Pseudodesmus sp. 2

Nguyen, Anh D., Nguyen, Lien T. P. & Korsós, Zoltán, 2024, A review of the millipede genus Pseudodesmus Pocock, 1887 (Diplopoda, Platydesmida, Andrognathidae) from Vietnam, with descriptions of five new species and notes on its phylogeny, Zoosystematics and Evolution 100 (4), pp. 1515-1541 : 1515-1541

Pseudodesmus sp. 2

Fig. 26

Material examined.

Vietnam • 1 female; Quang Binh Province, Bo Trach Dist., Son Doong cave, outside cave, back entrance ; 17.48667 ° N, 106.28500 ° E; 16 Jan. 2023; A. D. Nguyen leg.; IEBR-Myr 987 .

Description.

Measurements: 55 body rings plus telson, length ca. 10.9 mm, midbody width 2.7 mm.

Quite convex body, almost cylindrical (without paraterga).

Collum bilobed, narrow, a little bit narrower than head, 2 pair of tubercles, posterior ones stronger.

Tergite tubercles on body rings 2–7 strong and wide, but from there onwards decreasingly inconspicuous, from 8 th backwards terga are clearly divided in anterior and posterior parts, also by coloration: light anterior part wider, light posterior part a bit narrower, tubercles disappearing, only weak transversal ridges appear. Telson, including para- and hypoproct dark brown. Coxal sacs on legs small, weak.

Color of ethanol-preserved specimens unique: dark thin median line, terga broadly light, almost white, base of all paraterga dark brown, edge of paraterga light yellow: in general looks like three longitudinal dark stripes, one thin median line and two wider parallel brown stripes. Head color is different: two white bumps (almost like large compound eyes), frontale and mandibulae dark brown, antennae dark brown.

Figures

Figure 26. Pseudodesmus sp. 2. Female (IEBR-Myr 987). A, B. Habitus, dorsal view, under normal light (A), dorsal view, under UV light (B). Scale bars: 1 mm.