Phyllodocidae Örsted, 1843
Phyllodocidae collected from Falkland Islands represent species-rich group with at least 10 species (including one species complex) recorded. However, their abundances are low, with each species often represent by one or few specimens, often in imperfect condition (those from deeper-waters often small and fragile). The identification and corresponding descriptions reflect the paucity of well-preserved material and therefore contain some uncertainties. More material, including live specimens (for taxonomic importance if pigmentation in live specimens see Nygren and Pleijel, 2011) as well as molecular evidence will be necessary to fully diagnose these species. Proboscis was dissected (due to rarity and fragility of specimen) and was only observed when everted. Key given by Pleijel (1993) was used to identify Phyllodocidae to genus level.
Overview of Phyllodocidae genera recorded from Falkland Islands in this study.
|
Median antenna +/-; insertion |
Fusion of segments 1 and 2 +/- |
Reduction of segment 1 +/- |
No./arrangement of tentacular cirri |
Form of dorsal cirri |
Other character/s |
|
|
Eulalia? (possibly Pterocirrus) |
present; anteriorly |
absent |
absent |
4/ 1+2+1 |
elongated, paddle-shaped |
chaetigerous lobes symmetrical |
|
Eteone |
absent |
absent |
absent |
2/ 2+0 |
round to oval |
nuchal papilla present |
|
Mystides |
absent |
absent |
absent |
3/ 1+2 |
round, inflated |
tentacular cirri bottle-shaped |
|
Paranaitis |
absent |
present |
n/a |
4/1+2+1 |
foliose, oval |
chatigerous lobes slightly assymetrical |
|
Phyllodoce |
absent |
absent |
present |
4/ 1+2+1 |
foliose, shape variable: lanceolate to oval and rectangular |
nuchal papilla present |
|
Protomystides |
absent |
absent |
absent |
4/1+2+1 |
round, inflated |
eyes absent |
|
Pterocirrus? (possibly Sige) |
possibly present; anteriorly? |
absent |
slightly reduced |
4/1+2+1 |
? |
chatigerous lobes assymetrical |
REFERENCES
Augener, H. (1922). Litorale Polychaeten von Juan Fernandez. pp. 161-218. IN: Skottsberg, C. (Ed.). The Natural History of Juan Fernandez and Easter Island. Volume 3. Zoology. Part II. Almqvist & Wiksells, Uppsala., available online at http://www.biodiversitylibrary.org/item/91170#page/187/mode/1up
Bergström, E., 1914. Zur systematik der polychaetenfamilie der Phyllodociden. Almqvist & Wiksells boktryckeri-a.-b.
Blake, J.A., Hilbig, B. and Scott, P.H., 1997. Family Phyllodocidae Oersted, 1843. Taxonomic atlas of the benthic fauna of the Santa Maria Basin and the western Santa Barbara Channel, (4), pp.109-177.
Kato, T. and Pleijel, F., 2003. A revision of Paranaitis Southern, 1914 (Polychaeta: Phyllodocidae). Zoological Journal of the Linnean Society, 138(4), pp.379-429.
Nygren, A. and Pleijel, F., 2011. From one to ten in a single stroke–resolving the European Eumidasanguinea (Phyllodocidae, Annelida) species complex. Molecular phylogenetics and evolution, 58(1), pp.132-141.
Pleijel, F., 1993. Marine Invertebrates of Scandinavia, vol. 8. Polychaeta Phyllodocidae.
Wilson, R.S., 1988. A review of Eteone Savigny, 1820, Mysta Malmgren, 1865 and Hypereteone Bergström, 1914 (Polychaeta: Phyllodocidae). Memoirs of the Museum of Victoria, 49(2), pp.385-431.