
1) Class 2) Class symphyla
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https://www.crosswordclues.com/clue/symphyla

Symphylans, also known as garden centipedes or pseudocentipedes, are soil-dwelling arthropods of the class Symphyla in the subphylum Myriapoda. Symphylans resemble centipedes, but are smaller and translucent, and only distantly related to true centipedes. They can move rapidly through the pores between soil particles, and are typically found from ...
Found on
http://en.wikipedia.org/wiki/Symphyla

• (n. pl.) An order of small apterous insects having an elongated body, with three pairs of thoracic and about nine pairs of abdominal legs. They are, in many respects, intermediate between myriapods and true insects.
Found on
http://thinkexist.com/dictionary/meaning/symphyla/
Sym·phy'la noun plural [ New Latin , from Greek
sy`n with + ... a clan.]
(Zoology) An order of small apterous insects having an elongated body, with three pairs of thoracic and about nine pairs of abdominal legs. They are, in many respects, intermediate between myriapods and true...
Found on
http://www.encyclo.co.uk/webster/S/264

[
n] - small class of minute arthropods
Found on
http://www.webdictionary.co.uk/definition.php?query=Symphyla
class Symphyla noun small class of minute arthropods; unimportant except for the garden centipede
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.