Julus alexandrae Evsyukov, 2016

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: 92

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-9315-FF99-FF0D-F6D3FE6A18AA

treatment provided by

Plazi

scientific name

Julus alexandrae Evsyukov, 2016
status

 

Julus alexandrae Evsyukov, 2016 

Figs 1A View Figure , 2A View Figure , 3A View Figure , 4A View Figure , 8A–B View Figure , 14A View Figure , 15A View Figure , 16A View Figure , 17A View Figure , Map 1

Julus alexandrae Evsyukov, 2016a: 243  (D).

Diagnosis. Differs from other species of the genus by the following combination of characters. Promere (pr) with a lamella (la) in middle part, rounded and apically gently angular ( Fig. 8A View Figure ). Distal part of opisthomere (op) with small lamellae ( Fig. 8B View Figure ). Metazonae with rough and deep striations ( Fig. 16A View Figure ). Ampullae of female vulvae (am1 and am2) subequal; female leg-pair 2 (l2) without coxal processes ( Fig. 17A View Figure ).

Descriptive notes. See Evsyukov (2016a) and Figs 1A View Figure , 2A View Figure , 3A View Figure , 4A View Figure , 8A–B View Figure , 14A View Figure , 15A View Figure , 16A View Figure , 17A View Figure .

Length of adults 17–19 mm, width 1.4–1.6 mm. Number of segments in adults from 48+1+T to 50+1+T. Body dark brown, more intensely pigmented dorsally, lighter on ventral side; legs brownish yellow; antennae and anal valves reddish brown. Eye patches composed of ca 45 ocelli. Metazonae with rough and deep striae ( Fig. 16A View Figure ).

Antennae long and slender, in situ reaching back to body segment 4. Antennomere 5 with a corolla of 8 bacilliform sensilla ( Fig. 1A View Figure ). Stipites of gnathochilarium with a paramedian pair of 3–4 setae per group parabasally, below mentum ( Fig. 2A View Figure ).

Male leg-pair 1 small, subtriangular ( Fig. 3A View Figure ), suture between coxa (cx) and a 1-segmented telopodite remnant (te) weakly expressed; cx without lateral process; te with several thin setae. Male leg-pair 2 with two coxal processes ( Fig. 4A View Figure ): anterolateral process (alp) short and slender; main process (mp) long, both the latter slightly diverging. Penes short, moderately bifurcated apically.

All three parts of each gonopod ( Fig. 8B View Figure ) forming a tight block. Promere (pr) higher than opisthomere (op), flagella (fl) well-developed, thick and somewhat ribbon-shaped; op with a basal, long, spike-like projection caudally and a thin, twisted and curved outgrowth (lo) laterally; pr without telopodite remnant, narrowed basally, with a lamella (la) laterally, rounded and gently angular apically ( Fig. 8A View Figure ). Mesomere (ms) simple, short, rounded at apex. Lateral outgrowth (lo) of op higher than both ms and remaining op ( Fig. 14A View Figure ).

Ventral edge of male segment 7 with small curved lamellae bordering the gonopodal aperture ( Fig. 15A View Figure ).

Female vulvae (vu) densely setose ( Fig. 17A View Figure ). Operculum (op) M-shaped in apical part, bursa (bu) rounded at upper edges, ampullae (am1 and am2) subequal. Female leg-pair 2 (l2) without coxal processes.

Remarks. The species was described, based on material from two localities in the Rostov-on-Don Region, southern Russia ( Evsyukov 2016a). This species is very similar to the European J. scanicus Lohmander, 1925  and J. terrestris Linnaeus, 1758  (cf. Schubart 1934), both in Julus  s. str. ( Lohmander 1936), and thus it clearly represents a European element in the fauna of northern Ciscaucasia.

The above shortened description and accompanying illustrations repeat information contained in Evsyukov (2016a), because no new material has been found since. Even though strictly speaking this is a European congener, its provenance from so close to the Caucasus proper warrants its incorporation into the present overview at least for comparative purposes.

Kingdom

Animalia

Phylum

Arthropoda

Class

Diplopoda

Order

Julida

Family

Julidae

Genus

Julus

Loc

Julus alexandrae Evsyukov, 2016

Evsyukov, Aleksandr, Golovatch, Sergei & Reip, Hans S. 2018

2018
Loc

Julus alexandrae

Evsyukov, 2016a : 243