Ramulus impigrum "Cuc Phuong"
(by Bruno Kneubuehler)
 

OrderPhasmatodea
 
SuborderVerophasmatodea 
InfraorderAreolatae 
FamilyPhasmatidaeGray, 1835
SubfamilyClitumninae
Brunner von Wattenwyl, 1893
TribeClitumniniBrunner von Wattenwyl, 1893
GenusRamulus Saussure, 1862
SpeciesRamulus impigrum
(Brunner v. Wattenwyl)

 
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General Notes

  • Brunner v. Wattenwyl described this species in 1907 as Cuniculina impigra
  • 2012 – this species is under taxonomical examination by Joachim
             Bresseel (Belgium)
  • 2012 - first successful culture by Bruno Kneubuehler
  • 2012 - this species has been distributed as Ramulus sp. "Cuc Phuong"
  • 2012 - identified as Ramulus impigrum

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Origin

  • Joachim Bresseel (Belgium) and Jérôme Constant (RBINS) found this species in July 2011 in Cuc Phuong, Vietnam (No. 49, "Ramulus sp. 4", Vietnam 2011)

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Females

  • very ornamental phasmids
  • about 12.5 – 14.5 cm long
  • body color with light brown, dark brown and black markings with many light dots
  • legs reddish with black markings
  • greenish eyes
  • two distinct spines on the head
  • very short antennae
  • no wings (apterous)

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Males

  • very delicate phasmids, with very long, thin legs
  • about 12 – 13 cm long
  • forelegs are about 16 – 17 cm long
  • forelegs, antennae, upper side of meso- and metathorax, abdominal ending are black
  • thighs of mid- and hindlegs are reddish-brown
  • short antennae
  • no wings (apterous)

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Nymphs

  • about 19 mm long (L1)
  • dark-grey with many light dots
  • very short antennae
  • by L4 it is quite easy to draw a distinction between ♀♂ (by the naked eye)

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Eggs

  • about 3 x 2 mm
  • light or dark brown, with white markings
  • irregular, roundish shaped
  • humpy surface
  • matt
  • no distinct capitulum present
  • micropylar plate very small

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Food Plants

  • bramble (Rubus sp.)
    is very well accepted by freshly hatched nymphs, older nymphs and adults
  • no other food plants have been tested by me (so far)

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Behaviour

  • nymphs as well as adults are rather passive during the day, and feed during the day
  • matings occur mainly during the night, couples stay together for only a few hours
  • a defensive spray has not been observed

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Developement

  • incubation time (HH-incubation on slightly damp sand at 20 - 23 °C) is about 6 – 7 months  (F1)
  • spread some dried  (!) moss over the eggs - this will make it much easier for the nymphs to hatch unscathed and it also reduces mould growth to some extend
  • hatching ratio in F1 was very high (> 50%)
  • males and females will be adult after about 3 months (at 20 – 23°C)
  • females start laying eggs after about  3 – 4  weeks
  • eggs are flinged away - with a swing of the abodmen
  • about 20 – 25 eggs per female and week
  • adults can live for several months

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Breeding Notes

  • my general notes on how to breed phasmids are a integral part of this care sheet ...
  • it is very easy to breed this species
  • as the freshly hatched nymphs are already quite big, therefore the incubation container should be big enough
  • keep the nymphs in a cage with good ventilation, but take care that the humidity does not drop too low
  • a constantly wet paper towel on the floor of the cage helps raising humidity
  • a humidity level of about 60+ % rH (for adults) and 75+ %  rH (for nymphs) seems to be fine
  • nymphs can be kept in a Faunabox (or similar cages)
  • move nymphs to a bigger cage as they grow bigger
  • a cage of about 40 x 40 x 40 cm should be provided for 3 – 4 adult couples (or considerably larger if the cage also contains other species !)
  • generally I advise to keep different phasmid species seperately (unfortunately, overcrowed cages are still too common ...)
  • I have never sprayed nymphs, adults or their cage with water
  • make shure that nymphs, which are about to undergo their adult moult, do not find places in the cage which would not offer them enough space beneath to moult successfully

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References

  • Phasmida Species Files  (www.phasmida.orthoptera.org)



 

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