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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