Julus khostensis

Evsyukov, Aleksandr, Golovatch, Sergei & Reip, Hans S., 2018, The millipede genus Julus Linnaeus, 1758 in the Caucasus (Diplopoda: Julida: Julidae), Zootaxa 4461 (1), pp. 89-117: 112-114

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Julus khostensis

sp. n.

Julus khostensis  sp. n.

Figs 1H View Figure , 2I View Figure , 3T View Figure , 7D View Figure , 13D–E View Figure , 15H View Figure , 16I View Figure , Map 2

Material examined. Holotype male (ZMUM), Russia, Krasnodar Prov., Khosta, Taxus  and Buxus  grove, Cave Tisovaya I, 27.IX.1985, leg. N. Myuge.

Diagnosis. The promere is similar to that in J. kubanus  , but the processes on male leg-pair 2 resemble those of J. lindholmi  and J. jedryczkowskii  . Differs clearly from all congeners by the structure of the flagellum on the promere and the conformation of the opisthomere. Coxa (cx) of male leg-pair 1 with a large lateral outgrowth ( Fig. 3T View Figure ). Male leg-pair 2 ( Fig. 7D View Figure ) with two pairs of coxal processes. Gonopodal promere (pr) narrow, with a thin lamella (la) ( Fig. 13D View Figure ). Each flagellum (fl) with a lamina in apical part. Mesomere (ms) rounded, opisthomere (op) bifurcate ( Fig. 13E View Figure ). Striations on metazonae regular and parallel to one another ( Fig. 16I View Figure ).

Derivatio nominis. To emphasize Khosta, Greater Sochi, a city near the terra typica; adjective.

Description. Length 29 mm, width 1.8 mm. Body segment formula 45+1+T. Body marbled greyish, venter lighter; antennae and anal valves greyish brown; legs yellow; eyes black.

MAP 2. Distribution of Julus  species: J. kubanus Verhoeff, 1921  (green circle), J. subalpinus Lohmander, 1936  (red square), J. dagestanus  sp. n. (blue triangle), J. khostensis  sp. n. (purple star).

Eye patches subtriangular, each composed of ca 40 ocelli. Epicranial setae 1+1, supralabral setae 2+2, labral setae 10+10. Genae unmodified. Antennae short and slender, in situ reaching back to body segment 3. Antennomeres 5 and 6 each with a distal corolla of sensory bacilliform sensilla ( Fig. 1H View Figure ).

Lamellae linguales bare (artifact or abnormality?). A paramedian pair of pronounced swellings with a row of ca 12 setae per swelling parabasally, below mentum ( Fig. 2I View Figure ).

Body subcylindrical and slender. Suture dividing pro- and metazonae distinctly constricting both. Prozonae smooth, without striae. Metazonae with striations reaching the hind margin, ca 10 striae per about dorsal quarter of metazonital surface, i.e. between axial line and ozopore. Striae on metazonae regular and parallel to one another ( Fig. 16I View Figure ). A whorl of sparse, thin, short setae at hind edge of metazonae, setae gradually growing denser and somewhat longer towards telson. Telson with sparse long setae on epiproct, the latter carrying a small apical clawshaped projection directed caudad. Anal valves convex, densely setose.

MALE. Pregonopodal legs more incrassate than postgonopodal ones. Segments 6 and 7 wider than others. Ventral edge of segment 7 with small curved lamellae bordering the gonopodal aperture ( Fig. 15H View Figure ). Suture between coxa (cx) and a 1-segmented telopodite remnant (te) well-developed; cx with a large lateral outgrowth; te with a group of thin setae ( Fig. 3T View Figure ). Leg-pair 2 ( Fig. 7D View Figure ) with two pairs of coxal processes. Anterolateral process (alp) relatively long and slender. Main one (mp) short and slender.

All three parts of each gonopod ( Fig. 13E View Figure ) forming a tight block. Promere (pr) longer than opisthomere (op), flagella (fl) well-developed; fl with a lamina in apical part; pr narrow, with a thin lamella (la) ( Fig. 13D View Figure ); mesomere (ms) rounded; op and lateral outgrowth (lo) pointed at apex ( Fig. 13E View Figure ).

FEMALE. Unknown.