Ommatoiulus hoffmani Akkari & Enghoff, 2012

Akkari, Nesrine & Enghoff, Henrik, 2012, Review of the genus Ommatoiulus in Andalusia, Spain (Diplopoda: Julida) with description of ten new species and notes on a remarkable gonopod structure, the fovea, Zootaxa 3538, pp. 1-53 : 21-23

Ommatoiulus hoffmani Akkari & Enghoff n.sp.

Figs 47–50

Material. Holotype: 1 ♂, Andalusia, Almería, Rodalquilar , 36º51'16"N, 2º02'25"W, dry rocky hill, under stones, 22.iv.2008, H. Enghoff, Y. de Jong, K. Mohr leg. ( ZMUC) . Paratypes: 3 ♀♀, 2 immatures, same data as holotype, H. Enghoff, Y. de Jong, K. Mohr leg. ( ZMUC) .

Diagnosis. Most similar to O. niger and O. ibericus but differing in the apical part of the solenomerite bearing blunt serrations on the anterior process devoid of a subapical ‘claw’ (unlike O. niger ) and a longer mesal process lodging the seminal groove (unlike O. ibericus ).

Etymology. Species named in honour of the late Richard L. Hoffman (1927–2012), in recognition of his immense contribution to our knowledge of millipede taxonomy.

Description. Male: L: 25 mm, H: 2.5 mm, 50 PR+2 AR+T. Female: L: 32 mm, H: 3.0 mm, 49 PR+2 AR+T. General colour grayish brownish. Prozonites tawny brown sputtered with black on the lateral sides, condensed as black spots at ozopore level, metazonites light brown anteriorly, much darker to black posteriorly. Antennae purple brown; collum and head grayish marbled with yellow in the center, mouthparts yellowish. Dorsum with a thin middorsal line. Legs light brown. Anal valves, subanal scale and preanal ring yellowish, densely sputtered with black. Metazonites with regular striation and short slender setae on the posterior margin, ozopores opening at a distance ca. their diameter behind suture, suture complete, curving at ozopore level. Telson: Preanal ring with a protruding caudal projection bearing several setae and a small hyaline tip; anal valves with a marginal row of short setae, a submarginal row of longer ones and 5–6 setae on the surface, subanal scale triangular with a blunt tip beraing numerous setae. Gonopods: Promerite sub-rectangular, resembling that of O. baenai n. sp. (cf. Fig. 3). Posterior gonopod ( Figs. 47–50): Mesomerite (Ms) simple, longer than promerite, uniformly slender and slightly curved distad, apically bearing 2 small hooks (h1, h2) ( Figs 49, 50); solenomerite (S) broad at the base with a jagged lamella (jl) ( Fig. 49) at the anterior margin, only slightly narrowed at midlength, distally expanded, asymmetrical and ramified into 1) a posterior lower pointed, strongly serrated, conical process (Cn) ( Figs 48–50), 2) a blunt rounded process (br) ( Fig. 50), 3) a small concial process (Cp) ( Figs 48–50) folded and lodging the opening of the seminal groove ( Figs 47, 49), 4) an anterior lamella with jagged surface (Alj), separated from the rest by a deep narrow notch (no1), apically narrowed, protruding in several small blunt teeth (bt) ( Fig. 50). Seminal groove (g) running posteriorly from the fovea (F), located at the base of the solenomerite, up to process Cp. Paracoxite (Px) stout, of the same length as the solenomerite, broadened distally with a big lobe (Alp) on the anterior margin ( Fig. 47), subapically strongly narrowed, projecting into a thickened apical triangular process pointing mesad.

Distribution. Known only from the type locality in Almería, Andalusia.

Habitat. Found in dry habitat, under stones.