Eviulisoma paradisiacum, Enghoff, 2018

Enghoff, Henrik, 2018, A mountain of millipedes VII: The genus Eviulisoma Silvestri, 1910, in the Udzungwa Mountains, Tanzania, and related species from other Eastern Arc Mountains. With notes on Eoseviulisoma Brolemann, 1920, and Suohelisoma Hoffman, 1963 (Diplopoda, Polydesmida, Paradoxosomatidae), European Journal of Taxonomy 445, pp. 1-90 : 45-47

Eviulisoma paradisiacum sp. nov.

urn:lsid:zoobank.org:act:EF53C636-FF60-4E60-93AB-911BAACD56E0

Figs 4 A –B , 5 , 7 A , 21

Diagnosis

Differs from other species of the E. kwabuniense group by having a strong hook emerging from the concave side of the solenophore and, together with the ventral lobe of the solenophore, delimiting a narrow slit.

Etymology

The name is an adjective referring to the name Frontier Tanzania gave to the montane forest plot where the species was found.

Material studied (total: 29 ♂♂)

Holotype

TANZANIA: ♂, Iringa Region, Iringa District, West Kilombero Scarp FR, 07°50′38.4″ S, 36°22′17.6″ E, montane woodland, 1400 m a.s.l., Plot Paradiso, 16 Nov. 2000, Frontier Tanzania leg. ( ZMUC) .

Paratypes

TANZANIA (all from Iringa Region, Iringa District, West Kilombero Scarp FR, Frontier Tanzania leg.): 8 ♂♂, same collection data as for holotype; 2 ♂♂, same collection data as for holotype, except montane forest, 1390 m a.s.l., 12 Nov. 2000; 18 ♂♂, same collection data as for holotype, except 1390–1410 m a.s.l., 18 Nov. 2000 (all in ZMUC) .

Description (male)

SIZE. Length 16 mm, max. width 1.7 mm.

COLOUR. After 17 years in alcohol whitish to pale yellowish, anterior part of dorsum very light brownish in some specimens.

ANTENNAE. Reaching back to end of ring 3.

BODY RINGS. Paranota completely absent. Stricture between pro- and metazonite clearly striolate ( Fig. 7 A ). A transverse row (1+ 1) of setae on all body rings.

HYPOPROCT. Large, trapezoid, with three marginal tubercles.

LEGS. Length 0.9 × body width. Relative lengths of podomeres: femur> prefemur> tarsus> postfemur = tibia. Scopulae ( Fig. 7 A ) on femur, postfemur, tibia and tarsus, diminishing towards posterior, especially on femur.

STERNUM 5. A bell-shaped process between legs 4.

STERNUM 6. Deeply excavated. Rim of excavation simple.

GONOPODS ( Fig. 21 ). Coxal lobe (cxl) moderately large. Prefemoral part (prf) ca ⅔ as long as acropodite. Mesal acropodital process (map) a long, straight, stout, pointed rod with a subapical lateral flange. Intermediate acropodital process (iap) a more slender, straight, non-spinose pointed rod, as long as map. Solenophore (sph) a massive sheet, almost as long as map, with a large, hook-shaped process (sph-h) on the hollow side, basal part of sph-h separated from small ventral, ʻsolenomere-conductingʼ lobe (sph-v) by narrow slit, dorso-lateral part of sph apically with a finger-shaped dorsal lobe (sph-d) separated by U-shaped incision from multi-cusped intermediate lobe (sph-i).

Distribution and habitat

Known only from the West Kilombero Scarp FR, Plot Paradiso. Altitudinal range: 1390–1410 m a.s.l. Habitat: montane forest. According to Frontier Tanzania (2001: 27, 174), ʻPlot Paradisoʼ is dominated by Millettia usaramensis Taub.

Figures

Fig. 4. Eviulisoma spp. A–B. E. paradisiacum sp. nov., ♂. A. Head and rings 1–8, lateral view. B. Head and collum, frontal view. C. E. Zebra sp. nov., ♂, head and rings 1–3, lateral view. Abbreviation: pn = paranotum. Scale bars: 0.2 mm.

Fig. 5. Eviulisoma paradisiacum sp. nov., ♂. A. Two midbody rings, lateral view, showing pleurosternal keel and striolate stricture. B. Two midbody rings, ventral view, showing sternal cones. C–E. Telson. C. Ventral view. D. Dorsal view. E. Posterior view. Abbreviations: ep = epiproct; hy = hypoproct; lt = lateral tubercle; oZ = ozopore; pk = pleural keel; pp = paraproct; sc = sternal cone; sp = spinneret; str = stricture; tt = terminal tubercle. Scale bars: 0.1 mm.

Fig. 7. Eviulisoma spp., scopulae on postfemur (pof), femur (fe), tibia (ti) and tarsus (ta) of male legs. A. E. paradisiacum sp. nov., paratype. B, D. E. cetafi sp. nov., paratype. C. E. ejti sp. nov., paratype. E–F. E. coxale sp. nov., paratype from Mito Mitatu. Scale bars: A, C, E = 0.05 mm; B, F = 0.01 mm; D = 0.1 mm.

Fig. 21. Eviulisoma paradisiacum sp. nov. A–D. Paratype, left gonopod, solenomere dislodged from solenophore. A. Lateral view. B. Ventral view. C. Mesal view. D. Dorsal view. E. Another paratype, gonopod acropodite, apical (anterior) view, solenomere sticking out from solenophore slit. Abbreviations: cxl = coxal lobe; iap = intermediate acropodital process; map = mesal acropodital process; prf = prefemoral part; slm = solenomere; sph-d, sph-i, sph-v = dorsal, intermediate and ventral lobes of solenophore; sph-h = solenophore hook. Scale bars: A–C = 0.1 mm; D–E = 0.05 mm.