Maldanidae is a species rich family in Falkland Islands’ waters. Specimens were often heavily fragmented and incomplete as is typical for maldanids. Not all species could have been unambiguously assigned to a genus, therefore some were identified to subfamily only. The available taxonomic literature from the region is problematic with regards to this family and in need of an update.
Overview of Maldanidae genera collected from Falkland Islands in this study. (“?” indicates that specimens were posteriorly incomplete or uncertainty).
|
|
Cephalic plaque present/absent |
Uncini present from |
Form and distribution of uncini |
Arrangement of uncini |
Segments with collar or pads |
Anal plaque present/ absent; form (if present) |
Anus |
|
Rhodine |
absent |
ch. 5 |
rostrate hooks only |
double rows in anterior and midbody chaetigers; subsequently in single rows |
collars in chaetigers 2 and 3;additionally may occur in some posterior chaetigers |
? |
? |
|
Boguea |
absent |
ch. 5 |
rostrate hooks only |
In singles, irregular and distinctly double |
absent |
? |
? |
|
Nichomache |
absent |
ch. 1 |
single spine in chaetigers 1-3; rostrate hooks from chaetiger 4 |
in single rows |
absent |
present, symmetrical, with about 17 short conical cirri |
terminal |
|
Micromaldane (larva?) |
absent |
ch. 2 (ch. 1?) |
rostrate hooks only, max. 3 per ramus |
in single rows |
absent |
? (not fully developed?) |
? |
|
Lumbriclymenella |
absent |
ch. 1 |
1 or 2 spines in chaetigers 1-4; rostrate hooks from chaetiger 5 |
in single rows |
absent |
absent |
terminal? |
|
Notoproctus |
present (extremely low rim) |
ch. 1 |
single spine in chaetigers 1-4; rostrate hooks from chaetiger 5 |
in single rows |
absent |
present, symmetrical, smooth (resembles cephalic plaque) |
dorsal |
|
Clymenura |
present |
ch. 1 |
rostrate hooks only, their number reduced In chaetigers 1 -3 (dentition of rostrate hooks may also be reduced) |
in single rows |
semi-circular pad on ventrum of chaetiger 8 |
present, symmetrical, with long and short, filiform cirri |
? |
|
Praxillella |
present |
ch. 1 |
1 or 2 spines in chaetigers 1-3; rostrate hooks from chaetiger 4 |
in single rows |
absent |
present, symmetrical, bordered by 28 cirri of similar length with midventral cirrus longer |
anus cone shaped, protruding from the anal plaque |
|
Axiothella sp. 1 |
present (rim very low) |
ch. 1 |
rostrate hooks only, their number reduced in chaetigers 1 -3 |
in single rows |
absent |
present, symetrical, bordered by ~10 very short sub-triangular cirri of similar length, with midventral cirrus long and thin |
anus cone shaped, protruging from the anal plaque |
|
Euclymeninae |
present (rim very low) |
ch. 1 |
rostrate hooks only, their number reduced In chaetigers 1 -3 |
in single rows |
absent |
? |
? |
REFERENCES:
Darbyshire, T., 2012. A new species of Micromaldane (Polychaeta: Maldanidae) from the Falkland Islands, southwestern Atlantic, with notes on reproduction. Zootaxa, 3683, pp.439-446.
De Assis, J.E., Alonso, C. and Christoffersen, M.L., 2007. Two new species of Nicomache (Polychaeta: Maldanidae) from the southwest Atlantic. Zootaxa, 1454, pp.27-37.
De Assis, J.E., Lindsey Christoffersen, M. and da Cunha Lana, P., 2010. Phylogenetic analysis of Petaloptoctus (Maldanidae: Polychaeta), with description of a new species from southeastern Brazil. Scientia Marina, 74(1), pp.111-120.
Hartman, O. 1978. Polychaeta from the Weddell Sea quadrant, Antarctica. Antarctic Research Series. 26(4): 125-223., available online at http://onlinelibrary.wiley.com/doi/10.1002/9781118664599.ch4/summary.
Kongsrud, J.A., Budaeva, N., Barnich, R., Oug, E. and Bakken, T., 2013. Benthic polychaetes from the northern Mid-Atlantic Ridge between the Azores and the Reykjanes Ridge. Marine Biology Research, 9(5-6), pp.516-546.
Read, G.B., 2011. A new Clymenura (Polychaeta: Maldanidae) from the intertidal of Banks Peninsula, New Zealand, with a reassessment of Leiochone Grube, 1868 and Clymenura Verrill, 1900. Zootaxa, 2934, pp.39-52.
Wolf, P.S., 1983. A revision of the Bogueidae Hartman and Fauchald, 1971, and its reduction to Bogueinae, a subfamily of Maldanidae (Polychaeta). Proceedings of the Biological Society of Washington, 96(2), pp.238-249.