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Table 1 Characterising the earliest splits in the maximum likelihood phylogeny of Nematoda

From: Moving towards a complete molecular framework of the Nematoda: a focus on the Enoplida and early-branching clades

Nematode Taxa and Treatment

Outgroup

Additional Non-nematode Phyla

Earliest Splitting Clade

Bootstrap Support for Earliest Split

All Taxa

Priapulida+Kinorhyncha

Tadigrada, Nematomorpha

Enoplia

19%

All Taxa

Kinorhyncha

(none)

Dorylaimia*

41%

All Taxa

Nematomorpha

(none)

Dorylaimia*

75%

All Taxa

Priapulida

(none)

Dorylaimia*

45%

All Taxa

Tardigrada

(none)

Dorylaimia*

49%

All Taxa (No P-invar estimate)

Priapulida+Kinorhyncha

Tardigrada, Nematomorpha

Enoplia

19%

All Taxa (No P-invar estimate)

Kinorhyncha

(none)

Enoplia

34%

All Taxa (No P-invar estimate)

Priapulida

(none)

Enoplia

29%

All Taxa (No P-invar estimate)

Nematomorpha

(none)

Dorylaimia*

76%

All Taxa (No P-invar estimate)

Tardigrada

(none)

Doryla+Enop

20%

All Taxa (No P-invar estimate)

Tardigrada

Nematomorpha

Dorylaimia*

60%

All Taxa (No P-invar estimate)

Kinorhyncha

Nematomorpha

Enoplia

21%

All Taxa (No P-invar estimate)

Priapulida

Nematomorpha

Doryla+Enop*

39%

All Taxa (No P-invar estimate)

Kinorhyncha

Tardigrada

Enoplia

24%

All Taxa (No P-invar estimate)

Priapulida

Tardigrada

Doryla+Enop*

55%

All Taxa (No P-invar estimate)

Kinorhyncha+Priapulida

(none)

Doryla+Enop*

47%

All Taxa

Kinorhyncha+Priapulida

Tardigrada

Doryla+Enop*

61%

All Taxa

Kinorhyncha+Priapulida

Nematomorpha

Enoplia

32%

All Taxa

Priapulida

Tardigrada, Nematomoprha

Enoplia

19%

All Taxa

Kinorhyncha

Tardigrada, Nematomoprha

Enoplia

30%

All Taxa, Gblocks alignment

Priapulida+Kinorhyncha

Tardigrada, Nematomorpha

Dorylaimia

35%

All Taxa, Gblocks alignment

Nematomorpha

(none)

Dorylaimia*

71%

Trichinellida Removed

Priapulida+Kinorhyncha

Tardigrada, Nematomorpha

Doryla+Enop

48%

Trichinellida Removed

Kinorhyncha

(none)

Enoplia

57%

Trichinellida Removed

Nematomorpha

(none)

Dorylaimia

76%

Trichinellida Removed

Priapulida

(none)

Enoplia

54%

Trichinellida Removed

Tardigrada

(none)

Doryla+Enop

53%

Long Branch, Outlier taxa removed

Priapulida+Kinorhyncha

Tardigrada, Nematomorpha

Enoplia

25%

Long Branch, Outlier taxa removed

Nematomorpha

(none)

Dorylaimia*

69%

  1. Basal split recovered using different combinations of nematode taxa, outgroup taxa, and phylogenetic parameters; all topologies utilized stem/loop gene partitions according to rRNA secondary structure. "Earliest splitting clade" identifies the group that diverges most basally from all other nematodes. "Doryla+Enop" indicates the Dorylaimia and Enoplia as a monophyletic group. Outgroup taxa were chosen according to the phylogeny of animal phyla by Dunn et al. (2008). Asterisk (*) denotes topologies where the Trichnellida and Dorylaimida are recovered as paraphyletic, with Trichnellida splitting first in all cases.