Scalibregmatidae Malmgren, 1867
Scalibregmatidae are well represented in waters from the region of interest here. Summary of these species was provided by Blake (1981), with additional descriptions of new species in recent years (Schüller, M., 2008; Blake, J.A., 2015). Five species were recorded from Falkland Islands in this study and these are summarised in table below.
Overview of Scalibregmatidae species collected from Falkland Islands in this study.
|
Prostomium |
Branchiae +/- and their form (if present) |
Large spines in anterior segments +/- |
Form of posterior parapodia |
Colour/Pigmentation/Staining pattern (Shirla-stain) |
|
|
Scalibregma sp. 1 |
T-shaped with anterolateral horns |
present; 4 pairs of dendritically branched branchiae on chaetigers 2-5 |
absent |
with well-developed dorsal and ventral cirri |
dark yellow with orange caste/black dots forming a row across dorsum of chaetigers 4 and 5; similar isolated pigmented glands ventrally to neuropodia of chaetigers 4 and 5; similar black glands in dorsal and ventral cirri of posterior parapodia. |
|
Scalibregma sp. 2 |
T-shaped with anterolateral horns |
present; 4 pairs of dendritically branched branchiae on chaetigers 2-5 |
absent |
with well-developed dorsal and ventral cirri |
light yellow, without orange cast /no pigmentation, but Shirla stain retained ventrally to neuropodia of chaetiger 4 as a patch of pink to reddish dots; similar staining retained in dorsal and ventral cirri of posterior parapodia |
|
Scalibregmatidae sp. 1 |
elongated horns directly nearly anteriorly |
present; 4 pairs of dendritically branched branchiae on chaetigers 2-5 |
absent |
unknown (incomplete specimen) |
yellow with slight orange cast; no pigmentation; no staining pattern (on 14 chaetiger long fragment) |
|
Pseudoscalibregma sp. 1 |
T-shaped with anterolateral horns |
absent |
absent |
with small conical dorsal and ventral cirri |
pink, no pigmentation, no staining pattern |
| Pseudoscalibregma bransfieldium | T-shapped with anterolaterla horns, with nuchal crest on posterior half of prostomium | absent | absent | with large, inflated dorsal and ventral cirri | yellow, no pigmentation observed |
|
Asclerocheilus sp. 1 |
heart-shaped with two rounded anterolateral lobes |
absent |
present |
not developed |
yellow, no pigment, no staining pattern |
REFERENCES
Blake, J.A., 1981. The Scalibregmatidae (Annelida: Polychaeta) from South America and Antarctica collected chiefly during the cruises of the R/V Anton Bruun, R/V Hero and USNS Eltanin. Proceedings of the Biological Society of Washington, 94(4), pp.1131-1160.
Blake, J.A., 2015. New species of Scalibregmatidae (Annelida, Polychaeta) from the East Antarctic Peninsula including a description of the ecology and post-larval development of species of Scalibregma and Oligobregma. Zootaxa, 4033(1), pp.057-093.
Hartman, O. 1967. Polychaetous annelids collected by the USNS Eltanin and Staten Island cruises, chiefly from Antarctic Seas. Allan Hancock Monographs in Marine Biology, 2: 1-387
Parapar, J.; Gambi, M. C.; Rouse, G. W. 2011. A revision of the deep-sea genus Axiokebuita Pocklington and Fournier, 1987 (Annelida: Scalibregmatidae). Italian Journal of Zoology 78(Supplement 1): 148-162
Schüller, M., 2008. New polychaete species collected during the expeditions ANDEEP I, II, and III to the deep Atlantic sector of the Southern Ocean in the austral summers 2002 and 2005—Ampharetidae, Opheliidae, and Scalibregmatidae. Zootaxa, 1705, pp.51-68.
