Levizonus nakhodka, Mikhaljova, 2021

Mikhaljova, Elena V., 2021, Review of the millipede genus Levizonus Attems, 1898, with description of a new species from the Far East of Russia (Diplopoda, Polydesmida, Xystodesmidae), European Journal of Taxonomy 751, pp. 159-184 : 172-174

Levizonus nakhodka sp. nov.

urn:lsid:zoobank.org:act:E92C7403-59C4-4AAC-A645-81075397DCE6

Figs 7–9 , 13

Diagnosis

The species differs from congeners mainly by the configuration of the gonopod telopodite with subapical large K laterally ( Fig. 8A ) (vs without the outgrowth in other congeners excluding L. thaumasius and L. circularis ; small not knee-shaped in both), with central apical arcuate P carrying numerous, small outgrowths ( Fig. 8B ) (vs without protrusion and outgrowths in L. montanus , L. takakuwai , L. malewitschi , L. laqueatus , L. distinctus ).

The species seems to be particularly similar to L. thaumasius but differs in a telopodite apex strongly curved caudad and as a result a large well-developed lateral subapical K ( Fig. 8C ) (vs low, not kneeshaped outgrowth (K1) in L. thaumasius , Fig. 10D ), as well as the narrower apex of telopodite, permanent presence of a central P on telopodite apex and by a stick-like SL ( Fig. 8B–D ).

Etymology

The specific epithet refers to the type locality, a noun in apposition.

Material examined

Holotype

RUSSIA • ♂; Primorskiy krai, environs of Nakhodka City; 1–3 Aug. 2015; S.A. Shabalin leg.; Quercus forest with fern; FSCB 12020 .

Paratypes

RUSSIA • 2 ♂♂, 1 fragment; same locality as for holotype; 30 Jul.–1 Aug. 2015; S.A. Shabalin leg.; FSCB 22020 • 2 ♂♂; same locality as for holotype but Quercus forest with Lespedeza ; 30 Jul.– 1 Aug. 2015; S.A. Shabalin leg.; FSCB 32020 • 3 ♂♂; same locality as for holotype; 1–3 Aug. 2015; S.A. Shabalin leg.; FSCB 42020 • 2 ♂♂; same locality as for holotype but Quercus forest with Lespedeza ; 1–3 Aug. 2015; S.A. Shabalin leg.; FSCB 52020 • 1 ♂, 1 ♀; same locality as for holotype but 42°50´27.9˝ N, 132°47´30.5˝ E; 19–22 Aug. 2015, S.A. Shabalin and E. Poletkov leg.; FSCB 142020 • 1 ♂, 1 ♀; same locality as for holotype but 42°53´13.5˝ N, 132°43´04.8˝ E; Sep. 2015; Maslovsky leg.; ZMUM • 2 ♀♀; same locality as for holotype but 42°53´13.5˝ N, 132°43´04.8˝ E; Sep. 2015; Maslovsky leg.; FSCB 62020 • 1 ♂; same locality as for holotype; 7 Sep. 2015; Maslovsky leg.; FSCB 72020 • 1 ♀; same locality as for holotype but 42°53´22.0˝ N, 132°49´37.2˝ E; 9–12 Sep. 2015, S.A. Shabalin and S.Yu. Storozhenko leg.; FSCB 82020 • 1 ♂; same locality as for holotype but 42°53´05.4˝ N, 132°48´47.5˝ E; 9–12 Sep. 2015, S.A. Shabalin and S.Yu. Storozhenko leg.; Ulmus , Fraxinus , Alnus ; FSCB 92020 • 4 ♂♂, 2 ♀♀; same locality as for holotype but Ulmus , Fraxinus ; 11– 14 Sep. 2015; S.A. Shabalin and S.Yu. Storozhenko leg.; FSCB 102020 • 2 ♂♂, 1 ♀; same locality as for holotype but 42°53´11.6˝ N, 132°48´03.6˝ E; 11–14 Sep. 2015; S.A. Shabalin and S.Yu. Storozhenko leg.; Quercus forest with Lespedeza ; FSCB 112020 • 2 ♂♂, 1 ♀, 1 fragment; same locality as for holotype but 42°53´22.0˝ N, 132°49´32.7˝ E; 12–15 Sep. 2015; S.A. Shabalin and S.Yu. Storozhenko leg.; FSCB 122020 • 1 ♂; same locality as for holotype but 42°53´07.6˝ N, 132°48´46.3˝ E; 12–15 Sep. 2015; S.A. Shabalin and S.Yu. Storozhenko leg.; Quercus dentata forest; FSCB 132020 .

Description

Male

SIZE. Body 25–27 mm long, 4.0– 4.3 mm wide.

COLOUR. Shining whitish in alcohol, tergites often beige.

HEAD. Epicranial suture not quite reaching the level of antennal sockets. Lateral excavation of head relatively deep for accommodation of antennae. Antennae rather slender, in situ reaching to the front edge of ring 4.

BODY. Metaterga without bosses. Paraterga rounded laterally. Starting from ring 12–13, they have rounded, though never clear-cut, caudal corners.

TELSON. Caudal dorsal projection with relatively long sparse setae, blunt apically, often apex with tiny excavation.

LEGS. Each coxa of hind legs distoventrally with a small conical outgrowth. Coxa of leg 2 with a large setigerous process curved forward and terminating a vas deferens.

GONOPODS. Distal part of coxite with three strong setae mesally (one) and laterally (two) ( Fig. 9A ). Telopodite laterally with longitudinal striae along almost its entire length ( Fig. 8A ). Telopodite apex relatively sharply curved mesad, as result distal part of the telopodite laterally carrying a large subapical K ( Figs 8A, 8C , 9B ). Apical part of telopodite with an external stick-like process (= SL) curved mesad as well as always with central P carrying numerous, small outgrowths ( Figs 8B–C , 9B ). Inner edge of telopodite apex with several small outgrowths.

Female

SIZE. Body 25–27 mm long, 4.0– 4.7 mm wide. Body often stouter than in male.

LEG 2. Coxa 2 with a small, pointed, setigerous process.

VULVAE. As in Fig. 8E .

Distribution

Russia, Far East, Primorskiy krai.

Figures

Fig. 7. Levizonus nakhodka Mikhaljova sp. nov., ♂♂, paratypes (FSCB 32020, 72020, 112020). A, D. Gonopod, mesal view. B, E. Gonopod apex, mesoventral view. C. Gonopod, lateral view. Scale bars: A, C = 200 μm; D = 100 μm; B, E = 20 μm.

Fig. 8. Levizonus nakhodka Mikhaljova sp. nov., ♂♂, paratypes (FSCB 22020, FSCB 112020) and ♀, paratype (FSCB 122020). A. Gonopod telopodite, lateral view. B, D. Gonopod apex from slightly different angles, ventral view. C. Distal part of gonopod, lateral view. E. Vulva, mesal view. Scale bars: A, D–E = 200 μm; B, C = 20 μm.

Fig. 9. Levizonus nakhodka Mikhaljova sp. nov., ♂, paratype (FSCB 72020). A. Gonopod, mesal view. B. Gonopod apex, mesal view. Scale bars: A = 1.0 mm; B = 0.1 mm.

Fig. 13. Distribution of species of the genus Levizonus Attems, 1898. Filled square: L. circularis Takakuwa, 1942. Filled circle: L. distinctus Mikhaljova, 1990. Open square: L. laqueatus Mikhaljova, 1981. Open triangle: L. nakhodka Mikhaljova sp. nov. Filled triangle: L. malewitschi Lokschina & Golovatch, 1977. Filled diamond: L. thaumasius Attems, 1898. Heart: L. takakuwai (Verhoeff, 1941). Oval: L. montanus (Takakuwa, 1941).

Fig. 10. Levizonus thaumasius Attems, 1898, ♂♂, ♀ (FSCB 12007, 12016). A. Gonopod, lateral view. B. Gonopod apex, lateral view. C. Gonopod, mesal view. D. Gonopod apex, mesal view. E. Vulva, mesal view. F. Gonopod apex, lateral view. Scale bars: A = 200 μm; C, E–F = 100 μm; B, D = 20 μm.