Kieffer, 1921
Body
Medium sized larvae over 8 mm long. Living larvae reddish. No lateral and ventral tubules. (Wiederholm, 1983; Moller Pillot, 1984a).
Head
The head capsule is dull due to the course granulation. Anterior margin of frontal apotome is convex without a subapical pit. Labral sclerites 1 absent, sclerite 2 present.
Antenna
The antenna consists of 5 segments. The blade is as long as the flagellum. Lauterborn organs distally on the second segment.
Mentum
The mentum has 4 black median teeth. The middle pairs is somewhat shorter than the outer pairs. The first lateral tooth smaller than the neighbouring teeth. 6 pairs of black lateral teeth present Phaenops mentum. The ventromental plates are almost as wide as the mentum.
Labrum
SI is plumose on both sides and labral lamellae a single plate with numerous distal teeth. The pecten epipharyngis consists of 3 small toothed plates. The premandible has 3 teeth.
Mandible
The mandible with a black dorsal tooth, apical tooth and 3 inner teeth black Phaenops mandible. The pecten mandibularis apparently absent is present and seta interna with 4 plumose branches.
Differential characteristics
The dull headcapsule and 4 median mental teeth are distinctive Phaenops mentum.
Diversity
European species: 2
Treated species: 0