Plate 1 issued from : G. Costanzo, M. Campolmi & G. Zagami in J. Plankton Res., 2000, 22 (10). [Figs.2, 3]. Female (from W Sicily): A, habitus (dorsal view); B, urosome (ventral); C, genital double-somite (right side); D, idem (left side); E, P5 (posterior view); F, P1; G, P2; H, P3, I, P4.
Plate 2 issued from : G. Costanzo, M. Campolmi & G. Zagami in J. Plankton Res., 2000, 22 (10). [Fig.4]. Male: A, habitus (dorsal view); B, urosome (ventral view); C, A1; D, P5.
Plate 3 Issued from : J.-M. Brylinski & L. Courcot in Bioinvasions Records, 2019, 8. [p.7, Fig.4]. Female (from 47°52'06''N, 03°55'00''W): A, ventral view of genital double-somite (DGS) and anterior surface of P5.>@ = asymmetry of postero-lateral corner of prosome; GO = genital operculum; B-C, right and left P5, respectively. Diagonal arrows = central spines. Scale bars: 100 µm (A); 10 µm (B-C).
Nota: - Posterolateral corners of prosome slightly asymmetrical, left side more elongated than right side and compressed in distal part. - Urosome 4-segmented. - Genital double-somite with vental genital aperture closed off by single unarmed and asymmetrical operculum . Proximal part of ventral and lateral surfaces on right side with incomplete transverse row of spinules; left side and dorsal surface ornamented with patch of minute spinules. - P5 uniramous, 2-segmented, twisted posterioely and asymmetrical with right longer than left. Terminal part of segment 2 fringed by marginal spinules and ornamented with patch of spinules in middle of anterior surface, thicker on right leg. 1 very small central spine present distally to patch of spinules in both legs.
coastal; hyperbenthic. Also collected, for the first time off the mediterranean Sea, in the inner storage tank of the Marinarium at Concarneau by Brylinski & Courtot (2019) at temperature and salinity: 14°C, 36.0 psu and , 12 °C, 35.0 psu; 18 °C, 35.5 psu, and 19 °C, 35.0 psu, respectively in November, April, September and July. The species belongs to ''group IV'' (see genus Stephos)
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