18S rRNA variability maps reveal three highly divergent, conserved motifs within Rotifera

Table 1 Average pairwise distances (A, uncorrected p distances ± SE; B, GTR distances ± SE) within (along the diagonal) and between (below the diagonal) the major rotifer clades determined using PAUP* v4.0a166 [19]

Taxon	Bdelloidea	Monogononta	Seisonacea
A
Bdelloidea	0.0219 ± 0.0015 (595)
Monogononta	0.1704 ± 0.0002 (5668)	0.0270 ± 0.0001 (13,039)
Seisonacea	0.2226 ± 0.0011 (35)	0.1759 ± 0.0008 (162)	n/a (0)
Calicophoron calicophorum	0.2140 ± 0.0015 (35)	0.1406 ± 0.0006 (162)	0.2191 (1)
B
Bdelloidea	0.0226 ± 0.0008 (595)
Monogononta	0.1969 ± 0.0002 (5668)	0.0278 ± 0.0001 (13,039)
Seisonacea	0.2692 ± 0.0016 (35)	0.2041 ± 0.0010 (162)	n/a (0)
Calicophoron calicophorum	0.2556 ± 0.0021 (35)	0.1568 ± 0.0007 (162)	0.2646 (1)

The number of pairwise comparisons is given in parentheses; it can be lower than the theoretical maximum of (n² − n)/2 because of undefined distances (e.g., when the sequences of a species pair do not overlap). The corresponding average distances within all Rotifera were 0.0701 ± 0.0005 (uncorrected p) and 0.0787 ± 0.0006 (GTR) (each 19,499 comparisons) and between all Rotifera and Calicophoron calicophorum were 0.1539 ± 0.0021 (uncorrected p) and 0.1748 ± 0.0028 (GTR) (each 198 comparisons)

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