Ommatoiulus denticulatus, Nesrine Akkari & Henrik Enghoff, 2017

Nesrine Akkari & Henrik Enghoff, 2017, Revision of the genus Ommatoiulus Latzel, 1884 (Julida, Diplopoda) in Portugal, with description of six new species, European Journal of Taxonomy 295, pp. 1-42 : 13

Ommatoiulus denticulatus sp. nov.

urn:lsid:zoobank.org:act:0BBB5341-B3AB-4D79-A593-D86BCB263EAC

Figs 9–10

Ommatoiulus SP.6 – Bailey & De Mendonça (1990).

Diagnosis

Most similar to O. alacygni sp. nov. and O. staglae sp. nov., but differs by the three-digitate shape of the anterior process of the solenomerite and the strong serrations on the lateral margin of the paracoxite.

Etymology

The species epithet is a Latin adjective meaning “with small teeth” and refers to the serrations on the lateral margin of the paracoxite.

Material examined

Holotype

PORTUGAL: 1 ♂, Beja District, Mértola, in Pine litter, 15. May 1985, P. Bailey leg. (ZMUC).

Paratypes

PORTUGAL: 1 ♂, 1 ♀, same data as holotype.

Description

MEASUREMENTS. Male: L = 27.7 mm, H = 2.5 mm, 45 PR+3 AR+Telson. Female: L = 27.8 mm, H = 2.6 mm, 47 PR+2 AR+Telson.

COLOUR. Brownish, probably faded after more than 30 years in alcohol. Prozonites pale grey with black sputter, posteriorly forming dorsal triangular spots; metazonites yellowish-brown, with a black sputter posteriorly and scattered setae near the posterior margin ( Fig. 9 A); dorsum with a thin black mid-dorsal line; legs pale brown to yellowish; head dark brown with dense black sputter, lighter towards the labral zone, mouthparts yellowish; antennae and telson dark, with a dense black sputter. Prozonites with narrow oblique striae; metazonites with regular striation; suture complete, rectilinear but sometimes with a sinus at ozopore level. Anal valves with a marginal row of short setae, a submarginal row of longer ones and ca 5 setae on the disc. Subanal scale triangular, pointed and setose. Preanal ring ( Fig. 9 B) with 2 setae on the sides, a protruding caudal projection bearing ca 8 setae and a small hyaline straight projection.

GONOPODS (FIGS 9C–F, 10). Promerite (P) in posterior view broad at the base, gradually narrowing distad, lateral margin rounded; mesal ridge (Mr) broad and fusing with the mesal margin; rudimentary telopodite (T) not conspicuous. Posterior gonopod: mesomerite (Ms) simple and very reduced; solenomerite (S) complex, broadest at the base, showing an large anterior process (Sa) apically ramified in 3 asymmetrical tips and bearing a subapical median triangular hyaline lamella (Hl); posterior process of the solenomerite (Sp) long with an acuminate tip lodging the opening of the seminal groove 'og'; seminal groove (g) running from the fovea (F) located at the base of the solenomerite up to og; paracoxite (Px) large, twisted meso-posteriad, distally leaf-shaped with a pointed apex and showing strong serrations on the lateral margin; coxa (Cx) large and rounded.

Distribution

Southeast Portugal, Mértola.

Figures

Fig. 9. Ommatoiulus denticulatus sp. nov. Holotype ♂. A. Head and anteriormost body-rings, lateral view. B. Telson, lateral view. C. Right gonopod, lateral view. D. Right gonopod, mesal view. E. Right gonopod, posterior view. F. Right gonopod, postero-lateral view.

Fig. 10. Ommatoiulus denticulatus sp. nov. Holotype ♂. A. Right gonopod, mesal view B. Right gonopod, posterior view.