Eviulisomatini Brölemann, 1916

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 : 7

Tribe Eviulisomatini Brölemann, 1916

Diagnosis

Paradoxosomatidae in which paranota are very strongly reduced or virtually absent, and the ʻfemoriteʼ of the gonopod is strongly reduced, such that solenomere, solenophore and up to two acropodital processes seem to originate directly from the end of the prefemoral part.

Eviulisoma is classified in the tribe Eviulisomatini which, according to Nguyen & Sierwald (2013) and Reboleira & Enghoff (2013), also contains Boreviulisoma Brolemann, 1928 (SW Palaearctic: NW Africa, SW Europe), Eoseviulisoma Brolemann, 1920 (Afrotropical) , Onciurosoma Silvestri, 1932 (Neotropical) , Scolodesmus Cook, 1896 (Afrotropical) , Suohelisoma Hoffman, 1964 (Afrotropical) and Wubidesmus Chamberlin, 1927 (Afrotropical) . To these should be added Jeekelosoma Mauriès, 1985 , raised to full generic status from subgenus under Eviulisoma by Enghoff & Reboleira (in prep.), and possibly Stirosoma Attems, 1953 (Afrotropical) . See below concerning Eoseviulisoma and Suohelisoma . In the key to Central African eviulisomatinine genera by Hoffman (1971), Eviulisoma keys out together with Suohelisoma in couplet 1 because of the ʻdorsalʼ (actually cranio-distal) lobe on the mesal side of the gonopod coxa. These two nominal genera also share the strongly excavated sternum 6 (absent in a few species of Eviulisoma , however), a character also present in Wubidesmus . Variously excavated sterna 6 have been described for certain other paradoxosomatids, e.g., Luzonomorpha pallidula Jeekel, 2000 , and Montesecaria golovatchi Jeekel, 2002 ( Jeekel 2000, 2002), but as far as can be deduced from the descriptions, these excavations are quite different from those seen in Eviulisoma spp. Most eviulisomatinine genera share a strongly reduced body ring setation: two rows of very thin setae on the collum and only one row on each of the following body rings. The majority of paradoxosomatid genera have two or three rows of setae on postcollar body rings, and this character state is shared by the eviulisomatinine genera Boreviulisoma ( Reboleira & Enghoff 2013) and Jeekelosoma ( Mauriès 1985; Enghoff & Reboleira in prep.).

Table 1 summarizes some important characters across the eviulisomatinine genera.