Angulifemur unidigitis Zhang, 1997

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/0A287487-C7D7-5FC9-8005-B5E7B7CD41E8
treatment provided by	ZooKeys by Pensoft
scientific name	Angulifemur unidigitis Zhang, 1997
status

Treatment

Angulifemur unidigitis Zhang, 1997 View in CoL

Figs 1 View Figure 1 , 2 View Figure 2 , 26A, B View Figure 26 , 28 View Figure 28

Angulifemur unidigitis Zhang, 1997: 2, figs 12-15.

Paracortina wangi Stoev, 2004: 2, figs 1-11; Stoev et al. 2008: 17 (synonymisation).

Material examined.

1 female, China, Yunnan, Menzi County, Wulichong Sinkhole Cave ( No 3), 04.01.1989, P. Beron leg. (BG- NMNHS-INV-000000006259 NMNHS) , Stoev det. 25.07.2003, 1 male, China, Yunnan, Menzi County, Long Bao Pao Dong (cave), 07.01.1989, P. Beron leg. (BG- NMNHS-INV-000000006260 NMNHS).

Diagnosis.

It can easily be distinguished from A. tridigitis by the much shorter and upright coxal process, a distally more sinuous telopodite, bearing a pointed process at its mid length (Tp); distal part of telopodite with one tooth-shaped process (k).

Descriptive notes.

Habitus matching the description of Paracortina wangi ( Stoev 2004). The species is characterised by long walking legs and antennae, absence of projection on head vertex in adult males, reduced number of ommatidia and a strongly enlarged organ of Tömösváry (Fig. 1 View Figure 1 ).

Male sexual characters.

Leg-pairs 1 and 2 reduced and more setose than the rest, showing prefemoral and tarsal brushes (Fig. 1E View Figure 1 ), leg-pair 2 with a small anterior process and posterior gonopore, leg-pair 3 with a smaller triangular process on coxa (Fig. 1E View Figure 1 ), leg-pair 6 with one small hyaline triangular mesal process on coxa, prefemur showing proximally a constriction on the posterior margin (Fig. 26A View Figure 26 ), leg-pair 7 with two coxal processes (Fig. 26B View Figure 26 ), a long subfalcate mesal process and a shorter, larger, subtriangular one (corresponding to f and t, respectively in Stoev 2004: fig. 6), coxal sacs (Fig. 1E View Figure 1 ) present on leg-pair 3-23.

Gonopods (Fig. 2 View Figure 2 ). Each gonopod with two short, clavate, setose prefemoroidal processes (pf1 and pf2), with pf1 slightly larger and more setose than pf2 (Fig. 2A, C View Figure 2 ). Coxa with two reduced processes on the median margin: (a) a rounded lobe directed mesad (Fig. 2A, C, D View Figure 2 ), and (b) a reduced, cone-shaped one, pointing distad (Fig. 2 A, B, D View Figure 2 ). Telopodital (T) stem proximally broad, with a pointed triangular projection (Tp) at the third to mid-length of its posterior margin, marking an abrupt twist and narrowing of the process (Fig. 2A-D View Figure 2 ). Distal half of T sinusoidal, gently narrowing distad, and bent laterad. Distal part of T darkly pigmented, with a sharp triangular tooth (k) and a much smaller blunt one (tb) on the lateral margin (Fig. 2B-D View Figure 2 ). T further narrowing distad, marking a complete loop, its apex projecting in a short curved downturned process, bifurcated into solenomere (s) and parasolenomere (ps).

Comments.

The specimens studied here are part of the type series of the species Paracortina (Altum) wangi Stoev, 2004. Stoev (2004) described this millipede as a new species of the genus Paracortina and subgenus Paracortina Altum based on the presence of five posterior setae on the sixth hemipleurite. While describing P. wangi Stoev (2004) was unaware of the publication of Zhang (1997). Being also described from the same type locality (Longbaopo-Wulichong cave system) in Mengzi County, Stoev et al. (2008) subsequently synonymised P. wangi with Angulifemur unidigitis .

Distribution.

Until now, the species is known only from Long Bao Pao - Wulichong cave system and Laoxiao Cave, Mengzi County, China (Fig. 28 View Figure 28 ).