Arrowhead Rockmaster (Diphlebia nymphoides)

Arrowhead Rockmaster (Diphlebia nymphoides)

Inhabits streams and rivers, including slow and intermittently flowing rivers

© 2011 DECCW, NSW; 2021 Ian Endersby and DragonflyPix.com

• Diphlebiidae: Key couplet 2 of 9

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• ● Terga 4-6 black above, at least in midline

• Diphlebiidae: Key couplet 3 of 9

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• ● Terga 4-6 with blue patch on each side, more than half length of tergum
  
  ⇒ species: Arrowhead Rockmaster (Diphlebia nymphoides)

• Diphlebiidae: Key couplet 6 of 9

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• ● Abdominal terga 4-7 with or without black mid-dorsal line
  ● Segments 8, 9 black with pale markings

• Diphlebiidae: Key couplet 7 of 9

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• ● Dark mid-dorsal line on terga 2 and 3 considerably narrower than on terga 4-7, or missing, distal black dorsal patch on segments 4-6 more or less onion-shaped, rounded at sides

• Diphlebiidae: Key couplet 8 of 9

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• ● Mid-dorsal stripe on tergum 3 narrow in front, broadening progressively towards swollen spot at end of segment
  ○ South of Paluma-Eungella gap

• Diphlebiidae: Key couplet 9 of 9

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• ● Pale lateral stripe on terga 4-7 narrow, sharply downcurved in front, forming L-shape
  
  ⇒ species: Arrowhead Rockmaster (Diphlebia nymphoides)