Litovkia anisimovka, Mikhaljova, 2021

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 : 19

Litovkia anisimovka sp. nov.

Figs 17–27

Material examined. Holotype: male ( FSCB), Russia, Primorsky krai, Shkotovsky District, 8 km SSE of Anisimovka village, Sikhote-Alin mountain system, Mt. Litovka , ca 300 m a.s.l., mixed forest, 15.X.2006, leg. A. A. Rodionov . Paratypes: 1 male ( ZMUM) , 1 male, 1 female ( FSCB), same locality as in holotype, 15.X.2006, leg. A. A. Rodionov .

Diagnosis. Differs from its only congener mainly by the posterior angiocoxal process as a two-lobed protrusion (in contrast to its being laminate, curved in semicircle in L. lysaya comb. nov.), as well as the more robust, more deeply bifurcated anterior angiocoxal process and larger body size: 15–16 mm (in contrast to about 12 mm in L. lysaya comb. nov.).

Description. Male. Length 15–16 mm, width about 2.5 mm with paraterga. Coloration in alcohol beige (discoloration in alcohol is possible). Distal parts of anterior legs brownish. Antennae light brown. Eye patches black, with about 30 ocelli.

Body with 32 rings. Collum semicircular. Both collum and ring 2 narrower than head with genae. Ring 2 somewhat wider than collum. Paraterga beginning on ring 2(3), well developed on rings 5–27, reduced on rings 28, onward missing. Metazonital macrochaetae in a transverse row on somites 30–31, like an extended triangle on preceding somites. Caudolateral macrochaetae longest, anterolateral and medial ones subequal in length. All macrochaetae pointed. Axial suture relatively well-developed.

Legs long and slender. Leg pairs 1 and 2 typically reduced in size, with usual tarsal brushes. Other pregonopodal legs somewhat enlarged. Leg pairs 3–7 with a group of funnel–shaped tarsal papillae apically near claw ( Fig. 17 ). Claw of leg pairs 3–7 at base with a setoid outgrowth ventrally but without additional claws dorsally. Legs 4 with femora clavate, depressed glabrous area, framed by eyelashlike group of setae (a, Fig. 18 ). Leg pairs 5–7 slightly larger than 4, femora somewhat swollen and curved, lacking modifications present on leg 4. Leg pairs 10 and 11 with a small group of tarsal papillae apically near claw but without touching it. Other postgonopodal legs without tarsal papillae. Claw of legs 10 and 11 at base with a long setoid outgrowth ventrally and two small additional claws dorsally. Claw of midbody legs at base with two small additional claws dorsally and a long setoid outgrowth ventrally. Claw of hindmost legs at base with a long setoid outgrowth ventrally only.

Legs 10 and 11 with coxal glands ( Fig. 19 ). Coxae 10 and 11 without modifications. Trochanter 11 with a caudoventral setose finger-shaped process rounded apically ( Fig. 20 ). Trochanter 10 with a barely noticeable setose knobble.

Gonopods as in figs 21–25. Anterior gonopod telopodites flagelliform (at, Fig. 21 ), their distal parts positioned inside narrow sheath groove on the posterior gonopod colpocoxites with elevated edges. Distal part of each anterior gonopod telopodite with a longitudinal groove filled with transverse ridges-filaments (r, Fig. 22 ). Posterior gonopod colpocoxites fused medially almost to midway, their apices hook-shaped, curved caudally. Colpocoxite with a small mesal process-like plate; two plates are almost adjacent to each other. Each colpocoxite entire. Posterior gonopod angiocoxite with subglobule in posterior view. Posterior angiocoxal processes as a two-lobed protrusion (pp, Fig. 21 ). Anterior angiocoxal processes very large, distally deeply bifid (ap, Figs 22 , 24 ), passing through lateral foramina in colpocoxites. Posterior gonopod telopodites 2-segmented, setose, prefemur with a thin stem, femur of medium length, elongate.

Female. Length 15–17 mm, width with paraterga 2.5 mm. Body with 32 rings. Other somatic characters as in a male. Vulvae small, near ovoid, setose ( Figs 26–27 ).

Etymology. The specific epithet refers to the locus typicus, Anisimovka village, a noun in apposition.

Figures

FIGURES 17–22. Litovkia anisimovka sp. nov., male paratype. 17, distal part of leg 4; 18, leg 4 without coxa and trochanter; 19, leg pair 11, caudal view; 20, coxae and trochanters 11, caudal view; 21, gonopods, caudal view, telopodites of posterior gonopods broken; 22, distal part of gonopods, caudal view; r, ridges-filaments; pp, posterior angicoxal process; ap, bifid anterior angiocoxal process; at, anterior gonopod telopodite; a, glabrous area. Scales: 20 μm (Figs 17, 22), 100 μm (Figs 18–21).

FIGURES 23–25. Litovkia anisimovka sp. nov., male paratype. 23, posterior angiocoxal process; 24, gonopods, front view, telopodites of posterior gonopods broken; 25, distal part of gonopod, front view; ap, anterior angiocoxal process. Scales: 20 μm (Figs 23, 25), 100 μm (Fig. 24).

FIGURES 26–27. Litovkia anisimovka sp. nov., female paratype. 26, vulva, ventral view; 27, vulva, lateral view. Scales: 20 μm.