TABLE 1. Difference among the new species and their morphologically similar and geographically nearest species.
M. chimalapana M. wendtii M. sinacacolinii M. heribertoi M. lacandonica M. uxpanapana M. perezfarrerae
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Trees (m) 30.0–40.0 7.0 up to 25.0 23–60.0 28–35 25.0–35.0 18.0–20.0
Petioles (cm) 4.0–6.6 × 0.1–0.2 2.5–4.0 × 0.4–0.5 1.5–6.0 × 0.4–0.6 9.5–10.0 × 0.2–0.3 6.0–7.5 3.2–5.0 × 0.2–0.3 8.0–12.7 × 0.8–0.9
Leaf blade size (cm) 12.3–17.0 × 5.8–8.4 16.0–44.0 × 13.0– 14.0 12–37.0 × 5.0–12.5 12.5–17.0 × 6.3–6.5(– 10.0) 18.0–30.0 14.5–20.5 × 8.0–9.5 17.8–25.0 × 9.5–14.3
Secondary vein number 7–10 18–19 12–14 12–14 10–11 8–9 7–9
Longest peduncular internodes in mature flowers (mm) 19.0–20.0 × 3–3.8 20.0 × 3.0–4.0 5.0–8.0 × 6.0–7.0 12.0–13.0 × 22.0–23.0 15.0 × 15.0 9.0–10.0 × 13.0–14.0 11.0–12.0 × 14.0–15.0
Flower buds (cm), shape 5.0–6.0 × 1.1 narrowly ovoid 4.0 × 1.7–2.0 narrowly ovoid 4.0 × 3.0–3.5 broadly ellipsoid 5.5 × 6.8 broadly ellipsoid 3.5–4.5 × 3.0– 3.5 ovoid 6.5 × 5.0 ovoid 8.0–12.0 × 5.6–8.4 broadly ovoid
Sepals oblong oblong broadly obovate broadly ellipsoid broadly obovate to sub-rotund broadly obovate broadly ovate
Stamen number 48–50 71 71–112 217 198–248 192–216 175
Fruit size (cm), shape 5.5–6.5 × 2.5–3.0 rhomboid to narrowly ellipsoid unknown rhomboid (4.5–)5.4 (–7.5) × 1.8(–5.0) sub-globose 5.8–8.3 × 5.5–8.2 spheroid 11.5 × 9.5 broadly ovoid 6.0–8.0 × 4.5–5.5 broadly ovoid 8.0–12.0 × 5.6–8.4 broadly ovoid to ellipsoid
Carpel detachment from axis unicarpellate unknown unicarpellate multi-carpellate irregular masses unicarpellate unicarpellate multi-carpellate irregular masses
Number carpels, basal carpel size (cm) 8–9 2.7–3.8 × 0.9–1.3 19–28 immature 20–28 1.8–3.75 × 1.3–2.0 36–46 4.2–4.3 × 1.1–1.2 61–70 4.5–4.6 × 1.4–1.5 57–58 2.1–1.7 × 0.9–1.4 89–92 3.5–4.7 × 1.4–1.5
Elevation (m) 300–525 400–450 200–550 350–400 150 80–150 800–850