Kingdom Animalia Infraclass Helminthomorpha | Class Diplopoda Phylum Arthropoda | |
 | ||
Clade Colobognatha
Brandt, 1834 Similar Siphoniulus, Pentazonia, Polyzoniida, Platydesmida, Siphonocryptida | ||
Colobognatha is a clade (formally considered a subterclass) of helminthomorph millipedes containing four orders: Platydesmida, Polyzoniida, Siphonocryptida, and Siphonophorida.
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.
References
Colobognatha Wikipedia(Text) CC BY-SA