Eviulisoma ngaiaorum, VandenSpiegel, Didier & Golovatch, Sergei I., 2014

VandenSpiegel, Didier & Golovatch, Sergei I., 2014, The millipede genus Eviulisoma Silvestri, 1910 in Kenya, with descriptions of new species (Diplopoda, Polydesmida, Paradoxosomatidae), ZooKeys 459, pp. 11-34 : 13-14

Taxon classification Animalia Polydesmida Paradoxosomatidae

Eviulisoma ngaiaorum sp. n. Fig. 2, Map 1

Type material.

Holotype ♂ (MRAC 20806), Kenya, Ngaia Forest, N00°19', E38°02', ca 1070 m a.s.l., 3.XII.2002, leg. D. VandenSpiegel.

Paratypes: 1 ♂ fragment, 1 ♂ subadult, 8 juv. (MRAC 20806), same data, together with holotype.

Name.

To emphasize the type locality, in Latin meaning "a dweller of Ngaia".

Diagnosis.

Differs from all congeners but Eviulisoma ngaia sp. n. in the absence of a sternal excavation in ♂ body segment 6, from Eviulisoma ngaia sp. n. in the presence of sternal cones in the ♂ and only a vestigial gonopod postfemoral process (Fig. 2 C–E). See also Key below.

Description.

Length of adults ca 20 mm (♂ holotype), width of midbody metazonae 2.2 mm (both ♂ holotype and ♂ fragment paratype). Juveniles entirely pallid.

Coloration and other adult characters as in Eviulisoma ngaia sp. n., except as follows.

Transverse metatergal sulcus/line wanting. Tergal setae mostly retained, pattern 3+3 (Fig. 2B). Pleurosternal carinae rather evident, arcuate ridges devoid of a caudal tooth, visible until segment 15 (♂). Epiproct (Fig. 2B) subtruncate apically, subapical lateral papillae rather large and only poorly removed from tip.

Sternites behind gonopods with a distinct sharp cone near each ♂ coxa, each caudal pair per diplosegment being a little stronger than anterior one. Setose lobe between ♂ coxae 4 (Fig. 2C) faintly concave at tip. Sterna between ♂ coxae 6 and 7 (Fig. 2C) clearly flattened, their coxae being a little enlarged and conical distoventrally. Legs densely setose, rather short, 1.2-1.3 times as long as body height (♂), tibiae behind gonopods thereby being mostly subequal in length to tarsi; ♂ tibiae and tarsi with ventral brushes until last two leg-pairs.

Gonopods (Fig. 2 C–E) with a lamellar, lateroparabasally strongly expanded solenophore (sph) carrying a large apical claw and two pre-apical teeth, one mesal (m), the other lateral (l); a flagelliform solenomere (sl) about as long as to reach bases of both l and m; postfemoral process (p) very short, fold-shaped, vestigial.