Eviulisoma sternale, 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: 57-59

publication ID

https://doi.org/10.5852/ejt.2018.445

publication LSID

lsid:zoobank.org:pub:852A3F68-B728-413A-B12E-56F306D56C35

DOI

http://doi.org/10.5281/zenodo.5681614

persistent identifier

http://treatment.plazi.org/id/C1C01D8B-4082-4DF2-83F0-FB8F444CF9F7

taxon LSID

lsid:zoobank.org:act:C1C01D8B-4082-4DF2-83F0-FB8F444CF9F7

treatment provided by

Plazi

scientific name

Eviulisoma sternale
status

sp. nov.

Eviulisoma sternale   sp. nov.

urn:lsid:zoobank.org:act:C1C01D8B-4082-4DF2-83F0-FB8F444CF9F7

Figs 26–27 View Fig. 26 View Fig. 27

Diagnosis

Differs from other species of the E. sternale   group by its smaller size (width 2.0 mm, vs 3.0– 3.2 mm in other species) and by having an apical dentate ridge on map.

Etymology

The name is an adjective referring to the modified 6th male sternum.

Material studied (total: 1 ♂)

Holotype

TANZANIA: ♂, Iringa Region, Udzungwa Mts, West Kilombero Scarp FR, Ndundulu Forest 07°46′ S, 36°29′ E, Waller’s camp , tropical semi-evergreen forest, 1550 m a.s.l., 1–12 Jan. 2007, L.A. Hansen and local assistants leg. ( ZMUC) GoogleMaps   .

Referred non-type material

TANZANIA: 2 ♀♀, same collection data as for holotype (ZMUC)   ; 1 ♀, 3 juv., same collection data as for holotype, but Dec. 2006 (ZMUC)   .

Description (male)

SIZE. Length 23 mm, max width 2.0 mm.

COLOUR. After 10 years in alcohol, overall impression: contrasting dark and pale transverse bands. Head brown; collum black; prozonites yellowish white; metazonites black; antennae and legs light yellow; telson brown, darker (black) dorsally.

ANTENNAE. Reaching back to middle of ring 4.

BODY RINGS. Paranota completely absent. Stricture deep, broad, smooth. Setae absent, except for a middorsal pair on ring 2.

HYPOPROCT. Semicircular, no distinct tubercles.

LEGS. Length 1.5× body width. Relative lengths of podomeres: femur> tarsus> prefemur> tibia> postfemur. Scopulae present on tibia and tarsus on pre-gonopodal legs ( Fig. 26C View Fig. 26 ); also present, but poorly developed, on femur and postfemur. Prefemur and femur of post-gonopodal legs ventrally smooth, almost hairless ( Fig. 26B View Fig. 26 ).

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

STERNUM 6 ( Fig. 26 A View Fig. 26 ). Deeply excavated. Lateral rims of excavation produced into two lobes on each side, one lobe at basis of each leg.

GONOPODS ( Fig. 27 View Fig. 27 ). Coxal lobe (cxl) moderately developed. Prefemoral part (prf) ca half as long as acropodite. Mesal acropodital process (map) long, straight, stout, with a deep, broad furrow on apical part of mesal surface, apically with three stout, triangular tines (tn1, tn2, tn3) and a transverse, dentate ridge (dr). Solenophore (sph) a simple rolled sheet, considerably shorter than process map, apically with two small processes.

Distribution and habitat

Known only from the West Kilombero Scarp FR, Ndundulu Forest, 1550 m a.s.l. Habitat: tropical semievergreen forest. Collected together with E. grumslingslak   sp. nov.

Remarks

The ventrally smooth prefemora and femora is an unusual feature of this species, shared only with E. kangense   sp. nov. (see Discussion).

ZMUC

Zoological Museum, University of Copenhagen