- Pale colors dark aqua except for blue end of abdomen.
- Mesepimeron mostly pale.
- Abdomen mostly black.
- S8 black on top with a broken blue stripe on side.
- S9-10 blue above.
- Upper appendage with inner lobe much longer than outer and with a hooked tip.
Body length: 37.0-41.0
Local distribution: Pacific slope from lowlands to 600 m.
Habitat: Sunny riffles along medium streams.
Species range in Middle America: Costa Rica
Male abdomen length: 29
Female abdomen length: 26
Female hindwing length: 21
Updated: 22 November 2011