Paracortina thallina (Wang & Zhang, 1993)

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

publication ID	https://dx.doi.org/10.3897/zookeys.1187.113473
publication LSID	lsid:zoobank.org:pub:2F796283-3187-447E-88C6-4B61C50B640C
persistent identifier	https://treatment.plazi.org/id/2C7AE4DB-7B8F-5334-9693-F44B84586552
treatment provided by	ZooKeys by Pensoft
scientific name	Paracortina thallina (Wang & Zhang, 1993)
status

Treatment

Paracortina thallina (Wang & Zhang, 1993) View in CoL

Figs 14 View Figure 14 , 15 View Figure 15 , 16 View Figure 16 , 26D, E View Figure 26 , 28 View Figure 28

Relictus thallinus Wang & Zhang, 1993: 380, figs 14-18.

Paracortina thallina : Stoev and Geoffroy 2004: 103, key; Liu and Tian 2015: 139, key.

Material examined.

1 male, China, Yunnan, Shangrila, Degen, SW of Benzibanzhen, 214 Nm Road, NE slope of SE Baima Mt. Range , 28°6'50"N, 99°12'24"E, alt. 3260, 07.06.2013, I. Belousov, I. Kabak & G. Davidian leg. (Rd 5344 ZMUM), Stoev & Akkari det. GoogleMaps 2023.

Diagnosis.

Most similar to P. leptoclada in the expanded distal part of the telopodite bearing a large rounded lateral lamella and a hook-shaped process pointing anterodistad. Different in the shape and orientation of the distal lamella, (vs laterally expanded and folded lamella and a shorter mesal coxal process in P. leptoclada ).

Descriptive notes.

Male with 55 PTs + Telson. Length ca 39.7 mm. Live colour unknown. Preserved specimen with a general dark brown to greyish colour, legs and antennae yellowish with a dark sputter (Figs 14 View Figure 14 , 15A View Figure 15 ), prozona greyish with fine brown sputter (Figs 14A View Figure 14 , 15B View Figure 15 ); metazona dark greyish brown dorsally especially on crests, anterior part greyish with a fine pale brown sputter interrupted by larger irregular yellow alveolate spots, colour gradually fading below the ozopores and ventrally. Head with dark pigmentation on the vertex and frons, mandibular stipes and gnathochilarium yellowish (Fig. 14B, C View Figure 14 ). Fields of ommatidia subtriangular, composed of ~ 62 ommatidia in ten rows. Organ of Tömösváry very large, ~ 0.8 mm, situated close to and touching the anterior side of eye (Fig. 14B View Figure 14 ).

Male sexual characters.

Head with a triangular protruding projection on vertex (Figs 14B, C View Figure 14 , 15A View Figure 15 ). Leg-pairs 1 and 2 reduced and setose (Fig. 14C View Figure 14 ), showing prefemoral and tarsal brushes, leg-pair 2 with a dome-shaped anterior process on coxa and posterior gonopore, leg-pair 4 with an anterior triangular process on coxa (Fig. 15A View Figure 15 ), leg-pair 6 with a small mesal tooth on coxa (Fig. 26D View Figure 26 ), leg-pair 7 with one mesal and one lateral slender hyaline pointed processes on coxa (Fig. 26E View Figure 26 ), coxal sacs (Fig. 15C View Figure 15 ) noticeable from leg-pair 3-23.

Gonopods (Figs 15D, E View Figure 15 , 16 View Figure 16 ). Diverging. Each gonopod with two large, setose, clavate prefemoroidal processes (pf1, pf2) with pf1 slightly larger than pf2 (Fig. 15D View Figure 15 ); coxa with a large lobe laterally (Cl) and a low projection (Ca) anteriorly (Figs 15D View Figure 15 , 16 View Figure 16 ), a mesal anterior triangular process (a) and a long falcate coxal processes (b) reaching the distal part of the telopodite (both broken in the studied specimen). Telopodite (T) with a long slightly curved stem, distally abruptly expanding in a sub-rectangular posterior process with rounded margins (Fig. 16C, D View Figure 16 ) connected to a transparent jagged lamella (dl) projecting anteriad (Fig. 15D View Figure 15 ), apically folded (Fig. 16C, D View Figure 16 ), and a curved hook-shaped process pointing meso-anteriad (Fig. 16 View Figure 16 ), narrowing towards its apex and bifurcating into the opening of the solenomere (s) and parasolenomere (ps).

Distribution.

Batang County, Sichuan, and Shangrila County, Yunnan, China (Fig. 28 View Figure 28 ).

Comments.

This is the second record of the species since its original description. Here we provide the first micrographs illustrating the habitus of the species (Figs 14 View Figure 14 , 15 View Figure 15 ).