Diamesinae, Kieffer, 1922

Chamutiová, Tímea, Hamerlík, Ladislav & Bitušík, Peter, 2020, Subfossil chironomids (Diptera, Chironomidae) of lakes in the Tatra Mountains an illustrated guide, Zootaxa 4819 (2), pp. 216-264 : 219

Diamesinae ( Fig. 1 )

Head capsules of the subfamily is yellowish brown to dark brown or black with black and wide occipital margin. Surface of dorsal head mostly smooth, rarely covered with numerous short setae ( Protanypus ), or with tubercles ( Boreoheptagyia ). Third antennal segment annulated with exception of Protanypus . Premandible with 1–16 teeth. Mandible with apical tooth and 4–5 inner teeth. Mentum variable in shape with 4 ( Protanypus ) to 23 teeth, rarely without teeth ( Potthastia longimanus group). Ventromental plates rudimentary to very large ( Pseudodiamesa ) ( Brooks et al. 2007; Ilyashuk at al. 2010).

Larvae are rheophilic to rheobiontic, but also occur in the littoral zone as low temperature and high oxygen content combined with wave action create conditions resembling flowing waters.

Figures

FIGURES 1–8. Diamesinae, Pseudodiamesa nivosa: 1—head capsule. Prodiamesinae, Prodiamesa olivacea: 2—head capsule. Tanypodinae, Procladius: 3—detail of head capsule. Tanypodinae, Zavrelimyia: 4—head capsule. Orthocladiinae, Chaetocladius piger-type: 5—head capsule. Chironominae (Chironomini), Chironomus anthracinus-type: 6—head capsule. Chironominae (Tanytarsini), Micropsectra junci-type: 7—head capsule. Chironominae (Tanytarsini), Micropsectra radialistype: 8—head capsule. li—ligula, pl—paraligula, dt—dorsomental teeth, a—antennae, ma—mandible, om—occipital margin, me—mentum, vp—ventromental plate, b—beard, p—projection on occipital margin, at—apical tooth of the mandible, it—inner teeth of the mandible, ap—antennal pedestal, pm—premandible, s—spur, pp—post-occipital plate, ss—seta submenti