Colobognatha

Colobognatha
	Octoglena sierra (Polyzoniida)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Subphylum:	Myriapoda
Class:	Diplopoda
Subclass:	Chilognatha
Infraclass:	Helminthomorpha
Clade:	Colobognatha; Brandt, 1834
Orders
	Platydesmida; Polyzoniida; Siphonocryptida; Siphonophorida

Colobognatha is a clade (formally considered a subterclass) of helminthomorph millipedes containing four orders: Platydesmida, Polyzoniida, Siphonocryptida, and Siphonophorida.^[1]

Description

The Colobognatha are united by several shared traits (synapomorphies). Males have two pairs of simple, leg-like gonopods, consisting of the rear leg pair of body segment 7 and the foreword-most leg pair of segment 8. They possess tubular defensive glands that open on the sides of the body, and lack a palp-like structure on their gnathochilaria. Other traits found in colobognathans, but not exclusively, include a distinctly narrow head, lack of Tömösváry organs, and no more than two pairs of ocelli.^[2]^[3]

References

^ Shear, W. (2011). "Class Diplopoda de Blainville in Gervais, 1844. In: Zhang, Z.-Q. (Ed.) Animal biodiversity: An outline of higher-level classification and survey of taxonomic richness" (PDF). Zootaxa. 3148: 159–164.
^ "Millipede Body Organization". Milli-PEET: The class Diplopoda. The Field Museum, Chicago. Archived from the original on 31 October 2013. Retrieved 18 March 2014.
^ "Putative apomorphies of millipede clades" (PDF). Milli-PEET: Millipede Systematics. The Field Museum, Chicago, IL. 26 September 2006. Archived from the original (PDF) on 26 December 2015. Retrieved 19 March 2014.

[Shear_2011_class.-1] Shear, W. (2011). "Class Diplopoda de Blainville in Gervais, 1844. In: Zhang, Z.-Q. (Ed.) Animal biodiversity: An outline of higher-level classification and survey of taxonomic richness" (PDF). Zootaxa. 3148: 159–164.

[2] "Millipede Body Organization". Milli-PEET: The class Diplopoda. The Field Museum, Chicago. Archived from the original on 31 October 2013. Retrieved 18 March 2014.

[PutativeApomorphies-3] "Putative apomorphies of millipede clades" (PDF). Milli-PEET: Millipede Systematics. The Field Museum, Chicago, IL. 26 September 2006. Archived from the original (PDF) on 26 December 2015. Retrieved 19 March 2014.

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