collum noun - the neck; the constricted posterior part of a pedunculate head, by which it connects to the trunk (thorax). It includes the nucha, gula, and myoglyphides.

In insects, the collum is typically difficult to see, usually covered by the head and thorax.

In millipedes, at least, collum corresponds to the first legless segment behind the head:

See Also

head

thorax

Print References

Jardine's Dictionary of Entomology (1)

Internet References

Wikipedia--Millipede

Works Cited

1.	Jardine's Dictionary of Entomology

Contributed by Cotinis on 27 May, 2007 - 4:11am
Last updated 2 March, 2021 - 8:24am

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