phylogenetic relationships and classification of didelphid marsupials ...
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phylogenetic relationships and classification of didelphid marsupials ...

phylogenetic relationships and classification of didelphid marsupials ... phylogenetic relationships and classification of didelphid marsupials ...

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72 BULLETIN AMERICAN MUSEUM OF NATURAL HISTORY NO. 322 Fig. 30. The tree resulting from maximum-likelihood analysis of first and second codon positions of RAG1 under its best-fitting model (GTR + I + C, ln-likelihood 5 26343.58; table 11). The single synapomorphic deletion event in this gene is indicated with a vertical gray bar. Conventions for indicating nodal support are described in the caption to figure 28. Asterisks indicate nodes resolved by ML analysis of the original data that lack bootstrap support.

2009 VOSS AND JANSA: DIDELPHID MARSUPIALS 73 Fig. 31. The tree resulting from maximum-likelihood analysis of the BRCA1 dataset under its bestfitting model (GTR + C, ln-likelihood 5 215078.42; table 11). Vertical bars indicate unique and unreversed synapomorphic insertions (black) or deletions (gray) in this gene. Conventions for indicating nodal support are described in the caption to figure 28. The broken arrow indicates the alternative position of Glironia recovered by parsimony analysis. the third is Hyladelphys + Didelphinae. A novel result (uniquely recovered with strong support by BRCA1 but not strongly contradicted by any other gene) is the sister-group relationship between Marmosa and Tlacuatzin. In effect, the only relevant intergeneric nodes not convincingly resolved by BRCA1 are the one that clusters Cryptonanus with Gracilinanus (recovered with only weak to moderate support by MP, ML, and Bayesian analyses) and the position of the ingroup root. The latter was placed between Glironia

72 BULLETIN AMERICAN MUSEUM OF NATURAL HISTORY NO. 322<br />

Fig. 30. The tree resulting from maximum-likelihood analysis <strong>of</strong> first <strong>and</strong> second codon positions <strong>of</strong><br />

RAG1 under its best-fitting model (GTR + I + C, ln-likelihood 5 26343.58; table 11). The single<br />

synapomorphic deletion event in this gene is indicated with a vertical gray bar. Conventions for indicating<br />

nodal support are described in the caption to figure 28. Asterisks indicate nodes resolved by ML analysis<br />

<strong>of</strong> the original data that lack bootstrap support.

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