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Table 1 Comparison of morphological characters among Paulinella species.

From: A single origin of the photosynthetic organelle in different Paulinellalineages

  This study P. chromatophora P. ovalis P. intermedia P. indentata
  FK01
(n = 17)
M0880/a
(n = 13)
Lauterborn 1895, Kies 1974 Johnson et al 1988 Vørs 1993 Hannah et al 1996
Plastid + + + - - -
Length (μm) 15 – 17 23 – 27 20 – 30 4.5 6.6 11 – 17
Width (μm) 10 – 11 16 – 20 15 – 20 3 2.9 8 – 10
No. of scales/column 10 – 11 12 – 14 11 – 12 5 – 6 6 – 7 6 – 7
No. of columns 5 5 5 5 NA Staggered rows
Oral scales 5 3 3 3 3 2 – 4
Fine-pored external scales + (distinct) + (not distinct) NA + - + (3 – 4 rows of pores at the end of scales)
Scale feature "Sieve-plate" on the internal surface "Sieve-plate" on the internal surface "Sieve-plate" on the internal surface One-ridges and hollow scales Smooth scales Two-ridges and hollow scales