (VEMA-Transit), station 4-8, 5735 m (SMF 30491, SEM 1340, SMF 30492, ZMH-P 29694). – for details and additional specimens see the Supporting Information, Table S2 .

Measurements for largest specimen studied (ZMH-P 29694): length 14.5 mm, width 0.5 mm (excl. parapodia), 67 chaetigers, 35 uniramous parapodia.

Description: Prostomium in all three specimens with four irregular indistinct annulations and longitudinal lateral grooves along each side. Posterior chaetigers with two neuropodial prechaetal lobes from chaetiger 36 in specimen ZMH-P 29694 but absent in specimen SMF 30491 with only 37 chaetigers. Proboscidial papillae in area I small conical papillae ( Fig. 10A, B ; long arrows) and area II with five rows of long, slender partly sclerotized papillae similar in shape to those of B. profunda ( Fig. 10A, B ; short arrows). Some with protruding bulge in lower part ( Fig. 10A, B ; asterisk).

Remarks: Bathyglycinde sibogana was originally described from bathyal depths of 1886 m in the Gulf of Boni ( Indonesia) (Augener and Peưibone in Peưibone 1970) and has been reported to occur in the Central and SE Pacific (Böggemann 2005) and the Central and SE Atlantic (Böggemann 2009; this study) as well as the Atlantic Sector of the Southern Ocean (Böggemann and Dietz 2016). The three specimens studied agree well with the description published by Böggemann 2005. Molecular data confirm and extend the distribution of Bathyglycinde sibogana to the Atlantic (Cape Basin (s. Böggemann 2009) and the central Atlantic) ( Fig. 2 ).

Distribution: Indo-Pacific, Gulf of Boni (1886 m, Augener and Peưibone in Peưibone 1970), Central Pacific [4978 m, Böggemann 2005], SE Pacific [3739–3824 m, Böggemann 2005], Central Atlantic (Vema Fracture Zone: 5735 m, this study), South Atlantic [Cape and Angola Basin: 5058–5648 m, Böggemann (2009)], and Scotia Sea [3789–4720 m, Böggemann and Dietz (2016)].

Figures

Figure 2. Geographic distribution and median-joining COI haplotype networks for Bathyglycinde profunda (Hartman and Fauchald, 1971) and B. sibogana (Augener and Peưibone in Peưibone, 1970). The colour-code in the network corresponds to the geographic localities, each vertical line represents one mutational step and the size of each haplotype its frequency.Haplotypes are numered 1–28, details are listed in the Supporting Information, Table S2. Available data came from both the Atlantic and Pacific Oceans; type locality of B. profunda in the Sargasso Sea, NE Atlantic Ocean, and of B. sibogana off Sulawesi, Gulf of Boni, is indicated by asterisks in the map.

Figure 10. LM and cLSM studies of Bathyglycinde sibogana (Augener and Peưibone in Peưibone, 1970) (A, B), SEM studies of Progoniada regularis Hartman, 1965 (C–F), and Bathyglycinde profunda (Hartman & Fauchald, 1971) (G): A, LM study of proboscidial papillae of area I and area II, median part of proboscis. B, cLSM study of similar part of proboscis.C, prostomium with extended proboscis. D, chaetigers 20–25, right side, posterior view. E, chevrons. F, proboscidial papilla. G, proboscidial papillae of areas I and II (as labelled) on posterior part of proboscis.—A, B, SMF 30491, central Atlantic.C–F, ZMH-P 26697 (SEM stub 1341), central Atlantic. G, SMF 30589 (SEM stub 1319), central Atlantic. Abbreviations: rtm = retractor muscle of proboscis, long arrows pointing to papillae of area I, arrowheads pointing to papilla of area II, asterisk marking protruding bulge on papilla of area II. Scales A, B, 50 µm; C, D, G, 100 µm; E, F, 10 µm.