Chaetopteridae Audouin & Milne Edwards, 1833
Two species of Chaetopteridae were collected from Falkland Islands, one belongs to genus Phyllochaetopterus Grube, 1863 and the other to Spiochaetopterus M Sars, 1856. Both species are likely new to science, suggesting that diversity of this group is greater than two known species reported from the wider region so far Chaetopterus variopedatus (Renier, 1804); Spiochaetopterus patagonicus Kinberg, 1866, S. costarum Hartman-Schroder, 1991 and Phyllochaetopterus monroi Hartman, 1967). Further, the Chaetopterus variopedatus was originally described from the Mediterranean Sea and it is possible that Southern Ocean specimens belong to other as yet undescribed species. The morphological description of chaetopterids is structured in 3 different body regions following Bhaud (1998): anterior (region A), mid-body (region B) and posterior (region C) (e.g. A4 = chaetiger 4 in region A, B1= chaetiger 1 in region B).
Overview of Chaetopteridae collected from Falkland Islands.
|
Dorsal lobes on ch. 1 +/- |
Tube |
Pigmentation |
Region A |
Region B |
No. of modified chaetae on A4 |
|
|
Phyllochaetopterus sp. 1 |
present |
not observed |
ventrally, distinct white band on A4 |
with 9 chaetigers |
with 2 chaetigers |
about 6 |
|
Spiochaetopterus sp. 1 |
absent |
translucent, smooth (no articulation) |
ventrally, red/brown band on A6 and very distinct white band on A7 |
with 9 chaetigers |
with 2 chaetigers |
1 |
REFERENCES:
Bhaud, M.R., 1998. Species of Spiochaetopterus (polychaeta, Chaetopteridae) in the Atlantic-Mediterranean biogeographic area. Sarsia, 83(3), pp.243-263.
Bhaud, M.; Martin, Daniel; and Gil, Joào 2003. Spiochaetopterus creoceanae, a new species of Chaetopteridae (Polychaeta) from the Persian Gulf belonging to the costarum complex. Scientia Marina, 67(1): 99-105.
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.
Nishi, E.; Rouse, G.W. 2007. A new species of Phyllochaetopterus (Chaetopteridae : Annelida) from near hydrothermal vents in the Lau Basin, western Pacific Ocean. Zootaxa (1621): 55-64, available online at http://www.mapress.com/zootaxa/list/2007/2007-10.html#Zootaxa%201621