holothoracic
adjective
holo·thoracic
"
: having the three parts of the thorax closely united
holothoracic insects
compare schizothoracic 
Word History
Etymology
hol- + thorac- + -ic
- intradistrict
- intrado
- intrados
- intradoses
- intraer
- intraest
- intrafallopian
- intrafascicular
- intraformational
- intragalactic
- intragenerational
- intragenic
- intraglacial
- intragovernmental
- intragranular
- intrail
- intraimperial
- intraindustrial
- intraisland
- intrait
- intramarginal
- intramatrical
- intramatrically
- intramental
- intramercurial