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Table 2.

Morphological comparison among P. pingi and other similar species of Protoopalina.

Species BL BW Nn NL NW Ns Source of data
P. pingi 93.6–144.0 21.6–48.4 4 7–15 5–11.5 18–29 Present paper
P. caudata michyla 120–290 40–70 2 15–23 15–18.8 Nie (1935) [18]
P. quadrinucleata 58–109 10–18 1–8 Lu (1945) [12]
P. heleophrynes 21–54 5.7–12 2 Delvinguier et al. (1995) [5]
P. pomacantha 157.2 28.3 2 14.6 7.7 26.3 Grim et al. (2000) [9]

Measurement in μm; BL = Body length, BW = Body width, Nn = Number of nuclei, NL = Nucleus length, NW = Nucleus width, Ns = Number of total somatic kineties.

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