Bostra incompta
(by Dr. Sascha Eilmus, Germany, Biologist)
 

OrderPhasmatodea
 
SuborderVerophasmatodea 
InfraorderAnareolatae 
FamilyDiapheromeridaeKirby, 1904
SubfamilyDiapheromerinae
Kirby, 1904
TribeDiapheromerini
Kirby, 1904
GenusBostraStål, 1875
SpeciesB. incomptaRehn, 1904


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Orgin

  • stock 1
    culture stock has been collected by Sascha Eilmus on a journey to Costa Rica in July 2012 on a trail near Volcano Arenal, La Fortuna, Costa Rica

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Females

  • typical brown, bright green or dirty green phasmids
  • the size of the F1 generation varies around 14 to 16 cm
  • the wild-caught female was 14.5 cm
  • not winged
  • uniformly dull brown body coloration
  • 2 blunt spines on the head (brown lobe-like expansions)
  • in contrast to Alienobostra brocki, the subgenital plate is in B. incompta not longer than abdomen

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Males

  • also typical phasmids
  • about 9.5 cm long
  • not winged

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Eggs

  • brown
  • net-like bright surface structure
  • about 3 mm long

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Food Plants

  • bramble (Rubus spp.)
    easily accepted by both nymphs and adults
  • other plants which are eaily accepted:
    hazel (Corylus avellana), oak (Quercus spp.), rose (Rosa spp.), raspberry (Rubus idaeus)
  • in nature the female has been found feeding on plants of the families Fabaceae

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Behaviour

  • males as females can behave very hysteric and stagger around when being touched
  • this makes is not so easy to change food plants
  • during the day, nymphs are usually on the leaves of the food plants, sometimes with their abdomen in a “zigzag” position which is also known from Alienobostra brocki
  • one should handle them carefully, but they do not tend to drop legs
  • females lay several eggs per day, which they just drop to the ground

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Developement

  • incubate the eggs at room temperatures (18-25°C) on some humid substrate, e.g. vermiculite
  • incubation time is about 6 - 8 months
  • they will be adult after about 3 to 4 months at about 23°C

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Breeding Notes

  • an easy to breed species.
  • keep nymphs in a normal terrarium (for increased humidity)
  • adults can be kept in a quite airy cage
  • move nymphs to a bigger cage according to their size as they grow up
  • nymphs and adults have been sprayed with water 3 to 4 times a week
  • for a successful development and moult the terrarium was filled with a thin layer of moist vermiculite on the cage floor. Note that the original habitat of this stock is a very wet tropical forest

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References

  • Phasmida Species Files  (www.phasmida.orthoptera.org)
  • Eilmus S, Dernbach A. and Strumo R: Costa Rica - ein Reisebericht und Beobachtungen zu bemerkenswerten Vertretern der Stab- und Gespenstschrecken (Phasmatodea). ZAG Phoenix, ISSN 2190-3476, Jahrgang 3, Nr. 2, 2012

 

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