Paracortina kyrang Nguyen, Stoev, Nguyen & Vu, 2023

Akkari, Nesrine, Macek, Oliver & Stoev, Pavel, 2023, A revision of the millipede family Paracortinidae (Diplopoda, Callipodida), ZooKeys 1187, pp. 341-399 : 341

Paracortina kyrang Nguyen, Stoev, Nguyen & Vu, 2023

Fig. 28

Paracortina kyrang Nguyen, Stoev, Nguyen & Vu, 2023: 183, figs 1-7.

Diagnosis.

The gonopods of this species differ from those of the other congeners in the sinuous aspect of the telopodite, distally narrowing, reminding more of the genus Angulifemur , from which this species differs by the absence of (Tp) process and the presence of a long coxal process (b) reaching the distal part of telopodite.

Descriptive notes.

(based on Nguyen et al. 2023) Species with 68-74 PTs + telson, general colour pale, living specimens greenish-white, head strongly modified in males with a well-protruding projection, 19-20 ommatidia in two or three rows.

Male sexual characters.

PTs 6 and 7 strongly enlarged, leg-pairs 1 and 2 smaller and more setose than the rest, showing femoral and tarsal “brushes”, leg-pair 2 with a small anterior process and posterior gonopore, leg-pair 7 with a round mesal projection and a small spine ( Nguyen et al. 2023: fig. 6a, b), coxal sacs present on leg-pairs 3-26.

Gonopods. Each gonopod with two clavate, slender, and setose prefemoroidal processes (pf1, pf2), coxa low with anterior and lateral rounded lobes and a long falcate mesal process, reaching the distal part of the telopodital stem. Telopodite (T) sinuous bearing a distomesal triangular tooth, further twisted and expanding mesolaterad, then strongly constricted and apically narrowed, terminating in a slender branch bifurcated into solenomere (s) and parasolenomere (ps).

Distribution.

Ky Rang Cave, Quoc Toan commune, Quang Hoa District, Cao Bang Province, Vietnam (Fig. 28 ).

Comments.

Nguyen et al. (2023) described a slightly different chaetotaxy for Paracortina kyrang with two pairs of setae distributed posteriorly on the collum (usually all setae are positioned anteriorly) and five pairs of posterior setae on PT5 (instead of three pairs).

Figures

Figure 28. Distribution map of Paracortinidae in China and Vietnam.