Everything about The Mesosoma totally explained
The
mesosoma is the middle part of the body, or
tagma, of
arthropods whose body is composed of three parts, the other two being the
prosoma and the
metasoma. It bears the
legs, and, in the case of winged
insects, the
wings.
In
Apocrita Hymenoptera (
wasps,
bees and
ants), it consists of the three
thoracic segments and the first
abdominal segment (the
propodeum). For historical reasons, in ants it's commonly referred to by the alternative name
alitrunk.
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In
scorpions, it's composed of six segments and forms the first part of the
abdomen, containing all of the major organs. The first segment contains the
sexual organs as well as a pair of
vestigial and modified
appendages forming a structure called the genital operculum. The second segment bears a pair of featherlike
sensory organs known as the pectines; the final four segments each contain a pair of
book lungs. The mesosoma is
armoured with
chitinous plates, on the upper surface by the
tergites and on the lower surface by the
sternites.
In other arachnids such as
spiders, the mesosoma is fused with the
metasoma to form the
opisthosoma.
Further Information
Get more info on 'Mesosoma'.
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