Table 3.
Morphological characteristics of Macrobrachiumlaevis sp. nov. and the congeners.
| M.laevis sp. nov. | M. maculatum | M. asperulum | M. fukienense | M. inflatum | M. nipponense | M. dongaoensis | |
|---|---|---|---|---|---|---|---|
| Rostrum | |||||||
| Number of dorsal teeth | 8–12 | 9–14 | 8–12 | 7–9 | 12–17 | 9–13 | 10–13 |
| Number of postal orbit teeth | 3–4 | 3–5 | 2–3 | 1–2 | 3–4 | 2–3 | 4–5 |
| Number of ventral teeth | 2–3 | 3–5 | 2–3 | 1–2 | 3–5 | 2–3 | 1–3 |
| Ratio of RL/CL | 0.5–0.7 | 0.6–0.7 | 0.6–0.7 | 0.6 | 1.0 | 0.6–0.8 | 0.5–0.7 |
| First pereiopod Ratio of f/p | 0.73–0.97 | 0.76–0.83 | 0.78 | 0.85 | 0.83–0.91 | 0.8 | 1.0 |
| Second pereiopod | |||||||
| Ratio of palm L/b | 4.8–5.3 | 4.5–6.0 | 5.0–6.5 | 4.3 | 3.5–3.6 | 4.7–7.0 | 4.3–4.9 |
| Ratio of f/p | 0.66–0.86 | 0.62–0.78 | 0.5–0.6 | 0.4–0.5 | 0.82–1.0 | 0.6–0.7 | 0.69–0.78 |
| Ratio of c/p | 0.8–1.0 | 0.8–0.9 | 0.79–0.84 | 0.76–0.87 | 1.4 | 1.4 | 0.93–1.0 |
| Ratio of c/m | 1.2–1.4 | 1.1–1.3 | 1.3–1.4 | 1.1 | 1.4–1.5 | 1.6–1.7 | 1.1–1.4 |
| Ratio of i/m | 0.83–1.0 | 0.76–1.0 | 0.78 | 0.6–0.7 | 1.1 | 0.74–0.9 | 0.9 |
| Ratio of f/m | ≥1 | <<1 | <<1 | <<1 | =1 | <1 | >1 |
| Microspinules on every segment | Smooth, except magrins of palm with scatted microspinules | All segments with | All segments with | All segments with | All segments without, except pout margin of palm with | All segments with | All segments with |
| Distribution of the second tooth of moveable finger | On the proximal 1/4 | On the proximal 1/5 | On the proximal 2/5 | On the proximal 1/2 | On the proximal 1/7 | On the proximal 1/5 | On the proximal 1/5 |
| Eggs size (mm) | 1.1–1.4 × 1.5–1.8 | 1.6–1.7 × 2.1–2.4 | 1.08–1.26 × 1.50–1.76 | 1.5–1.6 × 2.1–2.2 | 0.53–0.59 × 0.62–0.69 | 0.54–0.68 × 0.72–0.86 | 0.33–0.42 × 0.37–0.44 |
| Scaphocerite l/b | 2.4–2.6 | 3.5 | 2.8–3.2 | 2.5–2.8 | 3.4 | 2.7–3.1 | 3.4 |