Altajosoma bukhtarma Mikhaljova

Mikhaljova, Elena V., Burkitbaeva, Ulzhan D., Tuf, Ivan H. & Ulykpan, Kaman, 2013, The millipede order Chordeumatida (Diplopoda) in Kazakhstan, with descriptions of three new species, Zootaxa 3635 (5), pp. 533-544 : 537-538

Altajosoma bukhtarma Mikhaljova sp. nov.

Figs 5–9

Material examined. Holotype: 1 male (IBSS), Kazakhstan, Vostochno Kazakhstanskaya Area, Katon-Karagaiskii District, 1390 m, 49°08´499´´ N, 085°57´670´´ E, Larix forest, 22 August 2010, leg. K. Ulykpan. Paratypes: 1 male (PU), 1 male (IBSS), together with holotype, 22 August 2010, leg. K. Ulykpan.

Diagnosis. Differs from congeners mainly by the large, straight, lateral sheath processes of the posterior gonopod colpocoxites, coupled with large posterior angiocoxal processes and small mesal sheath processes of the colpocoxite fused mesally into a single cyathiform structure.

Description. Male. Length 11–12 mm, width with paraterga 0.9–1.0 mm. Coloration in alcohol brown. Legs brown with marbled distal parts. Ocellaria black. Antennae brown. Protruding telopodites of posterior gonopods dark brown. Forehead with light spot.

Body with 32 segments. Head covered with short and relatively long setae. Eye patches subtriangular, each composed of at least 25 ocelli. Collum semi-circular. Body width gradually increasing until somite 7, body parallelsided on somites 8–24(25), thereafter gradually tapering.

Paraterga beginning on somite 2, well developed on somites 3–26, reduced on somite 27, onward missing. Paraterga of pregonopodal somites smaller. Metazonital macrochaetae in a transverse row on somites 30–31, like an elongate (to different degrees) triangle on preceding somites. Numerous macrochaetae broken off, remaining ones long, pointed apically; anterolateral macrochaetae shortest, caudolateral ones longest.

Legs long and slender. Leg pairs 3–7 somewhat enlarged, femora swollen. Legs (including leg pairs 10 and 11) with a small group of funnel-shaped tarsal papillae apically near claw, however tarsal papillae gradually missing toward middle part of body. Claws of pregonopodal legs at base with long setoid filament ventrally but without well-developed additional claws dorsally. Claws of postgonopodal legs (including leg pairs 10 and 11) at base with two small additional claws dorsally and long setoid filament ventrally, but small additional claws gradually missing toward middle part of body.

Legs 10 and 11 with coxal glands but without other modifications.

Anterior gonopod telopodite 1-segmented, flagelliform (Fis. 5, 7, 8). Telopodite base and distal part of coxosternum attached to adjacent mesal portion of posterior gonopod. Posterior gonopod colpocoxites fused to 2/3 extent, arcuate, curved caudad. Colpocoxite distal part narrowed, apex hook-shaped. Lateral sheath process of colpocoxite (lp) straight with prominence in its middle part, pointed apically. Mesal sheath processes of colpocoxite not large, fused mesally into single cyathiform structure (ms). Angiocoxite with a globule in posterior view. Posterior angiocoxal process (pp) large, curved forward with beak-shaped pointed lateral margin and teeth apically. Angiocoxites with depressions and ridges in anterior view, each supplied with small process (ap) ( Fig. 6 , 9 ).

Female unknown.

Name. The specific epithet refers to the type locality ( Bukhtarma is the name of the river, which flows near the type locality), a noun in apposition.

Figures

FIGURES 5 – 7. Altajosoma bukhtarma sp. nov., male paratype. 5, gonopods, caudal view; 6, gonopods, front view; 7, basal parts of telopodites of anterior gonopods; lp, lateral sheath process of posterior gonopod colpocoxite; pp, posterior process of posterior gonopod angiocoxite; ms, mesal sheath processes of posterior gonopod colpocoxites; ap, anterior process of posterior gonopod angiocoxite.

FIGURES 8 – 9. Altajosoma bukhtarma sp. nov., male paratype. 8, gonopods, caudal view; 9, gonopods, front view; lp, lateral sheath process of posterior gonopod colpocoxite; pp, posterior process of posterior gonopod angiocoxite; ap, anterior process of posterior gonopod angiocoxite; ms, mesal sheath processes of posterior gonopod colpocoxites. Scale in mm.