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Sars, 1888

Body slender. Cephalon about as long as the three following segments together, with the neck distinct, though not very elongated; the frontal part somewhat expanded towards the tip. Abdomen comparatively small, cylindrical and directed upwards.
Ocular tubercle rather low, truncated at the top and furnished with projecting lateral corners. Proboscis shorter than the cephalon, cylindrical. Chelifores small and feeble; hand shorter than the scape, comparatively narrow and densely hairy; the fingers as long as the palm, with sharply curved points. Palps relatively short and densely hirsute, 2nd and 3rd segments equal in length, penultimate segment somewhat shorter than the ultimate one and both together longer equal in length to the third segment.
Ovigerous legs with ten segments present in both sexes; longer than the body length; marginal spines very slender, dagger-shaped, shortly serrated on the edges.
Ambulatory legs beset delicate, scattered hairs, about four times as long as the body; tibia 2 narrow linear in form, about two and a half times as long as the terminal section; tarsus comparatively short; propodus uncommonly long, almost a half longer than the tarsus and somewhat swollen in the middle, inner edge armed with a dense series of thin spines; terminal claw about half the length of the propodus; auxiliary claws very small and rudimentary.
Length of the body up to 5.5 mm; the extent between the points of the ambulatory legs reaching 48 mm.


A northern species.

Nymphon longimanum