Metriocnemus van der Wulp
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publication ID |
https://doi.org/ 10.11646/zootaxa.4819.2.2 |
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publication LSID |
lsid:zoobank.org:pub:2459A542-6CF2-4545-9E6F-262C68838D99 |
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DOI |
https://doi.org/10.5281/zenodo.4437265 |
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persistent identifier |
https://treatment.plazi.org/id/03F487F1-FFAA-FFB3-FF22-FDF0AD1CFA4D |
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treatment provided by |
Plazi |
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scientific name |
Metriocnemus van der Wulp |
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Metriocnemus van der Wulp View in CoL View at ENA ( Figs 53 View FIGURES 49–53 , 54 View FIGURES 54–59 )
Head capsule yellow to dark brown, occipital margin pale or darkened. Antenna with 5 segments and variable in structure, sometimes reduced. Premandible with 2–4 apical teeth. Apical mandibular tooth short, 4–5 inner teeth are present. Mentum with 1–4 median teeth, usually lower than first of 5–6 pairs of lateral teeth. Ventromental plates very weak ( Figures 53 View FIGURES 49–53 , 54 View FIGURES 54–59 ).
Remarks: The shape of mentum with lower and narrower median teeth than the first laterals is routinely distinctive for the genus, however, the same pattern of mentum is typical for Thienemannia , so heads of both genera are indistinguishable in subfossil material. However, Thienemannia has not been recorded from the Tatra Mts.
Based on pupal exuviae material, two species: Metriocnemus fuscipes (Meigen, 1818) and Metriocnemus cf. obscuripes (Holmgren, 1869) were identified from the Tatra Mts. lakes ( Bitušík 2004).
Subfossil Metriocnemus remains were recorded rarely.
Two morphotypes were distinguished following Brooks et al. (2007).
Metriocnemus eurynotus - type ( Fig. 53 View FIGURES 49–53 )
Head capsule brown. Mentum with two short median teeth and with 5 pairs of lateral teeth gradually decreasing in size, first lateral tooth broader than median teeth.
Metriocnemus fuscipes - type ( Fig. 54 View FIGURES 54–59 )
Head capsule dark brown. Mentum with two short median teeth and with 5 pairs of lateral teeth, first and second lateral teeth longer and broader than median and other laterals.
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