Atyaephyra desmarestii (Millet, 1831)

Description. Rostrum long, dorsal margin straight or slightly curved in the middle and pointed upwards, 3.79–8.70, mostly (82% of the individuals examined) 4.64–6.50, × as long as high, shorter, equal to, or longer than scaphocerite. From 17 to 36 (21–28 in 86% of the individuals examined) pre orbital teeth on dorsal margin of rostrum arranged to tip. One to five, most frequently (90% of the individuals examined) 2–4, post orbital teeth and 1–13, most often (88% of the individuals examined) 4–9, on ventral margin of rostrum. Carapace smooth with pterygostomial angle not protruding, rounded (Anastasiadou et al. 2006; Fig. 1). Pleuron of fifth abdominal segment pointed with an acute posterior angle. Telson with 2–4, most frequently (95% of the individuals examined) 3–4, pairs of dorsal spines arranged in curved fashion. Distal border of telson with 7–15, mostly (89%) 9–13, spines (4–7 pairs) arranged in a fan-like way. Outermost pair of spines shortest, similar to dorsal spines, adjacent pair stronger, terminating before the inner, finely setulose pairs (Anastasiadou et al. 2006; Figs 2A–B). Antennulary stylocerite with its tip failing to reach, reaching or overreaching distal margin of basal peduncle segment. Anterolateral lobe of basal segment short, round or pointed. Distal segment of antennular peduncle with 0–2, predominantly (93%) 1–2, spines (Anastasiadou et al. 2006; Fig. 2D). Basal lower endite of maxilla densely covered with long simple setae arranged in 15–22, mostly (84%) 17–20, oblique parallel rows. Endite of maxilla 1.39–1.88, most often (90%) 1.49–1.71, × as long as basal lower endite (Anastasiadou et al. 2006; Fig. 3C). Basal endite of first maxilliped reaching clearly beyond distal end of exopod (Anastasiadou et al. 2006; Fig. 3D). Distal one-third of terminal segment of third maxilliped bearing 0–8, (1–6 in 91% of the individuals examined), mesial spines and one subdistal lateral spine near the base of larger terminal spine, interpretable as dactylus (Anastasiadou et al. 2006; Fig. 3G). Armature along flexor margin of dactylus of third and fourth pereiopod consisting of 5–10 (6–8 in 95% of the individuals) and 5–10 (6–8 in 94% of the individuals) spines respectively. Merus of third and fourth pereiopod with 1–7 (3–5 in 95% of the individuals) and 2–6 (3–5 in 99% of the individuals) spines respectively (Anastasiadou et al. 2006; Figs 4C–D). Armature along flexor margin of dactylus of fifth pereiopod consisting of 18–43, mostly (87%) 25–35, spines (Anastasiadou et al. 2006; Figs 4E–F). Endopod of first male pleopod expanded proximally and with a distal portion elongated and tapering, often with a small protruding lobe in its outer subdistal part. Endopod with 14–30 (16–25 in 86% of the individuals examined), spines arranged on a slightly curved inner margin and 9–17 (10–15 in 92% of the individuals examined), setae arranged on outer margin (Anastasiadou et al. 2006; Fig. 5C, Anastasiadou et al. 2008; Fig. 5C). 133–848 eggs of 0.4–0.7 × 0.25–0.4 mm size.