Species

The following specimens were found in 2003-2005 in China on the Tibetan Plateau (see map). Further details see  Plank (2010)

Map of samples (Plank 2010)

Acricotopus longipalpus-type

See also the species page with full detailed description

  • premandible: 2 (or 1 with an incision)
  • seta S1: 7
  • mandible: 3.5-1-0-1 (inner-apical-outer-surface) +/- large surface plate
  • mentum: middle 2, lateral 7 teeth (behind the 1st lateral is a small accessory tooth), beard present submental setation below 3.5st lateral teeth 4th instar (slightly worn mentum)

This species is similar to that one in Zelentsov 1989 but this 4th stage has a worn mentum.

Head of Acricotopus longipalpus

Acricotopus ?lucens-type

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  • premandible 1 or 2 +1 (apical slightly incised +basal)
  • seta S1 1.8
  • mentum: no accessory tooth next to 1st lateral, middle worn, 7 lateral teeth, submental setation below 3.5 lateral tooth, strong beared
  • mandible 3-1-0-0 (inner-apical-outer-surface)
  • 3rd instar?
  • quite strong postoccipital margin
Head of Acricotopus ?lucens-type

Cricotopus salinophilus Zinchenko et al. 2009

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  • premandible: 2+1 (apical+basal);
  • seta S1: 2 long;
  • mentum: 1 median tooth, 6 lateral, submental setation (extremely) laterad;
  • mandible: 3.5/4-1-0-0 (inner-apical-outer-surface), outer margin slightly engraved
  • postoccipital margin: brown
  • antenna: blade ratio=1
Head of Cricotopus salinophilus-type

Cricotopus shilovae Zelentsov 1989

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Solved: former named Cricotopus-Orthocladius indet 1 it is Cricotopus shilovae Zelentsov 1989.

  • premandible 1+1 (apical+large basal);
  • seta S1 1;
  • mentum: dark brown-black, 1 middle tooth, 6 lateral teeth, submental setation below 5th lateral tooth,
  • mandible 3.5-1-0-0 strongly engraved at outer margin;
  • antenna: RO-ratio (RO/ant-1st) ~0.22, blade ratio=1 i.e. as long as remainig antennal segments
  • postoccipital margin darkbrown-black
Head of Cricotopus shilovae-type

Metriocnemus terrester-type

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  • premandible: 2+2 (apical+basal)
  • seta S1: ?
  • mandible: 4-1-0-0 (inner-apical-outer-surface)
  • mentum: 1 middle, 5 lateral teeth
  • submental setation below 4th lateral teeth
Head of Metriocnemus terrester-type

Tanytarsus gracilentus Holmgren 1883

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  • premandible 5
  • mentum 1 tooth paler than outer 5 teeth, dark plate behind mentum;
  • antenna: 5 segments, pedicells ~ 2x 3-5th ant.segment, no spur; antennal pedestal: ~1.5x L:W;
  • mandible 3-1-3-2;
  • postoccipital margin dark brown, - plate well develloped trapezoid;
  • gula brown;
Head of Tanytarsus gracilentus-type

Tanytarsus lapponicus-type Lindeberg 1970

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Solved: former named T. lugens indet 1

  • premandible: 4+1 lateral spine, 
  • mandible: 3-1-2-2 (inner-apical-outer-surface),
  • mentum: lateral 5 teeth
  • 3rd instar
  • antenna 5 segments with small laterborn organs? on pedicells: ~1.5x 3-5ant., antennal pedestal ~1xwidth, no spur
  • head brown
Head of Tanytarsus lapponicus-type