[Taxacom] Branchiobdellida (leeches?, oligochaetes?, or stem annelids?)
g.read at niwa.co.nz
Sun Apr 18 22:41:14 CDT 2010
Here's another one with a similar placement.
Marotta, R.; Ferraguti, M.; Erseus, C.; Gustavsson, L.M. (2008). Combined-data phylogenetics and character evolution of Clitellata (Annelida) using 18S rDNA and morphology. Zoological Journal of the Linnean Society 154(1): 1-26.
"Morphological characters in combination with 18S rDNA suggest the following sister-group relationships: (1) between Acanthobdella and Hirudinida, with Branchiobdellida as their plesiomorphic sister group, and (2) between enchytraeids and Propappus, with both taxa grouping at the base of a large assemblage containing Lumbricidae, Lumbriculidae, Branchiobdellida, Acanthobdella, and Hirudinida."
>>> On 19/04/2010 at 3:21 p.m., <Tony.Rees at csiro.au> wrote:
> Dear Ken,
> I imagine there is most likely some more recent literature on this, but in
> case it helps, here is some text from the relevant chapter by Siddall et al.
> in "Assembling the Tree of Life" (Cracraft & Donohue eds., 2004), discussing
> results form nuclear and mitochondrial gene sequences:
> [p. 244]
> "... the results of this cooperative phylogenetic work was the unambiguous
> validation of Livanow's (1906, 1931) assertions that Branchiobdellidans and
> Acanthobdella share a recent common ancestor with leeches, which together
> form the sister lineage to the lumbriculid ologichaetes (fig. 15.6)."
> I can send you a copy of the cited figure if you are interested.
> Tony Rees
> -----Original Message-----
> From: taxacom-bounces at mailman.nhm.ku.edu
> [mailto:taxacom-bounces at mailman.nhm.ku.edu] On Behalf Of Kenneth Kinman
> Sent: Monday, 19 April 2010 12:43 PM
> To: taxacom at mailman.nhm.ku.edu
> Subject: [Taxacom] Branchiobdellida (leeches?, oligochaetes?, or stem
> Dear All,
> There seems to be some controversy over whether Order
> Branchiobdellida is: (1) a primitive oligochaete taxon, (2) a primitive
> hirudinean (leech) taxon, or (3) something which split off before either
> of these main clitellate annelid taxa. Is there any recent literature
> which might clearly point which of these three possibilities is the most
> Ken Kinman
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