Tokunagaia scutellata

Author: (Brundin, 1956)

Diagnosis (n=1, material in coll. ZMBN; in part after Halvorsen and Saether, 1987a - in italics)
Exuviae 3.0mm long.
Colour: Pale exuviae; brownish, very slightly darkened posteriorly, i.e. without the broad brown posterior bands of the preceding species.
Cephalothorax: Frontal setae and warts absent. Antennal sheath with weak pearl row distal to pedicel, pearls stronger on inner margin. Ocular field with 1 postorbital. Thoracic horn absent. Precorneal setae 1-3: 25; 25; 25µm. Wing sheaths without pearl row.
Abdomen: Segments II-VIII dorsally nearly covered with small points except for the adhesion marks. Hook rows on tergites continuous; hooks III 33, IV 32, V 29. Posterior transverse row of strong points on tergite II without small points behind. Tergite III with points small, longest about 4µm long, hardly longer than broad at base. Posterior teeth III 15, V 20µm long. Pedes spurii A and B absent. Longest lateral seta VIII 33µm long.
Anal segment: Anal lobe ratio 2.0. Anal lobes without fringe. Anal macrosetae 0.8x lobe length. Male genital sheaths not reaching half-way along the anal macrosetae.

Note: Tokunagaia tonollii (Rossaro) is extremely similar and possibly not distinguishable from this species.

Species keys out at Page 697: Orthocladiinae 109 Tokunagaia of the Text Key.

(For more information see module IdentifyIt – file: Orthocladiinae).

Ecological notes
Streams and rivers.