Orthocladius (Euorthocladius)

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 : 241

Orthocladius (Euorthocladius) ( Fig. 57 )

This is a new morphotype, not listed in Brooks et al. (2007).

Head capsule dark brown with black occipital margin. Mentum triangular in shape with weak striation and light brown teeth. Median tooth and first lateral teeth rounded, first lateral narrower at the base. Ventromental plates characteristic: darkly pigmented, extended well below seta submenti, angling inwards apically, with an obvious bulb at the base. Setae submenti positioned below the base of ventromental plates. Mandible with first inner tooth large, outer margin smooth.

Figures

FIGURES 54–59. Metriocnemus fuscipes-type: 54—head capsule. Orthocladius (Orthocladius) dentifer-type: 55—head capsule. Orthocladius (Mesorthocladius) frigidus: 56—head capsule (arrow indicates seta submenti). Orthocladius (Euorthocladius): 57—head capsule. Parametriocnemus/Paraphaenocladius: 58 (arrow indicates seta submenti). Parorthocladius: 59—head capsule.