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Table 1 Sequence composition within selected taxa (no = number of specimens) characterized using the disparity index (I D ), compositional distance (Dc), percent GC content, gene length in base pairs (bp) and average branchlengths (brls) with standard deviation (σ).

From: Fast evolving 18S rRNA sequences from Solenogastres (Mollusca) resist standard PCR amplification and give new insights into mollusk substitution rate heterogeneity

Taxa No I D Dc GC bp Brls*10 σ*10
Outgroup 41 0.42 0.52 48.5 1682.9 0.60 0.41
Polyplacophora 32 0.08 0.11 49.9 1739.8 0.46 0.08
Monoplacophora 1 n/c n/c 50.4 1767.0 0.38 n/c
Scaphopoda 22 0.14 0.21 53.5 1835.8 1.47 0.19
Caudofoveata 3 0.00 0.01 55.8 1785.0 1.82 0.08
Solenogastres 3 0.18 0.23 63.9 2100.0 5.27 0.24
Cephalopoda        
   Coleoidea 74 0.19 0.28 60.3 2275.3 7.48 1.37
   Nautiloidea 3 0.31 0.34 52.9 2360.0 5.40 0.35
Gastropoda        
   Vetigastropoda 31 0.03 0.08 51.2 1784.9 2.10 0.12
   Neritimorpha 5 0.00 0.02 50.6 1736.0 0.43 0.05
   Neomphalida 3 0.09 0.14 51.3 1790.7 1.48 0.02
   Cocculinida 1 n/c n/c 50.1 1749.0 4.11 n/c
   Patellogastropoda 9 0.42 0.50 57.2 2011.9 5.99 0.05
   Caenogastropda 116 0.01 0.02 50.7 1745.7 0.86 0.05
   Heterobranchia 183 1.86 1.96 55.3 1796.5 2.18 1.54
Bivalvia        
   Protobranchia 18 0.12 0.17 50.6 1751.6 0.46 0.24
   Paleoheterodonta 13 0.02 0.05 49.6 1750.5 0.47 0.08
   Pteriomorpha 111 0.06 0.10 49.6 1742.1 0.48 0.38
   Heterodonta (ex. Anom.) 160 0.25 0.34 52.2 1760.2 2.01 0.48
   Anomalodesmata 41 0.11 0.20 51.7 1874.7 2.86 0.27
  1. * Brls and σ values were multiplied with 10 for better readability. We used all sequences available for the Mollusca, Sipuncula and Kamptozoa with a length over 1,600 bp, supplemented by some other Lophotrochozoa and Priapulus caudatus.
  2. Sequence composition of Mollusca within selected taxa measured using the disparity index (I D ), compositional distance (CD), GC content [%], gene length in base pairs (bp) and average branch lengths (brls) and their standard deviation (σ). Brls and σ values were multiplied with 10 for better readability. We used all sequences available for the Mollusca, Sipuncula and Kamptozoa above 1,600 bp supplemented by several other Lophotrochozoa and Priapulus caudatus.