Neopleustes Stebbing, 1906

Genus Neopleustes Stebbing, 1906 View in CoL

Neopleustes Stebbing, 1906: 311 View in CoL .

Neopleustes View in CoL – Gurjanova 1951: 641; 1972: 133, 163. — Barnard 1969: 424. — Barnard & Karaman, 1991: 649. — Hendrycks & Bousfield 2004: 94.

Type species

Amphitoe pulchella Krøyer, 1845 View in CoL : pl. 10.

The genus NeopleusteS View in CoL contains seven known species ( Horton et al. 2024) and a species new to science described herein: N. boecki ( Hansen, 1888) View in CoL ; N. carinatus Margulis, 1963 View in CoL ; N. columbianus Hendrycks & Bousfield, 2004 View in CoL ; N. euacanthoides Gurjanova, 1972 View in CoL ; N. euacanthus (G.O. Sars, 1877) View in CoL ; N. kussakini ( Budnikova, 1995) View in CoL ; N. pulchellus ( Krøyer, 1846) View in CoL .

Diagnosis (from Hendrycks & Bousfield 2004 and Labay 2021)

Body middorsally carinate or mucronate, rarely smooth. Rostrum medium to strong, often keeled. Antenna 1 elongate, often longer than body. Antenna 2 distinctly shorter than antenna 1.

Lower lip, outer lobes oblique, widely separated by low flat inner lobes. Mandibular molar process small, thumb-like, without triturating surface; left lacinia 7–10-dentate; palp powerful, length exceeding by 2–3 times that of the mandibular body. Maxilla 2, inner plate, inner marginal seta set apart basally from apical setae. Maxilliped, inner plate truncate, with 3–7 apical button spine-like setae; outer plate slender; palp segments slender; segment 3 with short, outer distal conical projection, dactylus articulated from its medial side.

Coxal plates 1–4 medium, increasing in size posteriorly; coxal plate 1 not bent forwards distally, posterodistally cuspate. Coxal gills medium, sack-like.

Pereopods 1–2 (gnathopods 1–2) weak, subchelate, subsimilar; posterodistal tooth of merus weak or lacking; carpus elongate, shorter than propodus, posterodistal lobe shallow; propodus with short, oblique, weakly toothed palmar margin; posterior margin setose.

Pereopods 5–7 regular, homopodous, bases usually convex behind. Epimeral plates 2–3, posterior corners acute, produced. Uropod 1 with distolateral peduncular spine-like seta; rami subequal.

Telson with proximal keel.

Distribution

Marine waters of the Arctic and boreal parts of the Northern hemisphere.