Orientyla dahurica ( Gerstfeldt, 1859 )

Mikhaljova, Elena V., 2021, The millipede family Diplomaragnidae Attems, 1907 in the Asian part of Russia with the descriptions of two new genera and seven new species (Diplopoda, Chordeumatida), Zootaxa 5060 (1), pp. 1-44 : 24

Orientyla dahurica ( Gerstfeldt, 1859)

Figs 28–31

Craspedosoma dahuricum Gerstfeldt 1859: 273 .

Craspedosoma dahuricum — Attems 1904: 49.

Diplomaragna mikhaljovae Shear 1990: 19 , figs.

Diplomaragna mikhaljovae — Mikhaljova 1993: 25; 1998: 35, figs, map; Ganin 1997: 10.

Orientyla mikhaljovae — Mikhaljova 2000: 171, fig.

Orientyla dahurica — Mikhaljova & Golovatch 2001: 110; Mikhaljova & Marusik 2004: 5; Mikhaljova 2004: 121, figs, map; 2009c: 4; 2016: 15; 2007: 82; 2012a: 24; 2012b: 112; 2017: 149, figs, map; Mikhaljova & Lim 2008: 59; Ganin 2009: 153; 2011: 311; Mikhaljova & Sergeev 2021: 171.

Material examined. 2 males, 4 females ( FSCB), Russia, Jewish Autonomous Region, “Bastak” Nature Reserve, Bastak natural landmark, valley of Bastak River , mixed forest with Larix , 10–16.VIII.2005 , leg. L. V. Kapitonova ; 1 male ( FSCB), Russia, Jewish Autonomous Region, environs of Budukan village, Bira River bank, apiary near the Gremyachiy spring, broadleaved forest, 1–5.X.2005 , leg. L. V. Kapitonova ; 1 male ( FSCB), Russia, Primorsky Krai, Dalnerechensky District, near Martynova Polyana village , 9–12.VII.2009, leg. S.A. Shabalin ; 1 male ( FSCB), Russia, Jewish Autonomous Region, protected area of the “Bastak” Nature Reserve, floodplain of Glinyanka River , small-leaved forest, 48˚51′48′′ N 133˚01′12,40′′ E, 19.X.2016 , leg. P. V. Budilov .

Distribution. Russia: Siberia (eastern part of Zabaikalsky Krai, the border between Zabaikalsky Krai and Amurskaya Oblast), Far East (Primorsky Krai, Amurskaya Oblast, Jewish Autonomous Region, southern part of Khabarovsky Krai); North Korea.

Remarks. This species was originally described as Craspedosoma dahuricum from near the mouth of the Shilka River, Chitinskaya Oblast (at present Zabaikalsky Krai) ( Gerstfeldt 1859) but later transferred to the genus Orientyla and synonymized with Orientyla mikhaljovae from the Ussuriysky Nature Reserve in Primorsky Krai and from the Khingan State Reserve in Amurskaya Oblast as a senior subjective synonym ( Mikhaljova & Golovatch 2001).

The study of the gonopods of the males of this species from the collection of FSCB using a scanning electron microscope has revealed some additional structural details ( Figs 28–31 ): colpocoxite apex is covered with small papillae and bears a groove along the perimeter; posterior angicoxal process and a half of the lateral sheath process (lp, Fig. 28 ) are covered with spinules; anterior gonopod telopodites (at, Fig. 30 ) and the edges of sheath groove (e, Fig. 30 ) protrude outward in some specimens.

Figures

FIGURES 28–31. Orientyla dahurica (Gerstfeldt, 1859), male. 28, gonopods, caudal view; 29, gonopods, front view; 30, distal parts of colpocoxites, front view; 31, apex of colpocoxite, front view; lp, lateral process of sheath groove; at, anterior gonopod telopodite; e, edge of sheath groove; pp, posterior angicoxal process; cx, coxosternum. Scales: 20 μm (Fig. 31), 100 μm (Fig. 29), 200 μm (Fig. 28), 0.5 mm (Fig. 30).