Necrosciinae sp. "Con Dao"
(by Thies Büscher)
 

OrderPhasmatodea
 
SuborderVerophasmatodea 
InfraorderAnareolatae 
FamilyDiapheromeridaeKirby, 1904
SubfamilyNecrosciinaeBrunner v. Wattenwil, 1893
Tribe (not yet identified)
Genus (not yet identified)
SpeciesNecrosciinae sp. "Con Dao"(not yet identified)


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General Notes

  • Joachim Bresseel does taxonomical work on this species and genus
  • there are various similar Necrosciinae species which are part of this new genus and are going to be described by Joachim Bresseel
  • their appearance is very similar to Necrosciinae sp. “Cat Tien”, suspicion of relation

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Origin

  • Joachim Bresseel (Belgium) and Jérôme Constant (RBINS) collected this species in June 2012 in Con Dao National Park, Con Dao Archipelago, Vietnam

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Females

  • 70-80mm (body length)
  • short winged (hind wings reach to the middle of the abdomen, approx. 30mm)
  • colorful; head and wings in different brown shades
  • body dorsal green and ventral yellow
  • membranous part of the hind wings is deeply violet
  • the hind wings drift apart
  • long antennae
  • legs are turquoise

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Males

  • 60-65mm (body length)
  • wings reach ¾ of the Abdomen
  • colorful; head and wings in different brown shades
  • body dorsal green and ventral yellow
  • membranous part of the hind wings is deeply violet
  • long antennae
  • legs are turquoise
  • are able to fly, but rarely do so

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Nymphs

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Eggs

  • hatch after 3-4 months
  • short posterior spine
  • about 4.5 x 2 mm (including spine)
  • elongate-oval
  • spotted
  • often placed in clusters

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Food Plants

  • Bay laurel (Laurus nobilis)
    is accepted well.
  • Many willow species (Salix sp.) are accepted well; especially crack willow (Salix fragilis)
  • often accept crack willow (Salix fragilis) better than Laurus nobilis
  • I tried some different plants, but I did not find any further accepted foodplants
  • probably Salal (Gaultheria shallon) coated with Laurel also might work

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Behaviour

  • both, nymphs and adults, are rather active during the day
  • mostly active during the night
  • if small nymphs are touched, they use thanatosis.
  • older nymphs and adults (especially adult males) try to drop to the ground or crawl away, if being touched
  • an odorous defense spray is used
  • mating and deposition of eggs occurs during the night

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Developement

  • incubation time (HH-incubation on slightly damp sand at 20 - 23 °C) is approx. 3 months
  • high hatching ratio
  • I spread some dry moss over the eggs to support the process of hatching
  • females start laying eggs after about 2 – 3 weeks
  • eggs are sticked into different substrates
  • I offer floral foam for the deposition of the eggs and it was accepted very well
  • they lay about 10-15 Eggs per week
  • male and female live several months (5-7)

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Breeding Notes

  • keep them  in good ventilation with moderate humidity (60%+ rH)
  • I have never sprayed nymphs or adults with water, but I have watered  the soil once a week
  • a wet towel paper could also be enough to keep up the humidity
  • keep the nymphs in a cage that offers no chance to escape; for example a prepared  faunabox works
  • when the nymphs grow bigger, move them into cages of appropriate size
  • I generally keep species separately to avoid cross-breeding and overcrowding
  • choose cages which are high enough to avoid mistakes at moult and ensure that individuals have no chance to moult in places that would lead to miss-moult

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References

  • Phasmida Species Files  (www.phasmida.orthoptera.org).
  • Grootaert&Constant, A step further in the Entomodiversity of Vietnam (Part III), 2012 (http://www.taxonomy.be/gti_calls/grants_awarded/2004-grants-obtained-rbins-promoters/grootaert-constant/annual-reports/constant-2012-report.pdf)

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