I have attached two more files.And also a placement of Canirallus beankaensis and C. kioloides in the Laurent's attached file. It seems Canirallus is not a member of the Rallidae family.
Canirallus seems indeed to fall outside the core group of rallids. It is most likely close to Sarothrura indeed, albeit support here remains decidedly poor. See also, in particular, the spreading of Porzana spp.
I wouldn't be too sure about the monophyly of Coturnicops, the node that contradicts it has a too low BS. But in the bFib7 tree, Coturnicops noveboracensis appears to be nested in Laterallus... And there support is high.:t: Thank you, Laurent. Really interesting. There are a lot of surprises in the Rallidae family (e.g. Porzana albicollis is out of Porzana, Zapornia and Hapalocrex too (by H&M4) or nonmonophyly of Coturnicops)...
John Boyd (TiF):
www.jboyd.net/Taxo/changes.html (15 May 2014)..."The Galapagos and Black Rails moved from Laterallus to Atlantisia"
I think the correct name for this group might be Creciscus, Cabanis, 1856 (type = C. jamaicensis)
The name Creciscus (Cabanis 1857, type jamaicensis) has priority over Atlantisia.
The position of the New Guinea Flightless Rail, Megacrex inepta, remains unclear. Kirchman (2012) found it basal to both Rallus and Gallirallus, while Trewick's (1997) results would put it in Gallirallus, which I follow here.
If you want to read on this subject:Does that change include the extinct Ascension island Rail, Atlantisia elpenor?
John Boyd (TiF):Thus, if facing a choice, I think that I would tend to accept Kirchman's sequences, while presuming that Trewick's Megacrex might have been a misidentified Gallirallus lafresnayanus.
Raty, in another BirdForum post, found that Trewick and Kirchman used quite different DNA for Megacrex. One of the birds is probably mislabelled. Given the DNA of Trewick's bird is almost identical to other DNA of Gallirallus lafresnayanus, it is probably Trewick who is wrong. Accordingly, Megacrex inepta is placed sister to the Poliolimnas-Amaurornis clade.
If you want to read on this subject:
Atlantisia alpenor was described by Olson (1973 [pdf]), who placed it in Atlantisia together with the smaller Inacessible Island Rail A. rogersi, and the bigger St. Helena Rail (the latter previously classified as Aphanocrex podarces). (This was reviewed by Cracraft, 1974 [pdf]).
Mundia was proposed for elpenor by Bourne et al. (2003 [pdf]), who also returned the St. Helena Rail to Aphanocrex.
In 2002, Slikas, Olson & Fleischer reported having obtained sequences from, ia., Atlantisia rogersi ([pdf]--see #450, p.187), stating that this species "and the Dot-winged Crake, Porzana spiloptera, both fall within a clade including several species in the genus Laterallus". (But, 12 years later, there are still no sequences of Atlantisia in GenBank.)