Terebellidae Johnston, 1846
The classification followed here is reflecting current status in WoRMS database (see link: http://marinespecies.org/aphia.php?p=taxdetails&id=982), which can be summarized as follow: only subfamilies Terebellinae, Thelepodinae, and Polycirrinae are recognised with Amphitritinae now disused in favour of Terebellinae, Thelepinae emended to Thelepodinae and Artacaminae is not currently used, as Artacama is included in Terebellinae. We do not follow recent re-organisation as proposed by Nogueira, Fitzhugh & Hutchings (2013).
Terebellidae have confused taxonomic history with the on-going debate (Nogueira, Fitzhugh & Hutchings, 2013). This is another group from the region in urgent need of revision and update of taxonomic literature. The species overview is here organised by subfamily. Briefly the subfamilies as recognised here can be identified as follows (modified from Jirkov and Leontovich, 2013; see also other references below for terminology, characters and alternative classifications):
Terebellinae: upper lip usually small; branchiae present or absent, if present of various shapes, usually branched; thoracic uncini arranged in double rows in posterior thorax.
Thelepodinae: upper lip usually small; branchiae always present, as simple filaments and never branched; thoracic uncini arranged in single row.
Polycirrinae: upper lip elongated; branchiae absent; thoracic uncini present or absent, if present always arranged in a single row.
Overview of Terebellinae genera/species collected from Falkland Islands in this study:
|
Branchiae +/- |
No. of branchial pairs/form |
No. of segments with notochaetae |
Thoracic uncinigers with double rows of uncini |
Lobes of anterior segments |
|
|
Pista (several species present see separate entry for details) |
present |
1-2; plumose or arborescent |
17 |
from TU 7 |
enlarged |
|
Amphitritides sp. 1 |
present |
2; branched |
16 |
from TU 7 (also present in many abdominal uncinigers |
not enlarged |
|
Leaena? sp. 1 |
absent |
n/a |
at least 16 (specimen incomplete) |
from TU 7 |
not enlarged |
|
Leaena? sp. 2 |
absent |
n/a |
11 |
from TU 7 |
not enlarged |
|
Terebellinae sp. 1 |
present |
3; (scars/stumps only) |
16 |
from TU 7 |
slightly enlarged |
|
Artacama sp. (conical proboscis present) |
present |
3; tufts of simple filaments |
at least 16 (specimen incomplete) |
from TU 7 |
not enlarged |
Overview of Thelepodinae species collected from Falkland Islands in this study:
|
Eyes spots |
No. of branchial pairs |
No. of segments with notochaetae |
Presence of notochaetae |
|
|
Streblosoma sp. 1 |
reddish band of eye spots present |
3 pairs; each with few simple filaments |
at least 18 (specimen incomplete) |
from first branchigerous segment |
Overview of Polycirrinae species collected from Falkland Islands in this study:
|
Uncini in thorax +/- |
Uncini in abdomen +/- |
Notochaetae +/-; no. of segments |
|
|
Polycirrus sp. 1 |
absent |
present |
present on 13 segments |
|
Lysilla sp. 1 |
absent |
absent |
present on 6 segments |
|
Hauchiella sp. |
absent |
absent |
absent |
REFERENCES
Glasby, C.J. and Hutchings, P.A., 2013. Revision of the taxonomy of Polycirrus Grube, 1850 (Annelida: Terebellida: Polycirridae). Zootaxa, 3877(1), pp.1-117.
Jirkov, I.A. and Leontovich, M.K., 2013. Identification keys for Terebellomorpha (Polychaeta) of the eastern Atlantic and the North Polar Basin. Invertebrate Zoology, 10(2), pp.217-243. (link: http://www.nature.air.ru/invertebrates/10_2/invert10_2_217_243%20_irkov.pdf)
Leontovich, M. K., and Jirkov, I. A., 2011. New data on chaetal morphology of Terebellinae (Polychaeta: Terebellomorpha), Italian Journal of Zoology, 78:sup1, 242-248, DOI: 10.1080/11250003.2011.580568
Nogueira, J.M.M.; Hutchings, P.A., 2007. New species of terebellid polychaetes (Polychaeta : Terebellidae) from Australia. Zootaxa (1473): 1-24
Nogueira, J.M.M., Hutchings, P.A. and Fukuda, M.V., 2010. Morphology of terebelliform polychaetes (Annelida: Polychaeta: Terebelliformia), with a focus on Terebellidae. Zootaxa, (2460), pp.1-185.
Nogueira, J.M.M., Harris, L., Hutchings, P. and Fukuda, M.V., 2011. Four terebellines (Polychaeta, Terebellidae) with problematic taxonomic histories. Zootaxa, 2995, pp.1-26.
Nogueira, J.M.M.; Fitzhugh, K.; Hutchings, P. A., 2013. The continuing challenge of phylogenetic relationships in Terebelliformia (Annelida : Polychaeta). Invertebrate Systematics 27(2): 186-238, available online at http://www.publish.csiro.au/paper/IS12062