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Table 3 Meristic data for adult specimens of two distinct karyotypic forms belonging to the Gymnotus carapo species complex from the Eastern Amazon (EA) (G. carapo 2n = 42 and G. carapo 2n = 40).

From: Chromosomal evidence for a putative cryptic species in the Gymnotus carapo species-complex (Gymnotiformes, Gymnotidae)

  G. carapo 2n = 42 G. carapo 2n = 40 G. carapo EA
  Range Median*
Mode**
Range Median*
Mode**
Range Median*
Mode**
BND 19–27
(9)
22* 14–21
(7)
18.5* 21–25
(16)
23*
AFR 170–220
(3)
196.7* 190–225
(2)
202.5* 190–235
(10)
222*
P1R 13–16
(9)
14** 15–17
(7)
15** 13–15
(16)
14**
SAL 6–8
(9)
7** 6–8
(7)
7** 6–7
(16)
7**
CEP 3–4
(3)
3** 3–4
(3)
3** 3–4
(16)
3**
APS 7–9
(9)
9** 8–10
(7)
9** 7–8
(7)
8**
PCV 33
(1)
- 34
(1)
- 32–35
(9)
33
PLR 43–51
(9)
47* 40–48
(7)
45* 41–54
(15)
48*
PLL 87–104
(4)
93.5* 84–89
(3)
84 68–110
(15)
77*
VLR 7–9
(9)
9** 8–10
(7)
9** 0–8
(10)
4**
  1. For reference we include data for EA populations of G. carapo taken from [10].
  2. Abbreviations: BND: vertical bands; AFR: anal-fin rays; P1R: pectoral-fin rays; SAL: scale rows above lateral line; CEP: caudal electrocyte rows; APS: scale rows over anal-fin pterygiophores; PCV: pre-caudal vertebrae; PLR: pored lateral line scales to first ventral ramus of lateral line; PLL: total pored lateral line scales; VLR: ventral rami of lateral line. N values (in parentheses) vary because measurements were excluded from specimens with damage or unusual preservation artifacts. The mode and median are used as measures of central tendency following protocol for comparative studies of Gymnotus.