Syrioiulus adsharicus (Lohmander, 1936)

Evsyukov, Aleksandr P., Golovatch, Sergei I. & Antic, Dragan Z., 2021, The millipede genera Amblyiulus Silvestri, 1896 and Syrioiulus Verhoeff, 1914 in the Caucasus, with notes on their distributions (Diplopoda, Julida, Julidae), ZooKeys 1048, pp. 109-143 : 109

publication ID	https://dx.doi.org/10.3897/zookeys.1048.68454
publication LSID	lsid:zoobank.org:pub:FC201D04-9877-4583-92C2-84CC80BB75A5
persistent identifier	https://treatment.plazi.org/id/FD1AF8FA-CF67-5EFE-91C4-A30BE3A2CF21
treatment provided by	ZooKeys by Pensoft
scientific name	Syrioiulus adsharicus (Lohmander, 1936)
status

Treatment

Figs 1C View Figure 1 , 6 View Figure 6 , 7 View Figure 7 , 15C View Figure 15 , 16 View Figure 16

Amblyiulus (Heteropachyiulus) adsharicus Lohmander, 1936: 156-159, figs 131, 132 (D).

Amblyiulus adsharicus - Kobakhidze 1964: 191 (M); Lokšina and Golovatch 1979: 385 (M); Talikadze 1984: 143 (M); Kokhia and Golovatch 2018: 40 (M).

Syrioiulus adsharicus - Vagalinski 2020: 89 (M); Kokhia and Golovatch 2020: 207 (M).

Material examined.

Georgia: 10 ♂♂, 16 ♀♀, 5 juv. (ZMUM), 15 km W of Adigeni , Abies , Picea , Fagus , Acer , etc. forest, 1500-1700 m a.s.l., litter, logs, under stones, 14-15.V.1983, leg. S. Golovatch ; 4 ♂♂, 5 ♀♀ (ZMUM), near Adigeni , 9.VI.1977, leg. V. Dolin.

Diagnosis.

Differs from all congeners by the following combination of somatic and gonopodal characters. Head with frontal setae. Collum and each metazona of following body rings with a whorl of long setae at caudal margin. Ommatidia present, but only a few ommatidia, all unpigmented and very small. Solenomere with small denticles apically. Anterior process of opisthomere with small filament-like spines apically.

Redescription.

Length of adults 17-30 mm (♂♂) or 18-31 mm (♀♀), width 1.2-1.4 mm (♂♂) or 1.3-1.7 mm (♀♀). Number of body rings in adults, 50-63+1-2+T (♂♂) or 52-60+1-2+T (♀♀). Body subcylindrical (typical of Julidae ), metazonae brownish grey, prozonae violet grey (Figs 1C View Figure 1 , 6A, C View Figure 6 ). Head, collum and body rings from yellow to greyish yellow. Antennae, mouthparts and first leg pairs yellow, other pairs brown (Fig. 6A, C-H View Figure 6 ). Eyes present, unpigmented, very small, composed of 3-7 ommatidia, unequal numbers on opposite sides of head (Fig. 6B View Figure 6 ). Metazonae with weak striations, 17-19 striae per quarter of metazonital surface, i.e., that between dorsal axial line and ozopore (Fig. 6E View Figure 6 ). Ozopores small, lying behind suture and touching it (Fig. 6I View Figure 6 ).

Antennae relatively long, in situ reaching segment 4. Head with 1+1 frontal, 11+11-13+13 labral and 2+2 supralabral setae (Fig. 6C, D View Figure 6 ). Gnathochilarium with four long setae on each lamella lingualis, stipites with a medial group of 7-10 short setae, three long and two short setae at anterolateral margin (Fig. 6J View Figure 6 ). Collum and each metazona of following rings with a whorl of long setae at posterior margin (Fig. 6A, E, F-H View Figure 6 ). Epiproct undeveloped (Fig. 6F, G View Figure 6 ). Hypoproct subtriangular, with long setae (Fig. 6H View Figure 6 ). Anal valves densely setose, setae being long.

Male. Mandibular stipites expanded, slightly swollen (Fig. 6A View Figure 6 ). Leg pair 1 small, unciform, telopodites curved anteromesad (as in most other Julidae ), with a group of setae on each coxa and at base of telopodite (Fig. 6K View Figure 6 ). Leg pair 2 with pads on postfemur and tibia (Fig. 6L View Figure 6 ). Penes short, bifurcate. Ventral edge of male pleurotergum 7 with relatively wide and apically rounded lamellae bordering the gonopodal aperture (Fig. 6M View Figure 6 ).

Gonopods (Fig. 7 View Figure 7 ) with anterior and posterior pair equal in height. Promere spoon-shaped, constricted in basal third; a mesal ridge along basal 2/3 extent; two apical denticles well-developed, mesal one vertical and with a weakly bifurcate apex, lateral one short, wide and rounded apically (Fig. 7B, E View Figure 7 ). Mesomeral process simple, flattened, ribbon-shaped, bifurcate (Fig. 7C, F View Figure 7 ). Opisthomere bipartite (Fig. 7D, C View Figure 7 ). Solenomere long, erect, with small denticles apically, bearing a fovea at apex; caudomesal lamella wide with a notched apical margin (Fig. 7A, C, F View Figure 7 ). Anterior process apically with small filament-shaped spines (Fig. 7D View Figure 7 ).

Female. First two leg pairs unmodified. Vulva elongated, covered with long setae (Fig. 15C View Figure 15 ). Operculum relatively low, deeply divided. Bursa asymmetric, lateral valve higher than mesal one. Median field of bursa narrow; emargination of median field narrow and elongated.

Remark.

This species was originally described from Batumi, “Bortschacha” ( Lohmander 1936). Our new record from near Adigeni is evidence of the species likely to be endemic to the southern part of the Colchidan biogeographic province, all within Georgia (Fig. 16 View Figure 16 ).