Labiobaetis operosus ( Mueller-Liebenau , 1984)

Kaltenbach, Thomas & Gattolliat, Jean-Luc, 2019, The tremendous diversity of Labiobaetis Novikova & Kluge in Indonesia (Ephemeroptera, Baetidae), ZooKeys 895, pp. 1-117 : 1

20. Labiobaetis operosus ( Mueller-Liebenau, 1984) Figures 35 , 53b

Diagnosis.

Larva. Following combination of characters: A) dorsal surface of labrum with submarginal arc of ca. ten feathered setae; B) labial palp segment II with thumb-like distomedial protuberance, segment III slightly pentagonal, apically slightly truncate; C) hypopharynx with medial tuft of stout setae well developed; D) fore femur rather slender, length 3.8 × maximum width, dorsal margin with a row of ca. ten spine-like setae; E) paraproct distally not expanded, with ca. 16 stout marginal spines.

Examined material.

Holotype. 1 larva (on slide, no. 34), W. Malaysia, Gombak River, 4½ miles N of Kuala Lumpur, nr. Bentong road, 18.IX.1969, Bishop leg.

Figures

Figure 35. Labiobaetis operosus, larva morphology: a Labrum b Maxilla c Labial palp d Paraproct.

Figure 53. Distribution of Labiobaetis in Southeast Asia: a localities of all Labiobaetis species b Labiobaetis species presently known.