Micrura albifrons, Timofeeva, 1912

Kajihara, Hiroshi, 2025, A taxonomic revision of the freshwater monostiliferous hoplonemertean genus Prostoma Dugès, 1828 (Nemertea: Eumonostilifera): a radical solution or an over-lumping?, Zootaxa 5646 (4), pp. 451-500 : 489

12. Micrura albifrons

[No illustration in the original description]

Description. Body 18 to 35 mm long and about 1 mm wide. Head, in area of lateral slits, slightly widened. Body brick in colour, with brownish or cherry tint. Ventrally only sometimes lighter than dorsal surface, but always coloured. Anterior end of head and edges of lateral slits white; tail transparent. Dorsally with about 16 narrow stripes, wider in middle, tapering to body edges. At cephalic tip, 5–6 black eyes clearly visible against background, located in two lateral groups.

Localities. Sublittoral, silt, ca. 16–18 m depth (Annex Fig. 2 , IV) . Cabrette, sand with coralines, depth ca. 40 m.

Figures

FIGURE 2. Prostoma clepsinoides Dugès, 1828 from Lake Biwa, Japan. A, Entire specimen in living state, lost after photographed. B, C, Transverse sections through proboscis anterior chamber; white arrowheads pointing to proboscis nerves. D, Sagittal section through the opening of the oesophagus–rhynchodaeum complex; black arrowheads pointing to cilia on ventral wall of oesophagus; anterior to the left. E, Magnification of D, showing sparse cilia on ventral wall of oesophagus, indicated by black arrowheads. F, Magnification of D; black arrowhead pointing to longitudinal muscle fibre along rhynchodaeum.G, Sagittal section near rhynchodaeal opening; anterior to the right. B, D, E, F, ICHUM 6272; C, ICHUM 6277; G, ICHUM 6273.