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Arma custos 4th stadium nymph Replacement for the previous old and very mediocre image ;o)<br />
Here is a portrait:<br />
<figure class="photo"><a href="https://www.jungledragon.com/image/83892/arma_custos_l4_portrait.html" title="Arma custos L4 portrait"><img src="https://s3.amazonaws.com/media.jungledragon.com/images/3043/83892_thumb.jpg?AWSAccessKeyId=05GMT0V3GWVNE7GGM1R2&Expires=1571270410&Signature=1wvODJfouUz6oj8vjmVLl5Rp1Dw%3D" width="200" height="114" alt="Arma custos L4 portrait Here is a dorsal shot:<br />
https://www.jungledragon.com/image/83891/arma_custos_4th_stadium_nymph.html Arma,Arma custos,Asopinae,Hemiptera,Heteroptera,Nymph,Pentatomidae" /></a></figure> Arma,Arma custos,Asopinae,Hemiptera,Heteroptera,Nymph,Pentatomidae Click/tap to enlarge

Arma custos 4th stadium nymph

Replacement for the previous old and very mediocre image ;o)
Here is a portrait:

Arma custos L4 portrait Here is a dorsal shot:<br />
https://www.jungledragon.com/image/83891/arma_custos_4th_stadium_nymph.html Arma,Arma custos,Asopinae,Hemiptera,Heteroptera,Nymph,Pentatomidae

    comments (2)

  1. I really enjoy the detail you capture in your observations/images. I have just learned about stadium and stage in regard nymphs thanks to this posting - instar I was aware of. Thank you! Posted 14 days ago
    1. Hi Ruth and thanks for the flowers :o) The terms "instar" and "stadium" are exchangeable I think. Our national True Bug champion (Berend Aukema) doesn't seem to like the term "instar" much, so I've taken to using stadium a tad more, but overall people indicate the same thing with it. In most true bugs (I'm sure there are some exceptions), after hatching from the eggs into a 1st stadium/instar nymph (some would call it a larva, but that's a different language-issue) the little ones need to moult five more times before they are full grown, so the fourth stadium you see here is the one before the last nymphal stadium and two moults away from adulthood (imago) with fully developed wings. If you'll look at a 5th stadium/instar nymph/larva of the same species you'll see that the wing-capsules are clearly longer on that last stadium:
      Arma custos - L5 nearly done Last instar nymph of Shield Bug species Arma custos, only hours before shedding into adulthood.<br />
Ventral view of the same nymph here (note the strong rostrum of this predatory species): https://www.jungledragon.com/image/53213/arma_custos_l5_ventral.html<br />
Resulting imago, only a few hours later: https://www.jungledragon.com/image/53214/arma_custos_somewhat_teneral.html Arma,Arma custos,Asopinae,Hemiptera,Heteroptera,Nymph,Pentatomidae
      Posted 14 days ago, modified 14 days ago

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Arma custos is a stink bug in the Pentatomidae family.

Similar species: True Bugs
Species identified by Pudding4brains
View Pudding4brains's profile

By Pudding4brains

Public Domain
Uploaded Sep 3, 2019.