Eviulisoma chitense, 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 : 30-32

Eviulisoma chitense sp. nov.

urn:lsid:zoobank.org:act:13931F2B-13C9-4987- A 3AA-B9F42BB5796D

Figs 6D , 14

Diagnosis

Differs from other species of the E. kwabuniense group by the combination of a map with a short subapical laterad side branch, a partly spinose iap, and a clearly three-lobed solenophore that is much shorter than map and iap, dorsal lobe of solenophore much longer than the others.

Etymology

The name is an adjective referring to the type locality.

Material studied (total: 5 ♂♂)

Holotype

TANZANIA: ♂, Iringa Region, Udzungwa Scarp FR, above Chita Village , 1400 m a.s.l., 4–5 Nov. 1984, pitfall traps in montane rain forest, N. Scharff leg. ( ZMUC).

Paratypes

TANZANIA: 4 ♂♂, same locality as for holotype but 1050 m a.s.l., 26–29 Oct. 1984, pitfall traps in intermediate rain forest, N. Scharff leg. ( ZMUC).

Description (male)

SIZE. Length 20 mm, max. width 1.6–1.9 mm.

COLOUR. After 33 years in alcohol whitish to very light brown, a little darker dorsally.

ANTENNAE. Reaching back to middle of ring 4.

BODY RINGS. Paranota indicated by very faint ridges on body ring 2 (as Fig. 4C ), otherwise completely absent. Stricture between pro- and metazonite smooth. A transverse row of setae on all body rings.

HYPOPROCT. Trapezoid, almost rectangular with three large apical tubercles.

LEGS. Length 1.1× body width. Relative lengths of podomeres: femur> prefemur> tarsus> tibia> postfemur. Scopulae on femur, postfemur, tibia and tarsus until midbody, gradually disappearing on more posterior legs.

STERNUM 5. A small subrectangular lobe between legs 4 ( Fig. 6D ).

STERNUM 6. Deeply excavated. Rim of excavation simple.

GONOPODS ( Fig. 14 ). Coxal lobe (cxl) distally right-angled. Prefemoral part (prf) ca half as long as acropodite. Mesal acropodital process (map) a straight, smooth rod with a subapical curved side branch. Intermediate acropodital process (iap) a curved pointed rod, covered in long spines along mesal side. Solenophore (sph) much shorter than acropodital processes, curving around solenomere (slm), apically with three slender lobes /processes, dorsal lobe (sph-d) longer, intermediate process (sph-i) thinner than the others.

Distribution and habitat

Known only from the Udzungwa Scarp FR, above Chita Village. Altitudinal range 1050–1400 m a.s.l. Habitat: intermediate and montane rain forest. Collected together with E. cetafi sp. nov.

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. 6. Eviulisoma spp., male sternum 5 with lobe between 4th legs and sternum 6 with excavation. A–B. E. ejti sp. nov., paratype, sternum 5 and 6. A. Ventral view. B. Sub-posterior view. C. E. acaciae sp. nov., paratype, sternum 6, ventral view. D–F. Sternum 5 lobe, posterior view. D. E. chitense sp. nov., paratype. E. E. dabagaense Kraus, 1958, specimen from Udzungwa Scarp FR, above Chita Village. F. E. coxale sp. nov., specimen from Mito Mitatu. Abbreviation: am = amorphous mass. Scale bars: A–C = 0.2 mm; D = 0.05 mm; E–F = 0.1 mm.

Fig. 14. Eviulisoma chitense sp. nov. paratype. A, C–F. Left gonopod. A. Lateral view. C. Mesal view. D. Ventral view. E. Dorsal view. F. Isolated solenophore, lateral view. B. Lobe between legs 4. 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. Scale bars: A–E= 0.1 mm; F = 0.05 mm.