Ommatoiulus litoralis, 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 : 17-19

Ommatoiulus litoralis sp. nov

urn:lsid:zoobank.org:act:4BCEFAB9-9C52-4C42-958F-A7EB03707221

Figs 12–14

Ommatoiulus SP.4 – Bailey & De Mendonça (1990)

Diagnosis

Similar to O. moreleti (Lucas, 1860) and O. bipartitus with a solenomerite divided into 3 processes and bearing a distolateral lamella and a broad distally expanding paracoxite but different in everything else.

Etymology

The species epithet is a Latin adjective meaning “of the coast” and refers to the affinity of the specie with coastal habitats.

Material examined

Holotype

PORTUGAL: 1 ♂, Faro District, Cape St. Vincent, near Sagres, under low bush, in litter, 10 Apr. 1987, P.T. Bailey leg. (ZMUC), Bailey sp. 4.

Paratypes

PORTUGAL: 1 ♀, 2 juveniles, same data as the holotype; 1 ♂, Faro District, Aljezur Province, Praia de Bordeira, sandy dunes, 37.193917 N, 8.904633 W, alt. 50 m, 12 Apr. 2005, P. Cardoso leg. (ZMUC); 1 ♂, Faro District, Algarve, Cape St. Vincent, 2 Mar. 1981, D. Kime leg. (NHMW 8741).

Description

MEASUREMENTS. Males: L = 25.3–27.8 mm, H = 1.7–2.4 mm, 40–43 PR+2 AR+Telson. Female: L = 37.4 mm, H = 2.9 mm, 42 PR+2 AR+Telson.

COLOUR. Light brown, mostly faded in alcohol ( Fig. 12 ). Prozonites dark brownish, with black sputter denser on the lateral side at the line of ozopores ( Fig. 12 B) and forming triangular spots along the middorsal line, metazonites pale whitish and translucent; dorsum with a thin black mid-dorsal line; legs pale brown to yellowish; head light brownish ( Fig. 12 A), mouthparts bright yellowish; anal valves with obviously faded black sputter, preanal ring pale ( Fig. 12 C). Prozonites with oblique striae; metazonites with regular striation; suture complete, rectilinear but sometimes with a sinus at ozopore level. Anal valves setose with a marginal row of short setae, a submarginal row of longer ones and 1–2 (? perhaps more, broken) setae on the disc. Subanal scale triangular, pointed and setose. Preanal ring with a protruding caudal projection with (5+5) setae and bearing a straight, relatively thick hyaline process.

GONOPODS ( Figs 13 , 14). Promerite (P) in posterior view slender, subrectangular with parallel margins and slightly curved laterad; mesal ridge (Mr) thin, merging with the mesal margin and distally ending in serrated subapical process; apically almost straight, showing a small hyaline process extending beyond the apical margin; rudimentary telopodite (T) oval, consipicuous on the posterior surface at mid-length of the promerite. Posterior gonopod ( Figs 13 , 14): Mesomerite (Ms) slender and curved anteriad to nest against the promerite, apically narrowing into a pointed tip; solenomerite (S) large with 3 distinct processes: an anterior process (Sa) the longest, gently narrowing apically and curved anteriad, a median process distally bearing a hyaline lamella (Hl) and a posterior process (Sp) the thinnest and most acuminate apically lodging the opening of the seminal groove 'og'; the seminal groove (g) running from the fovea (F) located at the base of the solenomerite up to og; paracoxite (Px) broad, distally expanding in a hammer-shaped process pointing posteriad; coxa (Cx) large and rounded, protruding distad.

Distribution

South Portugal, Algarve.

Figures

Fig. 12. Ommatoiulus litoralis sp. nov. Paratype, ♂ from Aljezur, lateral views. A. Head and anteriormost body rings. B. Mid-body rings. C. Posterior-most body rings.

Fig. 13. Ommatoiulus litoralis sp. nov. Paratype, ♂ from Algarve, gonopods. A. Left gonopod, mesal view. B. Left gonopod, lateral view. C. Right promerite, posterior view. D. Right posterior gonopod, postero-mesal view.

Fig. 14. Ommatoiulus litoralis sp. nov. A – B. Paratype, ♂ from Aljezur, right gonopod. A. mesal view. B. Disto-mesal view. C – D. Paratype, ♂ from Algarve, right gonopods. C. mesal view. D. lateral view.