Enghoffosoma

Nguyen, Anh D. & Golovatch, Sergei I., 2016, The millipede genus Enghoffosoma Golovatch, 1993 recorded in Vietnam for the first time, with descriptions of three new species (Diplopoda, Polydesmida, Paradoxosomatidae), Zootaxa 4139 (2), pp. 151-166 : 166

Key to species of Enghoffosoma known to occur in Vietnam

(based on gonopod characters alone)

1 Gonopod postfemoral region consisting only of a solenomere and a process e .................................... 2

- Gonopod postfemoral region consisting of a solenomere and processes e and p .................................... 4

2 Process e small, triangular ( Figs. 7–8 )................................................... E. triangulare sp. nov.

- Process e large, shaped otherwise....................................................................... 3

3 Process e stout, straight, slightly shorter than solenomere ( Figs. 13–14 )......................... E. digitatum sp. nov.

- Process e lobe-shaped, curved ventrad, much shorter than solenomere ( Figs 4–5 )......................... E. fedorenkoi

4 Femorite with an apical shelf b. Process p small, retrorse and tuberculiform ( Figs 10–11 )............ E. retrorsum sp. nov.

- Femorite without apical shelf b. Process p large, shaped otherwise............................................. 5

5 Solenomere large, twisted in distal part; process e large, serrate at anterior margin; process p anchor-shaped; apical self b absent ( Fig. 2 )........................................................................... E. anchoriforme

- Solenomere large, spiralled; distal part with a tooth terminating the seminal groove; process e small, tuberculiform; process p small, erect, subrectangular ( Fig.1 )............................................................ E. lanceolatum

Figures

FIGURE 1. Enghoffosoma lanceolatum Likhitrakarn, Golovatch & Panha, 2014, male from Yok Don National Park, Vietnam. Right gonopod, mesal view (A), ventral view (B), and lateral view (C).

FIGURE 2. Enghoffosoma anchoriforme Likhitrakarn, Golovatch & Panha, 2014, male from Cat Tien National Park, Vietnam. Right gonopod, mesal view (A); postfemoral region, mesal view (B).

FIGURE 4. Enghoffosoma fedorenkoi (Golovatch, 2016), comb. nov., male from Chu Yan Sin National Park, Vietnam. Right gonopod, lateral view (A); mesal view (B). Scale = 1 mm.

FIGURE 5. Enghoffosoma fedorenkoi (Golovatch, 2016), comb. nov., male from Chu Yan Sin National Park; Vietnam. Left gonopod, lateroventral view (A), mesoventral view (B).

FIGURE 7. Enghoffosoma triangulare sp. nov. Holotype, right gonopod, lateral view (A); mesal view (B). Scale = 1 mm.

FIGURE 8. Enghoffosoma triangulare sp. nov. Holotype, right gonopod, lateroventral view (A); postfemoral region, lateroventral view (B).

FIGURE 10. Enghoffosoma retrorsum sp. nov. Holotype, right gonopod, lateral view (A); mesal view (B). Scale = 1 mm.

FIGURE 11. Enghoffosoma retrorsum sp. nov. Holotype, right gonopod, mesal view (A); postfemoral region, mesal view (B).

FIGURE 13. Enghoffosoma digitatum sp. nov. Holotype, right gonopod, mesal view (A); lateral view (B). Scale = 1 mm.

FIGURE 14. Enghoffosoma digitatum sp. nov. Holotype, right gonopod, mesal view (A); postfemoral region, mesal view (B).