Julus dagestanus

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: 109-112

publication ID

https://doi.org/10.11646/zootaxa.4461.1.7

publication LSID

lsid:zoobank.org:pub:3FACE488-20DC-46A4-A511-026B7F2DBEA2

persistent identifier

http://treatment.plazi.org/id/610E87FB-9302-FF8D-FF0D-F061FE881B85

treatment provided by

Plazi

scientific name

Julus dagestanus
status

sp. n.

Julus dagestanus  sp. n.

Figs 1G View Figure , 2H View Figure , 3S View Figure , 7C View Figure , 13A–C View Figure , 14H View Figure , 16H View Figure , 18D View Figure , Map 2

Material examined. Holotype male (ZMUM), Russia, Dagestan, Kazbek Distr., Dylym, Fagus  and Carpinus  forest, 19.VII.1986, leg. Khadjialiev. Paratypes: 1 fragmented male, 8 females (ZMUM), same data as holotype; 1

male ( ZMUMAbout ZMUM), same data as holotype (a slide with antennae, gnathochilarium, male leg-pairs 1 and 2, and gonopods). 

Diagnosis. Based on the gonopodal conformation, this new species seems to be especially similar to J. jedryczkowskii  and J. lindholmi  , but it differs from all cogeners primarily by the structure of the promere and the shape of the lateral outgrowth on the opisthomere. Each flagellum (fl) of gonopodal promere with a spike-like outgrowth and a small lamina in distal part ( Fig. 13A View Figure ). Promere (pr) wide, with two narrow lamellae, one apical (la1) and the other basal (la2) ( Fig. 13B View Figure ). Mesomere (ms) bifurcate at apex; op rounded at apex; op with pointed lateral outgrowth (lo) ( Figs 13C View Figure , 14H View Figure ). Striations on metazonae regular, shallow and smooth ( Fig. 16H View Figure ). Ampullae of female vulvae different in shape: ampulla 1 (am1) elongated, ampulla 2 (am2) rounded. Coxal process of legpair 2 (l2) in female narrow and rounded ( Fig. 18D View Figure ).

Derivation nominis. To emphasize Dagestan, the terra typica; adjective.

Description. Length 38–45 mm, width 1.7–2.3 mm (females), or length 38 mm, width 1.5 mm (male). Body segment formula: 50+2+T (male); 50+1+T, 44+1+T, 47+1+T, 49+1+T, 48+1+T (females). Body dark brown, lighter on ventral side; antennae and anal valves greyish brown; legs brownish yellow; eyes black.

Eye patches subtriangular, each composed of ca 40 ocelli. Epicranial setae 1+1, supralabral setae 2+2, labral setae 8+8. Genae unmodified. Antennae slender, in situ reaching back to segment 4. Antennomeres 5 and 6 each with a distal corolla of sensory bacilliform sensilla ( Fig. 1G View Figure ).

Each lamella lingualis with two long frontal and ca 10 central setae. A paramedian pair of pronounced bolsters with a group of ca 15 setae per group parabasally, below mentum ( Fig. 2H View Figure ).

Body subcylindrical and slender. Male segments 6 and 7 stouter than others. Ventral edge of male segment 7 with small curved lamellae bordering the gonopodal aperture. Suture dividing pro- and metazona distinctly constricting both. Ozopores small, lying behind suture, not touching it. Prozonae smooth, without striae. Metazonae with striations reaching the hind margin, ca 20 striae per approximate dorsal quarter of metazonital surface, i.e. between dorsal axial line and ozopore. Striations on metazonae regular, shallow and smooth ( Fig. 16H 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 with a small, apical, claw-shaped projection directed caudad. Anal valves convex, densely setose.

MALE. Pregonopodal legs more incrassate than postgonopodal ones. Segments 6 and 7 stouter than others. Ventral edge of segment 7 with small curved lamellae bordering the gonopodal aperture. Leg-pair 1 ( Fig. 3S View Figure ) subtriangular. Suture between coxa (cx) and a 1-segmented telopodite remnant (te) weakly expressed; te with a group of thin setae. Leg-pair 2 ( Fig. 7C View Figure ) with two pairs of coxal processes. Anterolateral process (alp) relatively long and slender. Main process (mp) long and straight.

All three parts of each gonopod ( Fig. 13C View Figure ) forming a tight block. Promere (pr) higher than opisthomere (op), flagella (fl) well-developed ( Fig. 13A View Figure ); pr wide, with an apical lamella (la1) and a basal (la2) narrow one ( Fig. 13B View Figure ); fl with a spike-like outgrowth and a small lamina in distal part ( Fig. 13A View Figure ). Mesomere (ms) bifurcate at apex; op rounded at apex; op with pointed lateral outgrowth (lo) ( Figs 13C View Figure , 14H View Figure ).

FEMALE. Suture between pro- and metazonae well-developed. Prozonae without striae, metazonae densely striate. Ocelli ca 40 per eye patch. Epicranial setae 1+1, supralabral setae 2+2, labral setae 8+8. First two leg-pairs incrassate.

Vulva (vu) wide, operculum (op) M-shaped, bursa (bu) with pointed lateral processes. Ampullae relatively large; ampulla 1 (am1) elongated, ampulla 2 (am2) rounded. Coxal process of leg-pair 2 (l2) rounded at apex, with one seta ( Fig. 18D View Figure ).

ZMUM

Zoological Museum, University of Amoy

Kingdom

Animalia

Phylum

Arthropoda

Class

Diplopoda

Order

Julida

Family

Julidae

Genus

Julus