Eviulisoma angulatum, 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 : 70

Eviulisoma angulatum sp. nov.

urn:lsid:zoobank.org:act:B9772330-5C4A-4CFC-A5 A 0- A 8 A 4DE67AC65

Fig. 34

Diagnosis

Differs from all other Eviulisoma species by the angular rim of the sternum 6 excavation and by the opposing hooks of the mesal acropodital process (map) and the solenophore (sph).

Etymology

The specific epithet is an adjective referring to the angular shape of the rim of the excavation of the male sternum 6.

Material studied (total: 7 ♂♂)

Holotype

TANZANIA: ♂, Morogoro Region, Udzungwa Mts National Park, Kidatu, Plot 5 , 07°40′45.5″ S, 36°55′06.9″ E, 1448 m a.s.l., 21 Oct. 2014, pitfall trapping, J. Malumbres-Olarte leg. ( ZMUC).

Paratypes

TANZANIA: 6 ♂♂, same collection data as for holotype (ZMUC).

Description (male)

SIZE. Length 14 mm, max. width 1.3 mm.

COLOUR. Overall colour after 3 years in alcohol medium brown, lighter ventrally. Clypeolabral region, mandibular bases, antennae and legs pale yellowish.

ANTENNAE. Reaching back to middle of ring 3.

BODY RINGS. Paranota completely absent. Stricture between pro- and metazonite indistinctly striolate. No setae on postcollar body rings.

HYPOPROCT. Triangular, tubercles indistinct.

LEGS ( Fig. 34G ). Stout, length = body width. Relative lengths of podomeres: femur> prefemur> tarsus> postfemur = tibia. Scopulae on femur, postfemur, tibia and tarsus on anterior legs, only on tibia and tarsus on posterior legs.

STERNUM 5. A high, narrow, rectangular hairy process between legs 4.

STERNUM 6 ( Fig. 34F ). Deeply excavated. Rim of excavation laterally forming prominent rectangular ‘corners’.

GONOPODS ( Fig. 34 A –E ). Coxal lobe (cxl) moderate. Prefemoral part (prf) almost half as long as acropodite. Mesal acropodital process (map) stout, slightly arched, subapically with irregular ridges on mesal surface, ending in pointed tip; a large subapical irregular, dorsad hook (hmap), with a small pointed side branch. Solenophore (sph) as long as map, stout, arched, ending in pointed tip similar to that of map; a large subapical ventrad hook (hsph) lying parallel to hook (hmap) of mesal acropodital process.

Distribution and habitat

Known only from the Udzungwa Mts National Park, Kidatu, 1448 m a.s.l.

Figures

Fig. 34. Eviulisoma angulatum sp. nov., paratype. A–E. Left gonopod. A. Mesal view. B. Lateral view. C. Ventral view. D. Tips of mesal acropodital process and solenophore, mesal view. E. As D, latero-dorsal view, also showing solenomere. F. Excavation of sternum 6. G. Leg from ring 6. Abbreviations: cxl = coxal lobe; hmap = hook-shaped process of map; hsph = hook-shaped process of sph; prf = prefemoral part; slm = solenomere; sph = solenophore. Scale bars: A–C, F = 0.1 mm; D–E, G = 0.05 mm.