Cricotopus (Paratrichocladius) skirwithensis (Edwards, 1929)

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 : 233

Cricotopus (Paratrichocladius) skirwithensis - type ( Figs 37, 38 )

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

Head capsule light brown with dark brown occipital margin and mandibular teeth. Mentum triangular in shape with a single median tooth up to 2 times width of first lateral tooth. First lateral tooth of the mentum is clearly rounded, wider in the middle than at the base. Remainder of lateral teeth pointed. First inner tooth of the mandible large, noticeably broader than apical tooth, but not taller ( Fig. 37 ); outer margin of mandible smooth or only with a vague indication of crenulation. Setae submenti positioned between the bases of ventromental plates. Premandible with one apical tooth (however, there may be a faint indication of a notch) ( Fig. 38 ).

Figures

FIGURES 37–42. Cricotopus (Paratrichocladius) skirwithensis-type: 37—head capsule (arrow indicates first inner tooth of the mandible). C. (P.) skirwithensis-type: 38—detail of premandible). Cricotopus (Cricotopus) tremulus-type: 39—head capsule. Cricotopus/Orthocladius I: 40—head capsule. Diplocladius cultriger: 41—head capsule. D. cultriger: 42—detail of the head capsule (arrow indicates long and dense beard).