DragonflyPix

Stout Vicetail (Hemigomphus heteroclytus)

The Stout Vicetail (Hemigomphus heteroclytus) is a dragonfly species of the family Gomphidae, which contains 35 species in Australia.

The identification key to the family Gomphidae consists of 47 couplets, 14 of which are pertinent to Hemigomphus heteroclytus. Click on the numbers on the right to display the corresponding couplets. Or click on the ALLin1 button to see all the relevant couplets together in a single, scrollable window.

#FamilySpeciesCouplet No.
 GomphidaeStout Vicetail
(Hemigomphus heteroclytus)
  • Gomphidae: Key couplet 1 of 47

  • couplet drawingcouplet drawing
  • ● Generally no incomplete antenodal crossvein proximal to Ax1 in any wing
    ● End of abdomen not elongate, mid-dorsal length of abdominal tergum 9 less than 2.3 mm in male, 2.1 mm in female
  • b ↑
  • Gomphidae: Key couplet 10 of 47

  • couplet drawingcouplet drawing
    couplet drawingcouplet drawing
    couplet drawingcouplet drawing
  • ● Superior anal appendages converging at tips, bearing basal, ventral to lateral spine or toothed spur
  • b ↑
  • Gomphidae: Key couplet 11 of 47

  • couplet drawingcouplet drawing
  • ● Upper projection of bipartite sternum 11 concealed by basal, toothed spine of superior anal appendage
    ○ From eastern and northern Australia

    ⇒ genus: Hemigomphus
  • a ↑
  • Gomphidae: Key couplet 12 of 47

  • couplet drawingcouplet drawing
  • ● Abdominal sternites 7 and/or 8 each with pair of strong, central setal tufts protruding below ventral carina
  • b ↑
  • Gomphidae: Key couplet 13 of 47

  • couplet drawingcouplet drawing
  • ● Tip of superior appendage smoothly curved inwards
    ● Setal tufts on sternite 7 and 8
  • a ↑
  • Gomphidae: Key couplet 14 of 47

  • couplet drawing
  • ● Abdominal terga 4-7 with basal yellow ring, or basal pair of large yellow spots, narrowly separated in midline
  • b ↑
  • Gomphidae: Key couplet 15 of 47

  • couplet drawing
  • ● Superior appendages widely separated at base, maximum separation more than 1.05 mm
    ● Inner margin of superior appendage convex beyond basal divergence, curving smoothly into distal convergence

    ⇒ species: Stout Vicetail (Hemigomphus heteroclytus)
  • a ↑
  • Gomphidae: Key couplet 19 of 47

  • couplet drawing
  • ● Anterior part of abdominal segments 3 and 4, in front of supplementary transverse carina, with broad, mid-dorsal black patch or band
  • a ↑
  • Gomphidae: Key couplet 20 of 47

  • couplet drawing
  • ● Ovipositor less than half length of sternum 9
  • b ↑
  • Gomphidae: Key couplet 21 of 47

  • couplet drawing
  • ● Two or three (occasionally one) crossveins between sectors of arculus proximal to fork of Rs in hindwing
    ○ From eastern and northern Australia

    ⇒ genus: Hemigomphus
  • b ↑
  • Gomphidae: Key couplet 22 of 47

  • couplet drawingcouplet drawing
  • ● Occiput unarmed
  • b ↑
  • Gomphidae: Key couplet 24 of 47

  • couplet drawingcouplet drawing
    couplet drawing
  • ● Central part of yellow humeral stripe present, joined or not to upper humeral spot
  • b ↑
  • Gomphidae: Key couplet 25 of 47

  • couplet drawingcouplet drawing
  • ● Black band along line of intersegmental suture continuous below metastigma, lacking or almost so above it
  • b ↑
  • Gomphidae: Key couplet 26 of 47

  • couplet drawingcouplet drawing
  • ● Postgena not swollen on either side of occiput
    ● Antehumeral stripe commonly fused below with outer corner of collar

    ⇒ species: Stout Vicetail (Hemigomphus heteroclytus)
  • a ↑
1  
  • Gomphidae: Key couplet 1 of 47

  • couplet drawingcouplet drawing
  • ● Incomplete (subcostal) antenodal crossvein proximal to Ax1 usually present in forewings, sometimes lacking in hindwings
    ● End of abdomen elongate, mid-dorsal length of abdominal tergum 9 more than 2.4 mm in male, 2.3 mm in female

    ⇒ genus: Antipodogomphus
a ↑
b ↓
  • couplet drawingcouplet drawing
  • ● Generally no incomplete antenodal crossvein proximal to Ax1 in any wing
    ● End of abdomen not elongate, mid-dorsal length of abdominal tergum 9 less than 2.3 mm in male, 2.1 mm in female

2 Male only
  • Gomphidae: Key couplet 10 of 47

  • couplet drawingcouplet drawing
  • ● Superior anal appendages parallel or divergent, not converging at tips, each bearing a long, curved ventrobasal branch
a ↑
b ↓
  • couplet drawingcouplet drawing
    couplet drawingcouplet drawing
    couplet drawingcouplet drawing
  • ● Superior anal appendages converging at tips, bearing basal, ventral to lateral spine or toothed spur

3 Male only
  • Gomphidae: Key couplet 11 of 47

  • couplet drawingcouplet drawing
  • ● Upper projection of bipartite sternum 11 concealed by basal, toothed spine of superior anal appendage
    ○ From eastern and northern Australia

    ⇒ genus: Hemigomphus
a ↑
b ↓
  • couplet drawingcouplet drawing
    couplet drawingcouplet drawing
  • ● Upper projection of bipartite sternum 11 lying outside base of superior anal appendage, its upper end turned to rear and toothed or sculptured

4 Male only
  • Gomphidae: Key couplet 12 of 47

  • couplet drawing
  • ● Abdominal sternites 7 and 8 lacking strong, central tufts of setae

    ⇒ species: Kakadu Vicetail (Hemigomphus magela)
a ↑
b ↓
  • couplet drawingcouplet drawing
  • ● Abdominal sternites 7 and/or 8 each with pair of strong, central setal tufts protruding below ventral carina

5 Male only
  • Gomphidae: Key couplet 13 of 47

  • couplet drawingcouplet drawing
  • ● Tip of superior appendage smoothly curved inwards
    ● Setal tufts on sternite 7 and 8
a ↑
b ↓
  • couplet drawing
    couplet drawingcouplet drawing
  • ● Tip of superior appendage abruptly folded inward
    ● Setal tufts present or absent on sternite 7

6 Male only
  • Gomphidae: Key couplet 14 of 47

  • couplet drawing
  • ● Abdominal terga 4-7 with basal pair of small, lateral yellow spots, broadly separated in midline

    ⇒ species: Black Vicetail (Hemigomphus atratus)
a ↑
b ↓
  • couplet drawing
  • ● Abdominal terga 4-7 with basal yellow ring, or basal pair of large yellow spots, narrowly separated in midline

7 Male only
  • Gomphidae: Key couplet 15 of 47

  • couplet drawing
  • ● Superior appendages widely separated at base, maximum separation more than 1.05 mm
    ● Inner margin of superior appendage convex beyond basal divergence, curving smoothly into distal convergence

    ⇒ species: Stout Vicetail (Hemigomphus heteroclytus)
a ↑
b ↓
  • couplet drawing
  • ● Superior appendages closer at base
    ● Maximum separation less than 1.05 mm
    ● Inner margin of superior appendage almost straight from basal divergence to abrupt outward bend about 0.7 times inner length from base

    ⇒ species: Southern Vicetail (Hemigomphus gouldii)

8 Female only
  • Gomphidae: Key couplet 19 of 47

  • couplet drawing
  • ● Anterior part of abdominal segments 3 and 4, in front of supplementary transverse carina, with broad, mid-dorsal black patch or band
a ↑
b ↓
  • couplet drawing
    couplet drawing
    couplet drawing
  • ● Anterior of abdominal segments 3 and 4 with mid-dorsal yellow band, sometimes narrow, or entirely yellow

9 Female only
  • Gomphidae: Key couplet 20 of 47

  • couplet drawing
  • ● Ovipositor about as long as sternum 9

    ⇒ species: Pinchtail (Odontogomphus donnellyi)
a ↑
b ↓
  • couplet drawing
  • ● Ovipositor less than half length of sternum 9

10 Female only
  • Gomphidae: Key couplet 21 of 47

  • couplet drawing
  • ● One crossvein between sectors of arculus proximal to fork of Rs in hindwing
    ○ From south-western Australia

    ⇒ species: Armourtail (Armagomphus armiger)
a ↑
b ↓
  • couplet drawing
  • ● Two or three (occasionally one) crossveins between sectors of arculus proximal to fork of Rs in hindwing
    ○ From eastern and northern Australia

    ⇒ genus: Hemigomphus

11 Female only
  • Gomphidae: Key couplet 22 of 47

  • couplet drawingcouplet drawing
  • ● Occiput armed with central, more or less upright spine
a ↑
b ↓
  • couplet drawingcouplet drawing
  • ● Occiput unarmed

12 Female only
  • Gomphidae: Key couplet 24 of 47

  • couplet drawing
  • ● Yellow humeral stripe reduced to small upper and lower spots

    ⇒ species: Wallum Vicetail (Hemigomphus cooloola)
a ↑
b ↓
  • couplet drawingcouplet drawing
    couplet drawing
  • ● Central part of yellow humeral stripe present, joined or not to upper humeral spot

13 Female only
  • Gomphidae: Key couplet 25 of 47

  • couplet drawing
  • ● Black band along line of intersegmental suture of synthorax broken below metastigma, extensive to continuous above it

    ⇒ species: Kakadu Vicetail (Hemigomphus magela)
a ↑
b ↓
  • couplet drawingcouplet drawing
  • ● Black band along line of intersegmental suture continuous below metastigma, lacking or almost so above it

14 Female only
  • Gomphidae: Key couplet 26 of 47

  • couplet drawingcouplet drawing
  • ● Postgena not swollen on either side of occiput
    ● Antehumeral stripe commonly fused below with outer corner of collar

    ⇒ species: Stout Vicetail (Hemigomphus heteroclytus)
a ↑
b ↓
  • couplet drawingcouplet drawing
  • ● Postgena strongly swollen on either side of occiput, except in specimens from southern Victoria
    ● Antehumeral stripe commonly isolated from collar

    ⇒ species: Southern Vicetail (Hemigomphus gouldii)

Australian distribution