Ommatoiulus camurus, 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 : 10-12

Ommatoiulus camurus sp. nov.

urn:lsid:zoobank.org:act:73D3CA71-7B9F-41B9-AA27-029C24F12E0D

Figs 6–8

Diagnosis

A large species. Most similar to O. armatus ( Verhoeff, 1910) and O. dorsovittatus ( Verhoeff, 1893) , agreeing with these in the presence of a lateral notch on the promerite, a curved bifurcate mesomerite and a reduced paracoxite. Differing from both in the modified apex of the promerite, the deep curvature of the mesomerite and the shape of the solenomerite.

Etymology

The species epithet is a Latin adjective meaning curved and refers to the strongly curved shape of the posterior gonopods.

Material examined

Holotype

PORTUGAL: 1 ♂, Faro District, Algarve, Cape St. Vincent, 2 Mar. 1981, D. Kime leg. (ZMUC).

Paratypes

PORTUGAL: 2 ♀♀, same data as holotype.

Description

MEASUREMENTS. Male: L = 45 mm, H = 5 mm, 45 PR+2 AR+Telson. Females: L = 35–47 mm, H = 4.5–6.1 mm, 41 PR+3 AR+Telson.

COLOUR. After 35 years in alcohol ( Fig. 6 ). Prozonites uniformly light grey perhaps with faded marbling, metazonites anteriorly pale, dominated by a strong reddish brown colour with dense black sputter posteriorly and showing a striking yellow band on the posterior margin, a thin black mid-dorsal line; legs brownish; head dark brown, mouthparts lighter, antenna dark brown; telson and anal valves brownish. Prozonites with 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, disc glabrous (setae broken?); subanal scale triangular, clearly protruding and setose; preanal process broken on all specimens.

GONOPODS ( Figs 7–8 ). Promerite (P) in posterior view broad at the base, gradually narrowing distad, lateral margin expanded and rounded, distally incised in a rounded notch; mesal ridge (Mr) broad and fusing with the mesal margin; promerite apex marked with a fold with a strongly sclerotized and serrated process on the mesal margin, and a subapical notch on the lateral one; rudimentary telopodite (T) small, located basally, close to the mesal ridge. Posterior gonopod: mesomerite (Ms) broad, hookshaped and strongly curved, distally bifurcating into two thin asymmetrical and downturned processes pointing meso-basad; solenomerite (S) much shorter than Ms, bearing strong serrations on the anterior and apical margin and fringed with a large number of spikes, and a thin acuminate mesal process (Sm) pointing distad; posterior process of the solenomerite (Sp) showing an acute tip lodging the opening of the seminal groove 'og'; seminal groove (g) running posteriorly from the fovea (F) located at the base of the solenomerite up along Sp and opening in og ( Figs 7 D, 8B); paracoxite (Px) reduced, emerging from a bipartite round coxa (Cx) ( Figs 7 D, 8B–C).

Distribution

South Portugal, Algarve.

Figures

Fig. 6. Ommatoiulus camurus sp. nov. Holotype, ♂. A. Head and anteriormost body rings, lateral view. B. Mid-body rings, lateral view.

Fig. 7. Ommatoiulus camurus sp. nov. Holotype, ♂. A. Left gonopod, posterior view. B. Right promerite, posterior view. C. Right posterior gonopod, lateral view. D. Left posterior gonopod, mesal view.

Fig. 8. Ommatoiulus camurus sp. nov. Holotype ♂, gonopods. A. Right promerite, posterior view. B – D. Right posterior gonopod: B. Mesal view. C. Posterior view. D. Lateral view.