Dicrotendipes Kieffer 1913

Dicrotendipes Kieffer (Figs 77���82) Head capsule yellow, occipital margin darkened. Frontal apotome separated from clypeus (except for a European species, Dicrotendipes lobiger (Kieffer, 1921)), and there is an antero-median fenestra (oval to round or linear) on the frontal apotome (Figs 77, 78); anterior margin of frontal apotome may be crenulated (Fig. 77). Antenna 5-segmented, segment 4 exceptionally long. Premandible with 3 teeth, second one and third broad and blunt. Mandible with pale dorsal tooth, 1���2 small surficial and 3 inner teeth. Median tooth of mentum robust, sometimes laterally notched, 6 pairs of lateral teeth. First and second pairs sometimes partially fused. Sixth lateral tooth sometimes reduced into a broad lobe, so only five laterals are clearly visible. Ventromental plates narrow, visibly fan-shaped, completely striated, about half width of mentum; anterior margin smooth or crenate. Remarks: Mentum of Dicrotendipes is especially similar to that of Glyptotendipes, Einfeldia and Kiefferulus (all having fenestra in frons or frontoclypeus), however ventromental plates of these genera are much longer, (equalling to or exceeding width of mentum), while distinctly short in Dicrotendipes. Subfossil remains were rare, found in lakes with higher trophy. Two morphotypes were distinguished following Brooks et al. (2007). Dicrotendipes nervosus - type (Figs 79, 80) Ventromental plates crenulated at anterior margin. Dicrotendipes notatus - type (Figs 81, 82) Ventromental plates with smooth anterior margin. Dicrotendipes nervosus - type (Figs 79, 80) Ventromental plates crenulated at anterior margin. Dicrotendipes notatus - type (Figs 81, 82) Ventromental plates with smooth anterior margin.
Published as part of Chamutiov��, T��mea, Hamerl��k, Ladislav & Bitu����k, Peter, 2020, Subfossil chironomids (Diptera, Chironomidae) of lakes in the Tatra Mountains an illustrated guide, pp. 216-264 in Zootaxa 4819 (2) on pages 249-250, DOI: 10.11646/zootaxa.4819.2.2, http://zenodo.org/record/4396828
{"references":["Brooks, S. J., Langdon, P. G. & Heiri, O. (2007) The Identification and Use of Palaearctic Chironomidae Larvae in Palaeoecology. QRA Technical Guide No. 10. QRA, London, 276 pp."]}