Type locality: Baltic Sea, Germany.
Body fusiform, elongate, slender; cuticle very flexible, outline variable; hyaline. Head offset by distinct neck-fold. Tail prominent, rounded. Foot very long, ≥ 4 1/4 total length, 2 pseudosegments, basal pseudosegment short, stout, c. 1/3 length slender terminal pseudosegment; foot telescopically retractable within body. Toes long, slender, lanceolate. Corona slightly oblique, 2 lateral ciliary tufts. Brain moderately large, saccate. Two frontal eyespots, set close together, occasionally fused, often disappearing in adults. Retrocerebral organ absent. Stomach and intestine separated by shallow constriction; proventriculus present. Gastric glands rounded, compressed laterally. Pedal glands very long, elongated, extending into trunk.
Male with functional (?) mastax; foot short, toes lanceolate with slightly drawn-out tips, decurved ventrally.
Rami asymmetrical, broadly triangular, short, alulae short, ± acute; inner margins right with 1-(2) pair(s) of close set teeth; left basal apophyse very large, right short, small; dorsal fenestrae postero-lateral, right larger; a single ventral fenestra, left. Fulcrum very short, in ventral view rod-shaped with slightly expanded posterior end, in lateral view slightly curved. Unci with 4-5 clubbed teeth, ± gradually decreasing in size, principal teeth each with accessory toothlet ventrally; inner side with preunci and plate with skleropili. Manubria long, slender, clubbed, head with 2 short lateral cavities; opening of posterior cavity on inner side, opening of median and anterior cavity externally; posterior end incurved.
Length 200-380 µm, toe 20-28 µm; trophi 30-45 µm: ramus 9-12 µm, fulcrum 6 µm, uncus 12-14 µm, manubrium 24-25 µm.
Length male 150-155 µm.
Catalog number: 19966
Collection: National Museum of Natural History, Smithsonian Institution, Washington DC, USA
Prepared by: Myers, F J
Preparation: Slide Preparation; Microscope slide
Specimen Count: 2
Depth range (m): 0.75 - 0.75
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
Marine but reported also for freshwater habitat.
Food: dinoflagellates, small diatoms, bacteria.
Wide-spread in vegetation and sedimentation zone, rock pools, marine and brackish tide puddles, in brine channels of arctic sea ice; -1.5-20°C, salinity 6-40‰.