Open Access
Research Article

Table 1

A comparison of morphometric and meristic features of females of Brachiella species.

Parameter Species
B. malayensis n. sp. B. magna B. cybii B. thynni B. elegans B. quaternia B. seriolae
Cephalosome length (CL) [mm] 3.00 6.57 7.47 6 2.78 1.67 2.75
Cephalosome width [mm] 1.35 1.26 2.20 1 1.22 1.17 1.40
Trunk length (TL) [mm] 3.39 7.94 12.52 6 4.78 4.22 4.83
Trunk width [mm] 1.09 2.07 2.00 3 1.44 1.33 2.58
Total length [mm] 6.39 15.0 20.0 12 7.56 5.89 7.58
TL–CL ratio 1.13 1.33 1.68 1.00 1.72 2.53 1.76
Dorsoposterior process length (DPL) 1.48 4.20 4.51 10.00 1.00 0.78 1.80
Ventroposterior process length (VRL) 1.35 4.23 3.74 7.50 3.33 L, 4.33 R 2.89 5.20
DPL–TL ratio 0.44 0.53 0.23 1.38 0.21 0.18 0.37
VRL–TL ratio 0.44 0.53 0.19 1.04 0.70 L, 0.91 R 0.68 1.08
Anal tubercle Present Present Present Present Absent Present
Antennulary segmentation 4 4 4 4 4 3 or 4* 4
No. of elements on antennary endopod tip 3 3 3 3 2
Anteriormost seta on maxillulary palp Developed Developed Developed Reduced Reduced Reduced
Maxillae length < CL? = CL >> CL < CL < CL < CL < CL
Patch of denticles on maxillipedal subchela Absent Present Present Present Present Present
Maxillipedal claw with auxiliary spine No No No Yes Yes Yes

Measurement of B. magna based on Kabata [22]; measurements for B. cybii were based on direct measurement form Pillai et al.’s [49] figure; measurements for B. thynni were based on Wilson [64]; measurements for B. elegans, B. quaterina, and B. seriolae were based on figures or measurement of Ho and Do [16];

*

from Kabata [21]; –: no data provided; L = left. R = right.

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